src/testing/testing_group.c

   1 /*
   2  This file is part of GNUnet
   3  (C) 2008, 2009 Christian Grothoff (and other contributing authors)
   4
   5  GNUnet is free software; you can redistribute it and/or modify
   6  it under the terms of the GNU General Public License as published
   7  by the Free Software Foundation; either version 3, or (at your
   8  option) any later version.
   9
  10  GNUnet is distributed in the hope that it will be useful, but
  11  WITHOUT ANY WARRANTY; without even the implied warranty of
  12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  General Public License for more details.
  14
  15  You should have received a copy of the GNU General Public License
  16  along with GNUnet; see the file COPYING.  If not, write to the
  17  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  Boston, MA 02111-1307, USA.
  19  */
  20
  21 /**
  22  * @file testing/testing_group.c
  23  * @brief convenience API for writing testcases for GNUnet
  24  * @author Nathan Evans
  25  * @author Christian Grothoff
  26  *
  27  */
  28 #include "platform.h"
  29 #include "gnunet_constants.h"
  30 #include "gnunet_arm_service.h"
  31 #include "gnunet_testing_lib.h"
  32 #include "gnunet_core_service.h"
  33
  34 #define VERBOSE_TESTING GNUNET_NO
  35
  36 #define VERBOSE_TOPOLOGY GNUNET_NO
  37
  38 #define DEBUG_CHURN GNUNET_NO
  39
  40 #define USE_START_HELPER GNUNET_YES
  41
  42 #define OLD 1
  43
  44 /* Before connecting peers, send all of the HELLOs */
  45 #define USE_SEND_HELLOS GNUNET_NO
  46
  47 #define TOPOLOGY_HACK GNUNET_YES
  48
  49
  50 /**
  51  * Lowest port used for GNUnet testing.  Should be high enough to not
  52  * conflict with other applications running on the hosts but be low
  53  * enough to not conflict with client-ports (typically starting around
  54  * 32k).
  55  */
  56 #define LOW_PORT 12000
  57
  58 /**
  59  * Highest port used for GNUnet testing.  Should be low enough to not
  60  * conflict with the port range for "local" ports (client apps; see
  61  * /proc/sys/net/ipv4/ip_local_port_range on Linux for example).
  62  */
  63 #define HIGH_PORT 56000
  64
  65 /* Maximum time to delay connect attempt */
  66 #define MAX_CONNECT_DELAY 300
  67
  68 /**
  69  * Which list of peers do we need to modify?
  70  */
  71 enum PeerLists
  72 {
  73   /** Modify allowed peers */
  74   ALLOWED,
  75
  76   /** Modify connect peers */
  77   CONNECT,
  78
  79   /** Modify blacklist peers */
  80   BLACKLIST,
  81
  82   /** Modify workingset peers */
  83   WORKING_SET
  84 };
  85
  86 /**
  87  * Prototype of a function called whenever two peers would be connected
  88  * in a certain topology.
  89  */
  90 typedef unsigned int
  91 (*GNUNET_TESTING_ConnectionProcessor)(struct GNUNET_TESTING_PeerGroup * pg,
  92                                       unsigned int first, unsigned int second,
  93                                       enum PeerLists list, unsigned int check);
  94
  95 /**
  96  * Context for handling churning a peer group
  97  */
  98 struct ChurnContext
  99 {
 100   /**
 101    * The peergroup we are dealing with.
 102    */
 103   struct GNUNET_TESTING_PeerGroup *pg;
 104
 105   /**
 106    * Callback used to notify of churning finished
 107    */
 108   GNUNET_TESTING_NotifyCompletion cb;
 109
 110   /**
 111    * Closure for callback
 112    */
 113   void *cb_cls;
 114
 115   /**
 116    * Number of peers that still need to be started
 117    */
 118   unsigned int num_to_start;
 119
 120   /**
 121    * Number of peers that still need to be stopped
 122    */
 123   unsigned int num_to_stop;
 124
 125   /**
 126    * Number of peers that failed to start
 127    */
 128   unsigned int num_failed_start;
 129
 130   /**
 131    * Number of peers that failed to stop
 132    */
 133   unsigned int num_failed_stop;
 134 };
 135
 136 struct RestartContext
 137 {
 138   /**
 139    * The group of peers being restarted
 140    */
 141   struct GNUNET_TESTING_PeerGroup *peer_group;
 142
 143   /**
 144    * How many peers have been restarted thus far
 145    */
 146   unsigned int peers_restarted;
 147
 148   /**
 149    * How many peers got an error when restarting
 150    */
 151   unsigned int peers_restart_failed;
 152
 153   /**
 154    * The function to call once all peers have been restarted
 155    */
 156   GNUNET_TESTING_NotifyCompletion callback;
 157
 158   /**
 159    * Closure for callback function
 160    */
 161   void *callback_cls;
 162
 163 };
 164
 165 struct SendHelloContext
 166 {
 167   /**
 168    * Global handle to the peer group.
 169    */
 170   struct GNUNET_TESTING_PeerGroup *pg;
 171
 172   /**
 173    * The data about this specific peer.
 174    */
 175   struct PeerData *peer;
 176
 177   /**
 178    * The next HELLO that needs sent to this peer.
 179    */
 180   struct PeerConnection *peer_pos;
 181
 182   /**
 183    * Are we connected to CORE yet?
 184    */
 185   unsigned int core_ready;
 186
 187   /**
 188    * How many attempts should we make for failed connections?
 189    */
 190   unsigned int connect_attempts;
 191
 192   /**
 193    * Task for scheduling core connect requests to be sent.
 194    */
 195   GNUNET_SCHEDULER_TaskIdentifier core_connect_task;
 196 };
 197
 198 struct ShutdownContext
 199 {
 200   struct GNUNET_TESTING_PeerGroup *pg;
 201   /**
 202    * Total peers to wait for
 203    */
 204   unsigned int total_peers;
 205
 206   /**
 207    * Number of peers successfully shut down
 208    */
 209   unsigned int peers_down;
 210
 211   /**
 212    * Number of peers failed to shut down
 213    */
 214   unsigned int peers_failed;
 215
 216   /**
 217    * Number of peers we have started shutting
 218    * down.  If too many, wait on them.
 219    */
 220   unsigned int outstanding;
 221
 222   /**
 223    * Timeout for shutdown.
 224    */
 225   struct GNUNET_TIME_Relative timeout;
 226
 227   /**
 228    * Callback to call when all peers either
 229    * shutdown or failed to shutdown
 230    */
 231   GNUNET_TESTING_NotifyCompletion cb;
 232
 233   /**
 234    * Closure for cb
 235    */
 236   void *cb_cls;
 237 };
 238
 239 /**
 240  * Individual shutdown context for a particular peer.
 241  */
 242 struct PeerShutdownContext
 243 {
 244   /**
 245    * Pointer to the high level shutdown context.
 246    */
 247   struct ShutdownContext *shutdown_ctx;
 248
 249   /**
 250    * The daemon handle for the peer to shut down.
 251    */
 252   struct GNUNET_TESTING_Daemon *daemon;
 253 };
 254
 255 /**
 256  * Individual shutdown context for a particular peer.
 257  */
 258 struct PeerRestartContext
 259 {
 260   /**
 261    * Pointer to the high level restart context.
 262    */
 263   struct ChurnRestartContext *churn_restart_ctx;
 264
 265   /**
 266    * The daemon handle for the peer to shut down.
 267    */
 268   struct GNUNET_TESTING_Daemon *daemon;
 269 };
 270
 271 struct CreateTopologyContext
 272 {
 273
 274   /**
 275    * Function to call with number of connections
 276    */
 277   GNUNET_TESTING_NotifyConnections cont;
 278
 279   /**
 280    * Closure for connection notification
 281    */
 282   void *cls;
 283 };
 284
 285 enum States
 286 {
 287   /** Waiting to read number of peers */
 288   NUM_PEERS,
 289
 290   /** Should find next peer index */
 291   PEER_INDEX,
 292
 293   /** Should find colon */
 294   COLON,
 295
 296   /** Should read other peer index, space, or endline */
 297   OTHER_PEER_INDEX
 298 };
 299
 300 #if OLD
 301 struct PeerConnection
 302 {
 303   /**
 304    * Doubly Linked list
 305    */
 306   struct PeerConnection *prev;
 307
 308   /*
 309    * Doubly Linked list
 310    */
 311   struct PeerConnection *next;
 312
 313   /*
 314    * Index of daemon in pg->peers
 315    */
 316   uint32_t index;
 317
 318 };
 319 #endif
 320
 321 struct InternalStartContext
 322 {
 323   /**
 324    * Pointer to peerdata
 325    */
 326   struct PeerData *peer;
 327
 328   /**
 329    * Timeout for peer startup
 330    */
 331   struct GNUNET_TIME_Relative timeout;
 332
 333   /**
 334    * Client callback for hostkey notification
 335    */
 336   GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback;
 337
 338   /**
 339    * Closure for hostkey_callback
 340    */
 341   void *hostkey_cls;
 342
 343   /**
 344    * Client callback for peer start notification
 345    */
 346   GNUNET_TESTING_NotifyDaemonRunning start_cb;
 347
 348   /**
 349    * Closure for cb
 350    */
 351   void *start_cb_cls;
 352
 353   /**
 354    * Hostname, where to start the peer
 355    */
 356   const char *hostname;
 357
 358   /**
 359    * Username to use when connecting to the
 360    * host via ssh.
 361    */
 362   const char *username;
 363
 364   /**
 365    * Pointer to starting memory location of a hostkey
 366    */
 367   const char *hostkey;
 368
 369   /**
 370    * Port to use for ssh.
 371    */
 372   uint16_t sshport;
 373
 374 };
 375
 376 struct ChurnRestartContext
 377 {
 378   /**
 379    * PeerGroup that we are working with.
 380    */
 381   struct GNUNET_TESTING_PeerGroup *pg;
 382
 383   /**
 384    * Number of restarts currently in flight.
 385    */
 386   unsigned int outstanding;
 387
 388   /**
 389    * Handle to the underlying churn context.
 390    */
 391   struct ChurnContext *churn_ctx;
 392
 393   /**
 394    * How long to allow the operation to take.
 395    */
 396   struct GNUNET_TIME_Relative timeout;
 397 };
 398
 399 struct OutstandingSSH
 400 {
 401   struct OutstandingSSH *next;
 402
 403   struct OutstandingSSH *prev;
 404
 405   /**
 406    * Number of current ssh connections.
 407    */
 408   uint32_t outstanding;
 409
 410   /**
 411    * The hostname of this peer.
 412    */
 413   const char *hostname;
 414 };
 415
 416 /**
 417  * Data we keep per peer.
 418  */
 419 struct PeerData
 420 {
 421   /**
 422    * (Initial) configuration of the host.
 423    * (initial because clients could change
 424    *  it and we would not know about those
 425    *  updates).
 426    */
 427   struct GNUNET_CONFIGURATION_Handle *cfg;
 428
 429   /**
 430    * Handle for controlling the daemon.
 431    */
 432   struct GNUNET_TESTING_Daemon *daemon;
 433
 434   /**
 435    * The peergroup this peer belongs to.
 436    */
 437   struct GNUNET_TESTING_PeerGroup *pg;
 438
 439 #if OLD
 440   /**
 441    * Linked list of allowed peer connections.
 442    */
 443   struct PeerConnection *allowed_peers_head;
 444
 445   /**
 446    * Linked list of allowed peer connections.
 447    */
 448   struct PeerConnection *allowed_peers_tail;
 449
 450   /**
 451    * Linked list of blacklisted peer connections.
 452    */
 453   struct PeerConnection *blacklisted_peers_head;
 454
 455   /**
 456    * Linked list of blacklisted peer connections.
 457    */
 458   struct PeerConnection *blacklisted_peers_tail;
 459
 460   /**
 461    * Linked list of connect peer connections.
 462    */
 463   struct PeerConnection *connect_peers_head;
 464
 465   /**
 466    * Linked list of connect peer connections.
 467    */
 468   struct PeerConnection *connect_peers_tail;
 469
 470   /**
 471    * Linked list of connect peer connections.
 472    */
 473   struct PeerConnection *connect_peers_working_set_head;
 474
 475   /**
 476    * Linked list of connect peer connections.
 477    */
 478   struct PeerConnection *connect_peers_working_set_tail;
 479
 480 #else
 481   /**
 482    * Hash map of allowed peer connections (F2F created topology)
 483    */
 484   struct GNUNET_CONTAINER_MultiHashMap *allowed_peers;
 485
 486   /**
 487    * Hash map of blacklisted peers
 488    */
 489   struct GNUNET_CONTAINER_MultiHashMap *blacklisted_peers;
 490
 491   /**
 492    * Hash map of peer connections
 493    */
 494   struct GNUNET_CONTAINER_MultiHashMap *connect_peers;
 495
 496   /**
 497    * Temporary hash map of peer connections
 498    */
 499   struct GNUNET_CONTAINER_MultiHashMap *connect_peers_working_set;
 500 #endif
 501
 502   /**
 503    * Temporary variable for topology creation, should be reset before
 504    * creating any topology so the count is valid once finished.
 505    */
 506   int num_connections;
 507
 508   /**
 509    * Context to keep track of peers being started, to
 510    * stagger hostkey generation and peer startup.
 511    */
 512   struct InternalStartContext internal_context;
 513 };
 514
 515 /**
 516  * Linked list of per-host data.
 517  */
 518 struct HostData
 519 {
 520   /**
 521    * Name of the host.
 522    */
 523   char *hostname;
 524
 525   /**
 526    * SSH username to use when connecting to this host.
 527    */
 528   char *username;
 529
 530   /**
 531    * SSH port to use when connecting to this host.
 532    */
 533   uint16_t sshport;
 534
 535   /**
 536    * Lowest port that we have not yet used
 537    * for GNUnet.
 538    */
 539   uint16_t minport;
 540 };
 541
 542 struct TopologyIterateContext
 543 {
 544   /**
 545    * The peergroup we are working with.
 546    */
 547   struct GNUNET_TESTING_PeerGroup *pg;
 548
 549   /**
 550    * Callback for notifying of two connected peers.
 551    */
 552   GNUNET_TESTING_NotifyTopology topology_cb;
 553
 554   /**
 555    * Closure for topology_cb
 556    */
 557   void *cls;
 558
 559   /**
 560    * Number of peers currently connected to.
 561    */
 562   unsigned int connected;
 563
 564   /**
 565    * Number of peers we have finished iterating.
 566    */
 567   unsigned int completed;
 568
 569   /**
 570    * Number of peers total.
 571    */
 572   unsigned int total;
 573 };
 574
 575 struct StatsIterateContext
 576 {
 577   /**
 578    * The peergroup that we are dealing with.
 579    */
 580   struct GNUNET_TESTING_PeerGroup *pg;
 581
 582   /**
 583    * Continuation to call once all stats information has been retrieved.
 584    */
 585   GNUNET_STATISTICS_Callback cont;
 586
 587   /**
 588    * Proc function to call on each value received.
 589    */
 590   GNUNET_TESTING_STATISTICS_Iterator proc;
 591
 592   /**
 593    * Closure for topology_cb
 594    */
 595   void *cls;
 596
 597   /**
 598    * Number of peers currently connected to.
 599    */
 600   unsigned int connected;
 601
 602   /**
 603    * Number of peers we have finished iterating.
 604    */
 605   unsigned int completed;
 606
 607   /**
 608    * Number of peers total.
 609    */
 610   unsigned int total;
 611 };
 612
 613 struct CoreContext
 614 {
 615   void *iter_context;
 616   struct GNUNET_TESTING_Daemon *daemon;
 617 };
 618
 619 struct StatsCoreContext
 620 {
 621   void *iter_context;
 622   struct GNUNET_TESTING_Daemon *daemon;
 623   /**
 624    * Handle to the statistics service.
 625    */
 626   struct GNUNET_STATISTICS_Handle *stats_handle;
 627
 628   /**
 629    * Handle for getting statistics.
 630    */
 631   struct GNUNET_STATISTICS_GetHandle *stats_get_handle;
 632 };
 633
 634 struct ConnectTopologyContext
 635 {
 636   /**
 637    * How many connections are left to create.
 638    */
 639   unsigned int remaining_connections;
 640
 641   /**
 642    * Handle to group of peers.
 643    */
 644   struct GNUNET_TESTING_PeerGroup *pg;
 645
 646   /**
 647    * How long to try this connection before timing out.
 648    */
 649   struct GNUNET_TIME_Relative connect_timeout;
 650
 651   /**
 652    * How many times to retry connecting the two peers.
 653    */
 654   unsigned int connect_attempts;
 655
 656   /**
 657    * Temp value set for each iteration.
 658    */
 659   //struct PeerData *first;
 660
 661   /**
 662    * Notification that all peers are connected.
 663    */
 664   GNUNET_TESTING_NotifyCompletion notify_connections_done;
 665
 666   /**
 667    * Closure for notify.
 668    */
 669   void *notify_cls;
 670 };
 671
 672 /**
 673  * Handle to a group of GNUnet peers.
 674  */
 675 struct GNUNET_TESTING_PeerGroup
 676 {
 677   /**
 678    * Configuration template.
 679    */
 680   const struct GNUNET_CONFIGURATION_Handle *cfg;
 681
 682   /**
 683    * Function to call on each started daemon.
 684    */
 685   //GNUNET_TESTING_NotifyDaemonRunning cb;
 686
 687   /**
 688    * Closure for cb.
 689    */
 690   //void *cb_cls;
 691
 692   /*
 693    * Function to call on each topology connection created
 694    */
 695   GNUNET_TESTING_NotifyConnection notify_connection;
 696
 697   /*
 698    * Callback for notify_connection
 699    */
 700   void *notify_connection_cls;
 701
 702   /**
 703    * Array of information about hosts.
 704    */
 705   struct HostData *hosts;
 706
 707   /**
 708    * Number of hosts (size of HostData)
 709    */
 710   unsigned int num_hosts;
 711
 712   /**
 713    * Array of "total" peers.
 714    */
 715   struct PeerData *peers;
 716
 717   /**
 718    * Number of peers in this group.
 719    */
 720   unsigned int total;
 721
 722   /**
 723    * At what time should we fail the peer startup process?
 724    */
 725   struct GNUNET_TIME_Absolute max_timeout;
 726
 727   /**
 728    * How many peers are being started right now?
 729    */
 730   unsigned int starting;
 731
 732   /**
 733    * How many peers have already been started?
 734    */
 735   unsigned int started;
 736
 737   /**
 738    * Number of possible connections to peers
 739    * at a time.
 740    */
 741   unsigned int max_outstanding_connections;
 742
 743   /**
 744    * Number of ssh connections to peers (max).
 745    */
 746   unsigned int max_concurrent_ssh;
 747
 748   /**
 749    * Number of connects we are waiting on, allows us to rate limit
 750    * connect attempts.
 751    */
 752   unsigned int outstanding_connects;
 753
 754   /**
 755    * Number of HELLOs we have yet to send.
 756    */
 757   unsigned int remaining_hellos;
 758
 759   /**
 760    * How many connects have already been scheduled?
 761    */
 762   unsigned int total_connects_scheduled;
 763
 764   /**
 765    * Hostkeys loaded from a file.
 766    */
 767   char *hostkey_data;
 768
 769   /**
 770    * Head of DLL to keep track of the number of outstanding
 771    * ssh connections per peer.
 772    */
 773   struct OutstandingSSH *ssh_head;
 774
 775   /**
 776    * Tail of DLL to keep track of the number of outstanding
 777    * ssh connections per peer.
 778    */
 779   struct OutstandingSSH *ssh_tail;
 780
 781   /**
 782    * Stop scheduling peers connecting.
 783    */
 784   unsigned int stop_connects;
 785
 786   /**
 787    * Connection context for peer group.
 788    */
 789   struct ConnectTopologyContext ct_ctx;
 790 };
 791
 792 struct UpdateContext
 793 {
 794   /**
 795    * The altered configuration.
 796    */
 797   struct GNUNET_CONFIGURATION_Handle *ret;
 798
 799   /**
 800    * The original configuration to alter.
 801    */
 802   const struct GNUNET_CONFIGURATION_Handle *orig;
 803
 804   /**
 805    * The hostname that this peer will run on.
 806    */
 807   const char *hostname;
 808
 809   /**
 810    * The next possible port to assign.
 811    */
 812   unsigned int nport;
 813
 814   /**
 815    * Unique number for unix domain sockets.
 816    */
 817   unsigned int upnum;
 818
 819   /**
 820    * Unique number for this peer/host to offset
 821    * things that are grouped by host.
 822    */
 823   unsigned int fdnum;
 824 };
 825
 826 struct ConnectContext
 827 {
 828   /**
 829    * Index of peer to connect second to.
 830    */
 831   uint32_t first_index;
 832
 833   /**
 834    * Index of peer to connect first to.
 835    */
 836   uint32_t second_index;
 837
 838   /**
 839    * Higher level topology connection context.
 840    */
 841   struct ConnectTopologyContext *ct_ctx;
 842
 843   /**
 844    * Whether this connection has been accounted for in the schedule_connect call.
 845    */
 846   int counted;
 847 };
 848
 849 struct UnblacklistContext
 850 {
 851   /**
 852    * The peergroup
 853    */
 854   struct GNUNET_TESTING_PeerGroup *pg;
 855
 856   /**
 857    * uid of the first peer
 858    */
 859   uint32_t first_uid;
 860 };
 861
 862 struct RandomContext
 863 {
 864   /**
 865    * The peergroup
 866    */
 867   struct GNUNET_TESTING_PeerGroup *pg;
 868
 869   /**
 870    * uid of the first peer
 871    */
 872   uint32_t first_uid;
 873
 874   /**
 875    * Peer data for first peer.
 876    */
 877   struct PeerData *first;
 878
 879   /**
 880    * Random percentage to use
 881    */
 882   double percentage;
 883 };
 884
 885 struct MinimumContext
 886 {
 887   /**
 888    * The peergroup
 889    */
 890   struct GNUNET_TESTING_PeerGroup *pg;
 891
 892   /**
 893    * uid of the first peer
 894    */
 895   uint32_t first_uid;
 896
 897   /**
 898    * Peer data for first peer.
 899    */
 900   struct PeerData *first;
 901
 902   /**
 903    * Number of conns per peer
 904    */
 905   unsigned int num_to_add;
 906
 907   /**
 908    * Permuted array of all possible connections.  Only add the Nth
 909    * peer if it's in the Nth position.
 910    */
 911   unsigned int *pg_array;
 912
 913   /**
 914    * What number is the current element we are iterating over?
 915    */
 916   unsigned int current;
 917 };
 918
 919 struct DFSContext
 920 {
 921   /**
 922    * The peergroup
 923    */
 924   struct GNUNET_TESTING_PeerGroup *pg;
 925
 926   /**
 927    * uid of the first peer
 928    */
 929   uint32_t first_uid;
 930
 931   /**
 932    * uid of the second peer
 933    */
 934   uint32_t second_uid;
 935
 936   /**
 937    * Peer data for first peer.
 938    */
 939   struct PeerData *first;
 940
 941   /**
 942    * Which peer has been chosen as the one to add?
 943    */
 944   unsigned int chosen;
 945
 946   /**
 947    * What number is the current element we are iterating over?
 948    */
 949   unsigned int current;
 950 };
 951
 952 /**
 953  * Simple struct to keep track of progress, and print a
 954  * nice little percentage meter for long running tasks.
 955  */
 956 struct ProgressMeter
 957 {
 958   unsigned int total;
 959
 960   unsigned int modnum;
 961
 962   unsigned int dotnum;
 963
 964   unsigned int completed;
 965
 966   int print;
 967
 968   char *startup_string;
 969 };
 970
 971 #if !OLD
 972 /**
 973  * Convert unique ID to hash code.
 974  *
 975  * @param uid unique ID to convert
 976  * @param hash set to uid (extended with zeros)
 977  */
 978 static void
 979 hash_from_uid (uint32_t uid, GNUNET_HashCode * hash)
 980   {
 981     memset (hash, 0, sizeof (GNUNET_HashCode));
 982     *((uint32_t *) hash) = uid;
 983   }
 984
 985 /**
 986  * Convert hash code to unique ID.
 987  *
 988  * @param uid unique ID to convert
 989  * @param hash set to uid (extended with zeros)
 990  */
 991 static void
 992 uid_from_hash (const GNUNET_HashCode * hash, uint32_t * uid)
 993   {
 994     memcpy (uid, hash, sizeof (uint32_t));
 995   }
 996 #endif
 997
 998 #if USE_SEND_HELLOS
 999 static struct GNUNET_CORE_MessageHandler no_handlers[] =
1000   {
1001       { NULL, 0, 0}};
1002 #endif
1003
1004 /**
1005  * Create a meter to keep track of the progress of some task.
1006  *
1007  * @param total the total number of items to complete
1008  * @param start_string a string to prefix the meter with (if printing)
1009  * @param print GNUNET_YES to print the meter, GNUNET_NO to count
1010  *              internally only
1011  *
1012  * @return the progress meter
1013  */
1014 static struct ProgressMeter *
1015 create_meter(unsigned int total, char * start_string, int print)
1016 {
1017   struct ProgressMeter *ret;
1018   ret = GNUNET_malloc(sizeof(struct ProgressMeter));
1019   ret->print = print;
1020   ret->total = total;
1021   ret->modnum = total / 4;
1022   if (ret->modnum == 0) /* Divide by zero check */
1023     ret->modnum = 1;
1024   ret->dotnum = (total / 50) + 1;
1025   if (start_string != NULL)
1026     ret->startup_string = GNUNET_strdup(start_string);
1027   else
1028     ret->startup_string = GNUNET_strdup("");
1029
1030   return ret;
1031 }
1032
1033 /**
1034  * Update progress meter (increment by one).
1035  *
1036  * @param meter the meter to update and print info for
1037  *
1038  * @return GNUNET_YES if called the total requested,
1039  *         GNUNET_NO if more items expected
1040  */
1041 static int
1042 update_meter(struct ProgressMeter *meter)
1043 {
1044   if (meter->print == GNUNET_YES)
1045     {
1046       if (meter->completed % meter->modnum == 0)
1047         {
1048           if (meter->completed == 0)
1049             {
1050               fprintf (stdout, "%sProgress: [0%%", meter->startup_string);
1051             }
1052           else
1053             fprintf (stdout, "%d%%", (int) (((float) meter->completed
1054                 / meter->total) * 100));
1055         }
1056       else if (meter->completed % meter->dotnum == 0)
1057         fprintf (stdout, ".");
1058
1059       if (meter->completed + 1 == meter->total)
1060         fprintf (stdout, "%d%%]\n", 100);
1061       fflush (stdout);
1062     }
1063   meter->completed++;
1064
1065   if (meter->completed == meter->total)
1066     return GNUNET_YES;
1067   if (meter->completed > meter->total)
1068     GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Progress meter overflow!!\n");
1069   return GNUNET_NO;
1070 }
1071
1072 /**
1073  * Reset progress meter.
1074  *
1075  * @param meter the meter to reset
1076  *
1077  * @return GNUNET_YES if meter reset,
1078  *         GNUNET_SYSERR on error
1079  */
1080 static int
1081 reset_meter(struct ProgressMeter *meter)
1082 {
1083   if (meter == NULL)
1084     return GNUNET_SYSERR;
1085
1086   meter->completed = 0;
1087   return GNUNET_YES;
1088 }
1089
1090 /**
1091  * Release resources for meter
1092  *
1093  * @param meter the meter to free
1094  */
1095 static void
1096 free_meter(struct ProgressMeter *meter)
1097 {
1098   GNUNET_free_non_null (meter->startup_string);
1099   GNUNET_free (meter);
1100 }
1101
1102 /**
1103  * Get a topology from a string input.
1104  *
1105  * @param topology where to write the retrieved topology
1106  * @param topology_string The string to attempt to
1107  *        get a configuration value from
1108  * @return GNUNET_YES if topology string matched a
1109  *         known topology, GNUNET_NO if not
1110  */
1111 int
1112 GNUNET_TESTING_topology_get(enum GNUNET_TESTING_Topology *topology,
1113                             const char *topology_string)
1114 {
1115   /**
1116    * Strings representing topologies in enum
1117    */
1118   static const char *topology_strings[] =
1119     {
1120     /**
1121      * A clique (everyone connected to everyone else).
1122      */
1123     "CLIQUE",
1124
1125     /**
1126      * Small-world network (2d torus plus random links).
1127      */
1128     "SMALL_WORLD",
1129
1130     /**
1131      * Small-world network (ring plus random links).
1132      */
1133     "SMALL_WORLD_RING",
1134
1135     /**
1136      * Ring topology.
1137      */
1138     "RING",
1139
1140     /**
1141      * 2-d torus.
1142      */
1143     "2D_TORUS",
1144
1145     /**
1146      * Random graph.
1147      */
1148     "ERDOS_RENYI",
1149
1150     /**
1151      * Certain percentage of peers are unable to communicate directly
1152      * replicating NAT conditions
1153      */
1154     "INTERNAT",
1155
1156     /**
1157      * Scale free topology.
1158      */
1159     "SCALE_FREE",
1160
1161     /**
1162      * Straight line topology.
1163      */
1164     "LINE",
1165
1166     /**
1167      * All peers are disconnected.
1168      */
1169     "NONE",
1170
1171     /**
1172      * Read the topology from a file.
1173      */
1174     "FROM_FILE",
1175
1176     NULL };
1177
1178   int curr = 0;
1179   if (topology_string == NULL)
1180     return GNUNET_NO;
1181   while (topology_strings[curr] != NULL)
1182     {
1183       if (strcasecmp (topology_strings[curr], topology_string) == 0)
1184         {
1185           *topology = curr;
1186           return GNUNET_YES;
1187         }
1188       curr++;
1189     }
1190   *topology = GNUNET_TESTING_TOPOLOGY_NONE;
1191   return GNUNET_NO;
1192 }
1193
1194 /**
1195  * Get connect topology option from string input.
1196  *
1197  * @param topology_option where to write the retrieved topology
1198  * @param topology_string The string to attempt to
1199  *        get a configuration value from
1200  * @return GNUNET_YES if string matched a known
1201  *         topology option, GNUNET_NO if not
1202  */
1203 int
1204 GNUNET_TESTING_topology_option_get(
1205                                    enum GNUNET_TESTING_TopologyOption *topology_option,
1206                                    const char *topology_string)
1207 {
1208   /**
1209    * Options for connecting a topology as strings.
1210    */
1211   static const char *topology_option_strings[] =
1212     {
1213     /**
1214      * Try to connect all peers specified in the topology.
1215      */
1216     "CONNECT_ALL",
1217
1218     /**
1219      * Choose a random subset of connections to create.
1220      */
1221     "CONNECT_RANDOM_SUBSET",
1222
1223     /**
1224      * Create at least X connections for each peer.
1225      */
1226     "CONNECT_MINIMUM",
1227
1228     /**
1229      * Using a depth first search, create one connection
1230      * per peer.  If any are missed (graph disconnected)
1231      * start over at those peers until all have at least one
1232      * connection.
1233      */
1234     "CONNECT_DFS",
1235
1236     /**
1237      * Find the N closest peers to each allowed peer in the
1238      * topology and make sure a connection to those peers
1239      * exists in the connect topology.
1240      */
1241     "CONNECT_CLOSEST",
1242
1243     /**
1244      * No options specified.
1245      */
1246     "CONNECT_NONE",
1247
1248     NULL };
1249   int curr = 0;
1250
1251   if (topology_string == NULL)
1252     return GNUNET_NO;
1253   while (NULL != topology_option_strings[curr])
1254     {
1255       if (strcasecmp (topology_option_strings[curr], topology_string) == 0)
1256         {
1257           *topology_option = curr;
1258           return GNUNET_YES;
1259         }
1260       curr++;
1261     }
1262   *topology_option = GNUNET_TESTING_TOPOLOGY_OPTION_NONE;
1263   return GNUNET_NO;
1264 }
1265
1266 /**
1267  * Function to iterate over options.  Copies
1268  * the options to the target configuration,
1269  * updating PORT values as needed.
1270  *
1271  * @param cls closure
1272  * @param section name of the section
1273  * @param option name of the option
1274  * @param value value of the option
1275  */
1276 static void
1277 update_config(void *cls, const char *section, const char *option,
1278               const char *value)
1279 {
1280   struct UpdateContext *ctx = cls;
1281   unsigned int ival;
1282   char cval[12];
1283   char uval[128];
1284   char *single_variable;
1285   char *per_host_variable;
1286   unsigned long long num_per_host;
1287
1288   GNUNET_asprintf (&single_variable, "single_%s_per_host", section);
1289   GNUNET_asprintf (&per_host_variable, "num_%s_per_host", section);
1290
1291   if ((0 == strcmp (option, "PORT")) && (1 == sscanf (value, "%u", &ival)))
1292     {
1293       if ((ival != 0) && (GNUNET_YES
1294           != GNUNET_CONFIGURATION_get_value_yesno (ctx->orig, "testing",
1295                                                    single_variable)))
1296         {
1297           GNUNET_snprintf (cval, sizeof(cval), "%u", ctx->nport++);
1298           value = cval;
1299         }
1300       else if ((ival != 0) && (GNUNET_YES
1301           == GNUNET_CONFIGURATION_get_value_yesno (ctx->orig, "testing",
1302                                                    single_variable))
1303           && GNUNET_CONFIGURATION_get_value_number (ctx->orig, "testing",
1304                                                     per_host_variable,
1305                                                     &num_per_host))
1306         {
1307           GNUNET_snprintf (cval, sizeof(cval), "%u", ival + ctx->fdnum
1308               % num_per_host);
1309           value = cval;
1310         }
1311     }
1312
1313   if (0 == strcmp (option, "UNIXPATH"))
1314     {
1315       if (GNUNET_YES != GNUNET_CONFIGURATION_get_value_yesno (ctx->orig,
1316                                                               "testing",
1317                                                               single_variable))
1318         {
1319           GNUNET_snprintf (uval, sizeof(uval), "/tmp/test-service-%s-%u",
1320                            section, ctx->upnum++);
1321           value = uval;
1322         }
1323       else if ((GNUNET_YES
1324           == GNUNET_CONFIGURATION_get_value_number (ctx->orig, "testing",
1325                                                     per_host_variable,
1326                                                     &num_per_host))
1327           && (num_per_host > 0))
1328
1329         {
1330           GNUNET_snprintf (uval, sizeof(uval), "/tmp/test-service-%s-%u",
1331                            section, ctx->fdnum % num_per_host);
1332           value = uval;
1333         }
1334     }
1335
1336   if ((0 == strcmp (option, "HOSTNAME")) && (ctx->hostname != NULL))
1337     {
1338       value = ctx->hostname;
1339     }
1340   GNUNET_free (single_variable);
1341   GNUNET_free (per_host_variable);
1342   GNUNET_CONFIGURATION_set_value_string (ctx->ret, section, option, value);
1343 }
1344
1345 /**
1346  * Create a new configuration using the given configuration
1347  * as a template; however, each PORT in the existing cfg
1348  * must be renumbered by incrementing "*port".  If we run
1349  * out of "*port" numbers, return NULL.
1350  *
1351  * @param cfg template configuration
1352  * @param off the current peer offset
1353  * @param port port numbers to use, update to reflect
1354  *             port numbers that were used
1355  * @param upnum number to make unix domain socket names unique
1356  * @param hostname hostname of the controlling host, to allow control connections from
1357  * @param fdnum number used to offset the unix domain socket for grouped processes
1358  *              (such as statistics or peerinfo, which can be shared among others)
1359  *
1360  * @return new configuration, NULL on error
1361  */
1362 static struct GNUNET_CONFIGURATION_Handle *
1363 make_config(const struct GNUNET_CONFIGURATION_Handle *cfg, uint32_t off,
1364             uint16_t * port, uint32_t * upnum, const char *hostname,
1365             uint32_t * fdnum)
1366 {
1367   struct UpdateContext uc;
1368   uint16_t orig;
1369   char *control_host;
1370   char *allowed_hosts;
1371
1372   orig = *port;
1373   uc.nport = *port;
1374   uc.upnum = *upnum;
1375   uc.fdnum = *fdnum;
1376   uc.ret = GNUNET_CONFIGURATION_create ();
1377   uc.hostname = hostname;
1378   uc.orig = cfg;
1379
1380   GNUNET_CONFIGURATION_iterate (cfg, &update_config, &uc);
1381   if (uc.nport >= HIGH_PORT)
1382     {
1383       *port = orig;
1384       GNUNET_CONFIGURATION_destroy (uc.ret);
1385       return NULL;
1386     }
1387
1388   if (GNUNET_CONFIGURATION_get_value_string (cfg, "testing", "control_host",
1389                                              &control_host) == GNUNET_OK)
1390     {
1391       if (hostname != NULL)
1392         GNUNET_asprintf (&allowed_hosts, "%s; 127.0.0.1; %s;", control_host,
1393                          hostname);
1394       else
1395         GNUNET_asprintf (&allowed_hosts, "%s; 127.0.0.1;", control_host);
1396
1397       GNUNET_CONFIGURATION_set_value_string (uc.ret, "core", "ACCEPT_FROM",
1398                                              allowed_hosts);
1399       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport",
1400                                              "ACCEPT_FROM", allowed_hosts);
1401       GNUNET_CONFIGURATION_set_value_string (uc.ret, "dht", "ACCEPT_FROM",
1402                                              allowed_hosts);
1403       GNUNET_CONFIGURATION_set_value_string (uc.ret, "statistics",
1404                                              "ACCEPT_FROM", allowed_hosts);
1405
1406       GNUNET_CONFIGURATION_set_value_string (uc.ret, "core", "UNIXPATH", "");
1407       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport", "UNIXPATH",
1408                                              "");
1409       GNUNET_CONFIGURATION_set_value_string (uc.ret, "dht", "UNIXPATH", "");
1410       GNUNET_CONFIGURATION_set_value_string (uc.ret, "statistics", "UNIXPATH",
1411                                              "");
1412
1413       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "USE_LOCALADDR",
1414                                              "YES");
1415       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "USE_LOCALADDR",
1416                                              "YES");
1417       GNUNET_free_non_null (control_host);
1418       GNUNET_free (allowed_hosts);
1419     }
1420
1421   /* arm needs to know to allow connections from the host on which it is running,
1422    * otherwise gnunet-arm is unable to connect to it in some instances */
1423   if (hostname != NULL)
1424     {
1425       GNUNET_asprintf (&allowed_hosts, "%s; 127.0.0.1;", hostname);
1426       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "BINDTO",
1427                                              hostname);
1428       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "BINDTO",
1429                                              hostname);
1430       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "USE_LOCALADDR",
1431                                              "YES");
1432       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "USE_LOCALADDR",
1433                                              "YES");
1434       GNUNET_CONFIGURATION_set_value_string (uc.ret, "arm", "ACCEPT_FROM",
1435                                              allowed_hosts);
1436       GNUNET_free (allowed_hosts);
1437     }
1438   else
1439     {
1440       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "BINDTO",
1441                                              "127.0.0.1");
1442       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "BINDTO",
1443                                              "127.0.0.1");
1444       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-tcp", "USE_LOCALADDR",
1445                                              "YES");
1446       GNUNET_CONFIGURATION_set_value_string (uc.ret, "transport-udp", "USE_LOCALADDR",
1447                                              "YES");
1448     }
1449
1450   *port = (uint16_t) uc.nport;
1451   *upnum = uc.upnum;
1452   uc.fdnum++;
1453   *fdnum = uc.fdnum;
1454   return uc.ret;
1455 }
1456
1457 /*
1458  * Remove entries from the peer connection list
1459  *
1460  * @param pg the peer group we are working with
1461  * @param first index of the first peer
1462  * @param second index of the second peer
1463  * @param list the peer list to use
1464  * @param check UNUSED
1465  *
1466  * @return the number of connections added (can be 0, 1 or 2)
1467  *
1468  */
1469 static unsigned int
1470 remove_connections(struct GNUNET_TESTING_PeerGroup *pg, unsigned int first,
1471                    unsigned int second, enum PeerLists list, unsigned int check)
1472 {
1473   int removed;
1474 #if OLD
1475   struct PeerConnection **first_list;
1476   struct PeerConnection **second_list;
1477   struct PeerConnection *first_iter;
1478   struct PeerConnection *second_iter;
1479   struct PeerConnection **first_tail;
1480   struct PeerConnection **second_tail;
1481
1482 #else
1483   GNUNET_HashCode hash_first;
1484   GNUNET_HashCode hash_second;
1485
1486   hash_from_uid (first, &hash_first);
1487   hash_from_uid (second, &hash_second);
1488 #endif
1489
1490   removed = 0;
1491 #if OLD
1492   switch (list)
1493     {
1494   case ALLOWED:
1495     first_list = &pg->peers[first].allowed_peers_head;
1496     second_list = &pg->peers[second].allowed_peers_head;
1497     first_tail = &pg->peers[first].allowed_peers_tail;
1498     second_tail = &pg->peers[second].allowed_peers_tail;
1499     break;
1500   case CONNECT:
1501     first_list = &pg->peers[first].connect_peers_head;
1502     second_list = &pg->peers[second].connect_peers_head;
1503     first_tail = &pg->peers[first].connect_peers_tail;
1504     second_tail = &pg->peers[second].connect_peers_tail;
1505     break;
1506   case BLACKLIST:
1507     first_list = &pg->peers[first].blacklisted_peers_head;
1508     second_list = &pg->peers[second].blacklisted_peers_head;
1509     first_tail = &pg->peers[first].blacklisted_peers_tail;
1510     second_tail = &pg->peers[second].blacklisted_peers_tail;
1511     break;
1512   case WORKING_SET:
1513     first_list = &pg->peers[first].connect_peers_working_set_head;
1514     second_list = &pg->peers[second].connect_peers_working_set_head;
1515     first_tail = &pg->peers[first].connect_peers_working_set_tail;
1516     second_tail = &pg->peers[second].connect_peers_working_set_tail;
1517     break;
1518   default:
1519     GNUNET_break(0);
1520     return 0;
1521     }
1522
1523   first_iter = *first_list;
1524   while (first_iter != NULL)
1525     {
1526       if (first_iter->index == second)
1527         {
1528           GNUNET_CONTAINER_DLL_remove(*first_list, *first_tail, first_iter);
1529           GNUNET_free(first_iter);
1530           removed++;
1531           break;
1532         }
1533       first_iter = first_iter->next;
1534     }
1535
1536   second_iter = *second_list;
1537   while (second_iter != NULL)
1538     {
1539       if (second_iter->index == first)
1540         {
1541           GNUNET_CONTAINER_DLL_remove(*second_list, *second_tail, second_iter);
1542           GNUNET_free(second_iter);
1543           removed++;
1544           break;
1545         }
1546       second_iter = second_iter->next;
1547     }
1548 #else
1549   if (GNUNET_YES ==
1550       GNUNET_CONTAINER_multihashmap_contains (pg->peers[first].blacklisted_peers,
1551           &hash_second))
1552     {
1553       GNUNET_CONTAINER_multihashmap_remove_all (pg->peers[first].blacklisted_peers,
1554           &hash_second);
1555     }
1556
1557   if (GNUNET_YES ==
1558       GNUNET_CONTAINER_multihashmap_contains (pg->peers[second].blacklisted_peers,
1559           &hash_first))
1560     {
1561       GNUNET_CONTAINER_multihashmap_remove_all (pg->peers[second].blacklisted_peers,
1562           &hash_first);
1563     }
1564 #endif
1565
1566   return removed;
1567 }
1568
1569 /*
1570  * Add entries to the some list
1571  *
1572  * @param pg the peer group we are working with
1573  * @param first index of the first peer
1574  * @param second index of the second peer
1575  * @param list the list type that we should modify
1576  * @param check GNUNET_YES to check lists before adding
1577  *              GNUNET_NO to force add
1578  *
1579  * @return the number of connections added (can be 0, 1 or 2)
1580  *
1581  */
1582 static unsigned int
1583 add_connections(struct GNUNET_TESTING_PeerGroup *pg, unsigned int first,
1584                 unsigned int second, enum PeerLists list, unsigned int check)
1585 {
1586   int added;
1587   int add_first;
1588   int add_second;
1589
1590   struct PeerConnection **first_list;
1591   struct PeerConnection **second_list;
1592   struct PeerConnection *first_iter;
1593   struct PeerConnection *second_iter;
1594   struct PeerConnection *new_first;
1595   struct PeerConnection *new_second;
1596   struct PeerConnection **first_tail;
1597   struct PeerConnection **second_tail;
1598
1599   switch (list)
1600     {
1601   case ALLOWED:
1602     first_list = &pg->peers[first].allowed_peers_head;
1603     second_list = &pg->peers[second].allowed_peers_head;
1604     first_tail = &pg->peers[first].allowed_peers_tail;
1605     second_tail = &pg->peers[second].allowed_peers_tail;
1606     break;
1607   case CONNECT:
1608     first_list = &pg->peers[first].connect_peers_head;
1609     second_list = &pg->peers[second].connect_peers_head;
1610     first_tail = &pg->peers[first].connect_peers_tail;
1611     second_tail = &pg->peers[second].connect_peers_tail;
1612     break;
1613   case BLACKLIST:
1614     first_list = &pg->peers[first].blacklisted_peers_head;
1615     second_list = &pg->peers[second].blacklisted_peers_head;
1616     first_tail = &pg->peers[first].blacklisted_peers_tail;
1617     second_tail = &pg->peers[second].blacklisted_peers_tail;
1618     break;
1619   case WORKING_SET:
1620     first_list = &pg->peers[first].connect_peers_working_set_head;
1621     second_list = &pg->peers[second].connect_peers_working_set_head;
1622     first_tail = &pg->peers[first].connect_peers_working_set_tail;
1623     second_tail = &pg->peers[second].connect_peers_working_set_tail;
1624     break;
1625   default:
1626     GNUNET_break(0);
1627     return 0;
1628     }
1629
1630   add_first = GNUNET_YES;
1631   add_second = GNUNET_YES;
1632
1633   if (check == GNUNET_YES)
1634     {
1635       first_iter = *first_list;
1636       while (first_iter != NULL)
1637         {
1638           if (first_iter->index == second)
1639             {
1640               add_first = GNUNET_NO;
1641               break;
1642             }
1643           first_iter = first_iter->next;
1644         }
1645
1646       second_iter = *second_list;
1647       while (second_iter != NULL)
1648         {
1649           if (second_iter->index == first)
1650             {
1651               add_second = GNUNET_NO;
1652               break;
1653             }
1654           second_iter = second_iter->next;
1655         }
1656     }
1657
1658   added = 0;
1659   if (add_first)
1660     {
1661       new_first = GNUNET_malloc (sizeof (struct PeerConnection));
1662       new_first->index = second;
1663       GNUNET_CONTAINER_DLL_insert(*first_list, *first_tail, new_first);
1664       pg->peers[first].num_connections++;
1665       added++;
1666     }
1667
1668   if (add_second)
1669     {
1670       new_second = GNUNET_malloc (sizeof (struct PeerConnection));
1671       new_second->index = first;
1672       GNUNET_CONTAINER_DLL_insert(*second_list, *second_tail, new_second);
1673       pg->peers[second].num_connections++;
1674       added++;
1675     }
1676
1677   return added;
1678 }
1679
1680 /**
1681  * Scale free network construction as described in:
1682  *
1683  * "Emergence of Scaling in Random Networks." Science 286, 509-512, 1999.
1684  *
1685  * Start with a network of "one" peer, then progressively add
1686  * peers up to the total number.  At each step, iterate over
1687  * all possible peers and connect new peer based on number of
1688  * existing connections of the target peer.
1689  *
1690  * @param pg the peer group we are dealing with
1691  * @param proc the connection processor to use
1692  * @param list the peer list to use
1693  *
1694  * @return the number of connections created
1695  */
1696 static unsigned int
1697 create_scale_free(struct GNUNET_TESTING_PeerGroup *pg,
1698                   GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
1699 {
1700
1701   unsigned int total_connections;
1702   unsigned int outer_count;
1703   unsigned int i;
1704   unsigned int previous_total_connections;
1705   double random;
1706   double probability;
1707
1708   GNUNET_assert (pg->total > 1);
1709
1710   /* Add a connection between the first two nodes */
1711   total_connections = proc (pg, 0, 1, list, GNUNET_YES);
1712
1713   for (outer_count = 1; outer_count < pg->total; outer_count++)
1714     {
1715       previous_total_connections = total_connections;
1716       for (i = 0; i < outer_count; i++)
1717         {
1718           probability = pg->peers[i].num_connections
1719               / (double) previous_total_connections;
1720           random
1721               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
1722                                                     UINT64_MAX))
1723                   / ((double) UINT64_MAX);
1724 #if VERBOSE_TESTING
1725           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1726               "Considering connecting peer %d to peer %d\n",
1727               outer_count, i);
1728 #endif
1729           if (random < probability)
1730             {
1731 #if VERBOSE_TESTING
1732               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1733                   "Connecting peer %d to peer %d\n", outer_count, i);
1734 #endif
1735               total_connections += proc (pg, outer_count, i, list, GNUNET_YES);
1736             }
1737         }
1738     }
1739
1740   return total_connections;
1741 }
1742
1743 /**
1744  * Create a topology given a peer group (set of running peers)
1745  * and a connection processor.  Creates a small world topology
1746  * according to the rewired ring construction.  The basic
1747  * behavior is that a ring topology is created, but with some
1748  * probability instead of connecting a peer to the next
1749  * neighbor in the ring a connection will be created to a peer
1750  * selected uniformly at random.   We use the TESTING
1751  * PERCENTAGE option to specify what number of
1752  * connections each peer should have.  Default is 2,
1753  * which makes the ring, any given number is multiplied by
1754  * the log of the network size; i.e. a PERCENTAGE of 2 makes
1755  * each peer have on average 2logn connections.  The additional
1756  * connections are made at increasing distance around the ring
1757  * from the original peer, or to random peers based on the re-
1758  * wiring probability. The TESTING
1759  * PROBABILITY option is used as the probability that a given
1760  * connection is rewired.
1761  *
1762  * @param pg the peergroup to create the topology on
1763  * @param proc the connection processor to call to actually set
1764  *        up connections between two peers
1765  * @param list the peer list to use
1766  *
1767  * @return the number of connections that were set up
1768  *
1769  */
1770 static unsigned int
1771 create_small_world_ring(struct GNUNET_TESTING_PeerGroup *pg,
1772                         GNUNET_TESTING_ConnectionProcessor proc,
1773                         enum PeerLists list)
1774 {
1775   unsigned int i, j;
1776   int nodeToConnect;
1777   unsigned int natLog;
1778   unsigned int randomPeer;
1779   double random, logNModifier, probability;
1780   unsigned int smallWorldConnections;
1781   int connsPerPeer;
1782   char *p_string;
1783   int max;
1784   int min;
1785   unsigned int useAnd;
1786   int connect_attempts;
1787
1788   logNModifier = 0.5; /* FIXME: default value? */
1789   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1790                                                           "PERCENTAGE",
1791                                                           &p_string))
1792     {
1793       if (sscanf (p_string, "%lf", &logNModifier) != 1)
1794         GNUNET_log (
1795                     GNUNET_ERROR_TYPE_WARNING,
1796                     _
1797                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1798                     p_string, "LOGNMODIFIER", "TESTING");
1799       GNUNET_free (p_string);
1800     }
1801   probability = 0.5; /* FIXME: default percentage? */
1802   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1803                                                           "PROBABILITY",
1804                                                           &p_string))
1805     {
1806       if (sscanf (p_string, "%lf", &probability) != 1)
1807         GNUNET_log (
1808                     GNUNET_ERROR_TYPE_WARNING,
1809                     _
1810                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1811                     p_string, "PERCENTAGE", "TESTING");
1812       GNUNET_free (p_string);
1813     }
1814   natLog = log (pg->total);
1815   connsPerPeer = ceil (natLog * logNModifier);
1816
1817   if (connsPerPeer % 2 == 1)
1818     connsPerPeer += 1;
1819
1820   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Target is %d connections per peer."),
1821               connsPerPeer);
1822
1823   smallWorldConnections = 0;
1824   connect_attempts = 0;
1825   for (i = 0; i < pg->total; i++)
1826     {
1827       useAnd = 0;
1828       max = i + connsPerPeer / 2;
1829       min = i - connsPerPeer / 2;
1830
1831       if (max > pg->total - 1)
1832         {
1833           max = max - pg->total;
1834           useAnd = 1;
1835         }
1836
1837       if (min < 0)
1838         {
1839           min = pg->total - 1 + min;
1840           useAnd = 1;
1841         }
1842
1843       for (j = 0; j < connsPerPeer / 2; j++)
1844         {
1845           random
1846               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
1847                                                     UINT64_MAX)
1848                   / ((double) UINT64_MAX));
1849           if (random < probability)
1850             {
1851               /* Connect to uniformly selected random peer */
1852               randomPeer
1853                   = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1854                                               pg->total);
1855               while ((((randomPeer < max) && (randomPeer > min)) && (useAnd
1856                   == 0)) || (((randomPeer > min) || (randomPeer < max))
1857                   && (useAnd == 1)))
1858                 {
1859                   randomPeer
1860                       = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
1861                                                   pg->total);
1862                 }
1863               smallWorldConnections += proc (pg, i, randomPeer, list,
1864                                              GNUNET_YES);
1865             }
1866           else
1867             {
1868               nodeToConnect = i + j + 1;
1869               if (nodeToConnect > pg->total - 1)
1870                 {
1871                   nodeToConnect = nodeToConnect - pg->total;
1872                 }
1873               connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
1874             }
1875         }
1876
1877     }
1878
1879   connect_attempts += smallWorldConnections;
1880
1881   return connect_attempts;
1882 }
1883
1884 /**
1885  * Create a topology given a peer group (set of running peers)
1886  * and a connection processor.
1887  *
1888  * @param pg the peergroup to create the topology on
1889  * @param proc the connection processor to call to actually set
1890  *        up connections between two peers
1891  * @param list the peer list to use
1892  *
1893  * @return the number of connections that were set up
1894  *
1895  */
1896 static unsigned int
1897 create_nated_internet(struct GNUNET_TESTING_PeerGroup *pg,
1898                       GNUNET_TESTING_ConnectionProcessor proc,
1899                       enum PeerLists list)
1900 {
1901   unsigned int outer_count, inner_count;
1902   unsigned int cutoff;
1903   int connect_attempts;
1904   double nat_percentage;
1905   char *p_string;
1906
1907   nat_percentage = 0.6; /* FIXME: default percentage? */
1908   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1909                                                           "PERCENTAGE",
1910                                                           &p_string))
1911     {
1912       if (sscanf (p_string, "%lf", &nat_percentage) != 1)
1913         GNUNET_log (
1914                     GNUNET_ERROR_TYPE_WARNING,
1915                     _
1916                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1917                     p_string, "PERCENTAGE", "TESTING");
1918       GNUNET_free (p_string);
1919     }
1920
1921   cutoff = (unsigned int) (nat_percentage * pg->total);
1922   connect_attempts = 0;
1923   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
1924     {
1925       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
1926         {
1927           if ((outer_count > cutoff) || (inner_count > cutoff))
1928             {
1929 #if VERBOSE_TESTING
1930               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1931                   "Connecting peer %d to peer %d\n",
1932                   outer_count, inner_count);
1933 #endif
1934               connect_attempts += proc (pg, outer_count, inner_count, list,
1935                                         GNUNET_YES);
1936             }
1937         }
1938     }
1939   return connect_attempts;
1940 }
1941
1942 #if TOPOLOGY_HACK
1943 /**
1944  * Create a topology given a peer group (set of running peers)
1945  * and a connection processor.
1946  *
1947  * @param pg the peergroup to create the topology on
1948  * @param proc the connection processor to call to actually set
1949  *        up connections between two peers
1950  * @param list the peer list to use
1951  *
1952  * @return the number of connections that were set up
1953  *
1954  */
1955 static unsigned int
1956 create_nated_internet_copy(struct GNUNET_TESTING_PeerGroup *pg,
1957                            GNUNET_TESTING_ConnectionProcessor proc,
1958                            enum PeerLists list)
1959 {
1960   unsigned int outer_count, inner_count;
1961   unsigned int cutoff;
1962   int connect_attempts;
1963   double nat_percentage;
1964   char *p_string;
1965   unsigned int count;
1966   struct ProgressMeter *conn_meter;
1967
1968   nat_percentage = 0.6; /* FIXME: default percentage? */
1969   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
1970                                                           "PERCENTAGE",
1971                                                           &p_string))
1972     {
1973       if (sscanf (p_string, "%lf", &nat_percentage) != 1)
1974         GNUNET_log (
1975                     GNUNET_ERROR_TYPE_WARNING,
1976                     _
1977                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
1978                     p_string, "PERCENTAGE", "TESTING");
1979       GNUNET_free (p_string);
1980     }
1981
1982   cutoff = (unsigned int) (nat_percentage * pg->total);
1983   count = 0;
1984   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
1985     {
1986       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
1987         {
1988           if ((outer_count > cutoff) || (inner_count > cutoff))
1989             {
1990               count++;
1991             }
1992         }
1993     }
1994   conn_meter = create_meter (count, "NAT COPY", GNUNET_YES);
1995   connect_attempts = 0;
1996   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
1997     {
1998       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
1999         {
2000           if ((outer_count > cutoff) || (inner_count > cutoff))
2001             {
2002 #if VERBOSE_TESTING
2003               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2004                   "Connecting peer %d to peer %d\n",
2005                   outer_count, inner_count);
2006 #endif
2007               connect_attempts += proc (pg, outer_count, inner_count, list,
2008                                         GNUNET_YES);
2009               add_connections (pg, outer_count, inner_count, ALLOWED, GNUNET_NO);
2010               update_meter (conn_meter);
2011             }
2012         }
2013     }
2014   free_meter (conn_meter);
2015
2016   return connect_attempts;
2017 }
2018 #endif
2019
2020 /**
2021  * Create a topology given a peer group (set of running peers)
2022  * and a connection processor.
2023  *
2024  * @param pg the peergroup to create the topology on
2025  * @param proc the connection processor to call to actually set
2026  *        up connections between two peers
2027  * @param list the peer list to use
2028  *
2029  * @return the number of connections that were set up
2030  *
2031  */
2032 static unsigned int
2033 create_small_world(struct GNUNET_TESTING_PeerGroup *pg,
2034                    GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2035 {
2036   unsigned int i, j, k;
2037   unsigned int square;
2038   unsigned int rows;
2039   unsigned int cols;
2040   unsigned int toggle = 1;
2041   unsigned int nodeToConnect;
2042   unsigned int natLog;
2043   unsigned int node1Row;
2044   unsigned int node1Col;
2045   unsigned int node2Row;
2046   unsigned int node2Col;
2047   unsigned int distance;
2048   double probability, random, percentage;
2049   unsigned int smallWorldConnections;
2050   unsigned int small_world_it;
2051   char *p_string;
2052   int connect_attempts;
2053   square = floor (sqrt (pg->total));
2054   rows = square;
2055   cols = square;
2056
2057   percentage = 0.5; /* FIXME: default percentage? */
2058   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
2059                                                           "PERCENTAGE",
2060                                                           &p_string))
2061     {
2062       if (sscanf (p_string, "%lf", &percentage) != 1)
2063         GNUNET_log (
2064                     GNUNET_ERROR_TYPE_WARNING,
2065                     _
2066                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
2067                     p_string, "PERCENTAGE", "TESTING");
2068       GNUNET_free (p_string);
2069     }
2070   if (percentage < 0.0)
2071     {
2072       GNUNET_log (
2073                   GNUNET_ERROR_TYPE_WARNING,
2074                   _
2075                   ("Invalid value `%s' for option `%s' in section `%s': got %f, needed value greater than 0\n"),
2076                   "PERCENTAGE", "TESTING", percentage);
2077       percentage = 0.5;
2078     }
2079   probability = 0.5; /* FIXME: default percentage? */
2080   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
2081                                                           "PROBABILITY",
2082                                                           &p_string))
2083     {
2084       if (sscanf (p_string, "%lf", &probability) != 1)
2085         GNUNET_log (
2086                     GNUNET_ERROR_TYPE_WARNING,
2087                     _
2088                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
2089                     p_string, "PROBABILITY", "TESTING");
2090       GNUNET_free (p_string);
2091     }
2092   if (square * square != pg->total)
2093     {
2094       while (rows * cols < pg->total)
2095         {
2096           if (toggle % 2 == 0)
2097             rows++;
2098           else
2099             cols++;
2100
2101           toggle++;
2102         }
2103     }
2104 #if VERBOSE_TESTING
2105   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2106       _
2107       ("Connecting nodes in 2d torus topology: %u rows %u columns\n"),
2108       rows, cols);
2109 #endif
2110
2111   connect_attempts = 0;
2112   /* Rows and columns are all sorted out, now iterate over all nodes and connect each
2113    * to the node to its right and above.  Once this is over, we'll have our torus!
2114    * Special case for the last node (if the rows and columns are not equal), connect
2115    * to the first in the row to maintain topology.
2116    */
2117   for (i = 0; i < pg->total; i++)
2118     {
2119       /* First connect to the node to the right */
2120       if (((i + 1) % cols != 0) && (i + 1 != pg->total))
2121         nodeToConnect = i + 1;
2122       else if (i + 1 == pg->total)
2123         nodeToConnect = rows * cols - cols;
2124       else
2125         nodeToConnect = i - cols + 1;
2126
2127       connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2128
2129       if (i < cols)
2130         {
2131           nodeToConnect = (rows * cols) - cols + i;
2132           if (nodeToConnect >= pg->total)
2133             nodeToConnect -= cols;
2134         }
2135       else
2136         nodeToConnect = i - cols;
2137
2138       if (nodeToConnect < pg->total)
2139         connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2140     }
2141   natLog = log (pg->total);
2142 #if VERBOSE_TESTING > 2
2143   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2144       _("natural log of %d is %d, will run %d iterations\n"),
2145       pg->total, natLog, (int) (natLog * percentage));
2146   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2147       _("Total connections added thus far: %u!\n"), connect_attempts);
2148 #endif
2149   smallWorldConnections = 0;
2150   small_world_it = (unsigned int) (natLog * percentage);
2151   if (small_world_it < 1)
2152     small_world_it = 1;
2153   GNUNET_assert (small_world_it > 0 && small_world_it < (unsigned int) -1);
2154   for (i = 0; i < small_world_it; i++)
2155     {
2156       for (j = 0; j < pg->total; j++)
2157         {
2158           /* Determine the row and column of node at position j on the 2d torus */
2159           node1Row = j / cols;
2160           node1Col = j - (node1Row * cols);
2161           for (k = 0; k < pg->total; k++)
2162             {
2163               /* Determine the row and column of node at position k on the 2d torus */
2164               node2Row = k / cols;
2165               node2Col = k - (node2Row * cols);
2166               /* Simple Cartesian distance */
2167               distance = abs (node1Row - node2Row) + abs (node1Col - node2Col);
2168               if (distance > 1)
2169                 {
2170                   /* Calculate probability as 1 over the square of the distance */
2171                   probability = 1.0 / (distance * distance);
2172                   /* Choose a random value between 0 and 1 */
2173                   random
2174                       = ((double) GNUNET_CRYPTO_random_u64 (
2175                                                             GNUNET_CRYPTO_QUALITY_WEAK,
2176                                                             UINT64_MAX))
2177                           / ((double) UINT64_MAX);
2178                   /* If random < probability, then connect the two nodes */
2179                   if (random < probability)
2180                     smallWorldConnections += proc (pg, j, k, list, GNUNET_YES);
2181
2182                 }
2183             }
2184         }
2185     }
2186   connect_attempts += smallWorldConnections;
2187 #if VERBOSE_TESTING > 2
2188   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2189       _("Total connections added for small world: %d!\n"),
2190       smallWorldConnections);
2191 #endif
2192   return connect_attempts;
2193 }
2194
2195 /**
2196  * Create a topology given a peer group (set of running peers)
2197  * and a connection processor.
2198  *
2199  * @param pg the peergroup to create the topology on
2200  * @param proc the connection processor to call to actually set
2201  *        up connections between two peers
2202  * @param list the peer list to use
2203  *
2204  * @return the number of connections that were set up
2205  *
2206  */
2207 static unsigned int
2208 create_erdos_renyi(struct GNUNET_TESTING_PeerGroup *pg,
2209                    GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2210 {
2211   double temp_rand;
2212   unsigned int outer_count;
2213   unsigned int inner_count;
2214   int connect_attempts;
2215   double probability;
2216   char *p_string;
2217
2218   probability = 0.5; /* FIXME: default percentage? */
2219   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "TESTING",
2220                                                           "PROBABILITY",
2221                                                           &p_string))
2222     {
2223       if (sscanf (p_string, "%lf", &probability) != 1)
2224         GNUNET_log (
2225                     GNUNET_ERROR_TYPE_WARNING,
2226                     _
2227                     ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
2228                     p_string, "PROBABILITY", "TESTING");
2229       GNUNET_free (p_string);
2230     }
2231   connect_attempts = 0;
2232   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
2233     {
2234       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
2235         {
2236           temp_rand
2237               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
2238                                                     UINT64_MAX))
2239                   / ((double) UINT64_MAX);
2240 #if VERBOSE_TESTING
2241           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2242               _("rand is %f probability is %f\n"), temp_rand,
2243               probability);
2244 #endif
2245           if (temp_rand < probability)
2246             {
2247               connect_attempts += proc (pg, outer_count, inner_count, list,
2248                                         GNUNET_YES);
2249             }
2250         }
2251     }
2252
2253   return connect_attempts;
2254 }
2255
2256 /**
2257  * Create a topology given a peer group (set of running peers)
2258  * and a connection processor.  This particular function creates
2259  * the connections for a 2d-torus, plus additional "closest"
2260  * connections per peer.
2261  *
2262  * @param pg the peergroup to create the topology on
2263  * @param proc the connection processor to call to actually set
2264  *        up connections between two peers
2265  * @param list the peer list to use
2266  *
2267  * @return the number of connections that were set up
2268  *
2269  */
2270 static unsigned int
2271 create_2d_torus(struct GNUNET_TESTING_PeerGroup *pg,
2272                 GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2273 {
2274   unsigned int i;
2275   unsigned int square;
2276   unsigned int rows;
2277   unsigned int cols;
2278   unsigned int toggle = 1;
2279   unsigned int nodeToConnect;
2280   int connect_attempts;
2281
2282   connect_attempts = 0;
2283
2284   square = floor (sqrt (pg->total));
2285   rows = square;
2286   cols = square;
2287
2288   if (square * square != pg->total)
2289     {
2290       while (rows * cols < pg->total)
2291         {
2292           if (toggle % 2 == 0)
2293             rows++;
2294           else
2295             cols++;
2296
2297           toggle++;
2298         }
2299     }
2300 #if VERBOSE_TESTING
2301   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2302       _
2303       ("Connecting nodes in 2d torus topology: %u rows %u columns\n"),
2304       rows, cols);
2305 #endif
2306   /* Rows and columns are all sorted out, now iterate over all nodes and connect each
2307    * to the node to its right and above.  Once this is over, we'll have our torus!
2308    * Special case for the last node (if the rows and columns are not equal), connect
2309    * to the first in the row to maintain topology.
2310    */
2311   for (i = 0; i < pg->total; i++)
2312     {
2313       /* First connect to the node to the right */
2314       if (((i + 1) % cols != 0) && (i + 1 != pg->total))
2315         nodeToConnect = i + 1;
2316       else if (i + 1 == pg->total)
2317         nodeToConnect = rows * cols - cols;
2318       else
2319         nodeToConnect = i - cols + 1;
2320 #if VERBOSE_TESTING
2321       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2322           "Connecting peer %d to peer %d\n", i, nodeToConnect);
2323 #endif
2324       connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2325
2326       /* Second connect to the node immediately above */
2327       if (i < cols)
2328         {
2329           nodeToConnect = (rows * cols) - cols + i;
2330           if (nodeToConnect >= pg->total)
2331             nodeToConnect -= cols;
2332         }
2333       else
2334         nodeToConnect = i - cols;
2335
2336       if (nodeToConnect < pg->total)
2337         {
2338 #if VERBOSE_TESTING
2339           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2340               "Connecting peer %d to peer %d\n", i, nodeToConnect);
2341 #endif
2342           connect_attempts += proc (pg, i, nodeToConnect, list, GNUNET_YES);
2343         }
2344
2345     }
2346
2347   return connect_attempts;
2348 }
2349
2350 /**
2351  * Create a topology given a peer group (set of running peers)
2352  * and a connection processor.
2353  *
2354  * @param pg the peergroup to create the topology on
2355  * @param proc the connection processor to call to actually set
2356  *        up connections between two peers
2357  * @param list the peer list to use
2358  * @param check does the connection processor need to check before
2359  *              performing an action on the list?
2360  *
2361  * @return the number of connections that were set up
2362  *
2363  */
2364 static unsigned int
2365 create_clique(struct GNUNET_TESTING_PeerGroup *pg,
2366               GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list,
2367               unsigned int check)
2368 {
2369   unsigned int outer_count;
2370   unsigned int inner_count;
2371   int connect_attempts;
2372   struct ProgressMeter *conn_meter;
2373   connect_attempts = 0;
2374
2375   conn_meter = create_meter ((((pg->total * pg->total) + pg->total) / 2)
2376       - pg->total, "Create Clique ", GNUNET_NO);
2377   for (outer_count = 0; outer_count < pg->total - 1; outer_count++)
2378     {
2379       for (inner_count = outer_count + 1; inner_count < pg->total; inner_count++)
2380         {
2381 #if VERBOSE_TESTING
2382           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2383               "Connecting peer %d to peer %d\n",
2384               outer_count, inner_count);
2385 #endif
2386           connect_attempts += proc (pg, outer_count, inner_count, list, check);
2387           update_meter (conn_meter);
2388         }
2389     }
2390   reset_meter (conn_meter);
2391   free_meter (conn_meter);
2392   return connect_attempts;
2393 }
2394
2395 #if !OLD
2396 /**
2397  * Iterator over hash map entries.
2398  *
2399  * @param cls closure the peer group
2400  * @param key the key stored in the hashmap is the
2401  *            index of the peer to connect to
2402  * @param value value in the hash map, handle to the peer daemon
2403  * @return GNUNET_YES if we should continue to
2404  *         iterate,
2405  *         GNUNET_NO if not.
2406  */
2407 static int
2408 unblacklist_iterator (void *cls,
2409     const GNUNET_HashCode * key,
2410     void *value)
2411   {
2412     struct UnblacklistContext *un_ctx = cls;
2413     uint32_t second_pos;
2414
2415     uid_from_hash (key, &second_pos);
2416
2417     unblacklist_connections(un_ctx->pg, un_ctx->first_uid, second_pos);
2418
2419     return GNUNET_YES;
2420   }
2421 #endif
2422
2423 /**
2424  * Create a blacklist topology based on the allowed topology
2425  * which disallows any connections not in the allowed topology
2426  * at the transport level.
2427  *
2428  * @param pg the peergroup to create the topology on
2429  * @param proc the connection processor to call to allow
2430  *        up connections between two peers
2431  *
2432  * @return the number of connections that were set up
2433  *
2434  */
2435 static unsigned int
2436 copy_allowed(struct GNUNET_TESTING_PeerGroup *pg,
2437              GNUNET_TESTING_ConnectionProcessor proc)
2438 {
2439   unsigned int count;
2440   unsigned int total;
2441   struct PeerConnection *iter;
2442 #if !OLD
2443   struct UnblacklistContext un_ctx;
2444
2445   un_ctx.pg = pg;
2446 #endif
2447   total = 0;
2448   for (count = 0; count < pg->total - 1; count++)
2449     {
2450 #if OLD
2451       iter = pg->peers[count].allowed_peers_head;
2452       while (iter != NULL)
2453         {
2454           remove_connections (pg, count, iter->index, BLACKLIST, GNUNET_YES);
2455           //unblacklist_connections(pg, count, iter->index);
2456           iter = iter->next;
2457         }
2458 #else
2459       un_ctx.first_uid = count;
2460       total += GNUNET_CONTAINER_multihashmap_iterate(pg->peers[count].allowed_peers,
2461                                                      &unblacklist_iterator,
2462                                                      &un_ctx);
2463 #endif
2464     }
2465   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2466               "Unblacklisted %u peers\n",
2467               total);
2468   return total;
2469 }
2470
2471 /**
2472  * Create a topology given a peer group (set of running peers)
2473  * and a connection processor.
2474  *
2475  * @param pg the peergroup to create the topology on
2476  * @param proc the connection processor to call to actually set
2477  *        up connections between two peers
2478  * @param list which list should be modified
2479  *
2480  * @return the number of connections that were set up
2481  *
2482  */
2483 static unsigned int
2484 create_line(struct GNUNET_TESTING_PeerGroup *pg,
2485             GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2486 {
2487   unsigned int count;
2488   unsigned int connect_attempts;
2489
2490   connect_attempts = 0;
2491   /* Connect each peer to the next highest numbered peer */
2492   for (count = 0; count < pg->total - 1; count++)
2493     {
2494 #if VERBOSE_TESTING
2495       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2496                   "Connecting peer %d to peer %d\n",
2497                   count, count + 1);
2498 #endif
2499       connect_attempts += proc (pg, count, count + 1, list, GNUNET_YES);
2500     }
2501
2502   return connect_attempts;
2503 }
2504
2505 /**
2506  * Create a topology given a peer group (set of running peers)
2507  * and a connection processor.
2508  *
2509  * @param pg the peergroup to create the topology on
2510  * @param filename the file to read topology information from
2511  * @param proc the connection processor to call to actually set
2512  *        up connections between two peers
2513  * @param list the peer list to use
2514  *
2515  * @return the number of connections that were set up
2516  *
2517  */
2518 static unsigned int
2519 create_from_file(struct GNUNET_TESTING_PeerGroup *pg, char *filename,
2520                  GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2521 {
2522   int connect_attempts;
2523   unsigned int first_peer_index;
2524   unsigned int second_peer_index;
2525   struct stat frstat;
2526   int count;
2527   char *data;
2528   const char *buf;
2529   unsigned int total_peers;
2530   enum States curr_state;
2531
2532   connect_attempts = 0;
2533   if (GNUNET_OK != GNUNET_DISK_file_test (filename))
2534     GNUNET_DISK_fn_write (filename, NULL, 0, GNUNET_DISK_PERM_USER_READ);
2535
2536   if ((0 != STAT (filename, &frstat)) || (frstat.st_size == 0))
2537     {
2538       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2539                   "Could not open file `%s' specified for topology!", filename);
2540       return connect_attempts;
2541     }
2542
2543   data = GNUNET_malloc_large (frstat.st_size);
2544   GNUNET_assert(data != NULL);
2545   if (frstat.st_size != GNUNET_DISK_fn_read (filename, data, frstat.st_size))
2546     {
2547       GNUNET_log (
2548                   GNUNET_ERROR_TYPE_ERROR,
2549                   "Could not read file %s specified for host list, ending test!",
2550                   filename);
2551       GNUNET_free (data);
2552       return connect_attempts;
2553     }
2554
2555   buf = data;
2556   count = 0;
2557   first_peer_index = 0;
2558   /* First line should contain a single integer, specifying the number of peers */
2559   /* Each subsequent line should contain this format PEER_INDEX:OTHER_PEER_INDEX[,...] */
2560   curr_state = NUM_PEERS;
2561   while (count < frstat.st_size - 1)
2562     {
2563       if ((buf[count] == '\n') || (buf[count] == ' '))
2564         {
2565           count++;
2566           continue;
2567         }
2568
2569       switch (curr_state)
2570         {
2571         case NUM_PEERS:
2572           errno = 0;
2573           total_peers = strtoul(&buf[count], NULL, 10);
2574           if (errno != 0)
2575             {
2576               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2577                           "Failed to read number of peers from topology file!\n");
2578               GNUNET_free (data);
2579               return connect_attempts;
2580             }
2581           GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2582                       "Read %u total peers in topology\n", total_peers);
2583           GNUNET_assert(total_peers == pg->total);
2584           curr_state = PEER_INDEX;
2585           while ((buf[count] != '\n') && (count < frstat.st_size - 1))
2586             count++;
2587           count++;
2588           break;
2589         case PEER_INDEX:
2590           errno = 0;
2591           first_peer_index = strtoul(&buf[count], NULL, 10);
2592           if (errno != 0)
2593             {
2594               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2595                           "Failed to read peer index from topology file!\n");
2596               GNUNET_free (data);
2597               return connect_attempts;
2598             }
2599           while ((buf[count] != ':') && (count < frstat.st_size - 1))
2600             count++;
2601           count++;
2602           curr_state = OTHER_PEER_INDEX;
2603           break;
2604         case COLON:
2605           if (1 == sscanf (&buf[count], ":"))
2606             curr_state = OTHER_PEER_INDEX;
2607           count++;
2608           break;
2609         case OTHER_PEER_INDEX:
2610           errno = 0;
2611           second_peer_index = strtoul(&buf[count], NULL, 10);
2612           if (errno != 0)
2613             {
2614               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2615                           "Failed to peer index from topology file!\n");
2616               GNUNET_free (data);
2617               return connect_attempts;
2618             }
2619           /* Assume file is written with first peer 1, but array index is 0 */
2620           connect_attempts += proc (pg, first_peer_index - 1, second_peer_index
2621                                     - 1, list, GNUNET_YES);
2622           while ((buf[count] != '\n') && (buf[count] != ',') && (count
2623                                                                  < frstat.st_size - 1))
2624             count++;
2625           if (buf[count] == '\n')
2626             {
2627               curr_state = PEER_INDEX;
2628             }
2629           else if (buf[count] != ',')
2630             {
2631               curr_state = OTHER_PEER_INDEX;
2632             }
2633           count++;
2634           break;
2635         default:
2636           GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2637                       "Found bad data in topology file while in state %d!\n",
2638                       curr_state);
2639           GNUNET_break(0);
2640           GNUNET_free (data);
2641           return connect_attempts;
2642         }
2643     }
2644   GNUNET_free (data);
2645   return connect_attempts;
2646 }
2647
2648 /**
2649  * Create a topology given a peer group (set of running peers)
2650  * and a connection processor.
2651  *
2652  * @param pg the peergroup to create the topology on
2653  * @param proc the connection processor to call to actually set
2654  *        up connections between two peers
2655  * @param list the peer list to use
2656  *
2657  * @return the number of connections that were set up
2658  *
2659  */
2660 static unsigned int
2661 create_ring(struct GNUNET_TESTING_PeerGroup *pg,
2662             GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
2663 {
2664   unsigned int count;
2665   int connect_attempts;
2666
2667   connect_attempts = 0;
2668
2669   /* Connect each peer to the next highest numbered peer */
2670   for (count = 0; count < pg->total - 1; count++)
2671     {
2672 #if VERBOSE_TESTING
2673       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2674           "Connecting peer %d to peer %d\n", count, count + 1);
2675 #endif
2676       connect_attempts += proc (pg, count, count + 1, list, GNUNET_YES);
2677     }
2678
2679   /* Connect the last peer to the first peer */
2680   connect_attempts += proc (pg, pg->total - 1, 0, list, GNUNET_YES);
2681
2682   return connect_attempts;
2683 }
2684
2685 #if !OLD
2686 /**
2687  * Iterator for writing friends of a peer to a file.
2688  *
2689  * @param cls closure, an open writable file handle
2690  * @param key the key the daemon was stored under
2691  * @param value the GNUNET_TESTING_Daemon that needs to be written.
2692  *
2693  * @return GNUNET_YES to continue iteration
2694  *
2695  * TODO: Could replace friend_file_iterator and blacklist_file_iterator
2696  *       with a single file_iterator that takes a closure which contains
2697  *       the prefix to write before the peer.  Then this could be used
2698  *       for blacklisting multiple transports and writing the friend
2699  *       file.  I'm sure *someone* will complain loudly about other
2700  *       things that negate these functions even existing so no point in
2701  *       "fixing" now.
2702  */
2703 static int
2704 friend_file_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2705   {
2706     FILE *temp_friend_handle = cls;
2707     struct GNUNET_TESTING_Daemon *peer = value;
2708     struct GNUNET_PeerIdentity *temppeer;
2709     struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2710
2711     temppeer = &peer->id;
2712     GNUNET_CRYPTO_hash_to_enc (&temppeer->hashPubKey, &peer_enc);
2713     fprintf (temp_friend_handle, "%s\n", (char *) &peer_enc);
2714
2715     return GNUNET_YES;
2716   }
2717
2718 struct BlacklistContext
2719   {
2720     /*
2721      * The (open) file handle to write to
2722      */
2723     FILE *temp_file_handle;
2724
2725     /*
2726      * The transport that this peer will be blacklisted on.
2727      */
2728     char *transport;
2729   };
2730
2731 /**
2732  * Iterator for writing blacklist data to appropriate files.
2733  *
2734  * @param cls closure, an open writable file handle
2735  * @param key the key the daemon was stored under
2736  * @param value the GNUNET_TESTING_Daemon that needs to be written.
2737  *
2738  * @return GNUNET_YES to continue iteration
2739  */
2740 static int
2741 blacklist_file_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2742   {
2743     struct BlacklistContext *blacklist_ctx = cls;
2744     struct GNUNET_TESTING_Daemon *peer = value;
2745     struct GNUNET_PeerIdentity *temppeer;
2746     struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2747
2748     temppeer = &peer->id;
2749     GNUNET_CRYPTO_hash_to_enc (&temppeer->hashPubKey, &peer_enc);
2750     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Writing entry %s:%s to file\n", blacklist_ctx->transport, (char *) &peer_enc);
2751     fprintf (blacklist_ctx->temp_file_handle, "%s:%s\n",
2752         blacklist_ctx->transport, (char *) &peer_enc);
2753
2754     return GNUNET_YES;
2755   }
2756 #endif
2757
2758 /*
2759  * Create the friend files based on the PeerConnection's
2760  * of each peer in the peer group, and copy the files
2761  * to the appropriate place
2762  *
2763  * @param pg the peer group we are dealing with
2764  */
2765 static int
2766 create_and_copy_friend_files(struct GNUNET_TESTING_PeerGroup *pg)
2767 {
2768   FILE *temp_friend_handle;
2769   unsigned int pg_iter;
2770   char *temp_service_path;
2771   struct GNUNET_OS_Process **procarr;
2772   char *arg;
2773   char *mytemp;
2774 #if NOT_STUPID
2775   enum GNUNET_OS_ProcessStatusType type;
2776   unsigned long return_code;
2777   int count;
2778   int max_wait = 10;
2779 #endif
2780   int ret;
2781
2782   ret = GNUNET_OK;
2783 #if OLD
2784   struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2785   struct PeerConnection *conn_iter;
2786 #endif
2787   procarr = GNUNET_malloc (sizeof (struct GNUNET_OS_Process *) * pg->total);
2788   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2789     {
2790       mytemp = GNUNET_DISK_mktemp ("friends");
2791       GNUNET_assert (mytemp != NULL);
2792       temp_friend_handle = fopen (mytemp, "wt");
2793       GNUNET_assert (temp_friend_handle != NULL);
2794 #if OLD
2795       conn_iter = pg->peers[pg_iter].allowed_peers_head;
2796       while (conn_iter != NULL)
2797         {
2798           GNUNET_CRYPTO_hash_to_enc (
2799                                      &pg->peers[conn_iter->index].daemon->id.hashPubKey,
2800                                      &peer_enc);
2801           fprintf (temp_friend_handle, "%s\n", (char *) &peer_enc);
2802           conn_iter = conn_iter->next;
2803         }
2804 #else
2805       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].allowed_peers,
2806           &friend_file_iterator,
2807           temp_friend_handle);
2808 #endif
2809       fclose (temp_friend_handle);
2810
2811       if (GNUNET_OK
2812           != GNUNET_CONFIGURATION_get_value_string (pg->peers[pg_iter].
2813                                                     daemon->cfg,
2814                                                     "PATHS", "SERVICEHOME",
2815                                                     &temp_service_path))
2816         {
2817           GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2818                       _("No `%s' specified in peer configuration in section `%s', cannot copy friends file!\n"),
2819                       "SERVICEHOME", "PATHS");
2820           if (UNLINK (mytemp) != 0)
2821             GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
2822                                       "unlink",
2823                                       mytemp);
2824           GNUNET_free (mytemp);
2825           break;
2826         }
2827
2828       if (pg->peers[pg_iter].daemon->hostname == NULL) /* Local, just copy the file */
2829         {
2830           GNUNET_asprintf (&arg, "%s/friends", temp_service_path);
2831           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "mv", "mv",
2832                                                       mytemp, arg, NULL);
2833           GNUNET_assert(procarr[pg_iter] != NULL);
2834 #if VERBOSE_TESTING
2835           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2836                       "Copying file with command cp %s %s\n",
2837                       mytemp,
2838                       arg);
2839 #endif
2840           ret = GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: schedule this, throttle! */
2841           GNUNET_OS_process_close (procarr[pg_iter]);
2842           GNUNET_free (arg);
2843         }
2844       else /* Remote, scp the file to the correct place */
2845         {
2846           if (NULL != pg->peers[pg_iter].daemon->username)
2847             GNUNET_asprintf (&arg, "%s@%s:%s/friends",
2848                              pg->peers[pg_iter].daemon->username,
2849                              pg->peers[pg_iter].daemon->hostname,
2850                              temp_service_path);
2851           else
2852             GNUNET_asprintf (&arg, "%s:%s/friends",
2853                              pg->peers[pg_iter].daemon->hostname,
2854                              temp_service_path);
2855           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "scp", "scp",
2856                                                       mytemp, arg, NULL);
2857           GNUNET_assert(procarr[pg_iter] != NULL);
2858           ret = GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: schedule this, throttle! */
2859           GNUNET_OS_process_close (procarr[pg_iter]);
2860           if (ret != GNUNET_OK)
2861             {
2862               /* FIXME: free contents of 'procarr' array */
2863               GNUNET_free (procarr);
2864               GNUNET_free (temp_service_path);
2865               GNUNET_free (mytemp);
2866               GNUNET_free (arg);
2867               return ret;
2868             }
2869           procarr[pg_iter] = NULL;
2870 #if VERBOSE_TESTING
2871           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2872                       "Copying file with command scp %s %s\n",
2873                       mytemp,
2874                       arg);
2875 #endif
2876           GNUNET_free (arg);
2877         }
2878       GNUNET_free (temp_service_path);
2879       GNUNET_free (mytemp);
2880     }
2881
2882 #if NOT_STUPID
2883   count = 0;
2884   ret = GNUNET_SYSERR;
2885   while ((count < max_wait) && (ret != GNUNET_OK))
2886     {
2887       ret = GNUNET_OK;
2888       for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2889         {
2890 #if VERBOSE_TESTING
2891           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2892                       "Checking copy status of file %d\n",
2893                       pg_iter);
2894 #endif
2895           if (procarr[pg_iter] != NULL) /* Check for already completed! */
2896             {
2897               if (GNUNET_OS_process_status
2898                   (procarr[pg_iter], &type, &return_code) != GNUNET_OK)
2899                 {
2900                   ret = GNUNET_SYSERR;
2901                 }
2902               else if ((type != GNUNET_OS_PROCESS_EXITED)
2903                   || (return_code != 0))
2904                 {
2905                   ret = GNUNET_SYSERR;
2906                 }
2907               else
2908                 {
2909                   GNUNET_OS_process_close (procarr[pg_iter]);
2910                   procarr[pg_iter] = NULL;
2911 #if VERBOSE_TESTING
2912                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2913                               "File %d copied\n",
2914                               pg_iter);
2915 #endif
2916                 }
2917             }
2918         }
2919       count++;
2920       if (ret == GNUNET_SYSERR)
2921         {
2922           /* FIXME: why sleep here? -CG */
2923           sleep (1);
2924         }
2925     }
2926
2927 #if VERBOSE_TESTING
2928   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2929       _("Finished copying all friend files!\n"));
2930 #endif
2931 #endif
2932   GNUNET_free (procarr);
2933   return ret;
2934 }
2935
2936 /*
2937  * Create the blacklist files based on the PeerConnection's
2938  * of each peer in the peer group, and copy the files
2939  * to the appropriate place.
2940  *
2941  * @param pg the peer group we are dealing with
2942  * @param transports space delimited list of transports to blacklist
2943  */
2944 static int
2945 create_and_copy_blacklist_files(struct GNUNET_TESTING_PeerGroup *pg,
2946                                 const char *transports)
2947 {
2948   FILE *temp_file_handle;
2949   unsigned int pg_iter;
2950   char *temp_service_path;
2951   struct GNUNET_OS_Process **procarr;
2952   char *arg;
2953   char *mytemp;
2954   enum GNUNET_OS_ProcessStatusType type;
2955   unsigned long return_code;
2956   int count;
2957   int ret;
2958   int max_wait = 10;
2959   int transport_len;
2960   unsigned int i;
2961   char *pos;
2962   char *temp_transports;
2963 #if OLD
2964   struct GNUNET_CRYPTO_HashAsciiEncoded peer_enc;
2965   struct PeerConnection *conn_iter;
2966 #else
2967   static struct BlacklistContext blacklist_ctx;
2968 #endif
2969
2970   procarr = GNUNET_malloc (sizeof (struct GNUNET_OS_Process *) * pg->total);
2971   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
2972     {
2973       mytemp = GNUNET_DISK_mktemp ("blacklist");
2974       GNUNET_assert (mytemp != NULL);
2975       temp_file_handle = fopen (mytemp, "wt");
2976       GNUNET_assert (temp_file_handle != NULL);
2977       temp_transports = GNUNET_strdup (transports);
2978 #if !OLD
2979       blacklist_ctx.temp_file_handle = temp_file_handle;
2980 #endif
2981       transport_len = strlen (temp_transports) + 1;
2982       pos = NULL;
2983
2984       for (i = 0; i < transport_len; i++)
2985         {
2986           if ((temp_transports[i] == ' ') && (pos == NULL))
2987             continue; /* At start of string (whitespace) */
2988           else if ((temp_transports[i] == ' ') || (temp_transports[i] == '\0')) /* At end of string */
2989             {
2990               temp_transports[i] = '\0';
2991 #if OLD
2992               conn_iter = pg->peers[pg_iter].blacklisted_peers_head;
2993               while (conn_iter != NULL)
2994                 {
2995                   GNUNET_CRYPTO_hash_to_enc (
2996                                              &pg->peers[conn_iter->index].daemon->id.hashPubKey,
2997                                              &peer_enc);
2998                   fprintf (temp_file_handle, "%s:%s\n", pos, (char *) &peer_enc);
2999                   conn_iter = conn_iter->next;
3000                 }
3001 #else
3002               blacklist_ctx.transport = pos;
3003               (void) GNUNET_CONTAINER_multihashmap_iterate (pg->
3004                                                             peers
3005                                                             [pg_iter].blacklisted_peers,
3006                                                             &blacklist_file_iterator,
3007                                                             &blacklist_ctx);
3008 #endif
3009               pos = NULL;
3010             } /* At beginning of actual string */
3011           else if (pos == NULL)
3012             {
3013               pos = &temp_transports[i];
3014             }
3015         }
3016
3017       GNUNET_free (temp_transports);
3018       fclose (temp_file_handle);
3019
3020       if (GNUNET_OK
3021           != GNUNET_CONFIGURATION_get_value_string (
3022                                                     pg->peers[pg_iter]. daemon->cfg,
3023                                                     "PATHS", "SERVICEHOME",
3024                                                     &temp_service_path))
3025         {
3026           GNUNET_log (
3027                       GNUNET_ERROR_TYPE_WARNING,
3028                       _
3029                       ("No `%s' specified in peer configuration in section `%s', cannot copy friends file!\n"),
3030                       "SERVICEHOME", "PATHS");
3031           if (UNLINK (mytemp) != 0)
3032             GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink",
3033                 mytemp);
3034           GNUNET_free (mytemp);
3035           break;
3036         }
3037
3038       if (pg->peers[pg_iter].daemon->hostname == NULL) /* Local, just copy the file */
3039         {
3040           GNUNET_asprintf (&arg, "%s/blacklist", temp_service_path);
3041           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "mv", "mv",
3042                                                       mytemp, arg, NULL);
3043 #if VERBOSE_TESTING
3044           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3045               _("Copying file with command cp %s %s\n"), mytemp, arg);
3046 #endif
3047
3048           GNUNET_free (arg);
3049         }
3050       else /* Remote, scp the file to the correct place */
3051         {
3052           if (NULL != pg->peers[pg_iter].daemon->username)
3053             GNUNET_asprintf (&arg, "%s@%s:%s/blacklist",
3054                              pg->peers[pg_iter].daemon->username,
3055                              pg->peers[pg_iter].daemon->hostname,
3056                              temp_service_path);
3057           else
3058             GNUNET_asprintf (&arg, "%s:%s/blacklist",
3059                              pg->peers[pg_iter].daemon->hostname,
3060                              temp_service_path);
3061           procarr[pg_iter] = GNUNET_OS_start_process (NULL, NULL, "scp", "scp",
3062                                                       mytemp, arg, NULL);
3063           GNUNET_assert(procarr[pg_iter] != NULL);
3064           GNUNET_OS_process_wait (procarr[pg_iter]); /* FIXME: add scheduled blacklist file copy that parallelizes file copying! */
3065
3066 #if VERBOSE_TESTING
3067           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3068               _("Copying file with command scp %s %s\n"), mytemp,
3069               arg);
3070 #endif
3071           GNUNET_free (arg);
3072         }
3073       GNUNET_free (temp_service_path);
3074       GNUNET_free (mytemp);
3075     }
3076
3077   count = 0;
3078   ret = GNUNET_SYSERR;
3079   while ((count < max_wait) && (ret != GNUNET_OK))
3080     {
3081       ret = GNUNET_OK;
3082       for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3083         {
3084 #if VERBOSE_TESTING
3085           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3086               _("Checking copy status of file %d\n"), pg_iter);
3087 #endif
3088           if (procarr[pg_iter] != NULL) /* Check for already completed! */
3089             {
3090               if (GNUNET_OS_process_status (procarr[pg_iter], &type,
3091                                             &return_code) != GNUNET_OK)
3092                 {
3093                   ret = GNUNET_SYSERR;
3094                 }
3095               else if ((type != GNUNET_OS_PROCESS_EXITED) || (return_code != 0))
3096                 {
3097                   ret = GNUNET_SYSERR;
3098                 }
3099               else
3100                 {
3101                   GNUNET_OS_process_close (procarr[pg_iter]);
3102                   procarr[pg_iter] = NULL;
3103 #if VERBOSE_TESTING
3104                   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3105                       _("File %d copied\n"), pg_iter);
3106 #endif
3107                 }
3108             }
3109         }
3110       count++;
3111       if (ret == GNUNET_SYSERR)
3112         {
3113           /* FIXME: why sleep here? -CG */
3114           sleep (1);
3115         }
3116     }
3117
3118 #if VERBOSE_TESTING
3119   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3120       _("Finished copying all blacklist files!\n"));
3121 #endif
3122   GNUNET_free (procarr);
3123   return ret;
3124 }
3125
3126 /* Forward Declaration */
3127 static void
3128 schedule_connect(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
3129
3130 /**
3131  * Choose a random peer's next connection to create, and
3132  * call schedule_connect to set up the connect task.
3133  *
3134  * @param ct_ctx the overall connection context
3135  */
3136 static void
3137 preschedule_connect(struct GNUNET_TESTING_PeerGroup *pg)
3138 {
3139   struct ConnectTopologyContext *ct_ctx = &pg->ct_ctx;
3140   struct PeerConnection *connection_iter;
3141   struct ConnectContext *connect_context;
3142   uint32_t random_peer;
3143
3144   if (ct_ctx->remaining_connections == 0)
3145     return;
3146   random_peer
3147       = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, pg->total);
3148   while (pg->peers[random_peer].connect_peers_head == NULL)
3149     random_peer = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
3150                                             pg->total);
3151
3152   connection_iter = pg->peers[random_peer].connect_peers_head;
3153   connect_context = GNUNET_malloc (sizeof (struct ConnectContext));
3154   connect_context->first_index = random_peer;
3155   connect_context->second_index = connection_iter->index;
3156   connect_context->ct_ctx = ct_ctx;
3157   GNUNET_SCHEDULER_add_now (&schedule_connect, connect_context);
3158   GNUNET_CONTAINER_DLL_remove(pg->peers[random_peer].connect_peers_head, pg->peers[random_peer].connect_peers_tail, connection_iter);
3159   GNUNET_free(connection_iter);
3160   ct_ctx->remaining_connections--;
3161 }
3162
3163 #if USE_SEND_HELLOS
3164 /* Forward declaration */
3165 static void schedule_send_hellos (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
3166
3167 /**
3168  * Close connections and free the hello context.
3169  *
3170  * @param cls the 'struct SendHelloContext *'
3171  * @param tc scheduler context
3172  */
3173 static void
3174 free_hello_context (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3175   {
3176     struct SendHelloContext *send_hello_context = cls;
3177     if (send_hello_context->peer->daemon->server != NULL)
3178       {
3179         GNUNET_CORE_disconnect(send_hello_context->peer->daemon->server);
3180         send_hello_context->peer->daemon->server = NULL;
3181       }
3182     if (send_hello_context->peer->daemon->th != NULL)
3183       {
3184         GNUNET_TRANSPORT_disconnect(send_hello_context->peer->daemon->th);
3185         send_hello_context->peer->daemon->th = NULL;
3186       }
3187     if (send_hello_context->core_connect_task != GNUNET_SCHEDULER_NO_TASK)
3188       {
3189         GNUNET_SCHEDULER_cancel(send_hello_context->core_connect_task);
3190         send_hello_context->core_connect_task = GNUNET_SCHEDULER_NO_TASK;
3191       }
3192     send_hello_context->pg->outstanding_connects--;
3193     GNUNET_free(send_hello_context);
3194   }
3195
3196 /**
3197  * For peers that haven't yet connected, notify
3198  * the caller that they have failed (timeout).
3199  *
3200  * @param cls the 'struct SendHelloContext *'
3201  * @param tc scheduler context
3202  */
3203 static void
3204 notify_remaining_connections_failed (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3205   {
3206     struct SendHelloContext *send_hello_context = cls;
3207     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3208     struct PeerConnection *connection;
3209
3210     GNUNET_CORE_disconnect(send_hello_context->peer->daemon->server);
3211     send_hello_context->peer->daemon->server = NULL;
3212
3213     connection = send_hello_context->peer->connect_peers_head;
3214
3215     while (connection != NULL)
3216       {
3217         if (pg->notify_connection != NULL)
3218           {
3219             pg->notify_connection(pg->notify_connection_cls,
3220                 &send_hello_context->peer->daemon->id,
3221                 &pg->peers[connection->index].daemon->id,
3222                 0, /* FIXME */
3223                 send_hello_context->peer->daemon->cfg,
3224                 pg->peers[connection->index].daemon->cfg,
3225                 send_hello_context->peer->daemon,
3226                 pg->peers[connection->index].daemon,
3227                 "Peers failed to connect (timeout)");
3228           }
3229         GNUNET_CONTAINER_DLL_remove(send_hello_context->peer->connect_peers_head, send_hello_context->peer->connect_peers_tail, connection);
3230         GNUNET_free(connection);
3231         connection = connection->next;
3232       }
3233     GNUNET_SCHEDULER_add_now(&free_hello_context, send_hello_context);
3234 #if BAD
3235     other_peer = &pg->peers[connection->index];
3236 #endif
3237   }
3238
3239 /**
3240  * For peers that haven't yet connected, send
3241  * CORE connect requests.
3242  *
3243  * @param cls the 'struct SendHelloContext *'
3244  * @param tc scheduler context
3245  */
3246 static void
3247 send_core_connect_requests (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3248   {
3249     struct SendHelloContext *send_hello_context = cls;
3250     struct PeerConnection *conn;
3251     GNUNET_assert(send_hello_context->peer->daemon->server != NULL);
3252
3253     send_hello_context->core_connect_task = GNUNET_SCHEDULER_NO_TASK;
3254
3255     send_hello_context->connect_attempts++;
3256     if (send_hello_context->connect_attempts < send_hello_context->pg->ct_ctx.connect_attempts)
3257       {
3258         conn = send_hello_context->peer->connect_peers_head;
3259         while (conn != NULL)
3260           {
3261             GNUNET_CORE_peer_request_connect(send_hello_context->peer->daemon->server,
3262                 &send_hello_context->pg->peers[conn->index].daemon->id,
3263                 NULL,
3264                 NULL);
3265             conn = conn->next;
3266           }
3267         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) ,
3268             &send_core_connect_requests,
3269             send_hello_context);
3270       }
3271     else
3272       {
3273         GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Timeout before all connections created, marking rest as failed!\n");
3274         GNUNET_SCHEDULER_add_now(&notify_remaining_connections_failed, send_hello_context);
3275       }
3276
3277   }
3278
3279 /**
3280  * Success, connection is up.  Signal client our success.
3281  *
3282  * @param cls our "struct SendHelloContext"
3283  * @param peer identity of the peer that has connected
3284  * @param atsi performance information
3285  *
3286  * FIXME: remove peers from BOTH lists, call notify twice, should
3287  * double the speed of connections as long as the list iteration
3288  * doesn't take too long!
3289  */
3290 static void
3291 core_connect_notify (void *cls,
3292     const struct GNUNET_PeerIdentity *peer,
3293     const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3294   {
3295     struct SendHelloContext *send_hello_context = cls;
3296     struct PeerConnection *connection;
3297     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3298 #if BAD
3299     struct PeerData *other_peer;
3300 #endif
3301 #if DEBUG_TESTING
3302     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3303         "Connected peer %s to peer %s\n",
3304         ctx->d1->shortname, GNUNET_i2s(peer));
3305 #endif
3306
3307     if (0 == memcmp(&send_hello_context->peer->daemon->id, peer, sizeof(struct GNUNET_PeerIdentity)))
3308     return;
3309
3310     connection = send_hello_context->peer->connect_peers_head;
3311 #if BAD
3312     other_peer = NULL;
3313 #endif
3314
3315     while ((connection != NULL) &&
3316         (0 != memcmp(&pg->peers[connection->index].daemon->id, peer, sizeof(struct GNUNET_PeerIdentity))))
3317       {
3318         connection = connection->next;
3319       }
3320
3321     if (connection == NULL)
3322       {
3323         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);
3324       }
3325     else
3326       {
3327 #if BAD
3328         other_peer = &pg->peers[connection->index];
3329 #endif
3330         if (pg->notify_connection != NULL)
3331           {
3332             pg->notify_connection(pg->notify_connection_cls,
3333                 &send_hello_context->peer->daemon->id,
3334                 peer,
3335                 0, /* FIXME */
3336                 send_hello_context->peer->daemon->cfg,
3337                 pg->peers[connection->index].daemon->cfg,
3338                 send_hello_context->peer->daemon,
3339                 pg->peers[connection->index].daemon,
3340                 NULL);
3341           }
3342         GNUNET_CONTAINER_DLL_remove(send_hello_context->peer->connect_peers_head, send_hello_context->peer->connect_peers_tail, connection);
3343         GNUNET_free(connection);
3344       }
3345
3346 #if BAD
3347     /* Notify of reverse connection and remove from other peers list of outstanding */
3348     if (other_peer != NULL)
3349       {
3350         connection = other_peer->connect_peers_head;
3351         while ((connection != NULL) &&
3352             (0 != memcmp(&send_hello_context->peer->daemon->id, &pg->peers[connection->index].daemon->id, sizeof(struct GNUNET_PeerIdentity))))
3353           {
3354             connection = connection->next;
3355           }
3356         if (connection != NULL)
3357           {
3358             if (pg->notify_connection != NULL)
3359               {
3360                 pg->notify_connection(pg->notify_connection_cls,
3361                     peer,
3362                     &send_hello_context->peer->daemon->id,
3363                     0, /* FIXME */
3364                     pg->peers[connection->index].daemon->cfg,
3365                     send_hello_context->peer->daemon->cfg,
3366                     pg->peers[connection->index].daemon,
3367                     send_hello_context->peer->daemon,
3368                     NULL);
3369               }
3370
3371             GNUNET_CONTAINER_DLL_remove(other_peer->connect_peers_head, other_peer->connect_peers_tail, connection);
3372             GNUNET_free(connection);
3373           }
3374       }
3375 #endif
3376
3377     if (send_hello_context->peer->connect_peers_head == NULL)
3378       {
3379         GNUNET_SCHEDULER_add_now(&free_hello_context, send_hello_context);
3380       }
3381   }
3382
3383 /**
3384  * Notify of a successful connection to the core service.
3385  *
3386  * @param cls a struct SendHelloContext *
3387  * @param server handle to the core service
3388  * @param my_identity the peer identity of this peer
3389  * @param publicKey the public key of the peer
3390  */
3391 void
3392 core_init (void *cls,
3393     struct GNUNET_CORE_Handle * server,
3394     const struct GNUNET_PeerIdentity *
3395     my_identity,
3396     const struct
3397     GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *
3398     publicKey)
3399   {
3400     struct SendHelloContext *send_hello_context = cls;
3401     send_hello_context->core_ready = GNUNET_YES;
3402   }
3403
3404 /**
3405  * Function called once a hello has been sent
3406  * to the transport, move on to the next one
3407  * or go away forever.
3408  *
3409  * @param cls the 'struct SendHelloContext *'
3410  * @param tc scheduler context
3411  */
3412 static void
3413 hello_sent_callback (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3414   {
3415     struct SendHelloContext *send_hello_context = cls;
3416     //unsigned int pg_iter;
3417     if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3418       {
3419         GNUNET_free(send_hello_context);
3420         return;
3421       }
3422
3423     send_hello_context->pg->remaining_hellos--;
3424 #if DEBUG_TESTING
3425     GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Sent HELLO, have %d remaining!\n", send_hello_context->pg->remaining_hellos);
3426 #endif
3427     if (send_hello_context->peer_pos == NULL) /* All HELLOs (for this peer!) have been transmitted! */
3428       {
3429 #if DEBUG_TESTING
3430         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "All hellos for this peer sent, disconnecting transport!\n");
3431 #endif
3432         GNUNET_assert(send_hello_context->peer->daemon->th != NULL);
3433         GNUNET_TRANSPORT_disconnect(send_hello_context->peer->daemon->th);
3434         send_hello_context->peer->daemon->th = NULL;
3435
3436         /*if (send_hello_context->pg->remaining_hellos == 0)
3437          {
3438          for (pg_iter = 0; pg_iter < send_hello_context->pg->max_outstanding_connections; pg_iter++)
3439          {
3440          preschedule_connect(&send_hello_context->pg->ct_ctx);
3441          }
3442          }
3443          */
3444         GNUNET_assert (send_hello_context->peer->daemon->server == NULL);
3445         send_hello_context->peer->daemon->server = GNUNET_CORE_connect(send_hello_context->peer->cfg,
3446             1,
3447             send_hello_context,
3448             &core_init,
3449             &core_connect_notify,
3450             NULL,
3451             NULL,
3452             NULL, GNUNET_NO,
3453             NULL, GNUNET_NO,
3454             no_handlers);
3455
3456         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),
3457             &send_core_connect_requests,
3458             send_hello_context);
3459       }
3460     else
3461     GNUNET_SCHEDULER_add_now(&schedule_send_hellos, send_hello_context);
3462   }
3463
3464 /**
3465  * Connect to a peer, give it all the HELLO's of those peers
3466  * we will later ask it to connect to.
3467  *
3468  * @param ct_ctx the overall connection context
3469  */
3470 static void schedule_send_hellos (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3471   {
3472     struct SendHelloContext *send_hello_context = cls;
3473     struct GNUNET_TESTING_PeerGroup *pg = send_hello_context->pg;
3474
3475     if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3476       {
3477         GNUNET_free(send_hello_context);
3478         return;
3479       }
3480
3481     GNUNET_assert(send_hello_context->peer_pos != NULL); /* All of the HELLO sends to be scheduled have been scheduled! */
3482
3483     if (((send_hello_context->peer->daemon->th == NULL) &&
3484             (pg->outstanding_connects > pg->max_outstanding_connections)) ||
3485         (pg->stop_connects == GNUNET_YES))
3486       {
3487 #if VERBOSE_TESTING > 2
3488         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3489             _
3490             ("Delaying connect, we have too many outstanding connections!\n"));
3491 #endif
3492         GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3493             (GNUNET_TIME_UNIT_MILLISECONDS, 100),
3494             &schedule_send_hellos, send_hello_context);
3495       }
3496     else
3497       {
3498 #if VERBOSE_TESTING > 2
3499         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3500             _("Creating connection, outstanding_connections is %d\n"),
3501             outstanding_connects);
3502 #endif
3503         if (send_hello_context->peer->daemon->th == NULL)
3504           {
3505             pg->outstanding_connects++; /* Actual TRANSPORT, CORE connections! */
3506             send_hello_context->peer->daemon->th
3507                 = GNUNET_TRANSPORT_connect (send_hello_context->peer->cfg, NULL,
3508                                             send_hello_context, NULL, NULL, NULL);
3509           }
3510 #if DEBUG_TESTING
3511         GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3512             _("Offering Hello of peer %s to peer %s\n"),
3513             send_hello_context->peer->daemon->shortname, pg->peers[send_hello_context->peer_pos->index].daemon->shortname);
3514 #endif
3515         GNUNET_TRANSPORT_offer_hello(send_hello_context->peer->daemon->th,
3516             (const struct GNUNET_MessageHeader *)pg->peers[send_hello_context->peer_pos->index].daemon->hello,
3517             &hello_sent_callback,
3518             send_hello_context);
3519         send_hello_context->peer_pos = send_hello_context->peer_pos->next;
3520         GNUNET_assert(send_hello_context->peer->daemon->th != NULL);
3521       }
3522   }
3523 #endif
3524
3525 /**
3526  * Internal notification of a connection, kept so that we can ensure some connections
3527  * happen instead of flooding all testing daemons with requests to connect.
3528  */
3529 static void
3530 internal_connect_notify(void *cls, const struct GNUNET_PeerIdentity *first,
3531                         const struct GNUNET_PeerIdentity *second,
3532                         uint32_t distance,
3533                         const struct GNUNET_CONFIGURATION_Handle *first_cfg,
3534                         const struct GNUNET_CONFIGURATION_Handle *second_cfg,
3535                         struct GNUNET_TESTING_Daemon *first_daemon,
3536                         struct GNUNET_TESTING_Daemon *second_daemon,
3537                         const char *emsg)
3538 {
3539   struct ConnectContext *connect_ctx = cls;
3540   struct ConnectTopologyContext *ct_ctx = connect_ctx->ct_ctx;
3541   struct GNUNET_TESTING_PeerGroup *pg = ct_ctx->pg;
3542   struct PeerConnection *connection;
3543
3544   GNUNET_assert (0 < pg->outstanding_connects);
3545   pg->outstanding_connects--;
3546
3547   /*
3548    * Check whether the inverse connection has been scheduled yet,
3549    * if not, we can remove it from the other peers list and avoid
3550    * even trying to connect them again!
3551    */
3552   connection = pg->peers[connect_ctx->second_index].connect_peers_head;
3553 #if BAD
3554   other_peer = NULL;
3555 #endif
3556
3557   while ((connection != NULL) && (0
3558       != memcmp (first, &pg->peers[connection->index].daemon->id,
3559                  sizeof(struct GNUNET_PeerIdentity))))
3560     {
3561       connection = connection->next;
3562     }
3563
3564   if (connection != NULL) /* Can safely remove! */
3565     {
3566       GNUNET_assert (0 < ct_ctx->remaining_connections);
3567       ct_ctx->remaining_connections--;
3568       if (pg->notify_connection != NULL) /* Notify of reverse connection */
3569         pg->notify_connection (pg->notify_connection_cls, second, first,
3570                                distance, second_cfg, first_cfg, second_daemon,
3571                                first_daemon, emsg);
3572
3573       GNUNET_CONTAINER_DLL_remove(pg->peers[connect_ctx->second_index].connect_peers_head, pg->peers[connect_ctx->second_index].connect_peers_tail, connection);
3574       GNUNET_free(connection);
3575     }
3576
3577   if (ct_ctx->remaining_connections == 0)
3578     {
3579       if (ct_ctx->notify_connections_done != NULL)
3580         {
3581           ct_ctx->notify_connections_done (ct_ctx->notify_cls, NULL);
3582           ct_ctx->notify_connections_done = NULL;
3583         }
3584     }
3585   else
3586     preschedule_connect (pg);
3587
3588   if (pg->notify_connection != NULL)
3589     pg->notify_connection (pg->notify_connection_cls, first, second, distance,
3590                            first_cfg, second_cfg, first_daemon, second_daemon,
3591                            emsg);
3592
3593   GNUNET_free(connect_ctx);
3594 }
3595
3596 /**
3597  * Either delay a connection (because there are too many outstanding)
3598  * or schedule it for right now.
3599  *
3600  * @param cls a connection context
3601  * @param tc the task runtime context
3602  */
3603 static void
3604 schedule_connect(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3605 {
3606   struct ConnectContext *connect_context = cls;
3607   struct GNUNET_TESTING_PeerGroup *pg = connect_context->ct_ctx->pg;
3608
3609   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3610     return;
3611
3612   if ((pg->outstanding_connects > pg->max_outstanding_connections)
3613       || (pg->stop_connects == GNUNET_YES))
3614     {
3615 #if VERBOSE_TESTING
3616       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3617           _
3618           ("Delaying connect, we have too many outstanding connections!\n"));
3619 #endif
3620       GNUNET_SCHEDULER_add_delayed (
3621                                     GNUNET_TIME_relative_multiply (
3622                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
3623                                                                    100),
3624                                     &schedule_connect, connect_context);
3625     }
3626   else
3627     {
3628 #if VERBOSE_TESTING
3629       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3630           _("Creating connection, outstanding_connections is %d (max %d)\n"),
3631           pg->outstanding_connects, pg->max_outstanding_connections);
3632 #endif
3633       pg->outstanding_connects++;
3634       pg->total_connects_scheduled++;
3635       GNUNET_TESTING_daemons_connect (
3636                                       pg->peers[connect_context->first_index].daemon,
3637                                       pg->peers[connect_context->second_index].daemon,
3638                                       connect_context->ct_ctx->connect_timeout,
3639                                       connect_context->ct_ctx->connect_attempts,
3640 #if USE_SEND_HELLOS
3641                                       GNUNET_NO,
3642 #else
3643                                       GNUNET_YES,
3644 #endif
3645                                       &internal_connect_notify, connect_context); /* FIXME: free connect context! */
3646     }
3647 }
3648
3649 #if !OLD
3650 /**
3651  * Iterator for actually scheduling connections to be created
3652  * between two peers.
3653  *
3654  * @param cls closure, a GNUNET_TESTING_Daemon
3655  * @param key the key the second Daemon was stored under
3656  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
3657  *
3658  * @return GNUNET_YES to continue iteration
3659  */
3660 static int
3661 connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
3662   {
3663     struct ConnectTopologyContext *ct_ctx = cls;
3664     struct PeerData *first = ct_ctx->first;
3665     struct GNUNET_TESTING_Daemon *second = value;
3666     struct ConnectContext *connect_context;
3667
3668     connect_context = GNUNET_malloc (sizeof (struct ConnectContext));
3669     connect_context->first = first->daemon;
3670     connect_context->second = second;
3671     connect_context->ct_ctx = ct_ctx;
3672     GNUNET_SCHEDULER_add_now (&schedule_connect, connect_context);
3673
3674     return GNUNET_YES;
3675   }
3676 #endif
3677
3678 #if !OLD
3679 /**
3680  * Iterator for copying all entries in the allowed hashmap to the
3681  * connect hashmap.
3682  *
3683  * @param cls closure, a GNUNET_TESTING_Daemon
3684  * @param key the key the second Daemon was stored under
3685  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
3686  *
3687  * @return GNUNET_YES to continue iteration
3688  */
3689 static int
3690 copy_topology_iterator (void *cls, const GNUNET_HashCode * key, void *value)
3691   {
3692     struct PeerData *first = cls;
3693
3694     GNUNET_assert (GNUNET_OK ==
3695         GNUNET_CONTAINER_multihashmap_put (first->connect_peers, key,
3696             value,
3697             GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
3698
3699     return GNUNET_YES;
3700   }
3701 #endif
3702
3703 /**
3704  * Make the peers to connect the same as those that are allowed to be
3705  * connected.
3706  *
3707  * @param pg the peer group
3708  */
3709 static int
3710 copy_allowed_topology(struct GNUNET_TESTING_PeerGroup *pg)
3711 {
3712   unsigned int pg_iter;
3713   int ret;
3714   int total;
3715 #if OLD
3716   struct PeerConnection *iter;
3717 #endif
3718   total = 0;
3719   ret = 0;
3720   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3721     {
3722 #if OLD
3723       iter = pg->peers[pg_iter].allowed_peers_head;
3724       while (iter != NULL)
3725         {
3726           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3727                       "Creating connection between %d and %d\n", pg_iter,
3728                       iter->index);
3729           total += add_connections (pg, pg_iter, iter->index, CONNECT,
3730                                     GNUNET_YES);
3731           //total += add_actual_connections(pg, pg_iter, iter->index);
3732           iter = iter->next;
3733         }
3734 #else
3735       ret =
3736       GNUNET_CONTAINER_multihashmap_iterate (pg->
3737           peers[pg_iter].allowed_peers,
3738           &copy_topology_iterator,
3739           &pg->peers[pg_iter]);
3740 #endif
3741       if (GNUNET_SYSERR == ret)
3742         return GNUNET_SYSERR;
3743
3744       total = total + ret;
3745     }
3746
3747   return total;
3748 }
3749
3750 /**
3751  * Connect the topology as specified by the PeerConnection's
3752  * of each peer in the peer group
3753  *
3754  * @param pg the peer group we are dealing with
3755  * @param connect_timeout how long try connecting two peers
3756  * @param connect_attempts how many times (max) to attempt
3757  * @param notify_callback callback to notify when finished
3758  * @param notify_cls closure for notify callback
3759  *
3760  * @return the number of connections that will be attempted
3761  */
3762 static int
3763 connect_topology(struct GNUNET_TESTING_PeerGroup *pg,
3764                  struct GNUNET_TIME_Relative connect_timeout,
3765                  unsigned int connect_attempts,
3766                  GNUNET_TESTING_NotifyCompletion notify_callback,
3767                  void *notify_cls)
3768 {
3769   unsigned int pg_iter;
3770   unsigned int total;
3771
3772 #if OLD
3773   struct PeerConnection *connection_iter;
3774 #endif
3775 #if USE_SEND_HELLOS
3776   struct SendHelloContext *send_hello_context;
3777 #endif
3778
3779   total = 0;
3780   pg->ct_ctx.notify_connections_done = notify_callback;
3781   pg->ct_ctx.notify_cls = notify_cls;
3782   pg->ct_ctx.pg = pg;
3783
3784   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3785     {
3786 #if OLD
3787       connection_iter = pg->peers[pg_iter].connect_peers_head;
3788       while (connection_iter != NULL)
3789         {
3790           connection_iter = connection_iter->next;
3791           total++;
3792         }
3793 #else
3794       total +=
3795       GNUNET_CONTAINER_multihashmap_size (pg->peers[pg_iter].connect_peers);
3796 #endif
3797     }
3798
3799   if (total == 0)
3800     return total;
3801
3802   pg->ct_ctx.connect_timeout = connect_timeout;
3803   pg->ct_ctx.connect_attempts = connect_attempts;
3804   pg->ct_ctx.remaining_connections = total;
3805
3806 #if USE_SEND_HELLOS
3807   /* First give all peers the HELLO's of other peers (connect to first peer's transport service, give HELLO's of other peers, continue...) */
3808   pg->remaining_hellos = total;
3809   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
3810     {
3811       send_hello_context = GNUNET_malloc(sizeof(struct SendHelloContext));
3812       send_hello_context->peer = &pg->peers[pg_iter];
3813       send_hello_context->peer_pos = pg->peers[pg_iter].connect_peers_head;
3814       send_hello_context->pg = pg;
3815       GNUNET_SCHEDULER_add_now(&schedule_send_hellos, send_hello_context);
3816     }
3817 #else
3818   for (pg_iter = 0; pg_iter < pg->max_outstanding_connections; pg_iter++)
3819     {
3820       preschedule_connect (pg);
3821     }
3822 #endif
3823   return total;
3824
3825 }
3826
3827 /**
3828  * Takes a peer group and creates a topology based on the
3829  * one specified.  Creates a topology means generates friend
3830  * files for the peers so they can only connect to those allowed
3831  * by the topology.  This will only have an effect once peers
3832  * are started if the FRIENDS_ONLY option is set in the base
3833  * config.  Also takes an optional restrict topology which
3834  * disallows connections based on particular transports
3835  * UNLESS they are specified in the restricted topology.
3836  *
3837  * @param pg the peer group struct representing the running peers
3838  * @param topology which topology to connect the peers in
3839  * @param restrict_topology disallow restrict_transports transport
3840  *                          connections to peers NOT in this topology
3841  *                          use GNUNET_TESTING_TOPOLOGY_NONE for no restrictions
3842  * @param restrict_transports space delimited list of transports to blacklist
3843  *                            to create restricted topology
3844  *
3845  * @return the maximum number of connections were all allowed peers
3846  *         connected to each other
3847  */
3848 unsigned int
3849 GNUNET_TESTING_create_topology(struct GNUNET_TESTING_PeerGroup *pg,
3850                                enum GNUNET_TESTING_Topology topology,
3851                                enum GNUNET_TESTING_Topology restrict_topology,
3852                                const char *restrict_transports)
3853 {
3854   int ret;
3855
3856   unsigned int num_connections;
3857   int unblacklisted_connections;
3858   char *filename;
3859   struct PeerConnection *conn_iter;
3860   struct PeerConnection *temp_conn;
3861   unsigned int off;
3862
3863 #if !OLD
3864   unsigned int i;
3865   for (i = 0; i < pg->total; i++)
3866     {
3867       pg->peers[i].allowed_peers =
3868       GNUNET_CONTAINER_multihashmap_create (100);
3869       pg->peers[i].connect_peers =
3870       GNUNET_CONTAINER_multihashmap_create (100);
3871       pg->peers[i].blacklisted_peers =
3872       GNUNET_CONTAINER_multihashmap_create (100);
3873       pg->peers[i].pg = pg;
3874     }
3875 #endif
3876
3877   switch (topology)
3878     {
3879   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
3880 #if VERBOSE_TESTING
3881     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating clique topology\n"));
3882 #endif
3883     num_connections = create_clique (pg, &add_connections, ALLOWED, GNUNET_NO);
3884     break;
3885   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
3886 #if VERBOSE_TESTING
3887     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3888         _("Creating small world (ring) topology\n"));
3889 #endif
3890     num_connections = create_small_world_ring (pg, &add_connections, ALLOWED);
3891     break;
3892   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
3893 #if VERBOSE_TESTING
3894     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3895         _("Creating small world (2d-torus) topology\n"));
3896 #endif
3897     num_connections = create_small_world (pg, &add_connections, ALLOWED);
3898     break;
3899   case GNUNET_TESTING_TOPOLOGY_RING:
3900 #if VERBOSE_TESTING
3901     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating ring topology\n"));
3902 #endif
3903     num_connections = create_ring (pg, &add_connections, ALLOWED);
3904     break;
3905   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
3906 #if VERBOSE_TESTING
3907     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating 2d torus topology\n"));
3908 #endif
3909     num_connections = create_2d_torus (pg, &add_connections, ALLOWED);
3910     break;
3911   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
3912 #if VERBOSE_TESTING
3913     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3914         _("Creating Erdos-Renyi topology\n"));
3915 #endif
3916     num_connections = create_erdos_renyi (pg, &add_connections, ALLOWED);
3917     break;
3918   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
3919 #if VERBOSE_TESTING
3920     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating InterNAT topology\n"));
3921 #endif
3922     num_connections = create_nated_internet (pg, &add_connections, ALLOWED);
3923     break;
3924   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
3925 #if VERBOSE_TESTING
3926     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3927         _("Creating Scale Free topology\n"));
3928 #endif
3929     num_connections = create_scale_free (pg, &add_connections, ALLOWED);
3930     break;
3931   case GNUNET_TESTING_TOPOLOGY_LINE:
3932 #if VERBOSE_TESTING
3933     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3934         _("Creating straight line topology\n"));
3935 #endif
3936     num_connections = create_line (pg, &add_connections, ALLOWED);
3937     break;
3938   case GNUNET_TESTING_TOPOLOGY_FROM_FILE:
3939 #if VERBOSE_TESTING
3940     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3941         _("Creating topology from file!\n"));
3942 #endif
3943     if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (pg->cfg, "testing",
3944                                                             "topology_file",
3945                                                             &filename))
3946       num_connections = create_from_file (pg, filename, &add_connections,
3947                                           ALLOWED);
3948     else
3949       {
3950         GNUNET_log (
3951                     GNUNET_ERROR_TYPE_WARNING,
3952                     "Missing configuration option TESTING:TOPOLOGY_FILE for creating topology from file!\n");
3953         num_connections = 0;
3954       }
3955     break;
3956   case GNUNET_TESTING_TOPOLOGY_NONE:
3957 #if VERBOSE_TESTING
3958     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3959         _
3960         ("Creating no allowed topology (all peers can connect at core level)\n"));
3961 #endif
3962     num_connections = pg->total * pg->total; /* Clique is allowed! */
3963     break;
3964   default:
3965     num_connections = 0;
3966     break;
3967     }
3968
3969   if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_yesno (pg->cfg, "TESTING",
3970                                                           "F2F"))
3971     {
3972       ret = create_and_copy_friend_files (pg);
3973       if (ret != GNUNET_OK)
3974         {
3975 #if VERBOSE_TESTING
3976           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3977               _("Failed during friend file copying!\n"));
3978 #endif
3979           return GNUNET_SYSERR;
3980         }
3981       else
3982         {
3983 #if VERBOSE_TESTING
3984           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3985               _("Friend files created/copied successfully!\n"));
3986 #endif
3987         }
3988     }
3989
3990   /* Use the create clique method to initially set all connections as blacklisted. */
3991   if ((restrict_topology != GNUNET_TESTING_TOPOLOGY_NONE) && (restrict_topology
3992       != GNUNET_TESTING_TOPOLOGY_FROM_FILE))
3993     create_clique (pg, &add_connections, BLACKLIST, GNUNET_NO);
3994   else
3995     return num_connections;
3996
3997   unblacklisted_connections = 0;
3998   /* Un-blacklist connections as per the topology specified */
3999   switch (restrict_topology)
4000     {
4001   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
4002 #if VERBOSE_TESTING
4003     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4004         _("Blacklisting all but clique topology\n"));
4005 #endif
4006     unblacklisted_connections = create_clique (pg, &remove_connections,
4007                                                BLACKLIST, GNUNET_NO);
4008     break;
4009   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
4010 #if VERBOSE_TESTING
4011     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4012         _("Blacklisting all but small world (ring) topology\n"));
4013 #endif
4014     unblacklisted_connections = create_small_world_ring (pg,
4015                                                          &remove_connections,
4016                                                          BLACKLIST);
4017     break;
4018   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
4019 #if VERBOSE_TESTING
4020     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4021         _
4022         ("Blacklisting all but small world (2d-torus) topology\n"));
4023 #endif
4024     unblacklisted_connections = create_small_world (pg, &remove_connections,
4025                                                     BLACKLIST);
4026     break;
4027   case GNUNET_TESTING_TOPOLOGY_RING:
4028 #if VERBOSE_TESTING
4029     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4030         _("Blacklisting all but ring topology\n"));
4031 #endif
4032     unblacklisted_connections
4033         = create_ring (pg, &remove_connections, BLACKLIST);
4034     break;
4035   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
4036 #if VERBOSE_TESTING
4037     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4038         _("Blacklisting all but 2d torus topology\n"));
4039 #endif
4040     unblacklisted_connections = create_2d_torus (pg, &remove_connections,
4041                                                  BLACKLIST);
4042     break;
4043   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
4044 #if VERBOSE_TESTING
4045     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4046         _("Blacklisting all but Erdos-Renyi topology\n"));
4047 #endif
4048     unblacklisted_connections = create_erdos_renyi (pg, &remove_connections,
4049                                                     BLACKLIST);
4050     break;
4051   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
4052 #if VERBOSE_TESTING
4053     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4054         _("Blacklisting all but InterNAT topology\n"));
4055 #endif
4056
4057 #if TOPOLOGY_HACK
4058     for (off = 0; off < pg->total; off++)
4059       {
4060         conn_iter = pg->peers[off].allowed_peers_head;
4061         while (conn_iter != NULL)
4062           {
4063             temp_conn = conn_iter->next;
4064             GNUNET_free(conn_iter);
4065             conn_iter = temp_conn;
4066           }
4067         pg->peers[off].allowed_peers_head = NULL;
4068         pg->peers[off].allowed_peers_tail = NULL;
4069
4070         conn_iter = pg->peers[off].connect_peers_head;
4071         while (conn_iter != NULL)
4072           {
4073             temp_conn = conn_iter->next;
4074             GNUNET_free(conn_iter);
4075             conn_iter = temp_conn;
4076           }
4077         pg->peers[off].connect_peers_head = NULL;
4078         pg->peers[off].connect_peers_tail = NULL;
4079       }
4080     unblacklisted_connections
4081         = create_nated_internet_copy (pg, &remove_connections, BLACKLIST);
4082 #else
4083     unblacklisted_connections =
4084     create_nated_internet (pg, &remove_connections, BLACKLIST);
4085 #endif
4086
4087     break;
4088   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
4089 #if VERBOSE_TESTING
4090     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4091         _("Blacklisting all but Scale Free topology\n"));
4092 #endif
4093     unblacklisted_connections = create_scale_free (pg, &remove_connections,
4094                                                    BLACKLIST);
4095     break;
4096   case GNUNET_TESTING_TOPOLOGY_LINE:
4097 #if VERBOSE_TESTING
4098     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4099         _("Blacklisting all but straight line topology\n"));
4100 #endif
4101     unblacklisted_connections
4102         = create_line (pg, &remove_connections, BLACKLIST);
4103     break;
4104   case GNUNET_TESTING_TOPOLOGY_NONE: /* Fall through */
4105   case GNUNET_TESTING_TOPOLOGY_FROM_FILE:
4106 #if VERBOSE_TESTING
4107     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4108         _
4109         ("Creating no blacklist topology (all peers can connect at transport level)\n"));
4110 #endif
4111     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _
4112     ("Creating blacklist topology from allowed\n"));
4113     unblacklisted_connections = copy_allowed (pg, &remove_connections);
4114   default:
4115     break;
4116     }
4117
4118   if ((unblacklisted_connections > 0) && (restrict_transports != NULL))
4119     {
4120       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Creating blacklist with `%s'\n",
4121                   restrict_transports);
4122       ret = create_and_copy_blacklist_files (pg, restrict_transports);
4123       if (ret != GNUNET_OK)
4124         {
4125 #if VERBOSE_TESTING
4126           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4127               _("Failed during blacklist file copying!\n"));
4128 #endif
4129           return 0;
4130         }
4131       else
4132         {
4133 #if VERBOSE_TESTING
4134           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4135               _("Blacklist files created/copied successfully!\n"));
4136 #endif
4137         }
4138     }
4139   return num_connections;
4140 }
4141
4142 #if !OLD
4143 /**
4144  * Iterator for choosing random peers to connect.
4145  *
4146  * @param cls closure, a RandomContext
4147  * @param key the key the second Daemon was stored under
4148  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4149  *
4150  * @return GNUNET_YES to continue iteration
4151  */
4152 static int
4153 random_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4154   {
4155     struct RandomContext *random_ctx = cls;
4156     double random_number;
4157     uint32_t second_pos;
4158     GNUNET_HashCode first_hash;
4159     random_number =
4160     ((double)
4161         GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
4162             UINT64_MAX)) / ((double) UINT64_MAX);
4163     if (random_number < random_ctx->percentage)
4164       {
4165         GNUNET_assert (GNUNET_OK ==
4166             GNUNET_CONTAINER_multihashmap_put (random_ctx->
4167                 first->connect_peers_working_set,
4168                 key, value,
4169                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4170       }
4171
4172     /* Now we have considered this particular connection, remove it from the second peer so it's not double counted */
4173     uid_from_hash (key, &second_pos);
4174     hash_from_uid (random_ctx->first_uid, &first_hash);
4175     GNUNET_assert (random_ctx->pg->total > second_pos);
4176     GNUNET_assert (GNUNET_YES ==
4177         GNUNET_CONTAINER_multihashmap_remove (random_ctx->
4178             pg->peers
4179             [second_pos].connect_peers,
4180             &first_hash,
4181             random_ctx->
4182             first->daemon));
4183
4184     return GNUNET_YES;
4185   }
4186
4187 /**
4188  * Iterator for adding at least X peers to a peers connection set.
4189  *
4190  * @param cls closure, MinimumContext
4191  * @param key the key the second Daemon was stored under
4192  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4193  *
4194  * @return GNUNET_YES to continue iteration
4195  */
4196 static int
4197 minimum_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4198   {
4199     struct MinimumContext *min_ctx = cls;
4200     uint32_t second_pos;
4201     GNUNET_HashCode first_hash;
4202     unsigned int i;
4203
4204     if (GNUNET_CONTAINER_multihashmap_size
4205         (min_ctx->first->connect_peers_working_set) < min_ctx->num_to_add)
4206       {
4207         for (i = 0; i < min_ctx->num_to_add; i++)
4208           {
4209             if (min_ctx->pg_array[i] == min_ctx->current)
4210               {
4211                 GNUNET_assert (GNUNET_OK ==
4212                     GNUNET_CONTAINER_multihashmap_put
4213                     (min_ctx->first->connect_peers_working_set, key,
4214                         value,
4215                         GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4216                 uid_from_hash (key, &second_pos);
4217                 hash_from_uid (min_ctx->first_uid, &first_hash);
4218                 GNUNET_assert (min_ctx->pg->total > second_pos);
4219                 GNUNET_assert (GNUNET_OK ==
4220                     GNUNET_CONTAINER_multihashmap_put (min_ctx->
4221                         pg->peers
4222                         [second_pos].connect_peers_working_set,
4223                         &first_hash,
4224                         min_ctx->first->
4225                         daemon,
4226                         GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4227                 /* Now we have added this particular connection, remove it from the second peer's map so it's not double counted */
4228                 GNUNET_assert (GNUNET_YES ==
4229                     GNUNET_CONTAINER_multihashmap_remove
4230                     (min_ctx->pg->peers[second_pos].connect_peers,
4231                         &first_hash, min_ctx->first->daemon));
4232               }
4233           }
4234         min_ctx->current++;
4235         return GNUNET_YES;
4236       }
4237     else
4238     return GNUNET_NO; /* We can stop iterating, we have enough peers! */
4239
4240   }
4241
4242 /**
4243  * Iterator for adding peers to a connection set based on a depth first search.
4244  *
4245  * @param cls closure, MinimumContext
4246  * @param key the key the second daemon was stored under
4247  * @param value the GNUNET_TESTING_Daemon that the first is to connect to
4248  *
4249  * @return GNUNET_YES to continue iteration
4250  */
4251 static int
4252 dfs_connect_iterator (void *cls, const GNUNET_HashCode * key, void *value)
4253   {
4254     struct DFSContext *dfs_ctx = cls;
4255     GNUNET_HashCode first_hash;
4256
4257     if (dfs_ctx->current == dfs_ctx->chosen)
4258       {
4259         GNUNET_assert (GNUNET_OK ==
4260             GNUNET_CONTAINER_multihashmap_put (dfs_ctx->
4261                 first->connect_peers_working_set,
4262                 key, value,
4263                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4264         uid_from_hash (key, &dfs_ctx->second_uid);
4265         hash_from_uid (dfs_ctx->first_uid, &first_hash);
4266         GNUNET_assert (GNUNET_OK ==
4267             GNUNET_CONTAINER_multihashmap_put (dfs_ctx->
4268                 pg->peers
4269                 [dfs_ctx->second_uid].connect_peers_working_set,
4270                 &first_hash,
4271                 dfs_ctx->
4272                 first->daemon,
4273                 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
4274         GNUNET_assert (GNUNET_YES ==
4275             GNUNET_CONTAINER_multihashmap_remove (dfs_ctx->
4276                 pg->peers
4277                 [dfs_ctx->second_uid].connect_peers,
4278                 &first_hash,
4279                 dfs_ctx->
4280                 first->daemon));
4281         /* Can't remove second from first yet because we are currently iterating, hence the return value in the DFSContext! */
4282         return GNUNET_NO; /* We have found our peer, don't iterate more */
4283       }
4284
4285     dfs_ctx->current++;
4286     return GNUNET_YES;
4287   }
4288 #endif
4289
4290 /**
4291  * From the set of connections possible, choose percentage percent of connections
4292  * to actually connect.
4293  *
4294  * @param pg the peergroup we are dealing with
4295  * @param percentage what percent of total connections to make
4296  */
4297 void
4298 choose_random_connections(struct GNUNET_TESTING_PeerGroup *pg,
4299                           double percentage)
4300 {
4301   uint32_t pg_iter;
4302 #if OLD
4303   struct PeerConnection *conn_iter;
4304   double random_number;
4305 #else
4306   struct RandomContext random_ctx;
4307 #endif
4308
4309   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4310     {
4311 #if OLD
4312       conn_iter = pg->peers[pg_iter].connect_peers_head;
4313       while (conn_iter != NULL)
4314         {
4315           random_number
4316               = ((double) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
4317                                                     UINT64_MAX))
4318                   / ((double) UINT64_MAX);
4319           if (random_number < percentage)
4320             {
4321               add_connections (pg, pg_iter, conn_iter->index, WORKING_SET,
4322                                GNUNET_YES);
4323             }
4324           conn_iter = conn_iter->next;
4325         }
4326 #else
4327       random_ctx.first_uid = pg_iter;
4328       random_ctx.first = &pg->peers[pg_iter];
4329       random_ctx.percentage = percentage;
4330       random_ctx.pg = pg;
4331       pg->peers[pg_iter].connect_peers_working_set
4332         = GNUNET_CONTAINER_multihashmap_create (pg->total);
4333       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].connect_peers,
4334                                              &random_connect_iterator,
4335                                              &random_ctx);
4336       /* Now remove the old connections */
4337       GNUNET_CONTAINER_multihashmap_destroy (pg->
4338                                              peers[pg_iter].connect_peers);
4339       /* And replace with the random set */
4340       pg->peers[pg_iter].connect_peers
4341         = pg->peers[pg_iter].connect_peers_working_set;
4342 #endif
4343     }
4344
4345   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4346     {
4347       conn_iter = pg->peers[pg_iter].connect_peers_head;
4348       while (pg->peers[pg_iter].connect_peers_head != NULL)
4349         remove_connections (pg, pg_iter,
4350                             pg->peers[pg_iter].connect_peers_head->index,
4351                             CONNECT, GNUNET_YES);
4352
4353       pg->peers[pg_iter].connect_peers_head
4354           = pg->peers[pg_iter].connect_peers_working_set_head;
4355       pg->peers[pg_iter].connect_peers_tail
4356           = pg->peers[pg_iter].connect_peers_working_set_tail;
4357       pg->peers[pg_iter].connect_peers_working_set_head = NULL;
4358       pg->peers[pg_iter].connect_peers_working_set_tail = NULL;
4359     }
4360 }
4361
4362 /**
4363  * Count the number of connections in a linked list of connections.
4364  *
4365  * @param conn_list the connection list to get the count of
4366  *
4367  * @return the number of elements in the list
4368  */
4369 static unsigned int
4370 count_connections(struct PeerConnection *conn_list)
4371 {
4372   struct PeerConnection *iter;
4373   unsigned int count;
4374   count = 0;
4375   iter = conn_list;
4376   while (iter != NULL)
4377     {
4378       iter = iter->next;
4379       count++;
4380     }
4381   return count;
4382 }
4383
4384 static unsigned int
4385 count_workingset_connections(struct GNUNET_TESTING_PeerGroup *pg)
4386 {
4387   unsigned int count;
4388   unsigned int pg_iter;
4389 #if OLD
4390   struct PeerConnection *conn_iter;
4391 #endif
4392   count = 0;
4393
4394   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4395     {
4396 #if OLD
4397       conn_iter = pg->peers[pg_iter].connect_peers_working_set_head;
4398       while (conn_iter != NULL)
4399         {
4400           count++;
4401           conn_iter = conn_iter->next;
4402         }
4403 #else
4404       count +=
4405       GNUNET_CONTAINER_multihashmap_size (pg->
4406           peers
4407           [pg_iter].connect_peers_working_set);
4408 #endif
4409     }
4410
4411   return count;
4412 }
4413
4414 static unsigned int
4415 count_allowed_connections(struct GNUNET_TESTING_PeerGroup *pg)
4416 {
4417   unsigned int count;
4418   unsigned int pg_iter;
4419 #if OLD
4420   struct PeerConnection *conn_iter;
4421 #endif
4422
4423   count = 0;
4424   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4425     {
4426 #if OLD
4427       conn_iter = pg->peers[pg_iter].allowed_peers_head;
4428       while (conn_iter != NULL)
4429         {
4430           count++;
4431           conn_iter = conn_iter->next;
4432         }
4433 #else
4434       count +=
4435       GNUNET_CONTAINER_multihashmap_size (pg->
4436           peers
4437           [pg_iter].allowed_peers);
4438 #endif
4439     }
4440
4441   return count;
4442 }
4443
4444 /**
4445  * From the set of connections possible, choose at least num connections per
4446  * peer.
4447  *
4448  * @param pg the peergroup we are dealing with
4449  * @param num how many connections at least should each peer have (if possible)?
4450  */
4451 static void
4452 choose_minimum(struct GNUNET_TESTING_PeerGroup *pg, unsigned int num)
4453 {
4454 #if !OLD
4455   struct MinimumContext minimum_ctx;
4456 #else
4457   struct PeerConnection *conn_iter;
4458   unsigned int temp_list_size;
4459   unsigned int i;
4460   unsigned int count;
4461   uint32_t random; /* Random list entry to connect peer to */
4462 #endif
4463   uint32_t pg_iter;
4464
4465 #if OLD
4466   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4467     {
4468       temp_list_size
4469           = count_connections (pg->peers[pg_iter].connect_peers_head);
4470       if (temp_list_size == 0)
4471         {
4472           GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4473                       "Peer %d has 0 connections!?!?\n", pg_iter);
4474           break;
4475         }
4476       for (i = 0; i < num; i++)
4477         {
4478           random = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4479                                              temp_list_size);
4480           conn_iter = pg->peers[pg_iter].connect_peers_head;
4481           for (count = 0; count < random; count++)
4482             conn_iter = conn_iter->next;
4483           /* We now have a random connection, connect it! */
4484           GNUNET_assert(conn_iter != NULL);
4485           add_connections (pg, pg_iter, conn_iter->index, WORKING_SET,
4486                            GNUNET_YES);
4487         }
4488     }
4489 #else
4490   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4491     {
4492       pg->peers[pg_iter].connect_peers_working_set =
4493       GNUNET_CONTAINER_multihashmap_create (num);
4494     }
4495
4496   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4497     {
4498       minimum_ctx.first_uid = pg_iter;
4499       minimum_ctx.pg_array =
4500       GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
4501           GNUNET_CONTAINER_multihashmap_size
4502           (pg->peers[pg_iter].connect_peers));
4503       minimum_ctx.first = &pg->peers[pg_iter];
4504       minimum_ctx.pg = pg;
4505       minimum_ctx.num_to_add = num;
4506       minimum_ctx.current = 0;
4507       GNUNET_CONTAINER_multihashmap_iterate (pg->peers[pg_iter].connect_peers,
4508           &minimum_connect_iterator,
4509           &minimum_ctx);
4510     }
4511
4512   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4513     {
4514       /* Remove the "old" connections */
4515       GNUNET_CONTAINER_multihashmap_destroy (pg->
4516           peers[pg_iter].connect_peers);
4517       /* And replace with the working set */
4518       pg->peers[pg_iter].connect_peers =
4519       pg->peers[pg_iter].connect_peers_working_set;
4520     }
4521 #endif
4522   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4523     {
4524       while (pg->peers[pg_iter].connect_peers_head != NULL)
4525         {
4526           conn_iter = pg->peers[pg_iter].connect_peers_head;
4527           GNUNET_CONTAINER_DLL_remove(pg->peers[pg_iter].connect_peers_head,
4528               pg->peers[pg_iter].connect_peers_tail,
4529               conn_iter);
4530           GNUNET_free(conn_iter);
4531           /*remove_connections(pg, pg_iter, pg->peers[pg_iter].connect_peers_head->index, CONNECT, GNUNET_YES);*/
4532         }
4533
4534       pg->peers[pg_iter].connect_peers_head
4535           = pg->peers[pg_iter].connect_peers_working_set_head;
4536       pg->peers[pg_iter].connect_peers_tail
4537           = pg->peers[pg_iter].connect_peers_working_set_tail;
4538       pg->peers[pg_iter].connect_peers_working_set_head = NULL;
4539       pg->peers[pg_iter].connect_peers_working_set_tail = NULL;
4540     }
4541 }
4542
4543 #if !OLD
4544 struct FindClosestContext
4545   {
4546     /**
4547      * The currently known closest peer.
4548      */
4549     struct GNUNET_TESTING_Daemon *closest;
4550
4551     /**
4552      * The info for the peer we are adding connections for.
4553      */
4554     struct PeerData *curr_peer;
4555
4556     /**
4557      * The distance (bits) between the current
4558      * peer and the currently known closest.
4559      */
4560     unsigned int closest_dist;
4561
4562     /**
4563      * The offset of the closest known peer in
4564      * the peer group.
4565      */
4566     unsigned int closest_num;
4567   };
4568
4569 /**
4570  * Iterator over hash map entries of the allowed
4571  * peer connections.  Find the closest, not already
4572  * connected peer and return it.
4573  *
4574  * @param cls closure (struct FindClosestContext)
4575  * @param key current key code (hash of offset in pg)
4576  * @param value value in the hash map - a GNUNET_TESTING_Daemon
4577  * @return GNUNET_YES if we should continue to
4578  *         iterate,
4579  *         GNUNET_NO if not.
4580  */
4581 static int
4582 find_closest_peers (void *cls, const GNUNET_HashCode * key, void *value)
4583   {
4584     struct FindClosestContext *closest_ctx = cls;
4585     struct GNUNET_TESTING_Daemon *daemon = value;
4586
4587     if (((closest_ctx->closest == NULL) ||
4588             (GNUNET_CRYPTO_hash_matching_bits
4589                 (&daemon->id.hashPubKey,
4590                     &closest_ctx->curr_peer->daemon->id.hashPubKey) >
4591                 closest_ctx->closest_dist))
4592         && (GNUNET_YES !=
4593             GNUNET_CONTAINER_multihashmap_contains (closest_ctx->
4594                 curr_peer->connect_peers,
4595                 key)))
4596       {
4597         closest_ctx->closest_dist =
4598         GNUNET_CRYPTO_hash_matching_bits (&daemon->id.hashPubKey,
4599             &closest_ctx->curr_peer->daemon->
4600             id.hashPubKey);
4601         closest_ctx->closest = daemon;
4602         uid_from_hash (key, &closest_ctx->closest_num);
4603       }
4604     return GNUNET_YES;
4605   }
4606
4607 /**
4608  * From the set of connections possible, choose at num connections per
4609  * peer based on depth which are closest out of those allowed.  Guaranteed
4610  * to add num peers to connect to, provided there are that many peers
4611  * in the underlay topology to connect to.
4612  *
4613  * @param pg the peergroup we are dealing with
4614  * @param num how many connections at least should each peer have (if possible)?
4615  * @param proc processor to actually add the connections
4616  * @param list the peer list to use
4617  */
4618 void
4619 add_closest (struct GNUNET_TESTING_PeerGroup *pg, unsigned int num,
4620     GNUNET_TESTING_ConnectionProcessor proc, enum PeerLists list)
4621   {
4622 #if OLD
4623
4624 #else
4625     struct FindClosestContext closest_ctx;
4626 #endif
4627     uint32_t pg_iter;
4628     uint32_t i;
4629
4630     for (i = 0; i < num; i++) /* Each time find a closest peer (from those available) */
4631       {
4632         for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4633           {
4634             closest_ctx.curr_peer = &pg->peers[pg_iter];
4635             closest_ctx.closest = NULL;
4636             closest_ctx.closest_dist = 0;
4637             closest_ctx.closest_num = 0;
4638             GNUNET_CONTAINER_multihashmap_iterate (pg->
4639                 peers[pg_iter].allowed_peers,
4640                 &find_closest_peers,
4641                 &closest_ctx);
4642             if (closest_ctx.closest != NULL)
4643               {
4644                 GNUNET_assert (closest_ctx.closest_num < pg->total);
4645                 proc (pg, pg_iter, closest_ctx.closest_num, list);
4646               }
4647           }
4648       }
4649   }
4650 #endif
4651
4652 /**
4653  * From the set of connections possible, choose at least num connections per
4654  * peer based on depth first traversal of peer connections.  If DFS leaves
4655  * peers unconnected, ensure those peers get connections.
4656  *
4657  * @param pg the peergroup we are dealing with
4658  * @param num how many connections at least should each peer have (if possible)?
4659  */
4660 void
4661 perform_dfs(struct GNUNET_TESTING_PeerGroup *pg, unsigned int num)
4662 {
4663   uint32_t pg_iter;
4664   uint32_t dfs_count;
4665   uint32_t starting_peer;
4666   uint32_t least_connections;
4667   uint32_t random_connection;
4668 #if OLD
4669   unsigned int temp_count;
4670   struct PeerConnection *peer_iter;
4671 #else
4672   struct DFSContext dfs_ctx;
4673   GNUNET_HashCode second_hash;
4674 #endif
4675
4676 #if OLD
4677   starting_peer = 0;
4678   dfs_count = 0;
4679   while ((count_workingset_connections (pg) < num * pg->total)
4680       && (count_allowed_connections (pg) > 0))
4681     {
4682       if (dfs_count % pg->total == 0) /* Restart the DFS at some weakly connected peer */
4683         {
4684           least_connections = -1; /* Set to very high number */
4685           for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4686             {
4687               temp_count
4688                   = count_connections (
4689                                        pg->peers[pg_iter].connect_peers_working_set_head);
4690               if (temp_count < least_connections)
4691                 {
4692                   starting_peer = pg_iter;
4693                   least_connections = temp_count;
4694                 }
4695             }
4696         }
4697
4698       temp_count
4699           = count_connections (pg->peers[starting_peer].connect_peers_head);
4700       if (temp_count == 0)
4701         continue; /* FIXME: infinite loop? */
4702
4703       random_connection = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4704                                                     temp_count);
4705       temp_count = 0;
4706       peer_iter = pg->peers[starting_peer].connect_peers_head;
4707       while (temp_count < random_connection)
4708         {
4709           peer_iter = peer_iter->next;
4710           temp_count++;
4711         }
4712       GNUNET_assert(peer_iter != NULL);
4713       add_connections (pg, starting_peer, peer_iter->index, WORKING_SET,
4714                        GNUNET_NO);
4715       remove_connections (pg, starting_peer, peer_iter->index, CONNECT,
4716                           GNUNET_YES);
4717       starting_peer = peer_iter->index;
4718       dfs_count++;
4719     }
4720
4721 #else
4722   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4723     {
4724       pg->peers[pg_iter].connect_peers_working_set =
4725       GNUNET_CONTAINER_multihashmap_create (num);
4726     }
4727
4728   starting_peer = 0;
4729   dfs_count = 0;
4730   while ((count_workingset_connections (pg) < num * pg->total)
4731       && (count_allowed_connections (pg) > 0))
4732     {
4733       if (dfs_count % pg->total == 0) /* Restart the DFS at some weakly connected peer */
4734         {
4735           least_connections = -1; /* Set to very high number */
4736           for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4737             {
4738               if (GNUNET_CONTAINER_multihashmap_size
4739                   (pg->peers[pg_iter].connect_peers_working_set) <
4740                   least_connections)
4741                 {
4742                   starting_peer = pg_iter;
4743                   least_connections =
4744                   GNUNET_CONTAINER_multihashmap_size (pg->
4745                       peers
4746                       [pg_iter].connect_peers_working_set);
4747                 }
4748             }
4749         }
4750
4751       if (GNUNET_CONTAINER_multihashmap_size (pg->peers[starting_peer].connect_peers) == 0) /* Ensure there is at least one peer left to connect! */
4752         {
4753           dfs_count = 0;
4754           continue;
4755         }
4756
4757       /* Choose a random peer from the chosen peers set of connections to add */
4758       dfs_ctx.chosen =
4759       GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
4760           GNUNET_CONTAINER_multihashmap_size
4761           (pg->peers[starting_peer].connect_peers));
4762       dfs_ctx.first_uid = starting_peer;
4763       dfs_ctx.first = &pg->peers[starting_peer];
4764       dfs_ctx.pg = pg;
4765       dfs_ctx.current = 0;
4766
4767       GNUNET_CONTAINER_multihashmap_iterate (pg->
4768           peers
4769           [starting_peer].connect_peers,
4770           &dfs_connect_iterator, &dfs_ctx);
4771       /* Remove the second from the first, since we will be continuing the search and may encounter the first peer again! */
4772       hash_from_uid (dfs_ctx.second_uid, &second_hash);
4773       GNUNET_assert (GNUNET_YES ==
4774           GNUNET_CONTAINER_multihashmap_remove (pg->peers
4775               [starting_peer].connect_peers,
4776               &second_hash,
4777               pg->
4778               peers
4779               [dfs_ctx.second_uid].daemon));
4780       starting_peer = dfs_ctx.second_uid;
4781     }
4782
4783   for (pg_iter = 0; pg_iter < pg->total; pg_iter++)
4784     {
4785       /* Remove the "old" connections */
4786       GNUNET_CONTAINER_multihashmap_destroy (pg->
4787           peers[pg_iter].connect_peers);
4788       /* And replace with the working set */
4789       pg->peers[pg_iter].connect_peers =
4790       pg->peers[pg_iter].connect_peers_working_set;
4791     }
4792 #endif
4793 }
4794
4795 /**
4796  * Internal callback for topology information for a particular peer.
4797  */
4798 static void
4799 internal_topology_callback(void *cls, const struct GNUNET_PeerIdentity *peer,
4800                            const struct GNUNET_TRANSPORT_ATS_Information *atsi)
4801 {
4802   struct CoreContext *core_ctx = cls;
4803   struct TopologyIterateContext *iter_ctx = core_ctx->iter_context;
4804
4805   if (peer == NULL) /* Either finished, or something went wrong */
4806     {
4807       iter_ctx->completed++;
4808       iter_ctx->connected--;
4809       /* One core context allocated per iteration, must free! */
4810       GNUNET_free (core_ctx);
4811     }
4812   else
4813     {
4814       iter_ctx->topology_cb (iter_ctx->cls, &core_ctx->daemon->id, peer, NULL);
4815     }
4816
4817   if (iter_ctx->completed == iter_ctx->total)
4818     {
4819       iter_ctx->topology_cb (iter_ctx->cls, NULL, NULL, NULL);
4820       /* Once all are done, free the iteration context */
4821       GNUNET_free (iter_ctx);
4822     }
4823 }
4824
4825 /**
4826  * Check running topology iteration tasks, if below max start a new one, otherwise
4827  * schedule for some time in the future.
4828  */
4829 static void
4830 schedule_get_topology(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4831 {
4832   struct CoreContext *core_context = cls;
4833   struct TopologyIterateContext *topology_context =
4834       (struct TopologyIterateContext *) core_context->iter_context;
4835   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
4836     return;
4837
4838   if (topology_context->connected
4839       > topology_context->pg->max_outstanding_connections)
4840     {
4841 #if VERBOSE_TESTING > 2
4842       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4843           _
4844           ("Delaying connect, we have too many outstanding connections!\n"));
4845 #endif
4846       GNUNET_SCHEDULER_add_delayed (
4847                                     GNUNET_TIME_relative_multiply (
4848                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
4849                                                                    100),
4850                                     &schedule_get_topology, core_context);
4851     }
4852   else
4853     {
4854 #if VERBOSE_TESTING > 2
4855       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4856           _("Creating connection, outstanding_connections is %d\n"),
4857           outstanding_connects);
4858 #endif
4859       topology_context->connected++;
4860
4861       if (GNUNET_OK != GNUNET_CORE_iterate_peers (core_context->daemon->cfg,
4862                                                   &internal_topology_callback,
4863                                                   core_context))
4864         {
4865           GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Topology iteration failed.\n");
4866           internal_topology_callback (core_context, NULL, NULL);
4867         }
4868     }
4869 }
4870
4871 /**
4872  * Iterate over all (running) peers in the peer group, retrieve
4873  * all connections that each currently has.
4874  */
4875 void
4876 GNUNET_TESTING_get_topology(struct GNUNET_TESTING_PeerGroup *pg,
4877                             GNUNET_TESTING_NotifyTopology cb, void *cls)
4878 {
4879   struct TopologyIterateContext *topology_context;
4880   struct CoreContext *core_ctx;
4881   unsigned int i;
4882   unsigned int total_count;
4883
4884   /* Allocate a single topology iteration context */
4885   topology_context = GNUNET_malloc (sizeof (struct TopologyIterateContext));
4886   topology_context->topology_cb = cb;
4887   topology_context->cls = cls;
4888   topology_context->pg = pg;
4889   total_count = 0;
4890   for (i = 0; i < pg->total; i++)
4891     {
4892       if (pg->peers[i].daemon->running == GNUNET_YES)
4893         {
4894           /* Allocate one core context per core we need to connect to */
4895           core_ctx = GNUNET_malloc (sizeof (struct CoreContext));
4896           core_ctx->daemon = pg->peers[i].daemon;
4897           /* Set back pointer to topology iteration context */
4898           core_ctx->iter_context = topology_context;
4899           GNUNET_SCHEDULER_add_now (&schedule_get_topology, core_ctx);
4900           total_count++;
4901         }
4902     }
4903   if (total_count == 0)
4904     {
4905       cb (cls, NULL, NULL, "Cannot iterate over topology, no running peers!");
4906       GNUNET_free (topology_context);
4907     }
4908   else
4909     topology_context->total = total_count;
4910   return;
4911 }
4912
4913 /**
4914  * Callback function to process statistic values.
4915  * This handler is here only really to insert a peer
4916  * identity (or daemon) so the statistics can be uniquely
4917  * tied to a single running peer.
4918  *
4919  * @param cls closure
4920  * @param subsystem name of subsystem that created the statistic
4921  * @param name the name of the datum
4922  * @param value the current value
4923  * @param is_persistent GNUNET_YES if the value is persistent, GNUNET_NO if not
4924  * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration
4925  */
4926 static int
4927 internal_stats_callback(void *cls, const char *subsystem, const char *name,
4928                         uint64_t value, int is_persistent)
4929 {
4930   struct StatsCoreContext *core_context = cls;
4931   struct StatsIterateContext *stats_context =
4932       (struct StatsIterateContext *) core_context->iter_context;
4933
4934   return stats_context->proc (stats_context->cls, &core_context->daemon->id,
4935                               subsystem, name, value, is_persistent);
4936 }
4937
4938 /**
4939  * Internal continuation call for statistics iteration.
4940  *
4941  * @param cls closure, the CoreContext for this iteration
4942  * @param success whether or not the statistics iterations
4943  *        was canceled or not (we don't care)
4944  */
4945 static void
4946 internal_stats_cont(void *cls, int success)
4947 {
4948   struct StatsCoreContext *core_context = cls;
4949   struct StatsIterateContext *stats_context =
4950       (struct StatsIterateContext *) core_context->iter_context;
4951
4952   stats_context->connected--;
4953   stats_context->completed++;
4954
4955   if (stats_context->completed == stats_context->total)
4956     {
4957       stats_context->cont (stats_context->cls, GNUNET_YES);
4958       GNUNET_free (stats_context);
4959     }
4960
4961   if (core_context->stats_handle != NULL)
4962     GNUNET_STATISTICS_destroy (core_context->stats_handle, GNUNET_NO);
4963
4964   GNUNET_free (core_context);
4965 }
4966
4967 /**
4968  * Check running topology iteration tasks, if below max start a new one, otherwise
4969  * schedule for some time in the future.
4970  */
4971 static void
4972 schedule_get_statistics(void *cls,
4973                         const struct GNUNET_SCHEDULER_TaskContext *tc)
4974 {
4975   struct StatsCoreContext *core_context = cls;
4976   struct StatsIterateContext *stats_context =
4977       (struct StatsIterateContext *) core_context->iter_context;
4978
4979   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
4980     return;
4981
4982   if (stats_context->connected > stats_context->pg->max_outstanding_connections)
4983     {
4984 #if VERBOSE_TESTING > 2
4985       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4986           _
4987           ("Delaying connect, we have too many outstanding connections!\n"));
4988 #endif
4989       GNUNET_SCHEDULER_add_delayed (
4990                                     GNUNET_TIME_relative_multiply (
4991                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
4992                                                                    100),
4993                                     &schedule_get_statistics, core_context);
4994     }
4995   else
4996     {
4997 #if VERBOSE_TESTING > 2
4998       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4999           _("Creating connection, outstanding_connections is %d\n"),
5000           outstanding_connects);
5001 #endif
5002
5003       stats_context->connected++;
5004       core_context->stats_handle
5005           = GNUNET_STATISTICS_create ("testing", core_context->daemon->cfg);
5006       if (core_context->stats_handle == NULL)
5007         {
5008           internal_stats_cont (core_context, GNUNET_NO);
5009           return;
5010         }
5011
5012       core_context->stats_get_handle
5013           = GNUNET_STATISTICS_get (core_context->stats_handle, NULL, NULL,
5014                                    GNUNET_TIME_relative_get_forever (),
5015                                    &internal_stats_cont,
5016                                    &internal_stats_callback, core_context);
5017       if (core_context->stats_get_handle == NULL)
5018         internal_stats_cont (core_context, GNUNET_NO);
5019
5020     }
5021 }
5022
5023 struct DuplicateStats
5024 {
5025   /**
5026    * Next item in the list
5027    */
5028   struct DuplicateStats *next;
5029
5030   /**
5031    * Nasty string, concatenation of relevant information.
5032    */
5033   char *unique_string;
5034 };
5035
5036 /**
5037  * Check whether the combination of port/host/unix domain socket
5038  * already exists in the list of peers being checked for statistics.
5039  *
5040  * @param pg the peergroup in question
5041  * @param specific_peer the peer we're concerned with
5042  * @param stats_list the list to return to the caller
5043  *
5044  * @return GNUNET_YES if the statistics instance has been seen already,
5045  *         GNUNET_NO if not (and we may have added it to the list)
5046  */
5047 static int
5048 stats_check_existing(struct GNUNET_TESTING_PeerGroup *pg,
5049                      struct PeerData *specific_peer,
5050                      struct DuplicateStats **stats_list)
5051 {
5052   struct DuplicateStats *pos;
5053   char *unix_domain_socket;
5054   unsigned long long port;
5055   char *to_match;
5056   if (GNUNET_YES
5057       != GNUNET_CONFIGURATION_get_value_yesno (pg->cfg, "testing",
5058                                                "single_statistics_per_host"))
5059     return GNUNET_NO; /* Each peer has its own statistics instance, do nothing! */
5060
5061   pos = *stats_list;
5062   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (specific_peer->cfg,
5063                                                           "statistics",
5064                                                           "unixpath",
5065                                                           &unix_domain_socket))
5066     return GNUNET_NO;
5067
5068   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (specific_peer->cfg,
5069                                                           "statistics", "port",
5070                                                           &port))
5071     {
5072       GNUNET_free(unix_domain_socket);
5073       return GNUNET_NO;
5074     }
5075
5076   if (specific_peer->daemon->hostname != NULL)
5077     GNUNET_asprintf (&to_match, "%s%s%llu", specific_peer->daemon->hostname,
5078                      unix_domain_socket, port);
5079   else
5080     GNUNET_asprintf (&to_match, "%s%llu", unix_domain_socket, port);
5081
5082   while (pos != NULL)
5083     {
5084       if (0 == strcmp (to_match, pos->unique_string))
5085         {
5086           GNUNET_free (unix_domain_socket);
5087           GNUNET_free (to_match);
5088           return GNUNET_YES;
5089         }
5090       pos = pos->next;
5091     }
5092   pos = GNUNET_malloc (sizeof (struct DuplicateStats));
5093   pos->unique_string = to_match;
5094   pos->next = *stats_list;
5095   *stats_list = pos;
5096   GNUNET_free (unix_domain_socket);
5097   return GNUNET_NO;
5098 }
5099
5100 /**
5101  * Iterate over all (running) peers in the peer group, retrieve
5102  * all statistics from each.
5103  */
5104 void
5105 GNUNET_TESTING_get_statistics(struct GNUNET_TESTING_PeerGroup *pg,
5106                               GNUNET_STATISTICS_Callback cont,
5107                               GNUNET_TESTING_STATISTICS_Iterator proc,
5108                               void *cls)
5109 {
5110   struct StatsIterateContext *stats_context;
5111   struct StatsCoreContext *core_ctx;
5112   unsigned int i;
5113   unsigned int total_count;
5114   struct DuplicateStats *stats_list;
5115   struct DuplicateStats *pos;
5116   stats_list = NULL;
5117
5118   /* Allocate a single stats iteration context */
5119   stats_context = GNUNET_malloc (sizeof (struct StatsIterateContext));
5120   stats_context->cont = cont;
5121   stats_context->proc = proc;
5122   stats_context->cls = cls;
5123   stats_context->pg = pg;
5124   total_count = 0;
5125
5126   for (i = 0; i < pg->total; i++)
5127     {
5128       if ((pg->peers[i].daemon->running == GNUNET_YES) && (GNUNET_NO
5129           == stats_check_existing (pg, &pg->peers[i], &stats_list)))
5130         {
5131           /* Allocate one core context per core we need to connect to */
5132           core_ctx = GNUNET_malloc (sizeof (struct StatsCoreContext));
5133           core_ctx->daemon = pg->peers[i].daemon;
5134           /* Set back pointer to topology iteration context */
5135           core_ctx->iter_context = stats_context;
5136           GNUNET_SCHEDULER_add_now (&schedule_get_statistics, core_ctx);
5137           total_count++;
5138         }
5139     }
5140
5141   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5142               "Retrieving stats from %u total instances.\n", total_count);
5143   stats_context->total = total_count;
5144   if (stats_list != NULL)
5145     {
5146       pos = stats_list;
5147       while (pos != NULL)
5148         {
5149           GNUNET_free (pos->unique_string);
5150           stats_list = pos->next;
5151           GNUNET_free (pos);
5152           pos = stats_list->next;
5153         }
5154     }
5155   return;
5156 }
5157
5158 /**
5159  * Stop the connection process temporarily.
5160  *
5161  * @param pg the peer group to stop connecting
5162  */
5163 void
5164 GNUNET_TESTING_stop_connections(struct GNUNET_TESTING_PeerGroup *pg)
5165 {
5166   pg->stop_connects = GNUNET_YES;
5167 }
5168
5169 /**
5170  * Resume the connection process temporarily.
5171  *
5172  * @param pg the peer group to resume connecting
5173  */
5174 void
5175 GNUNET_TESTING_resume_connections(struct GNUNET_TESTING_PeerGroup *pg)
5176 {
5177   pg->stop_connects = GNUNET_NO;
5178 }
5179
5180 /**
5181  * There are many ways to connect peers that are supported by this function.
5182  * To connect peers in the same topology that was created via the
5183  * GNUNET_TESTING_create_topology, the topology variable must be set to
5184  * GNUNET_TESTING_TOPOLOGY_NONE.  If the topology variable is specified,
5185  * a new instance of that topology will be generated and attempted to be
5186  * connected.  This could result in some connections being impossible,
5187  * because some topologies are non-deterministic.
5188  *
5189  * @param pg the peer group struct representing the running peers
5190  * @param topology which topology to connect the peers in
5191  * @param options options for connecting the topology
5192  * @param option_modifier modifier for options that take a parameter
5193  * @param connect_timeout how long to wait before giving up on connecting
5194  *                        two peers
5195  * @param connect_attempts how many times to attempt to connect two peers
5196  *                         over the connect_timeout duration
5197  * @param notify_callback notification to be called once all connections completed
5198  * @param notify_cls closure for notification callback
5199  *
5200  * @return the number of connections that will be attempted, GNUNET_SYSERR on error
5201  */
5202 int
5203 GNUNET_TESTING_connect_topology(
5204                                 struct GNUNET_TESTING_PeerGroup *pg,
5205                                 enum GNUNET_TESTING_Topology topology,
5206                                 enum GNUNET_TESTING_TopologyOption options,
5207                                 double option_modifier,
5208                                 struct GNUNET_TIME_Relative connect_timeout,
5209                                 unsigned int connect_attempts,
5210                                 GNUNET_TESTING_NotifyCompletion notify_callback,
5211                                 void *notify_cls)
5212 {
5213   switch (topology)
5214     {
5215   case GNUNET_TESTING_TOPOLOGY_CLIQUE:
5216 #if VERBOSE_TOPOLOGY
5217     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5218                 _("Creating clique CONNECT topology\n"));
5219 #endif
5220     create_clique (pg, &add_connections, CONNECT, GNUNET_NO);
5221     break;
5222   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING:
5223 #if VERBOSE_TOPOLOGY
5224     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5225                 _("Creating small world (ring) CONNECT topology\n"));
5226 #endif
5227     create_small_world_ring (pg, &add_connections, CONNECT);
5228     break;
5229   case GNUNET_TESTING_TOPOLOGY_SMALL_WORLD:
5230 #if VERBOSE_TOPOLOGY
5231     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5232                 _("Creating small world (2d-torus) CONNECT topology\n"));
5233 #endif
5234     create_small_world (pg, &add_connections, CONNECT);
5235     break;
5236   case GNUNET_TESTING_TOPOLOGY_RING:
5237 #if VERBOSE_TOPOLOGY
5238     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating ring CONNECT topology\n"));
5239 #endif
5240     create_ring (pg, &add_connections, CONNECT);
5241     break;
5242   case GNUNET_TESTING_TOPOLOGY_2D_TORUS:
5243 #if VERBOSE_TOPOLOGY
5244     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5245                 _("Creating 2d torus CONNECT topology\n"));
5246 #endif
5247     create_2d_torus (pg, &add_connections, CONNECT);
5248     break;
5249   case GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI:
5250 #if VERBOSE_TOPOLOGY
5251     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5252                 _("Creating Erdos-Renyi CONNECT topology\n"));
5253 #endif
5254     create_erdos_renyi (pg, &add_connections, CONNECT);
5255     break;
5256   case GNUNET_TESTING_TOPOLOGY_INTERNAT:
5257 #if VERBOSE_TOPOLOGY
5258     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5259                 _("Creating InterNAT CONNECT topology\n"));
5260 #endif
5261     create_nated_internet (pg, &add_connections, CONNECT);
5262     break;
5263   case GNUNET_TESTING_TOPOLOGY_SCALE_FREE:
5264 #if VERBOSE_TOPOLOGY
5265     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5266                 _("Creating Scale Free CONNECT topology\n"));
5267 #endif
5268     create_scale_free (pg, &add_connections, CONNECT);
5269     break;
5270   case GNUNET_TESTING_TOPOLOGY_LINE:
5271 #if VERBOSE_TOPOLOGY
5272     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5273                 _("Creating straight line CONNECT topology\n"));
5274 #endif
5275     create_line (pg, &add_connections, CONNECT);
5276     break;
5277   case GNUNET_TESTING_TOPOLOGY_NONE:
5278 #if VERBOSE_TOPOLOGY
5279     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _("Creating no CONNECT topology\n"));
5280 #endif
5281     copy_allowed_topology (pg);
5282     break;
5283   default:
5284     GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _
5285     ("Unknown topology specification, can't connect peers!\n"));
5286     return GNUNET_SYSERR;
5287     }
5288
5289   switch (options)
5290     {
5291   case GNUNET_TESTING_TOPOLOGY_OPTION_RANDOM:
5292 #if VERBOSE_TOPOLOGY
5293     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _
5294     ("Connecting random subset (%'.2f percent) of possible peers\n"), 100
5295         * option_modifier);
5296 #endif
5297     choose_random_connections (pg, option_modifier);
5298     break;
5299   case GNUNET_TESTING_TOPOLOGY_OPTION_MINIMUM:
5300 #if VERBOSE_TOPOLOGY
5301     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5302                 _("Connecting a minimum of %u peers each (if possible)\n"),
5303                 (unsigned int) option_modifier);
5304 #endif
5305     choose_minimum (pg, (unsigned int) option_modifier);
5306     break;
5307   case GNUNET_TESTING_TOPOLOGY_OPTION_DFS:
5308 #if VERBOSE_TOPOLOGY
5309     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, _
5310     ("Using DFS to connect a minimum of %u peers each (if possible)\n"),
5311                 (unsigned int) option_modifier);
5312 #endif
5313 #if FIXME
5314     perform_dfs (pg, (int) option_modifier);
5315 #endif
5316     break;
5317   case GNUNET_TESTING_TOPOLOGY_OPTION_ADD_CLOSEST:
5318 #if VERBOSE_TOPOLOGY
5319     GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _
5320     ("Finding additional %u closest peers each (if possible)\n"),
5321                 (unsigned int) option_modifier);
5322 #endif
5323 #if FIXME
5324     add_closest (pg, (unsigned int) option_modifier,
5325         &add_connections, CONNECT);
5326 #endif
5327     break;
5328   case GNUNET_TESTING_TOPOLOGY_OPTION_NONE:
5329     break;
5330   case GNUNET_TESTING_TOPOLOGY_OPTION_ALL:
5331     break;
5332   default:
5333     break;
5334     }
5335
5336   return connect_topology (pg, connect_timeout, connect_attempts,
5337                            notify_callback, notify_cls);
5338 }
5339
5340 /**
5341  * Lookup and return the number of SSH connections to a host.
5342  *
5343  * @param hostname the hostname to lookup in the list
5344  * @param pg the peergroup that the host belongs to
5345  *
5346  * @return the number of current ssh connections to the host
5347  */
5348 static unsigned int
5349 count_outstanding_at_host(const char *hostname,
5350                           struct GNUNET_TESTING_PeerGroup *pg)
5351 {
5352   struct OutstandingSSH *pos;
5353   pos = pg->ssh_head;
5354   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5355     pos = pos->next;
5356   GNUNET_assert(pos != NULL);
5357   return pos->outstanding;
5358 }
5359
5360 /**
5361  * Increment the number of SSH connections to a host by one.
5362  *
5363  * @param hostname the hostname to lookup in the list
5364  * @param pg the peergroup that the host belongs to
5365  *
5366  */
5367 static void
5368 increment_outstanding_at_host(const char *hostname,
5369                               struct GNUNET_TESTING_PeerGroup *pg)
5370 {
5371   struct OutstandingSSH *pos;
5372   pos = pg->ssh_head;
5373   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5374     pos = pos->next;
5375   GNUNET_assert(pos != NULL);
5376   pos->outstanding++;
5377 }
5378
5379 /**
5380  * Decrement the number of SSH connections to a host by one.
5381  *
5382  * @param hostname the hostname to lookup in the list
5383  * @param pg the peergroup that the host belongs to
5384  *
5385  */
5386 static void
5387 decrement_outstanding_at_host(const char *hostname,
5388                               struct GNUNET_TESTING_PeerGroup *pg)
5389 {
5390   struct OutstandingSSH *pos;
5391   pos = pg->ssh_head;
5392   while ((pos != NULL) && (strcmp (pos->hostname, hostname) != 0))
5393     pos = pos->next;
5394   GNUNET_assert(pos != NULL);
5395   pos->outstanding--;
5396 }
5397
5398 /**
5399  * Callback that is called whenever a hostkey is generated
5400  * for a peer.  Call the real callback and decrement the
5401  * starting counter for the peergroup.
5402  *
5403  * @param cls closure
5404  * @param id identifier for the daemon, NULL on error
5405  * @param d handle for the daemon
5406  * @param emsg error message (NULL on success)
5407  */
5408 static void
5409 internal_hostkey_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5410                           struct GNUNET_TESTING_Daemon *d, const char *emsg)
5411 {
5412   struct InternalStartContext *internal_context = cls;
5413   internal_context->peer->pg->starting--;
5414   internal_context->peer->pg->started++;
5415   if (internal_context->hostname != NULL)
5416     decrement_outstanding_at_host (internal_context->hostname,
5417                                    internal_context->peer->pg);
5418   if (internal_context->hostkey_callback != NULL)
5419     internal_context->hostkey_callback (internal_context->hostkey_cls, id, d,
5420                                         emsg);
5421   else if (internal_context->peer->pg->started
5422       == internal_context->peer->pg->total)
5423     {
5424       internal_context->peer->pg->started = 0; /* Internal startup may use this counter! */
5425       GNUNET_TESTING_daemons_continue_startup (internal_context->peer->pg);
5426     }
5427 }
5428
5429 /**
5430  * Callback that is called whenever a peer has finished starting.
5431  * Call the real callback and decrement the starting counter
5432  * for the peergroup.
5433  *
5434  * @param cls closure
5435  * @param id identifier for the daemon, NULL on error
5436  * @param cfg config
5437  * @param d handle for the daemon
5438  * @param emsg error message (NULL on success)
5439  */
5440 static void
5441 internal_startup_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5442                           const struct GNUNET_CONFIGURATION_Handle *cfg,
5443                           struct GNUNET_TESTING_Daemon *d, const char *emsg)
5444 {
5445   struct InternalStartContext *internal_context = cls;
5446   internal_context->peer->pg->starting--;
5447   if (internal_context->hostname != NULL)
5448     decrement_outstanding_at_host (internal_context->hostname,
5449                                    internal_context->peer->pg);
5450   if (internal_context->start_cb != NULL)
5451     internal_context->start_cb (internal_context->start_cb_cls, id, cfg, d,
5452                                 emsg);
5453 }
5454
5455 static void
5456 internal_continue_startup(void *cls,
5457                           const struct GNUNET_SCHEDULER_TaskContext *tc)
5458 {
5459   struct InternalStartContext *internal_context = cls;
5460
5461   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
5462     {
5463       return;
5464     }
5465
5466   if ((internal_context->peer->pg->starting
5467       < internal_context->peer->pg->max_concurrent_ssh)
5468       || ((internal_context->hostname != NULL)
5469           && (count_outstanding_at_host (internal_context->hostname,
5470                                          internal_context->peer->pg)
5471               < internal_context->peer->pg->max_concurrent_ssh)))
5472     {
5473       if (internal_context->hostname != NULL)
5474         increment_outstanding_at_host (internal_context->hostname,
5475                                        internal_context->peer->pg);
5476       internal_context->peer->pg->starting++;
5477       GNUNET_TESTING_daemon_continue_startup (internal_context->peer->daemon);
5478     }
5479   else
5480     {
5481       GNUNET_SCHEDULER_add_delayed (
5482                                     GNUNET_TIME_relative_multiply (
5483                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
5484                                                                    100),
5485                                     &internal_continue_startup,
5486                                     internal_context);
5487     }
5488 }
5489
5490 /**
5491  * Callback for informing us about a successful
5492  * or unsuccessful churn start call.
5493  *
5494  * @param cls a ChurnContext
5495  * @param id the peer identity of the started peer
5496  * @param cfg the handle to the configuration of the peer
5497  * @param d handle to the daemon for the peer
5498  * @param emsg NULL on success, non-NULL on failure
5499  *
5500  */
5501 void
5502 churn_start_callback(void *cls, const struct GNUNET_PeerIdentity *id,
5503                      const struct GNUNET_CONFIGURATION_Handle *cfg,
5504                      struct GNUNET_TESTING_Daemon *d, const char *emsg)
5505 {
5506   struct ChurnRestartContext *startup_ctx = cls;
5507   struct ChurnContext *churn_ctx = startup_ctx->churn_ctx;
5508
5509   unsigned int total_left;
5510   char *error_message;
5511
5512   error_message = NULL;
5513   if (emsg != NULL)
5514     {
5515       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5516                   "Churn stop callback failed with error `%s'\n", emsg);
5517       churn_ctx->num_failed_start++;
5518     }
5519   else
5520     {
5521       churn_ctx->num_to_start--;
5522     }
5523
5524 #if DEBUG_CHURN
5525   GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5526       "Started peer, %d left.\n", churn_ctx->num_to_start);
5527 #endif
5528
5529   total_left = (churn_ctx->num_to_stop - churn_ctx->num_failed_stop)
5530       + (churn_ctx->num_to_start - churn_ctx->num_failed_start);
5531
5532   if (total_left == 0)
5533     {
5534       if ((churn_ctx->num_failed_stop > 0) || (churn_ctx->num_failed_start > 0))
5535         GNUNET_asprintf (
5536                          &error_message,
5537                          "Churn didn't complete successfully, %u peers failed to start %u peers failed to be stopped!",
5538                          churn_ctx->num_failed_start,
5539                          churn_ctx->num_failed_stop);
5540       churn_ctx->cb (churn_ctx->cb_cls, error_message);
5541       GNUNET_free_non_null (error_message);
5542       GNUNET_free (churn_ctx);
5543       GNUNET_free (startup_ctx);
5544     }
5545 }
5546
5547 static void
5548 schedule_churn_restart(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5549 {
5550   struct PeerRestartContext *peer_restart_ctx = cls;
5551   struct ChurnRestartContext *startup_ctx = peer_restart_ctx->churn_restart_ctx;
5552
5553   if (startup_ctx->outstanding > startup_ctx->pg->max_concurrent_ssh)
5554     GNUNET_SCHEDULER_add_delayed (
5555                                   GNUNET_TIME_relative_multiply (
5556                                                                  GNUNET_TIME_UNIT_MILLISECONDS,
5557                                                                  100),
5558                                   &schedule_churn_restart, peer_restart_ctx);
5559   else
5560     {
5561       GNUNET_TESTING_daemon_start_stopped (peer_restart_ctx->daemon,
5562                                            startup_ctx->timeout,
5563                                            &churn_start_callback, startup_ctx);
5564       GNUNET_free (peer_restart_ctx);
5565     }
5566 }
5567
5568
5569 static void
5570 internal_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5571 {
5572   struct InternalStartContext *internal_context = cls;
5573
5574   if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
5575     {
5576       return;
5577     }
5578
5579   if ((internal_context->peer->pg->starting
5580       < internal_context->peer->pg->max_concurrent_ssh)
5581       || ((internal_context->hostname != NULL)
5582           && (count_outstanding_at_host (internal_context->hostname,
5583                                          internal_context->peer->pg)
5584               < internal_context->peer->pg->max_concurrent_ssh)))
5585     {
5586       if (internal_context->hostname != NULL)
5587         increment_outstanding_at_host (internal_context->hostname,
5588                                        internal_context->peer->pg);
5589       internal_context->peer->pg->starting++;
5590       internal_context->peer->daemon
5591           = GNUNET_TESTING_daemon_start (internal_context->peer->cfg,
5592                                          internal_context->timeout,
5593                                          GNUNET_NO,
5594                                          internal_context->hostname,
5595                                          internal_context->username,
5596                                          internal_context->sshport,
5597                                          internal_context->hostkey,
5598                                          &internal_hostkey_callback,
5599                                          internal_context,
5600                                          &internal_startup_callback,
5601                                          internal_context);
5602     }
5603   else
5604     {
5605       GNUNET_SCHEDULER_add_delayed (
5606                                     GNUNET_TIME_relative_multiply (
5607                                                                    GNUNET_TIME_UNIT_MILLISECONDS,
5608                                                                    100),
5609                                     &internal_start, internal_context);
5610     }
5611 }
5612 #if USE_START_HELPER
5613
5614 struct PeerStartHelperContext
5615 {
5616   struct GNUNET_TESTING_PeerGroup *pg;
5617
5618   struct HostData *host;
5619
5620   struct GNUNET_OS_Process *proc;
5621 };
5622
5623 static void
5624 check_peers_started (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5625 {
5626   struct PeerStartHelperContext *helper = cls;
5627   enum GNUNET_OS_ProcessStatusType type;
5628   unsigned long code;
5629   unsigned int i;
5630   GNUNET_TESTING_NotifyDaemonRunning cb;
5631
5632   if (GNUNET_NO == GNUNET_OS_process_status (helper->proc, &type, &code)) /* Still running, wait some more! */
5633   {
5634     GNUNET_SCHEDULER_add_delayed(GNUNET_CONSTANTS_EXEC_WAIT, &check_peers_started, helper);
5635     return;
5636   }
5637
5638   helper->pg->starting--;
5639   if (helper->pg->starting == 0) /* All peers have finished starting! */
5640     {
5641       /* Call the peer started callback for each peer, set proper FSM state (?) */
5642       for (i = 0; i < helper->pg->total; i++)
5643         {
5644           cb = helper->pg->peers[i].daemon->cb;
5645           helper->pg->peers[i].daemon->cb = NULL;
5646           helper->pg->peers[i].daemon->running = GNUNET_YES;
5647           helper->pg->peers[i].daemon->phase = SP_START_DONE;
5648           if (NULL != cb)
5649           {
5650             if ((type != GNUNET_OS_PROCESS_EXITED) || (code != 0))
5651               cb (helper->pg->peers[i].daemon->cb_cls,
5652                   &helper->pg->peers[i].daemon->id,
5653                   helper->pg->peers[i].daemon->cfg, helper->pg->peers[i].daemon,
5654                   "Failed to execute peerStartHelper.pl, or return code bad!");
5655             else
5656               cb (helper->pg->peers[i].daemon->cb_cls,
5657                   &helper->pg->peers[i].daemon->id,
5658                   helper->pg->peers[i].daemon->cfg, helper->pg->peers[i].daemon,
5659                   NULL);
5660
5661           }
5662
5663         }
5664     }
5665   GNUNET_OS_process_close(helper->proc);
5666 }
5667
5668 static void
5669 start_peer_helper (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5670 {
5671   struct PeerStartHelperContext *helper = cls;
5672   char *baseservicehome;
5673   char *tempdir;
5674   char *arg;
5675   /* ssh user@host peerStartHelper /path/to/basedirectory */
5676   GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (helper->pg->cfg, "PATHS", "SERVICEHOME",
5677                                                                     &baseservicehome));
5678   GNUNET_asprintf(&tempdir, "%s/%s/", baseservicehome, helper->host->hostname);
5679   if (NULL != helper->host->username)
5680     GNUNET_asprintf (&arg, "%s@%s", helper->host->username, helper->host->hostname);
5681   else
5682     GNUNET_asprintf (&arg, "%s", helper->host->hostname);
5683
5684   /* FIXME: Doesn't support ssh_port option! */
5685   helper->proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", arg,
5686                                   "peerStartHelper.pl", tempdir,  NULL);
5687   GNUNET_assert(helper->proc != NULL);
5688   GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "starting peers with cmd ssh %s %s %s\n", arg, "peerStartHelper.pl", tempdir);
5689   GNUNET_SCHEDULER_add_now (&check_peers_started, helper);
5690   GNUNET_free (tempdir);
5691   GNUNET_free (baseservicehome);
5692   GNUNET_free (arg);
5693 }
5694 #endif
5695
5696 /**
5697  * Function which continues a peer group starting up
5698  * after successfully generating hostkeys for each peer.
5699  *
5700  * @param pg the peer group to continue starting
5701  *
5702  */
5703 void
5704 GNUNET_TESTING_daemons_continue_startup(struct GNUNET_TESTING_PeerGroup *pg)
5705 {
5706   unsigned int i;
5707
5708 #if USE_START_HELPER
5709   if ((pg->num_hosts > 0) && (pg->hostkey_data != NULL))
5710     {
5711       struct PeerStartHelperContext *helper;
5712       pg->starting = pg->num_hosts;
5713       for (i = 0; i < pg->num_hosts; i++)
5714         {
5715           helper = GNUNET_malloc(sizeof(struct PeerStartHelperContext));
5716           helper->pg = pg;
5717           helper->host = &pg->hosts[i];
5718           GNUNET_SCHEDULER_add_now(&start_peer_helper, helper);
5719         }
5720     }
5721   else
5722     {
5723       pg->starting = 0;
5724       for (i = 0; i < pg->total; i++)
5725         {
5726           GNUNET_SCHEDULER_add_now (&internal_continue_startup,
5727                                     &pg->peers[i].internal_context);
5728         }
5729     }
5730 #else
5731   pg->starting = 0;
5732   for (i = 0; i < pg->total; i++)
5733     {
5734       GNUNET_SCHEDULER_add_now (&internal_continue_startup,
5735                                 &pg->peers[i].internal_context);
5736     }
5737 #endif
5738 }
5739
5740 #if USE_START_HELPER
5741 static void
5742 call_hostkey_callbacks (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5743 {
5744   struct GNUNET_TESTING_PeerGroup *pg = cls;
5745   unsigned int i;
5746   for (i = 0; i < pg->total; i++)
5747     {
5748       if (pg->peers[i].internal_context.hostkey_callback != NULL)
5749         pg->peers[i].internal_context.hostkey_callback (pg->peers[i].internal_context.hostkey_cls,
5750                                                            &pg->peers[i].daemon->id,
5751                                                            pg->peers[i].daemon,
5752                                                            NULL);
5753     }
5754
5755   if (pg->peers[0].internal_context.hostkey_callback == NULL)
5756     GNUNET_TESTING_daemons_continue_startup (pg);
5757 }
5758 #endif
5759
5760 /**
5761  * Start count gnunet instances with the same set of transports and
5762  * applications.  The port numbers (any option called "PORT") will be
5763  * adjusted to ensure that no two peers running on the same system
5764  * have the same port(s) in their respective configurations.
5765  *
5766  * @param cfg configuration template to use
5767  * @param total number of daemons to start
5768  * @param max_concurrent_connections for testing, how many peers can
5769  *                                   we connect to simultaneously
5770  * @param max_concurrent_ssh when starting with ssh, how many ssh
5771  *        connections will we allow at once (based on remote hosts allowed!)
5772  * @param timeout total time allowed for peers to start
5773  * @param hostkey_callback function to call on each peers hostkey generation
5774  *        if NULL, peers will be started by this call, if non-null,
5775  *        GNUNET_TESTING_daemons_continue_startup must be called after
5776  *        successful hostkey generation
5777  * @param hostkey_cls closure for hostkey callback
5778  * @param cb function to call on each daemon that was started
5779  * @param cb_cls closure for cb
5780  * @param connect_callback function to call each time two hosts are connected
5781  * @param connect_callback_cls closure for connect_callback
5782  * @param hostnames linked list of host structs to use to start peers on
5783  *                  (NULL to run on localhost only)
5784  *
5785  * @return NULL on error, otherwise handle to control peer group
5786  */
5787 struct GNUNET_TESTING_PeerGroup *
5788 GNUNET_TESTING_daemons_start(const struct GNUNET_CONFIGURATION_Handle *cfg,
5789                              unsigned int total,
5790                              unsigned int max_concurrent_connections,
5791                              unsigned int max_concurrent_ssh,
5792                              struct GNUNET_TIME_Relative timeout,
5793                              GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback,
5794                              void *hostkey_cls,
5795                              GNUNET_TESTING_NotifyDaemonRunning cb,
5796                              void *cb_cls,
5797                              GNUNET_TESTING_NotifyConnection connect_callback,
5798                              void *connect_callback_cls,
5799                              const struct GNUNET_TESTING_Host *hostnames)
5800 {
5801   struct GNUNET_TESTING_PeerGroup *pg;
5802   const struct GNUNET_TESTING_Host *hostpos;
5803   const char *hostname;
5804   const char *username;
5805   char *baseservicehome;
5806   char *newservicehome;
5807   char *tmpdir;
5808   char *hostkeys_file;
5809   char *arg;
5810   char *ssh_port_str;
5811   struct GNUNET_DISK_FileHandle *fd;
5812   struct GNUNET_CONFIGURATION_Handle *pcfg;
5813   unsigned int off;
5814   struct OutstandingSSH *ssh_entry;
5815   unsigned int hostcnt;
5816   unsigned int i;
5817   uint16_t minport;
5818   uint16_t sshport;
5819   uint32_t upnum;
5820   uint32_t fdnum;
5821   uint64_t fs;
5822   uint64_t total_hostkeys;
5823   struct GNUNET_OS_Process *proc;
5824
5825   username = NULL;
5826   if (0 == total)
5827     {
5828       GNUNET_break (0);
5829       return NULL;
5830     }
5831
5832   upnum = 0;
5833   fdnum = 0;
5834   pg = GNUNET_malloc (sizeof (struct GNUNET_TESTING_PeerGroup));
5835   pg->cfg = cfg;
5836   pg->notify_connection = connect_callback;
5837   pg->notify_connection_cls = connect_callback_cls;
5838   pg->total = total;
5839   pg->max_timeout = GNUNET_TIME_relative_to_absolute (timeout);
5840   pg->peers = GNUNET_malloc (total * sizeof (struct PeerData));
5841   pg->max_outstanding_connections = max_concurrent_connections;
5842   pg->max_concurrent_ssh = max_concurrent_ssh;
5843   if (NULL != hostnames)
5844     {
5845       off = 0;
5846       hostpos = hostnames;
5847       while (hostpos != NULL)
5848         {
5849           hostpos = hostpos->next;
5850           off++;
5851         }
5852       pg->hosts = GNUNET_malloc (off * sizeof (struct HostData));
5853       off = 0;
5854
5855       hostpos = hostnames;
5856       while (hostpos != NULL)
5857         {
5858           pg->hosts[off].minport = LOW_PORT;
5859           pg->hosts[off].hostname = GNUNET_strdup (hostpos->hostname);
5860           if (hostpos->username != NULL)
5861             pg->hosts[off].username = GNUNET_strdup (hostpos->username);
5862           pg->hosts[off].sshport = hostpos->port;
5863           hostpos = hostpos->next;
5864           off++;
5865         }
5866
5867       if (off == 0)
5868         {
5869           pg->hosts = NULL;
5870         }
5871       hostcnt = off;
5872       minport = 0;
5873       pg->num_hosts = off;
5874     }
5875   else
5876     {
5877       hostcnt = 0;
5878       minport = LOW_PORT;
5879     }
5880
5881   /* Create the servicehome directory for each remote peer */
5882   GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (cfg, "PATHS", "SERVICEHOME",
5883                                                                     &baseservicehome));
5884   for (i = 0; i < pg->num_hosts; i++)
5885     {
5886       ssh_entry = GNUNET_malloc(sizeof(struct OutstandingSSH));
5887       ssh_entry->hostname = pg->hosts[i].hostname; /* Don't free! */
5888       GNUNET_CONTAINER_DLL_insert(pg->ssh_head, pg->ssh_tail, ssh_entry);
5889       GNUNET_asprintf(&tmpdir, "%s/%s", baseservicehome, pg->hosts[i].hostname);
5890       if (NULL != pg->hosts[i].username)
5891         GNUNET_asprintf (&arg, "%s@%s", pg->hosts[i].username,
5892                          pg->hosts[i].hostname);
5893       else
5894         GNUNET_asprintf (&arg, "%s", pg->hosts[i].hostname);
5895       if (pg->hosts[i].sshport != 0)
5896         {
5897           GNUNET_asprintf (&ssh_port_str, "%d", pg->hosts[i].sshport);
5898           proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", "-P",
5899                                           ssh_port_str,
5900 #if !DEBUG_TESTING
5901                                           "-q",
5902 #endif
5903                                           arg, "mkdir -p", tmpdir,
5904                                           NULL);
5905         }
5906       else
5907         proc = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh", arg,
5908                                         "mkdir -p", tmpdir, NULL);
5909       GNUNET_assert(proc != NULL);
5910       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5911                   "Creating remote dir with command ssh %s %s %s\n", arg,
5912                   " mkdir -p ", tmpdir);
5913       GNUNET_free(tmpdir);
5914       GNUNET_free(arg);
5915       GNUNET_OS_process_wait (proc);
5916       GNUNET_OS_process_close(proc);
5917     }
5918   GNUNET_free(baseservicehome);
5919
5920   if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string (cfg, "TESTING",
5921                                                            "HOSTKEYSFILE",
5922                                                            &hostkeys_file))
5923     {
5924       if (GNUNET_YES != GNUNET_DISK_file_test (hostkeys_file))
5925         GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5926                     _("Could not read hostkeys file!\n"));
5927       else
5928         {
5929           /* Check hostkey file size, read entire thing into memory */
5930           fd = GNUNET_DISK_file_open (hostkeys_file,
5931                                       GNUNET_DISK_OPEN_READ,
5932                                       GNUNET_DISK_PERM_NONE);
5933           if (NULL == fd)
5934             {
5935               GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
5936                                         "open",
5937                                         hostkeys_file);
5938               GNUNET_free (hostkeys_file);
5939               for (i=0;i<pg->num_hosts;i++)
5940                 {
5941                   GNUNET_free (pg->hosts[i].hostname);
5942                   GNUNET_free_non_null (pg->hosts[i].username);
5943                 }
5944               GNUNET_free (pg->peers);
5945               GNUNET_free (pg->hosts);
5946               GNUNET_free (pg);
5947               return NULL;
5948             }
5949
5950           if (GNUNET_YES != GNUNET_DISK_file_size (hostkeys_file, &fs,
5951                                                    GNUNET_YES))
5952             fs = 0;
5953
5954           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5955                       "Found file size %llu for hostkeys, expect hostkeys to be size %d\n",
5956                       fs, HOSTKEYFILESIZE);
5957
5958           if (0 != (fs % HOSTKEYFILESIZE))
5959             {
5960               GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5961                           "File size %llu seems incorrect for hostkeys...\n",
5962                           fs);
5963             }
5964           else
5965             {
5966               total_hostkeys = fs / HOSTKEYFILESIZE;
5967               GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5968                           "Will read %llu hostkeys from file\n",
5969                           total_hostkeys);
5970               pg->hostkey_data = GNUNET_malloc_large (fs);
5971               GNUNET_assert (fs == GNUNET_DISK_file_read (fd, pg->hostkey_data, fs));
5972             }
5973           GNUNET_assert(GNUNET_OK == GNUNET_DISK_file_close(fd));
5974         }
5975       GNUNET_free(hostkeys_file);
5976     }
5977
5978   for (off = 0; off < total; off++)
5979     {
5980       if (hostcnt > 0)
5981         {
5982           hostname = pg->hosts[off % hostcnt].hostname;
5983           username = pg->hosts[off % hostcnt].username;
5984           sshport = pg->hosts[off % hostcnt].sshport;
5985           pcfg = make_config (cfg, off, &pg->hosts[off % hostcnt].minport,
5986                               &upnum, hostname, &fdnum);
5987         }
5988       else
5989         {
5990           hostname = NULL;
5991           username = NULL;
5992           sshport = 0;
5993           pcfg = make_config (cfg, off, &minport, &upnum, hostname, &fdnum);
5994         }
5995
5996       if (NULL == pcfg)
5997         {
5998           GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _
5999           ("Could not create configuration for peer number %u on `%s'!\n"),
6000                       off, hostname == NULL ? "localhost" : hostname);
6001           continue;
6002         }
6003
6004       if (GNUNET_YES
6005           == GNUNET_CONFIGURATION_get_value_string (pcfg, "PATHS",
6006                                                     "SERVICEHOME",
6007                                                     &baseservicehome))
6008         {
6009           if (hostname != NULL)
6010             GNUNET_asprintf (&newservicehome, "%s/%s/%d/", baseservicehome, hostname, off);
6011           else
6012             GNUNET_asprintf (&newservicehome, "%s/%d/", baseservicehome, off);
6013 #if !USE_START_HELPER
6014           GNUNET_free (baseservicehome);
6015 #endif
6016         }
6017       else
6018         {
6019           tmpdir = getenv ("TMPDIR");
6020           tmpdir = tmpdir ? tmpdir : "/tmp";
6021           if (hostname != NULL)
6022             GNUNET_asprintf (&newservicehome, "%s/%s/%s/%d/", tmpdir, hostname,
6023                              "gnunet-testing-test-test", off);
6024           else
6025             GNUNET_asprintf (&newservicehome, "%s/%s/%d/", tmpdir,
6026                              "gnunet-testing-test-test", off);
6027         }
6028       GNUNET_CONFIGURATION_set_value_string (pcfg, "PATHS", "SERVICEHOME",
6029                                              newservicehome);
6030       GNUNET_free (newservicehome);
6031       pg->peers[off].cfg = pcfg;
6032       pg->peers[off].pg = pg;
6033       pg->peers[off].internal_context.peer = &pg->peers[off];
6034       pg->peers[off].internal_context.timeout = timeout;
6035       pg->peers[off].internal_context.hostname = hostname;
6036       pg->peers[off].internal_context.username = username;
6037       pg->peers[off].internal_context.sshport = sshport;
6038       if (pg->hostkey_data != NULL)
6039         pg->peers[off].internal_context.hostkey = &pg->hostkey_data[off
6040             * HOSTKEYFILESIZE];
6041       pg->peers[off].internal_context.hostkey_callback = hostkey_callback;
6042       pg->peers[off].internal_context.hostkey_cls = hostkey_cls;
6043       pg->peers[off].internal_context.start_cb = cb;
6044       pg->peers[off].internal_context.start_cb_cls = cb_cls;
6045 #if !USE_START_HELPER
6046       GNUNET_SCHEDULER_add_now (&internal_start,
6047                                 &pg->peers[off].internal_context);
6048 #else
6049       if ((pg->hostkey_data != NULL) && (hostcnt > 0))
6050         {
6051           pg->peers[off].daemon = GNUNET_TESTING_daemon_start (pcfg,
6052                                        timeout,
6053                                        GNUNET_YES,
6054                                        hostname,
6055                                        username,
6056                                        sshport,
6057                                        pg->peers[off].internal_context.hostkey,
6058                                        &internal_hostkey_callback,
6059                                        &pg->peers[off].internal_context,
6060                                        &internal_startup_callback,
6061                                        &pg->peers[off].internal_context);
6062           /**
6063            * At this point, given that we had a hostkeyfile,
6064            * we can call the hostkey callback!
6065            * But first, we should copy (rsync) all of the configs
6066            * and hostkeys to the remote peers.  Then let topology
6067            * creation happen, then call the peer start helper processes,
6068            * then set pg->whatever_phase for each peer and let them
6069            * enter the fsm to get the HELLO's for peers and start connecting.
6070            */
6071         }
6072       else
6073         {
6074           GNUNET_SCHEDULER_add_now (&internal_start,
6075                                     &pg->peers[off].internal_context);
6076         }
6077
6078 #endif
6079     }
6080
6081 #if USE_START_HELPER /* Now the peergroup has been set up, hostkeys and configs written to files. */
6082   if ((pg->hostkey_data != NULL) && (hostcnt > 0))
6083     {
6084       for (off = 0; off < hostcnt; off++)
6085         {
6086           GNUNET_asprintf(&newservicehome, "%s/%s/", baseservicehome, pg->hosts[off].hostname);
6087
6088           if (NULL != username)
6089             GNUNET_asprintf (&arg, "%s@%s:%s/%s", username, pg->hosts[off].hostname, baseservicehome, pg->hosts[off].hostname);
6090           else
6091             GNUNET_asprintf (&arg, "%s:%s/%s", pg->hosts[off].hostname, baseservicehome, pg->hosts[off].hostname);
6092
6093           /* FIXME: Doesn't support ssh_port option! */
6094           proc = GNUNET_OS_start_process (NULL, NULL, "rsync", "rsync", "-r", newservicehome, arg, NULL);
6095
6096           GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "copying directory with command rsync -r %s %s\n", newservicehome, arg);
6097
6098           GNUNET_free (arg);
6099           if (NULL == proc)
6100             {
6101               GNUNET_log (
6102                           GNUNET_ERROR_TYPE_ERROR,
6103                           _
6104                           ("Could not start `%s' process to copy configuration directory.\n"),
6105                           "scp");
6106               GNUNET_assert(0);
6107             }
6108           GNUNET_OS_process_wait (proc);
6109           GNUNET_OS_process_close (proc);
6110         }
6111       /* Now all the configuration files and hostkeys are copied to the remote host.  Call the hostkey callback for each peer! */
6112       GNUNET_SCHEDULER_add_now(&call_hostkey_callbacks, pg);
6113     }
6114   GNUNET_free (baseservicehome);
6115 #endif
6116   return pg;
6117 }
6118
6119 /*
6120  * Get a daemon by number, so callers don't have to do nasty
6121  * offsetting operation.
6122  */
6123 struct GNUNET_TESTING_Daemon *
6124 GNUNET_TESTING_daemon_get(struct GNUNET_TESTING_PeerGroup *pg,
6125                           unsigned int position)
6126 {
6127   if (position < pg->total)
6128     return pg->peers[position].daemon;
6129   return NULL;
6130 }
6131
6132 /*
6133  * Get a daemon by peer identity, so callers can
6134  * retrieve the daemon without knowing it's offset.
6135  *
6136  * @param pg the peer group to retrieve the daemon from
6137  * @param peer_id the peer identity of the daemon to retrieve
6138  *
6139  * @return the daemon on success, or NULL if no such peer identity is found
6140  */
6141 struct GNUNET_TESTING_Daemon *
6142 GNUNET_TESTING_daemon_get_by_id(struct GNUNET_TESTING_PeerGroup *pg,
6143                                 struct GNUNET_PeerIdentity *peer_id)
6144 {
6145   unsigned int i;
6146
6147   for (i = 0; i < pg->total; i++)
6148     {
6149       if (0 == memcmp (&pg->peers[i].daemon->id, peer_id,
6150                        sizeof(struct GNUNET_PeerIdentity)))
6151         return pg->peers[i].daemon;
6152     }
6153   return NULL;
6154 }
6155
6156 /**
6157  * Prototype of a function that will be called when a
6158  * particular operation was completed the testing library.
6159  *
6160  * @param cls closure (a struct RestartContext)
6161  * @param id id of the peer that was restarted
6162  * @param cfg handle to the configuration of the peer
6163  * @param d handle to the daemon that was restarted
6164  * @param emsg NULL on success
6165  */
6166 static void
6167 restart_callback(void *cls, const struct GNUNET_PeerIdentity *id,
6168                  const struct GNUNET_CONFIGURATION_Handle *cfg,
6169                  struct GNUNET_TESTING_Daemon *d, const char *emsg)
6170 {
6171   struct RestartContext *restart_context = cls;
6172
6173   if (emsg == NULL)
6174     {
6175       restart_context->peers_restarted++;
6176     }
6177   else
6178     {
6179       restart_context->peers_restart_failed++;
6180     }
6181
6182   if (restart_context->peers_restarted == restart_context->peer_group->total)
6183     {
6184       restart_context->callback (restart_context->callback_cls, NULL);
6185       GNUNET_free (restart_context);
6186     }
6187   else if (restart_context->peers_restart_failed
6188       + restart_context->peers_restarted == restart_context->peer_group->total)
6189     {
6190       restart_context->callback (restart_context->callback_cls,
6191                                  "Failed to restart peers!");
6192       GNUNET_free (restart_context);
6193     }
6194
6195 }
6196
6197 /**
6198  * Callback for informing us about a successful
6199  * or unsuccessful churn stop call.
6200  *
6201  * @param cls a ChurnContext
6202  * @param emsg NULL on success, non-NULL on failure
6203  *
6204  */
6205 static void
6206 churn_stop_callback(void *cls, const char *emsg)
6207 {
6208   struct ShutdownContext *shutdown_ctx = cls;
6209   struct ChurnContext *churn_ctx = shutdown_ctx->cb_cls;
6210   unsigned int total_left;
6211   char *error_message;
6212
6213   error_message = NULL;
6214   shutdown_ctx->outstanding--;
6215
6216   if (emsg != NULL)
6217     {
6218       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6219                   "Churn stop callback failed with error `%s'\n", emsg);
6220       churn_ctx->num_failed_stop++;
6221     }
6222   else
6223     {
6224       churn_ctx->num_to_stop--;
6225     }
6226
6227 #if DEBUG_CHURN
6228   GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6229       "Stopped peer, %d left.\n", churn_ctx->num_to_stop);
6230 #endif
6231   total_left = (churn_ctx->num_to_stop - churn_ctx->num_failed_stop)
6232       + (churn_ctx->num_to_start - churn_ctx->num_failed_start);
6233
6234   if (total_left == 0)
6235     {
6236       if ((churn_ctx->num_failed_stop > 0) || (churn_ctx->num_failed_start > 0))
6237         {
6238           GNUNET_asprintf (
6239                            &error_message,
6240                            "Churn didn't complete successfully, %u peers failed to start %u peers failed to be stopped!",
6241                            churn_ctx->num_failed_start,
6242                            churn_ctx->num_failed_stop);
6243         }
6244       churn_ctx->cb (churn_ctx->cb_cls, error_message);
6245       GNUNET_free_non_null (error_message);
6246       GNUNET_free (churn_ctx);
6247       GNUNET_free (shutdown_ctx);
6248     }
6249 }
6250
6251 /**
6252  * Count the number of running peers.
6253  *
6254  * @param pg handle for the peer group
6255  *
6256  * @return the number of currently running peers in the peer group
6257  */
6258 unsigned int
6259 GNUNET_TESTING_daemons_running(struct GNUNET_TESTING_PeerGroup *pg)
6260 {
6261   unsigned int i;
6262   unsigned int running = 0;
6263   for (i = 0; i < pg->total; i++)
6264     {
6265       if (pg->peers[i].daemon->running == GNUNET_YES)
6266         {
6267           GNUNET_assert (running != -1);
6268           running++;
6269         }
6270     }
6271   return running;
6272 }
6273
6274 /**
6275  * Task to rate limit the number of outstanding peer shutdown
6276  * requests.  This is necessary for making sure we don't do
6277  * too many ssh connections at once, but is generally nicer
6278  * to any system as well (graduated task starts, as opposed
6279  * to calling gnunet-arm N times all at once).
6280  */
6281 static void
6282 schedule_churn_shutdown_task(void *cls,
6283                              const struct GNUNET_SCHEDULER_TaskContext *tc)
6284 {
6285   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6286   struct ShutdownContext *shutdown_ctx;
6287   struct ChurnContext *churn_ctx;
6288   GNUNET_assert (peer_shutdown_ctx != NULL);
6289   shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6290   GNUNET_assert (shutdown_ctx != NULL);
6291   churn_ctx = (struct ChurnContext *) shutdown_ctx->cb_cls;
6292   if (shutdown_ctx->outstanding > churn_ctx->pg->max_concurrent_ssh)
6293     GNUNET_SCHEDULER_add_delayed (
6294                                   GNUNET_TIME_relative_multiply (
6295                                                                  GNUNET_TIME_UNIT_MILLISECONDS,
6296                                                                  100),
6297                                   &schedule_churn_shutdown_task,
6298                                   peer_shutdown_ctx);
6299   else
6300     {
6301       shutdown_ctx->outstanding++;
6302       GNUNET_TESTING_daemon_stop (peer_shutdown_ctx->daemon,
6303                                   shutdown_ctx->timeout, shutdown_ctx->cb,
6304                                   shutdown_ctx, GNUNET_NO, GNUNET_YES);
6305       GNUNET_free (peer_shutdown_ctx);
6306     }
6307 }
6308
6309
6310 /**
6311  * Simulate churn by stopping some peers (and possibly
6312  * re-starting others if churn is called multiple times).  This
6313  * function can only be used to create leave-join churn (peers "never"
6314  * leave for good).  First "voff" random peers that are currently
6315  * online will be taken offline; then "von" random peers that are then
6316  * offline will be put back online.  No notifications will be
6317  * generated for any of these operations except for the callback upon
6318  * completion.
6319  *
6320  * @param pg handle for the peer group
6321  * @param voff number of peers that should go offline
6322  * @param von number of peers that should come back online;
6323  *            must be zero on first call (since "testbed_start"
6324  *            always starts all of the peers)
6325  * @param timeout how long to wait for operations to finish before
6326  *        giving up
6327  * @param cb function to call at the end
6328  * @param cb_cls closure for cb
6329  */
6330 void
6331 GNUNET_TESTING_daemons_churn(struct GNUNET_TESTING_PeerGroup *pg,
6332                              unsigned int voff, unsigned int von,
6333                              struct GNUNET_TIME_Relative timeout,
6334                              GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6335 {
6336   struct ChurnContext *churn_ctx;
6337   struct ShutdownContext *shutdown_ctx;
6338   struct PeerShutdownContext *peer_shutdown_ctx;
6339   struct PeerRestartContext *peer_restart_ctx;
6340   struct ChurnRestartContext *churn_startup_ctx;
6341
6342   unsigned int running;
6343   unsigned int stopped;
6344   unsigned int total_running;
6345   unsigned int total_stopped;
6346   unsigned int i;
6347   unsigned int *running_arr;
6348   unsigned int *stopped_arr;
6349   unsigned int *running_permute;
6350   unsigned int *stopped_permute;
6351
6352   shutdown_ctx = NULL;
6353   peer_shutdown_ctx = NULL;
6354   peer_restart_ctx = NULL;
6355   churn_startup_ctx = NULL;
6356
6357   running = 0;
6358   stopped = 0;
6359
6360   if ((von == 0) && (voff == 0)) /* No peers at all? */
6361     {
6362       cb (cb_cls, NULL);
6363       return;
6364     }
6365
6366   for (i = 0; i < pg->total; i++)
6367     {
6368       if (pg->peers[i].daemon->running == GNUNET_YES)
6369         {
6370           GNUNET_assert (running != -1);
6371           running++;
6372         }
6373       else
6374         {
6375           GNUNET_assert (stopped != -1);
6376           stopped++;
6377         }
6378     }
6379
6380   if (voff > running)
6381     {
6382       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6383                   "Trying to stop more peers than are currently running!\n");
6384       cb (cb_cls, "Trying to stop more peers than are currently running!");
6385       return;
6386     }
6387
6388   if (von > stopped)
6389     {
6390       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6391                   "Trying to start more peers than are currently stopped!\n");
6392       cb (cb_cls, "Trying to start more peers than are currently stopped!");
6393       return;
6394     }
6395
6396   churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6397
6398   running_arr = NULL;
6399   if (running > 0)
6400     running_arr = GNUNET_malloc (running * sizeof (unsigned int));
6401
6402   stopped_arr = NULL;
6403   if (stopped > 0)
6404     stopped_arr = GNUNET_malloc (stopped * sizeof (unsigned int));
6405
6406   running_permute = NULL;
6407   stopped_permute = NULL;
6408
6409   if (running > 0)
6410     running_permute = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
6411                                                     running);
6412   if (stopped > 0)
6413     stopped_permute = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_WEAK,
6414                                                     stopped);
6415
6416   total_running = running;
6417   total_stopped = stopped;
6418   running = 0;
6419   stopped = 0;
6420
6421   churn_ctx->num_to_start = von;
6422   churn_ctx->num_to_stop = voff;
6423   churn_ctx->cb = cb;
6424   churn_ctx->cb_cls = cb_cls;
6425   churn_ctx->pg = pg;
6426
6427   for (i = 0; i < pg->total; i++)
6428     {
6429       if (pg->peers[i].daemon->running == GNUNET_YES)
6430         {
6431           GNUNET_assert ((running_arr != NULL) && (total_running > running));
6432           running_arr[running] = i;
6433           running++;
6434         }
6435       else
6436         {
6437           GNUNET_assert ((stopped_arr != NULL) && (total_stopped > stopped));
6438           stopped_arr[stopped] = i;
6439           stopped++;
6440         }
6441     }
6442
6443   GNUNET_assert (running >= voff);
6444   if (voff > 0)
6445     {
6446       shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6447       shutdown_ctx->cb = &churn_stop_callback;
6448       shutdown_ctx->cb_cls = churn_ctx;
6449       shutdown_ctx->total_peers = voff;
6450       shutdown_ctx->timeout = timeout;
6451     }
6452
6453   for (i = 0; i < voff; i++)
6454     {
6455 #if DEBUG_CHURN
6456       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Stopping peer %d!\n",
6457           running_permute[i]);
6458 #endif
6459       GNUNET_assert (running_arr != NULL);
6460       peer_shutdown_ctx = GNUNET_malloc (sizeof (struct PeerShutdownContext));
6461       peer_shutdown_ctx->daemon
6462           = pg->peers[running_arr[running_permute[i]]].daemon;
6463       peer_shutdown_ctx->shutdown_ctx = shutdown_ctx;
6464       GNUNET_SCHEDULER_add_now (&schedule_churn_shutdown_task,
6465                                 peer_shutdown_ctx);
6466
6467       /*
6468        GNUNET_TESTING_daemon_stop (pg->peers[running_arr[running_permute[i]]].daemon,
6469        timeout,
6470        &churn_stop_callback, churn_ctx,
6471        GNUNET_NO, GNUNET_YES); */
6472     }
6473
6474   GNUNET_assert (stopped >= von);
6475   if (von > 0)
6476     {
6477       churn_startup_ctx = GNUNET_malloc (sizeof (struct ChurnRestartContext));
6478       churn_startup_ctx->churn_ctx = churn_ctx;
6479       churn_startup_ctx->timeout = timeout;
6480       churn_startup_ctx->pg = pg;
6481     }
6482   for (i = 0; i < von; i++)
6483     {
6484 #if DEBUG_CHURN
6485       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Starting up peer %d!\n",
6486           stopped_permute[i]);
6487 #endif
6488       GNUNET_assert (stopped_arr != NULL);
6489       peer_restart_ctx = GNUNET_malloc (sizeof (struct PeerRestartContext));
6490       peer_restart_ctx->churn_restart_ctx = churn_startup_ctx;
6491       peer_restart_ctx->daemon
6492           = pg->peers[stopped_arr[stopped_permute[i]]].daemon;
6493       GNUNET_SCHEDULER_add_now (&schedule_churn_restart, peer_restart_ctx);
6494       /*
6495        GNUNET_TESTING_daemon_start_stopped(pg->peers[stopped_arr[stopped_permute[i]]].daemon,
6496        timeout, &churn_start_callback, churn_ctx); */
6497     }
6498
6499   GNUNET_free_non_null (running_arr);
6500   GNUNET_free_non_null (stopped_arr);
6501   GNUNET_free_non_null (running_permute);
6502   GNUNET_free_non_null (stopped_permute);
6503 }
6504
6505
6506 /**
6507  * Restart all peers in the given group.
6508  *
6509  * @param pg the handle to the peer group
6510  * @param callback function to call on completion (or failure)
6511  * @param callback_cls closure for the callback function
6512  */
6513 void
6514 GNUNET_TESTING_daemons_restart(struct GNUNET_TESTING_PeerGroup *pg,
6515                                GNUNET_TESTING_NotifyCompletion callback,
6516                                void *callback_cls)
6517 {
6518   struct RestartContext *restart_context;
6519   unsigned int off;
6520
6521   if (pg->total > 0)
6522     {
6523       restart_context = GNUNET_malloc (sizeof (struct RestartContext));
6524       restart_context->peer_group = pg;
6525       restart_context->peers_restarted = 0;
6526       restart_context->callback = callback;
6527       restart_context->callback_cls = callback_cls;
6528
6529       for (off = 0; off < pg->total; off++)
6530         {
6531           GNUNET_TESTING_daemon_restart (pg->peers[off].daemon,
6532                                          &restart_callback, restart_context);
6533         }
6534     }
6535 }
6536
6537
6538 /**
6539  * Start or stop an individual peer from the given group.
6540  *
6541  * @param pg handle to the peer group
6542  * @param offset which peer to start or stop
6543  * @param desired_status GNUNET_YES to have it running, GNUNET_NO to stop it
6544  * @param timeout how long to wait for shutdown
6545  * @param cb function to call at the end
6546  * @param cb_cls closure for cb
6547  */
6548 void
6549 GNUNET_TESTING_daemons_vary(struct GNUNET_TESTING_PeerGroup *pg,
6550                             unsigned int offset, int desired_status,
6551                             struct GNUNET_TIME_Relative timeout,
6552                             GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6553 {
6554   struct ShutdownContext *shutdown_ctx;
6555   struct ChurnRestartContext *startup_ctx;
6556   struct ChurnContext *churn_ctx;
6557
6558   if (GNUNET_NO == desired_status)
6559     {
6560       if (NULL != pg->peers[offset].daemon)
6561         {
6562           shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6563           churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6564           churn_ctx->num_to_start = 0;
6565           churn_ctx->num_to_stop = 1;
6566           churn_ctx->cb = cb;
6567           churn_ctx->cb_cls = cb_cls;
6568           shutdown_ctx->cb_cls = churn_ctx;
6569           GNUNET_TESTING_daemon_stop (pg->peers[offset].daemon, timeout,
6570                                       &churn_stop_callback, shutdown_ctx,
6571                                       GNUNET_NO, GNUNET_YES);
6572         }
6573     }
6574   else if (GNUNET_YES == desired_status)
6575     {
6576       if (NULL == pg->peers[offset].daemon)
6577         {
6578           startup_ctx = GNUNET_malloc (sizeof (struct ChurnRestartContext));
6579           churn_ctx = GNUNET_malloc (sizeof (struct ChurnContext));
6580           churn_ctx->num_to_start = 1;
6581           churn_ctx->num_to_stop = 0;
6582           churn_ctx->cb = cb;
6583           churn_ctx->cb_cls = cb_cls;
6584           startup_ctx->churn_ctx = churn_ctx;
6585           GNUNET_TESTING_daemon_start_stopped (pg->peers[offset].daemon,
6586                                                timeout, &churn_start_callback,
6587                                                startup_ctx);
6588         }
6589     }
6590   else
6591     GNUNET_break (0);
6592 }
6593
6594
6595 /**
6596  * Callback for shutting down peers in a peer group.
6597  *
6598  * @param cls closure (struct ShutdownContext)
6599  * @param emsg NULL on success
6600  */
6601 static void
6602 internal_shutdown_callback(void *cls, const char *emsg)
6603 {
6604   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6605   struct ShutdownContext *shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6606   unsigned int off;
6607   struct OutstandingSSH *ssh_pos;
6608
6609   shutdown_ctx->outstanding--;
6610   if (peer_shutdown_ctx->daemon->hostname != NULL)
6611     decrement_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6612                                    shutdown_ctx->pg);
6613
6614   if (emsg == NULL)
6615     {
6616       shutdown_ctx->peers_down++;
6617     }
6618   else
6619     {
6620       shutdown_ctx->peers_failed++;
6621     }
6622
6623   if ((shutdown_ctx->cb != NULL) && (shutdown_ctx->peers_down
6624       + shutdown_ctx->peers_failed == shutdown_ctx->total_peers))
6625     {
6626       if (shutdown_ctx->peers_failed > 0)
6627         shutdown_ctx->cb (shutdown_ctx->cb_cls,
6628                           "Not all peers successfully shut down!");
6629       else
6630         shutdown_ctx->cb (shutdown_ctx->cb_cls, NULL);
6631
6632       GNUNET_free (shutdown_ctx->pg->peers);
6633       GNUNET_free_non_null(shutdown_ctx->pg->hostkey_data);
6634       for (off = 0; off < shutdown_ctx->pg->num_hosts; off++)
6635         {
6636           GNUNET_free (shutdown_ctx->pg->hosts[off].hostname);
6637           GNUNET_free_non_null (shutdown_ctx->pg->hosts[off].username);
6638         }
6639       GNUNET_free_non_null (shutdown_ctx->pg->hosts);
6640       while (NULL != (ssh_pos = shutdown_ctx->pg->ssh_head))
6641         {
6642           GNUNET_CONTAINER_DLL_remove(shutdown_ctx->pg->ssh_head, shutdown_ctx->pg->ssh_tail, ssh_pos);
6643           GNUNET_free(ssh_pos);
6644         }
6645       GNUNET_free (shutdown_ctx->pg);
6646       GNUNET_free (shutdown_ctx);
6647     }
6648   GNUNET_free(peer_shutdown_ctx);
6649 }
6650
6651
6652 /**
6653  * Task to rate limit the number of outstanding peer shutdown
6654  * requests.  This is necessary for making sure we don't do
6655  * too many ssh connections at once, but is generally nicer
6656  * to any system as well (graduated task starts, as opposed
6657  * to calling gnunet-arm N times all at once).
6658  */
6659 static void
6660 schedule_shutdown_task(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6661 {
6662   struct PeerShutdownContext *peer_shutdown_ctx = cls;
6663   struct ShutdownContext *shutdown_ctx;
6664
6665   GNUNET_assert (peer_shutdown_ctx != NULL);
6666   shutdown_ctx = peer_shutdown_ctx->shutdown_ctx;
6667   GNUNET_assert (shutdown_ctx != NULL);
6668
6669   if ((shutdown_ctx->outstanding < shutdown_ctx->pg->max_concurrent_ssh)
6670       || ((peer_shutdown_ctx->daemon->hostname != NULL)
6671           && (count_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6672                                          shutdown_ctx->pg)
6673               < shutdown_ctx->pg->max_concurrent_ssh)))
6674     {
6675       if (peer_shutdown_ctx->daemon->hostname != NULL)
6676         increment_outstanding_at_host (peer_shutdown_ctx->daemon->hostname,
6677                                        shutdown_ctx->pg);
6678       shutdown_ctx->outstanding++;
6679       GNUNET_TESTING_daemon_stop (peer_shutdown_ctx->daemon,
6680                                   shutdown_ctx->timeout,
6681                                   &internal_shutdown_callback, peer_shutdown_ctx,
6682                                   GNUNET_YES, GNUNET_NO);
6683     }
6684   else
6685     GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
6686                                                                  100),
6687                                   &schedule_shutdown_task, peer_shutdown_ctx);
6688
6689 }
6690
6691
6692 /**
6693  * Shutdown all peers started in the given group.
6694  *
6695  * @param pg handle to the peer group
6696  * @param timeout how long to wait for shutdown
6697  * @param cb callback to notify upon success or failure
6698  * @param cb_cls closure for cb
6699  */
6700 void
6701 GNUNET_TESTING_daemons_stop(struct GNUNET_TESTING_PeerGroup *pg,
6702                             struct GNUNET_TIME_Relative timeout,
6703                             GNUNET_TESTING_NotifyCompletion cb, void *cb_cls)
6704 {
6705   unsigned int off;
6706   struct ShutdownContext *shutdown_ctx;
6707   struct PeerShutdownContext *peer_shutdown_ctx;
6708 #if OLD
6709   struct PeerConnection *conn_iter;
6710   struct PeerConnection *temp_conn;
6711 #endif
6712
6713   GNUNET_assert (pg->total > 0);
6714
6715   shutdown_ctx = GNUNET_malloc (sizeof (struct ShutdownContext));
6716   shutdown_ctx->cb = cb;
6717   shutdown_ctx->cb_cls = cb_cls;
6718   shutdown_ctx->total_peers = pg->total;
6719   shutdown_ctx->timeout = timeout;
6720   shutdown_ctx->pg = pg;
6721   /* shtudown_ctx->outstanding = 0; */
6722
6723   for (off = 0; off < pg->total; off++)
6724     {
6725       GNUNET_assert (NULL != pg->peers[off].daemon);
6726       peer_shutdown_ctx = GNUNET_malloc (sizeof (struct PeerShutdownContext));
6727       peer_shutdown_ctx->daemon = pg->peers[off].daemon;
6728       peer_shutdown_ctx->shutdown_ctx = shutdown_ctx;
6729       GNUNET_SCHEDULER_add_now (&schedule_shutdown_task, peer_shutdown_ctx);
6730
6731       if (NULL != pg->peers[off].cfg)
6732       {
6733         GNUNET_CONFIGURATION_destroy (pg->peers[off].cfg);
6734         pg->peers[off].cfg = NULL;
6735       }
6736 #if OLD
6737       conn_iter = pg->peers[off].allowed_peers_head;
6738       while (conn_iter != NULL)
6739         {
6740           temp_conn = conn_iter->next;
6741           GNUNET_free(conn_iter);
6742           conn_iter = temp_conn;
6743         }
6744
6745       conn_iter = pg->peers[off].connect_peers_head;
6746       while (conn_iter != NULL)
6747         {
6748           temp_conn = conn_iter->next;
6749           GNUNET_free(conn_iter);
6750           conn_iter = temp_conn;
6751         }
6752
6753       conn_iter = pg->peers[off].blacklisted_peers_head;
6754       while (conn_iter != NULL)
6755         {
6756           temp_conn = conn_iter->next;
6757           GNUNET_free(conn_iter);
6758           conn_iter = temp_conn;
6759         }
6760
6761       conn_iter = pg->peers[off].connect_peers_working_set_head;
6762       while (conn_iter != NULL)
6763         {
6764           temp_conn = conn_iter->next;
6765           GNUNET_free(conn_iter);
6766           conn_iter = temp_conn;
6767         }
6768 #else
6769       if (pg->peers[off].allowed_peers != NULL)
6770         GNUNET_CONTAINER_multihashmap_destroy (pg->peers[off].allowed_peers);
6771       if (pg->peers[off].connect_peers != NULL)
6772         GNUNET_CONTAINER_multihashmap_destroy (pg->peers[off].connect_peers);
6773       if (pg->peers[off].blacklisted_peers != NULL)
6774         GNUNET_CONTAINER_multihashmap_destroy (pg->
6775                                                peers[off].blacklisted_peers);
6776 #endif
6777     }
6778 }
6779
6780 /* end of testing_group.c */