src/modules/m_spanningtree.cpp

   1 /*   +------------------------------------+
   2  *   | Inspire Internet Relay Chat Daemon |
   3  *   +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                     E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* $ModDesc: Povides a spanning tree server link protocol */
  18
  19 using namespace std;
  20
  21 #include "configreader.h"
  22 #include "users.h"
  23 #include "channels.h"
  24 #include "modules.h"
  25 #include "commands/cmd_whois.h"
  26 #include "commands/cmd_stats.h"
  27 #include "socket.h"
  28 #include "inspircd.h"
  29 #include "wildcard.h"
  30 #include "xline.h"
  31 #include "cull_list.h"
  32 #include "aes.h"
  33
  34 #define nspace __gnu_cxx
  35
  36
  37 /** If you make a change which breaks the protocol, increment this.
  38  * If you  completely change the protocol, completely change the number.
  39  */
  40 const long ProtocolVersion = 1101;
  41
  42 /*
  43  * The server list in InspIRCd is maintained as two structures
  44  * which hold the data in different ways. Most of the time, we
  45  * want to very quicky obtain three pieces of information:
  46  *
  47  * (1) The information on a server
  48  * (2) The information on the server we must send data through
  49  *     to actually REACH the server we're after
  50  * (3) Potentially, the child/parent objects of this server
  51  *
  52  * The InspIRCd spanning protocol provides easy access to these
  53  * by storing the data firstly in a recursive structure, where
  54  * each item references its parent item, and a dynamic list
  55  * of child items, and another structure which stores the items
  56  * hashed, linearly. This means that if we want to find a server
  57  * by name quickly, we can look it up in the hash, avoiding
  58  * any O(n) lookups. If however, during a split or sync, we want
  59  * to apply an operation to a server, and any of its child objects
  60  * we can resort to recursion to walk the tree structure.
  61  */
  62
  63 using irc::sockets::MatchCIDR;
  64
  65 class ModuleSpanningTree;
  66 static ModuleSpanningTree* TreeProtocolModule;
  67 static InspIRCd* ServerInstance;
  68
  69 /** Any socket can have one of five states at any one time.
  70  * The LISTENER state indicates a socket which is listening
  71  * for connections. It cannot receive data itself, only incoming
  72  * sockets.
  73  * The CONNECTING state indicates an outbound socket which is
  74  * waiting to be writeable.
  75  * The WAIT_AUTH_1 state indicates the socket is outbound and
  76  * has successfully connected, but has not yet sent and received
  77  * SERVER strings.
  78  * The WAIT_AUTH_2 state indicates that the socket is inbound
  79  * (allocated by a LISTENER) but has not yet sent and received
  80  * SERVER strings.
  81  * The CONNECTED state represents a fully authorized, fully
  82  * connected server.
  83  */
  84 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  85
  86 /* Foward declarations */
  87 class TreeServer;
  88 class TreeSocket;
  89
  90 /* This variable represents the root of the server tree
  91  * (for all intents and purposes, it's us)
  92  */
  93 TreeServer *TreeRoot;
  94
  95 /* This hash_map holds the hash equivalent of the server
  96  * tree, used for rapid linear lookups.
  97  */
  98 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
  99 server_hash serverlist;
 100
 101 typedef nspace::hash_map<std::string, userrec*> uid_hash;
 102 typedef nspace::hash_map<std::string, char*> sid_hash;
 103
 104 /* More forward declarations */
 105 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 106 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 107 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 108 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 109 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 110 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 111 void ReadConfiguration(bool rebind);
 112
 113 /* Flatten links and /MAP for non-opers */
 114 bool FlatLinks;
 115 /* Hide U-Lined servers in /MAP and /LINKS */
 116 bool HideULines;
 117
 118 std::vector<std::string> ValidIPs;
 119
 120 class UserManager : public classbase
 121 {
 122         uid_hash uids;
 123         sid_hash sids;
 124  public:
 125         UserManager()
 126         {
 127                 uids.clear();
 128                 sids.clear();
 129         }
 130
 131         std::string UserToUID(userrec* user)
 132         {
 133                 return "";
 134         }
 135
 136         std::string UIDToUser(const std::string &UID)
 137         {
 138                 return "";
 139         }
 140
 141         std::string CreateAndAdd(userrec* user)
 142         {
 143                 return "";
 144         }
 145
 146         std::string CreateAndAdd(const std::string &servername)
 147         {
 148                 return "";
 149         }
 150
 151         std::string ServerToSID(const std::string &servername)
 152         {
 153                 return "";
 154         }
 155
 156         std::string SIDToServer(const std::string &SID)
 157         {
 158                 return "";
 159         }
 160
 161         userrec* FindByID(const std::string &UID)
 162         {
 163                 return NULL;
 164         }
 165 };
 166
 167
 168 /** Each server in the tree is represented by one class of
 169  * type TreeServer. A locally connected TreeServer can
 170  * have a class of type TreeSocket associated with it, for
 171  * remote servers, the TreeSocket entry will be NULL.
 172  * Each server also maintains a pointer to its parent
 173  * (NULL if this server is ours, at the top of the tree)
 174  * and a pointer to its "Route" (see the comments in the
 175  * constructors below), and also a dynamic list of pointers
 176  * to its children which can be iterated recursively
 177  * if required. Creating or deleting objects of type
 178  i* TreeServer automatically maintains the hash_map of
 179  * TreeServer items, deleting and inserting them as they
 180  * are created and destroyed.
 181  */
 182 class TreeServer : public classbase
 183 {
 184         InspIRCd* ServerInstance;               /* Creator */
 185         TreeServer* Parent;                     /* Parent entry */
 186         TreeServer* Route;                      /* Route entry */
 187         std::vector<TreeServer*> Children;      /* List of child objects */
 188         irc::string ServerName;                 /* Server's name */
 189         std::string ServerDesc;                 /* Server's description */
 190         std::string VersionString;              /* Version string or empty string */
 191         int UserCount;                          /* Not used in this version */
 192         int OperCount;                          /* Not used in this version */
 193         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 194         time_t NextPing;                        /* After this time, the server should be PINGed*/
 195         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 196
 197  public:
 198
 199         /** We don't use this constructor. Its a dummy, and won't cause any insertion
 200          * of the TreeServer into the hash_map. See below for the two we DO use.
 201          */
 202         TreeServer(InspIRCd* Instance) : ServerInstance(Instance)
 203         {
 204                 Parent = NULL;
 205                 ServerName = "";
 206                 ServerDesc = "";
 207                 VersionString = "";
 208                 UserCount = OperCount = 0;
 209                 VersionString = ServerInstance->GetVersionString();
 210         }
 211
 212         /** We use this constructor only to create the 'root' item, TreeRoot, which
 213          * represents our own server. Therefore, it has no route, no parent, and
 214          * no socket associated with it. Its version string is our own local version.
 215          */
 216         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc)
 217         {
 218                 Parent = NULL;
 219                 VersionString = "";
 220                 UserCount = OperCount = 0;
 221                 VersionString = ServerInstance->GetVersionString();
 222                 Route = NULL;
 223                 Socket = NULL; /* Fix by brain */
 224                 AddHashEntry();
 225         }
 226
 227         /** When we create a new server, we call this constructor to initialize it.
 228          * This constructor initializes the server's Route and Parent, and sets up
 229          * its ping counters so that it will be pinged one minute from now.
 230          */
 231         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 232                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 233         {
 234                 VersionString = "";
 235                 UserCount = OperCount = 0;
 236                 this->SetNextPingTime(time(NULL) + 60);
 237                 this->SetPingFlag();
 238
 239                 /* find the 'route' for this server (e.g. the one directly connected
 240                  * to the local server, which we can use to reach it)
 241                  *
 242                  * In the following example, consider we have just added a TreeServer
 243                  * class for server G on our network, of which we are server A.
 244                  * To route traffic to G (marked with a *) we must send the data to
 245                  * B (marked with a +) so this algorithm initializes the 'Route'
 246                  * value to point at whichever server traffic must be routed through
 247                  * to get here. If we were to try this algorithm with server B,
 248                  * the Route pointer would point at its own object ('this').
 249                  *
 250                  *              A
 251                  *             / \
 252                  *          + B   C
 253                  *           / \   \
 254                  *          D   E   F
 255                  *         /         \
 256                  *      * G           H
 257                  *
 258                  * We only run this algorithm when a server is created, as
 259                  * the routes remain constant while ever the server exists, and
 260                  * do not need to be re-calculated.
 261                  */
 262
 263                 Route = Above;
 264                 if (Route == TreeRoot)
 265                 {
 266                         Route = this;
 267                 }
 268                 else
 269                 {
 270                         while (this->Route->GetParent() != TreeRoot)
 271                         {
 272                                 this->Route = Route->GetParent();
 273                         }
 274                 }
 275
 276                 /* Because recursive code is slow and takes a lot of resources,
 277                  * we store two representations of the server tree. The first
 278                  * is a recursive structure where each server references its
 279                  * children and its parent, which is used for netbursts and
 280                  * netsplits to dump the whole dataset to the other server,
 281                  * and the second is used for very fast lookups when routing
 282                  * messages and is instead a hash_map, where each item can
 283                  * be referenced by its server name. The AddHashEntry()
 284                  * call below automatically inserts each TreeServer class
 285                  * into the hash_map as it is created. There is a similar
 286                  * maintainance call in the destructor to tidy up deleted
 287                  * servers.
 288                  */
 289
 290                 this->AddHashEntry();
 291         }
 292
 293         int QuitUsers(const std::string &reason)
 294         {
 295                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 296                 const char* reason_s = reason.c_str();
 297                 std::vector<userrec*> time_to_die;
 298                 for (user_hash::iterator n = ServerInstance->clientlist.begin(); n != ServerInstance->clientlist.end(); n++)
 299                 {
 300                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 301                         {
 302                                 time_to_die.push_back(n->second);
 303                         }
 304                 }
 305                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 306                 {
 307                         userrec* a = (userrec*)*n;
 308                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 309                         if (!IS_LOCAL(a))
 310                                 userrec::QuitUser(ServerInstance,a,reason_s);
 311                 }
 312                 return time_to_die.size();
 313         }
 314
 315         /** This method is used to add the structure to the
 316          * hash_map for linear searches. It is only called
 317          * by the constructors.
 318          */
 319         void AddHashEntry()
 320         {
 321                 server_hash::iterator iter;
 322                 iter = serverlist.find(this->ServerName.c_str());
 323                 if (iter == serverlist.end())
 324                         serverlist[this->ServerName.c_str()] = this;
 325         }
 326
 327         /** This method removes the reference to this object
 328          * from the hash_map which is used for linear searches.
 329          * It is only called by the default destructor.
 330          */
 331         void DelHashEntry()
 332         {
 333                 server_hash::iterator iter;
 334                 iter = serverlist.find(this->ServerName.c_str());
 335                 if (iter != serverlist.end())
 336                         serverlist.erase(iter);
 337         }
 338
 339         /** These accessors etc should be pretty self-
 340          * explanitory.
 341          */
 342         TreeServer* GetRoute()
 343         {
 344                 return Route;
 345         }
 346
 347         std::string GetName()
 348         {
 349                 return ServerName.c_str();
 350         }
 351
 352         std::string GetDesc()
 353         {
 354                 return ServerDesc;
 355         }
 356
 357         std::string GetVersion()
 358         {
 359                 return VersionString;
 360         }
 361
 362         void SetNextPingTime(time_t t)
 363         {
 364                 this->NextPing = t;
 365                 LastPingWasGood = false;
 366         }
 367
 368         time_t NextPingTime()
 369         {
 370                 return NextPing;
 371         }
 372
 373         bool AnsweredLastPing()
 374         {
 375                 return LastPingWasGood;
 376         }
 377
 378         void SetPingFlag()
 379         {
 380                 LastPingWasGood = true;
 381         }
 382
 383         int GetUserCount()
 384         {
 385                 return UserCount;
 386         }
 387
 388         void AddUserCount()
 389         {
 390                 UserCount++;
 391         }
 392
 393         void DelUserCount()
 394         {
 395                 UserCount--;
 396         }
 397
 398         int GetOperCount()
 399         {
 400                 return OperCount;
 401         }
 402
 403         TreeSocket* GetSocket()
 404         {
 405                 return Socket;
 406         }
 407
 408         TreeServer* GetParent()
 409         {
 410                 return Parent;
 411         }
 412
 413         void SetVersion(std::string Version)
 414         {
 415                 VersionString = Version;
 416         }
 417
 418         unsigned int ChildCount()
 419         {
 420                 return Children.size();
 421         }
 422
 423         TreeServer* GetChild(unsigned int n)
 424         {
 425                 if (n < Children.size())
 426                 {
 427                         /* Make sure they  cant request
 428                          * an out-of-range object. After
 429                          * all we know what these programmer
 430                          * types are like *grin*.
 431                          */
 432                         return Children[n];
 433                 }
 434                 else
 435                 {
 436                         return NULL;
 437                 }
 438         }
 439
 440         void AddChild(TreeServer* Child)
 441         {
 442                 Children.push_back(Child);
 443         }
 444
 445         bool DelChild(TreeServer* Child)
 446         {
 447                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 448                 {
 449                         if (*a == Child)
 450                         {
 451                                 Children.erase(a);
 452                                 return true;
 453                         }
 454                 }
 455                 return false;
 456         }
 457
 458         /** Removes child nodes of this node, and of that node, etc etc.
 459          * This is used during netsplits to automatically tidy up the
 460          * server tree. It is slow, we don't use it for much else.
 461          */
 462         bool Tidy()
 463         {
 464                 bool stillchildren = true;
 465                 while (stillchildren)
 466                 {
 467                         stillchildren = false;
 468                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 469                         {
 470                                 TreeServer* s = (TreeServer*)*a;
 471                                 s->Tidy();
 472                                 Children.erase(a);
 473                                 DELETE(s);
 474                                 stillchildren = true;
 475                                 break;
 476                         }
 477                 }
 478                 return true;
 479         }
 480
 481         ~TreeServer()
 482         {
 483                 /* We'd better tidy up after ourselves, eh? */
 484                 this->DelHashEntry();
 485         }
 486 };
 487
 488 /** The Link class might as well be a struct,
 489  * but this is C++ and we don't believe in structs (!).
 490  * It holds the entire information of one <link>
 491  * tag from the main config file. We maintain a list
 492  * of them, and populate the list on rehash/load.
 493  */
 494 class Link : public classbase
 495 {
 496  public:
 497         irc::string Name;
 498         std::string IPAddr;
 499         int Port;
 500         std::string SendPass;
 501         std::string RecvPass;
 502         unsigned long AutoConnect;
 503         time_t NextConnectTime;
 504         std::string EncryptionKey;
 505         bool HiddenFromStats;
 506         irc::string FailOver;
 507 };
 508
 509 void DoFailOver(Link* x);
 510 Link* FindLink(const std::string& name);
 511
 512 /* The usual stuff for inspircd modules,
 513  * plus the vector of Link classes which we
 514  * use to store the <link> tags from the config
 515  * file.
 516  */
 517 ConfigReader *Conf;
 518 std::vector<Link> LinkBlocks;
 519
 520 /** Yay for fast searches!
 521  * This is hundreds of times faster than recursion
 522  * or even scanning a linked list, especially when
 523  * there are more than a few servers to deal with.
 524  * (read as: lots).
 525  */
 526 TreeServer* FindServer(std::string ServerName)
 527 {
 528         server_hash::iterator iter;
 529         iter = serverlist.find(ServerName.c_str());
 530         if (iter != serverlist.end())
 531         {
 532                 return iter->second;
 533         }
 534         else
 535         {
 536                 return NULL;
 537         }
 538 }
 539
 540 /** Returns the locally connected server we must route a
 541  * message through to reach server 'ServerName'. This
 542  * only applies to one-to-one and not one-to-many routing.
 543  * See the comments for the constructor of TreeServer
 544  * for more details.
 545  */
 546 TreeServer* BestRouteTo(std::string ServerName)
 547 {
 548         if (ServerName.c_str() == TreeRoot->GetName())
 549                 return NULL;
 550         TreeServer* Found = FindServer(ServerName);
 551         if (Found)
 552         {
 553                 return Found->GetRoute();
 554         }
 555         else
 556         {
 557                 return NULL;
 558         }
 559 }
 560
 561 /** Find the first server matching a given glob mask.
 562  * Theres no find-using-glob method of hash_map [awwww :-(]
 563  * so instead, we iterate over the list using an iterator
 564  * and match each one until we get a hit. Yes its slow,
 565  * deal with it.
 566  */
 567 TreeServer* FindServerMask(std::string ServerName)
 568 {
 569         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 570         {
 571                 if (match(i->first.c_str(),ServerName.c_str()))
 572                         return i->second;
 573         }
 574         return NULL;
 575 }
 576
 577 /* A convenient wrapper that returns true if a server exists */
 578 bool IsServer(std::string ServerName)
 579 {
 580         return (FindServer(ServerName) != NULL);
 581 }
 582
 583
 584 class cmd_rconnect : public command_t
 585 {
 586         Module* Creator;
 587  public:
 588         cmd_rconnect (InspIRCd* Instance, Module* Callback) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback)
 589         {
 590                 this->source = "m_spanningtree.so";
 591                 syntax = "<remote-server-mask> <servermask>";
 592         }
 593
 594         CmdResult Handle (const char** parameters, int pcnt, userrec *user)
 595         {
 596                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 597                 /* Is this aimed at our server? */
 598                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 599                 {
 600                         /* Yes, initiate the given connect */
 601                         ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 602                         const char* para[1];
 603                         para[0] = parameters[1];
 604                         std::string original_command = std::string("CONNECT ") + parameters[1];
 605                         Creator->OnPreCommand("CONNECT", para, 1, user, true, original_command);
 606
 607                         return CMD_SUCCESS;
 608                 }
 609
 610                 return CMD_FAILURE;
 611         }
 612 };
 613
 614
 615
 616 /** Every SERVER connection inbound or outbound is represented by
 617  * an object of type TreeSocket.
 618  * TreeSockets, being inherited from InspSocket, can be tied into
 619  * the core socket engine, and we cn therefore receive activity events
 620  * for them, just like activex objects on speed. (yes really, that
 621  * is a technical term!) Each of these which relates to a locally
 622  * connected server is assocated with it, by hooking it onto a
 623  * TreeSocket class using its constructor. In this way, we can
 624  * maintain a list of servers, some of which are directly connected,
 625  * some of which are not.
 626  */
 627 class TreeSocket : public InspSocket
 628 {
 629         std::string myhost;
 630         std::string in_buffer;
 631         ServerState LinkState;
 632         std::string InboundServerName;
 633         std::string InboundDescription;
 634         int num_lost_users;
 635         int num_lost_servers;
 636         time_t NextPing;
 637         bool LastPingWasGood;
 638         bool bursting;
 639         AES* ctx_in;
 640         AES* ctx_out;
 641         unsigned int keylength;
 642         std::string ModuleList;
 643         std::map<std::string,std::string> CapKeys;
 644
 645  public:
 646
 647         /** Because most of the I/O gubbins are encapsulated within
 648          * InspSocket, we just call the superclass constructor for
 649          * most of the action, and append a few of our own values
 650          * to it.
 651          */
 652         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime)
 653                 : InspSocket(SI, host, port, listening, maxtime)
 654         {
 655                 myhost = host;
 656                 this->LinkState = LISTENER;
 657                 this->ctx_in = NULL;
 658                 this->ctx_out = NULL;
 659         }
 660
 661         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 662                 : InspSocket(SI, host, port, listening, maxtime)
 663         {
 664                 myhost = ServerName;
 665                 this->LinkState = CONNECTING;
 666                 this->ctx_in = NULL;
 667                 this->ctx_out = NULL;
 668         }
 669
 670         /** When a listening socket gives us a new file descriptor,
 671          * we must associate it with a socket without creating a new
 672          * connection. This constructor is used for this purpose.
 673          */
 674         TreeSocket(InspIRCd* SI, int newfd, char* ip)
 675                 : InspSocket(SI, newfd, ip)
 676         {
 677                 this->LinkState = WAIT_AUTH_1;
 678                 this->ctx_in = NULL;
 679                 this->ctx_out = NULL;
 680                 this->SendCapabilities();
 681         }
 682
 683         ~TreeSocket()
 684         {
 685                 if (ctx_in)
 686                         DELETE(ctx_in);
 687                 if (ctx_out)
 688                         DELETE(ctx_out);
 689         }
 690
 691         void InitAES(std::string key,std::string SName)
 692         {
 693                 if (key == "")
 694                         return;
 695
 696                 ctx_in = new AES();
 697                 ctx_out = new AES();
 698                 Instance->Log(DEBUG,"Initialized AES key %s",key.c_str());
 699                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 700                 keylength = key.length();
 701                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 702                 {
 703                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 704                         Instance->Log(DEBUG,"Key length not 16, 24 or 32 characters!");
 705                 }
 706                 else
 707                 {
 708                         this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 709                         ctx_in->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 710                                 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 711                         ctx_out->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 712                                 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 713                 }
 714         }
 715
 716         /** When an outbound connection finishes connecting, we receive
 717          * this event, and must send our SERVER string to the other
 718          * side. If the other side is happy, as outlined in the server
 719          * to server docs on the inspircd.org site, the other side
 720          * will then send back its own server string.
 721          */
 722         virtual bool OnConnected()
 723         {
 724                 if (this->LinkState == CONNECTING)
 725                 {
 726                         /* we do not need to change state here. */
 727                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 728                         {
 729                                 if (x->Name == this->myhost)
 730                                 {
 731                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
 732                                         this->SendCapabilities();
 733                                         if (x->EncryptionKey != "")
 734                                         {
 735                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 736                                                 {
 737                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 738                                                 }
 739                                                 else
 740                                                 {
 741                                                         this->WriteLine(std::string("AES ")+this->Instance->Config->ServerName);
 742                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 743                                                 }
 744                                         }
 745                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 746                                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 747                                         return true;
 748                                 }
 749                         }
 750                 }
 751                 /* There is a (remote) chance that between the /CONNECT and the connection
 752                  * being accepted, some muppet has removed the <link> block and rehashed.
 753                  * If that happens the connection hangs here until it's closed. Unlikely
 754                  * and rather harmless.
 755                  */
 756                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 757                 return true;
 758         }
 759
 760         virtual void OnError(InspSocketError e)
 761         {
 762                 /* We don't handle this method, because all our
 763                  * dirty work is done in OnClose() (see below)
 764                  * which is still called on error conditions too.
 765                  */
 766                 if (e == I_ERR_CONNECT)
 767                 {
 768                         this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
 769                         Link* MyLink = FindLink(myhost);
 770                         if (MyLink)
 771                                 DoFailOver(MyLink);
 772                 }
 773         }
 774
 775         virtual int OnDisconnect()
 776         {
 777                 /* For the same reason as above, we don't
 778                  * handle OnDisconnect()
 779                  */
 780                 return true;
 781         }
 782
 783         /** Recursively send the server tree with distances as hops.
 784          * This is used during network burst to inform the other server
 785          * (and any of ITS servers too) of what servers we know about.
 786          * If at any point any of these servers already exist on the other
 787          * end, our connection may be terminated. The hopcounts given
 788          * by this function are relative, this doesn't matter so long as
 789          * they are all >1, as all the remote servers re-calculate them
 790          * to be relative too, with themselves as hop 0.
 791          */
 792         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 793         {
 794                 char command[1024];
 795                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 796                 {
 797                         TreeServer* recursive_server = Current->GetChild(q);
 798                         if (recursive_server != s)
 799                         {
 800                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 801                                 this->WriteLine(command);
 802                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 803                                 /* down to next level */
 804                                 this->SendServers(recursive_server, s, hops+1);
 805                         }
 806                 }
 807         }
 808
 809         std::string MyCapabilities()
 810         {
 811                 std::vector<std::string> modlist;
 812                 std::string capabilities = "";
 813
 814                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 815                 {
 816                         if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
 817                                 modlist.push_back(this->Instance->Config->module_names[i]);
 818                 }
 819                 sort(modlist.begin(),modlist.end());
 820                 for (unsigned int i = 0; i < modlist.size(); i++)
 821                 {
 822                         if (i)
 823                                 capabilities = capabilities + ",";
 824                         capabilities = capabilities + modlist[i];
 825                 }
 826                 return capabilities;
 827         }
 828
 829         void SendCapabilities()
 830         {
 831                 irc::commasepstream modulelist(MyCapabilities());
 832
 833                 this->WriteLine("CAPAB START");
 834
 835                 /* Send module names, split at 509 length */
 836                 std::string item = "*";
 837                 std::string line = "CAPAB MODULES ";
 838                 while ((item = modulelist.GetToken()) != "")
 839                 {
 840                         if (line.length() + item.length() + 1 > 509)
 841                         {
 842                                 this->WriteLine(line);
 843                                 line = "CAPAB MODULES ";
 844                         }
 845
 846                         if (line != "CAPAB MODULES ")
 847                                 line.append(",");
 848
 849                         line.append(item);
 850                 }
 851                 if (line != "CAPAB MODULES ")
 852                         this->WriteLine(line);
 853
 854                 int ip6 = 0;
 855                 int ip6support = 0;
 856 #ifdef IPV6
 857                 ip6 = 1;
 858 #endif
 859 #ifdef SUPPORT_IP6LINKS
 860                 ip6support = 1;
 861 #endif
 862                 this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support)+" PROTOCOL="+ConvToStr(ProtocolVersion));
 863
 864                 this->WriteLine("CAPAB END");
 865         }
 866
 867         /* Check a comma seperated list for an item */
 868         bool HasItem(const std::string &list, const std::string &item)
 869         {
 870                 irc::commasepstream seplist(list);
 871
 872                 std::string item2 = "*";
 873                 while ((item2 = seplist.GetToken()) != "")
 874                 {
 875                         if (item2 == item)
 876                                 return true;
 877                 }
 878
 879                 return false;
 880         }
 881
 882         /* Isolate and return the elements that are different between two comma seperated lists */
 883         std::string ListDifference(const std::string &one, const std::string &two)
 884         {
 885                 irc::commasepstream list_one(one);
 886                 std::string item = "*";
 887                 std::string result = "";
 888                 while ((item = list_one.GetToken()) != "")
 889                 {
 890                         if (!HasItem(two, item))
 891                         {
 892                                 result.append(" ");
 893                                 result.append(item);
 894                         }
 895                 }
 896                 return result;
 897         }
 898
 899         bool Capab(std::deque<std::string> params)
 900         {
 901                 if (params.size() < 1)
 902                 {
 903                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 904                         return false;
 905                 }
 906
 907                 if (params[0] == "START")
 908                 {
 909                         this->ModuleList = "";
 910                         this->CapKeys.clear();
 911                 }
 912                 else if (params[0] == "END")
 913                 {
 914                         std::string reason = "";
 915                         int ip6support = 0;
 916 #ifdef SUPPORT_IP6LINKS
 917                         ip6support = 1;
 918 #endif
 919                         /* Compare ModuleList and check CapKeys...
 920                          * Maybe this could be tidier? -- Brain
 921                          */
 922                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 923                         {
 924                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 925                                 if (!diff.length())
 926                                 {
 927                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 928                                 }
 929                                 else
 930                                 {
 931                                         diff = "this server:" + diff;
 932                                 }
 933                                 if (diff.length() == 12)
 934                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 935                                 else
 936                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 937                         }
 938
 939                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 940                                 reason = "We don't both support linking to IPV6 servers";
 941
 942                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 943                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 944
 945                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 946                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 947
 948                         if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
 949                         {
 950                                 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
 951                                 {
 952                                         reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
 953                                 }
 954                                 else
 955                                 {
 956                                         reason = "Protocol version not specified";
 957                                 }
 958                         }
 959
 960                         if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
 961                                 reason = "We don't both have halfop support enabled/disabled identically";
 962
 963                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 964                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 965
 966                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 967                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 968
 969                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 970                                 reason = "Maximum modes per line differ or remote modes per line not specified";
 971
 972                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 973                                 reason = "Maximum quit lengths differ or remote quit length not specified";
 974
 975                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 976                                 reason = "Maximum topic lengths differ or remote topic length not specified";
 977
 978                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
 979                                 reason = "Maximum kick lengths differ or remote kick length not specified";
 980
 981                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
 982                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
 983
 984                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
 985                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
 986
 987                         if (reason.length())
 988                         {
 989                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
 990                                 return false;
 991                         }
 992                 }
 993                 else if ((params[0] == "MODULES") && (params.size() == 2))
 994                 {
 995                         if (!this->ModuleList.length())
 996                         {
 997                                 this->ModuleList.append(params[1]);
 998                         }
 999                         else
1000                         {
1001                                 this->ModuleList.append(",");
1002                                 this->ModuleList.append(params[1]);
1003                         }
1004                 }
1005                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
1006                 {
1007                         irc::tokenstream capabs(params[1]);
1008                         std::string item = "*";
1009                         while ((item = capabs.GetToken()) != "")
1010                         {
1011                                 /* Process each key/value pair */
1012                                 std::string::size_type equals = item.rfind('=');
1013                                 if (equals != std::string::npos)
1014                                 {
1015                                         std::string var = item.substr(0, equals);
1016                                         std::string value = item.substr(equals+1, item.length());
1017                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1018                                         CapKeys[var] = value;
1019                                 }
1020                         }
1021                 }
1022
1023                 return true;
1024         }
1025
1026         /** This function forces this server to quit, removing this server
1027          * and any users on it (and servers and users below that, etc etc).
1028          * It's very slow and pretty clunky, but luckily unless your network
1029          * is having a REAL bad hair day, this function shouldnt be called
1030          * too many times a month ;-)
1031          */
1032         void SquitServer(std::string &from, TreeServer* Current)
1033         {
1034                 /* recursively squit the servers attached to 'Current'.
1035                  * We're going backwards so we don't remove users
1036                  * while we still need them ;)
1037                  */
1038                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1039                 {
1040                         TreeServer* recursive_server = Current->GetChild(q);
1041                         this->SquitServer(from,recursive_server);
1042                 }
1043                 /* Now we've whacked the kids, whack self */
1044                 num_lost_servers++;
1045                 num_lost_users += Current->QuitUsers(from);
1046         }
1047
1048         /** This is a wrapper function for SquitServer above, which
1049          * does some validation first and passes on the SQUIT to all
1050          * other remaining servers.
1051          */
1052         void Squit(TreeServer* Current,std::string reason)
1053         {
1054                 if ((Current) && (Current != TreeRoot))
1055                 {
1056                         std::deque<std::string> params;
1057                         params.push_back(Current->GetName());
1058                         params.push_back(":"+reason);
1059                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1060                         if (Current->GetParent() == TreeRoot)
1061                         {
1062                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1063                         }
1064                         else
1065                         {
1066                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1067                         }
1068                         num_lost_servers = 0;
1069                         num_lost_users = 0;
1070                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1071                         SquitServer(from, Current);
1072                         Current->Tidy();
1073                         Current->GetParent()->DelChild(Current);
1074                         DELETE(Current);
1075                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1076                 }
1077                 else
1078                 {
1079                         Instance->Log(DEFAULT,"Squit from unknown server");
1080                 }
1081         }
1082
1083         /** FMODE command - server mode with timestamp checks */
1084         bool ForceMode(std::string source, std::deque<std::string> &params)
1085         {
1086                 /* Chances are this is a 1.0 FMODE without TS */
1087                 if (params.size() < 3)
1088                 {
1089                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
1090                         return false;
1091                 }
1092
1093                 bool smode = false;
1094                 std::string sourceserv;
1095
1096                 /* Are we dealing with an FMODE from a user, or from a server? */
1097                 userrec* who = this->Instance->FindNick(source);
1098                 if (who)
1099                 {
1100                         /* FMODE from a user, set sourceserv to the users server name */
1101                         sourceserv = who->server;
1102                 }
1103                 else
1104                 {
1105                         /* FMODE from a server, create a fake user to receive mode feedback */
1106                         who = new userrec(this->Instance);
1107                         who->SetFd(FD_MAGIC_NUMBER);
1108                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1109                         sourceserv = source;    /* Set sourceserv to the actual source string */
1110                 }
1111                 const char* modelist[64];
1112                 time_t TS = 0;
1113                 int n = 0;
1114                 memset(&modelist,0,sizeof(modelist));
1115                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1116                 {
1117                         if (q == 1)
1118                         {
1119                                 /* The timestamp is in this position.
1120                                  * We don't want to pass that up to the
1121                                  * server->client protocol!
1122                                  */
1123                                 TS = atoi(params[q].c_str());
1124                         }
1125                         else
1126                         {
1127                                 /* Everything else is fine to append to the modelist */
1128                                 modelist[n++] = params[q].c_str();
1129                         }
1130
1131                 }
1132                 /* Extract the TS value of the object, either userrec or chanrec */
1133                 userrec* dst = this->Instance->FindNick(params[0]);
1134                 chanrec* chan = NULL;
1135                 time_t ourTS = 0;
1136                 if (dst)
1137                 {
1138                         ourTS = dst->age;
1139                 }
1140                 else
1141                 {
1142                         chan = this->Instance->FindChan(params[0]);
1143                         if (chan)
1144                         {
1145                                 ourTS = chan->age;
1146                         }
1147                 }
1148
1149                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1150                  * with parameters.
1151                  */
1152                 if (TS == ourTS)
1153                 {
1154                         Instance->Log(DEBUG,"Entering TS equality check");
1155                         ModeHandler* mh = NULL;
1156                         unsigned long paramptr = 3;
1157                         std::string to_bounce = "";
1158                         std::string to_keep = "";
1159                         std::vector<std::string> params_to_keep;
1160                         std::string params_to_bounce = "";
1161                         bool adding = true;
1162                         char cur_change = 1;
1163                         char old_change = 0;
1164                         char old_bounce_change = 0;
1165                         /* Merge modes, basically do special stuff to mode with params */
1166                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1167                         {
1168                                 switch (*x)
1169                                 {
1170                                         case '-':
1171                                                 adding = false;
1172                                         break;
1173                                         case '+':
1174                                                 adding = true;
1175                                         break;
1176                                         default:
1177                                                 if (adding)
1178                                                 {
1179                                                         /* We only care about whats being set,
1180                                                          * not whats being unset
1181                                                          */
1182                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1183
1184                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1185                                                         {
1186                                                                 /* We only want to do special things to
1187                                                                  * modes with parameters, we are going to rewrite
1188                                                                  * those parameters
1189                                                                  */
1190                                                                 ModePair ret;
1191                                                                 adding ? cur_change = '+' : cur_change = '-';
1192
1193                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1194
1195                                                                 /* The mode is set here, check which we should keep */
1196                                                                 if (ret.first)
1197                                                                 {
1198                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1199
1200                                                                         if (which_to_keep == true)
1201                                                                         {
1202                                                                                 /* Keep ours, bounce theirs:
1203                                                                                  * Send back ours to them and
1204                                                                                  * drop their mode changs
1205                                                                                  */
1206                                                                                 adding ? cur_change = '+' : cur_change = '-';
1207                                                                                 if (cur_change != old_bounce_change)
1208                                                                                         to_bounce += cur_change;
1209                                                                                 to_bounce += *x;
1210                                                                                 old_bounce_change = cur_change;
1211
1212                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1213                                                                                         params_to_bounce.append(" ").append(ret.second);
1214                                                                         }
1215                                                                         else
1216                                                                         {
1217                                                                                 /* Keep theirs: Accept their mode change,
1218                                                                                  * do nothing else
1219                                                                                  */
1220                                                                                 adding ? cur_change = '+' : cur_change = '-';
1221                                                                                 if (cur_change != old_change)
1222                                                                                         to_keep += cur_change;
1223                                                                                 to_keep += *x;
1224                                                                                 old_change = cur_change;
1225
1226                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1227                                                                                         params_to_keep.push_back(params[paramptr]);
1228                                                                         }
1229                                                                 }
1230                                                                 else
1231                                                                 {
1232                                                                         /* Mode isnt set here, we want it */
1233                                                                         adding ? cur_change = '+' : cur_change = '-';
1234                                                                         if (cur_change != old_change)
1235                                                                                 to_keep += cur_change;
1236                                                                         to_keep += *x;
1237                                                                         old_change = cur_change;
1238
1239                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1240                                                                                 params_to_keep.push_back(params[paramptr]);
1241                                                                 }
1242
1243                                                                 paramptr++;
1244                                                         }
1245                                                         else
1246                                                         {
1247                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1248
1249                                                                 if (mh)
1250                                                                 {
1251                                                                         adding ? cur_change = '+' : cur_change = '-';
1252
1253                                                                         /* Just keep this, safe to merge with no checks
1254                                                                          * it has no parameters
1255                                                                          */
1256
1257                                                                         if (cur_change != old_change)
1258                                                                                 to_keep += cur_change;
1259                                                                         to_keep += *x;
1260                                                                         old_change = cur_change;
1261
1262                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1263                                                                         {
1264                                                                                 Instance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1265                                                                                 params_to_keep.push_back(params[paramptr++]);
1266                                                                         }
1267                                                                 }
1268                                                         }
1269                                                 }
1270                                                 else
1271                                                 {
1272                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1273
1274                                                         if (mh)
1275                                                         {
1276                                                                 /* Taking a mode away */
1277                                                                 adding ? cur_change = '+' : cur_change = '-';
1278
1279                                                                 if (cur_change != old_change)
1280                                                                         to_keep += cur_change;
1281                                                                 to_keep += *x;
1282                                                                 old_change = cur_change;
1283
1284                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1285                                                                         params_to_keep.push_back(params[paramptr++]);
1286                                                         }
1287                                                 }
1288                                         break;
1289                                 }
1290                         }
1291
1292                         if (to_bounce.length())
1293                         {
1294                                 std::deque<std::string> newparams;
1295                                 newparams.push_back(params[0]);
1296                                 newparams.push_back(ConvToStr(ourTS));
1297                                 newparams.push_back(to_bounce+params_to_bounce);
1298                                 Instance->Log(DEBUG,"BOUNCE BACK: %s",(to_bounce+params_to_bounce).c_str());
1299                                 DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1300                         }
1301
1302                         if (to_keep.length())
1303                         {
1304                                 unsigned int n = 2;
1305                                 unsigned int q = 0;
1306                                 modelist[0] = params[0].c_str();
1307                                 modelist[1] = to_keep.c_str();
1308
1309                                 if (params_to_keep.size() > 1)
1310                                 {
1311                                         for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
1312                                         {
1313                                                 Instance->Log(DEBUG,"KEEP Item %d of %d: %s", q, params_to_keep.size(), params_to_keep[q].c_str());
1314                                                 modelist[n++] = params_to_keep[q].c_str();
1315                                         }
1316                                 }
1317
1318                                 if (smode)
1319                                 {
1320                                         Instance->Log(DEBUG,"Send mode");
1321                                         this->Instance->SendMode(modelist, n+2, who);
1322                                 }
1323                                 else
1324                                 {
1325                                         Instance->Log(DEBUG,"Send mode client");
1326                                         this->Instance->CallCommandHandler("MODE", modelist, n+2, who);
1327                                 }
1328
1329                                 /* HOT POTATO! PASS IT ON! */
1330                                 DoOneToAllButSender(source,"FMODE",params,sourceserv);
1331                         }
1332                 }
1333                 else
1334                 /* U-lined servers always win regardless of their TS */
1335                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1336                 {
1337                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1338                          * SHOULD accept it, if its clock is right.
1339                          *
1340                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1341                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1342                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1343                          *
1344                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1345                          * writing the code. It took me a while to come up with this solution.
1346                          *
1347                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1348                          */
1349
1350                         std::deque<std::string> newparams;      /* New parameter list we send back */
1351                         newparams.push_back(params[0]);         /* Target, user or channel */
1352                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1353                         newparams.push_back("");                /* This contains the mode string. For now
1354                                                                  * it's empty, we fill it below.
1355                                                                  */
1356
1357                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1358                          * set to avoid a desync here.
1359                          */
1360                         std::string modebounce = "";
1361                         bool adding = true;
1362                         unsigned int t = 3;
1363                         ModeHandler* mh = NULL;
1364                         char cur_change = 1;
1365                         char old_change = 0;
1366                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1367                         {
1368                                 /* Iterate over all mode chars in the sent set */
1369                                 switch (*x)
1370                                 {
1371                                         /* Adding or subtracting modes? */
1372                                         case '-':
1373                                                 adding = false;
1374                                         break;
1375                                         case '+':
1376                                                 adding = true;
1377                                         break;
1378                                         default:
1379                                                 /* Find the mode handler for this mode */
1380                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1381
1382                                                 /* Got a mode handler?
1383                                                  * This also prevents us bouncing modes we have no handler for.
1384                                                  */
1385                                                 if (mh)
1386                                                 {
1387                                                         ModePair ret;
1388                                                         std::string p = "";
1389
1390                                                         /* Does the mode require a parameter right now?
1391                                                          * If it does, fetch it if we can
1392                                                          */
1393                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1394                                                                 p = params[t++];
1395
1396                                                         /* Call the ModeSet method to determine if its set with the
1397                                                          * given parameter here or not.
1398                                                          */
1399                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1400
1401                                                         /* XXX: Really. Dont ask.
1402                                                          * Determine from if its set combined with what the current
1403                                                          * 'state' is (adding or not) as to wether we should 'invert'
1404                                                          * or 'reinforce' the mode change
1405                                                          */
1406                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1407
1408                                                         /* Quickly determine if we have 'flipped' from + to -,
1409                                                          * or - to +, to prevent unneccessary +/- chars in the
1410                                                          * output string that waste bandwidth
1411                                                          */
1412                                                         if (cur_change != old_change)
1413                                                                 modebounce += cur_change;
1414                                                         old_change = cur_change;
1415
1416                                                         /* Add the mode character to the output string */
1417                                                         modebounce += mh->GetModeChar();
1418
1419                                                         /* We got a parameter back from ModeHandler::ModeSet,
1420                                                          * are we supposed to be sending one out right now?
1421                                                          */
1422                                                         if (ret.second.length())
1423                                                         {
1424                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1425                                                                         /* Yes we're supposed to be sending out
1426                                                                          * the parameter. Make sure it goes
1427                                                                          */
1428                                                                         newparams.push_back(ret.second);
1429                                                         }
1430
1431                                                 }
1432                                         break;
1433                                 }
1434                         }
1435
1436                         /* Update the parameters for FMODE with the new 'bounced' string */
1437                         newparams[2] = modebounce;
1438                         /* Only send it back the way it came, no need to send it anywhere else */
1439                         DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1440                         Instance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1441                 }
1442                 else
1443                 {
1444                         Instance->Log(DEBUG,"Allow modes, TS lower for sender");
1445                         /* The server was ulined, but something iffy is up with the TS.
1446                          * Sound the alarm bells!
1447                          */
1448                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1449                         {
1450                                 this->Instance->WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",sourceserv.c_str(),params[0].c_str());
1451                         }
1452                         /* Allow the mode, route it to either server or user command handling */
1453                         if (smode)
1454                                 this->Instance->SendMode(modelist,n,who);
1455                         else
1456                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1457
1458                         /* HOT POTATO! PASS IT ON! */
1459                         DoOneToAllButSender(source,"FMODE",params,sourceserv);
1460                 }
1461                 /* Are we supposed to free the userrec? */
1462                 if (smode)
1463                         DELETE(who);
1464
1465                 return true;
1466         }
1467
1468         /** FTOPIC command */
1469         bool ForceTopic(std::string source, std::deque<std::string> &params)
1470         {
1471                 if (params.size() != 4)
1472                         return true;
1473                 time_t ts = atoi(params[1].c_str());
1474                 std::string nsource = source;
1475
1476                 chanrec* c = this->Instance->FindChan(params[0]);
1477                 if (c)
1478                 {
1479                         if ((ts >= c->topicset) || (!*c->topic))
1480                         {
1481                                 std::string oldtopic = c->topic;
1482                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1483                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1484                                 c->topicset = ts;
1485                                 /* if the topic text is the same as the current topic,
1486                                  * dont bother to send the TOPIC command out, just silently
1487                                  * update the set time and set nick.
1488                                  */
1489                                 if (oldtopic != params[3])
1490                                 {
1491                                         userrec* user = this->Instance->FindNick(source);
1492                                         if (!user)
1493                                         {
1494                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1495                                         }
1496                                         else
1497                                         {
1498                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1499                                                 nsource = user->server;
1500                                         }
1501                                         /* all done, send it on its way */
1502                                         params[3] = ":" + params[3];
1503                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
1504                                 }
1505                         }
1506
1507                 }
1508
1509                 return true;
1510         }
1511
1512         /** FJOIN, similar to unreal SJOIN */
1513         bool ForceJoin(std::string source, std::deque<std::string> &params)
1514         {
1515                 if (params.size() < 3)
1516                         return true;
1517
1518                 char first[MAXBUF];
1519                 char modestring[MAXBUF];
1520                 char* mode_users[127];
1521                 memset(&mode_users,0,sizeof(mode_users));
1522                 mode_users[0] = first;
1523                 mode_users[1] = modestring;
1524                 strcpy(modestring,"+");
1525                 unsigned int modectr = 2;
1526
1527                 userrec* who = NULL;
1528                 std::string channel = params[0];
1529                 time_t TS = atoi(params[1].c_str());
1530                 char* key = "";
1531
1532                 chanrec* chan = this->Instance->FindChan(channel);
1533                 if (chan)
1534                 {
1535                         key = chan->key;
1536                 }
1537                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1538
1539                 /* default is a high value, which if we dont have this
1540                  * channel will let the other side apply their modes.
1541                  */
1542                 time_t ourTS = time(NULL)+600;
1543                 chanrec* us = this->Instance->FindChan(channel);
1544                 if (us)
1545                 {
1546                         ourTS = us->age;
1547                 }
1548
1549                 /* XXX: PAY ATTENTION:
1550                  * In 1.1, if they have the newer channel, we immediately clear
1551                  * all status modes from our users. We then accept their modes.
1552                  * If WE have the newer channel its the other side's job to do this.
1553                  * Note that this causes the losing server to send out confirming
1554                  * FMODE lines.
1555                  */
1556                 if ((ourTS > TS) || (this->Instance->ULine(source.c_str())))
1557                 {
1558                         Instance->Log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
1559                         std::deque<std::string> param_list;
1560                         us->age = TS;
1561                         ourTS = TS;
1562                         param_list.push_back(chan->name);
1563                         Instance->Log(DEBUG,"REMOVE ALL STATUS MODES FROM OUR USERS *NOW*");
1564                         this->RemoveStatus(Instance->Config->ServerName, param_list);
1565                 }
1566
1567                 irc::tokenstream users(params[2]);
1568                 std::string item = "*";
1569
1570                 /* do this first, so our mode reversals are correctly received by other servers
1571                  * if there is a TS collision.
1572                  */
1573                 params[2] = ":" + params[2];
1574                 DoOneToAllButSender(source,"FJOIN",params,source);
1575                 while (item != "")
1576                 {
1577                         item = users.GetToken();
1578                         /* process one user at a time, applying modes. */
1579                         char* usr = (char*)item.c_str();
1580                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1581                          * (is this even possible?) */
1582                         if (usr && *usr)
1583                         {
1584                                 char* permissions = usr;
1585                                 int ntimes = 0;
1586                                 while ((*permissions) && (*permissions != ','))
1587                                 {
1588                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1589                                         if (mh)
1590                                         {
1591                                                 ntimes++;
1592                                                 charlcat(modestring,mh->GetModeChar(),MAXBUF);
1593                                         }
1594                                         else
1595                                         {
1596                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",mh->GetPrefix());
1597                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+mh->GetModeChar()+"' in FJOIN");
1598                                                 return false;
1599                                         }
1600                                         usr++;
1601                                         permissions++;
1602                                 }
1603                                 usr++;
1604
1605                                 /* Did they get any modes? How many times? */
1606                                 for (int k = 0; k < ntimes; k++)
1607                                         mode_users[modectr++] = strdup(usr);
1608
1609                                 who = this->Instance->FindNick(usr);
1610                                 if (who)
1611                                 {
1612                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, key);
1613                                         if (modectr >= (MAXMODES-1))
1614                                         {
1615                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1616                                                  * if there are more than MAXMODES to go.
1617                                                  */
1618                                                 if ((ourTS >= TS) || (this->Instance->ULine(who->server)))
1619                                                 {
1620                                                         /* We also always let u-lined clients win, no matter what the TS value */
1621                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1622                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1623                                                         if (ourTS != TS)
1624                                                         {
1625                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1626                                                                 us->age = TS;
1627                                                                 ourTS = TS;
1628                                                         }
1629                                                 }
1630                                                 strcpy(mode_users[1],"+");
1631                                                 for (unsigned int f = 2; f < modectr; f++)
1632                                                         free(mode_users[f]);
1633                                                 modectr = 2;
1634                                         }
1635                                 }
1636                                 else
1637                                 {
1638                                         Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
1639                                         continue;
1640                                 }
1641                         }
1642                 }
1643                 /* there werent enough modes built up to flush it during FJOIN,
1644                  * or, there are a number left over. flush them out.
1645                  */
1646                 if ((modectr > 2) && (who) && (us))
1647                 {
1648                         if (ourTS >= TS)
1649                         {
1650                                 Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1651                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1652                                 if (ourTS != TS)
1653                                 {
1654                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1655                                         us->age = TS;
1656                                         ourTS = TS;
1657                                 }
1658                         }
1659
1660                         for (unsigned int f = 2; f < modectr; f++)
1661                                 free(mode_users[f]);
1662                 }
1663                 return true;
1664         }
1665
1666         /** NICK command */
1667         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1668         {
1669                 if (params.size() < 8)
1670                         return true;
1671                 if (params.size() > 8)
1672                 {
1673                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1674                         return true;
1675                 }
1676                 // NICK age nick host dhost ident +modes ip :gecos
1677                 //       0    1   2     3     4      5   6     7
1678                 time_t age = atoi(params[0].c_str());
1679
1680                 /* This used to have a pretty craq'y loop doing the same thing,
1681                  * now we just let the STL do the hard work (more efficiently)
1682                  */
1683                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1684                 if (pos_after_plus != std::string::npos)
1685                         params[5] = params[5].substr(pos_after_plus);
1686
1687                 const char* tempnick = params[1].c_str();
1688                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1689
1690                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1691
1692                 if (iter != this->Instance->clientlist.end())
1693                 {
1694                         // nick collision
1695                         Instance->Log(DEBUG,"Nick collision on %s!%s@%s: %lu %lu",tempnick,params[4].c_str(),params[2].c_str(),(unsigned long)age,(unsigned long)iter->second->age);
1696                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1697                         return true;
1698                 }
1699
1700                 userrec* _new = new userrec(this->Instance);
1701                 this->Instance->clientlist[tempnick] = _new;
1702                 _new->SetFd(FD_MAGIC_NUMBER);
1703                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1704                 strlcpy(_new->host, params[2].c_str(),63);
1705                 strlcpy(_new->dhost, params[3].c_str(),63);
1706                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1707                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1708                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1709                 _new->registered = REG_ALL;
1710                 _new->signon = age;
1711
1712                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1713                         _new->modes[(*v)-65] = 1;
1714
1715 #ifdef SUPPORT_IP6LINKS
1716                 if (params[6].find_first_of(":") != std::string::npos)
1717                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1718                 else
1719 #endif
1720                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1721
1722                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1723
1724                 params[7] = ":" + params[7];
1725                 DoOneToAllButSender(source,"NICK",params,source);
1726
1727                 // Increment the Source Servers User Count..
1728                 TreeServer* SourceServer = FindServer(source);
1729                 if (SourceServer)
1730                 {
1731                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1732                         SourceServer->AddUserCount();
1733                 }
1734
1735                 return true;
1736         }
1737
1738         /** Send one or more FJOINs for a channel of users.
1739          * If the length of a single line is more than 480-NICKMAX
1740          * in length, it is split over multiple lines.
1741          */
1742         void SendFJoins(TreeServer* Current, chanrec* c)
1743         {
1744                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1745                 char list[MAXBUF];
1746                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1747
1748                 size_t dlen, curlen;
1749                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1750                 int numusers = 0;
1751                 char* ptr = list + dlen;
1752
1753                 CUList *ulist = c->GetUsers();
1754                 std::vector<userrec*> specific_halfop;
1755                 std::vector<userrec*> specific_voice;
1756                 std::string modes = "";
1757                 std::string params = "";
1758
1759                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1760                 {
1761                         // The first parameter gets a : before it
1762                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1763
1764                         curlen += ptrlen;
1765                         ptr += ptrlen;
1766
1767                         numusers++;
1768
1769                         if (curlen > (480-NICKMAX))
1770                         {
1771                                 this->WriteLine(list);
1772                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1773                                 ptr = list + dlen;
1774                                 ptrlen = 0;
1775                                 numusers = 0;
1776                         }
1777                 }
1778
1779                 if (numusers)
1780                         this->WriteLine(list);
1781
1782                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1783                 {
1784                         modes.append("b");
1785                         params.append(b->data).append(" ");
1786                 }
1787                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1788         }
1789
1790         /** Send G, Q, Z and E lines */
1791         void SendXLines(TreeServer* Current)
1792         {
1793                 char data[MAXBUF];
1794                 std::string n = this->Instance->Config->ServerName;
1795                 const char* sn = n.c_str();
1796                 int iterations = 0;
1797                 /* Yes, these arent too nice looking, but they get the job done */
1798                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1799                 {
1800                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1801                         this->WriteLine(data);
1802                 }
1803                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1804                 {
1805                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1806                         this->WriteLine(data);
1807                 }
1808                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1809                 {
1810                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1811                         this->WriteLine(data);
1812                 }
1813                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1814                 {
1815                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1816                         this->WriteLine(data);
1817                 }
1818                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1819                 {
1820                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1821                         this->WriteLine(data);
1822                 }
1823                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1824                 {
1825                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1826                         this->WriteLine(data);
1827                 }
1828                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1829                 {
1830                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1831                         this->WriteLine(data);
1832                 }
1833                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1834                 {
1835                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1836                         this->WriteLine(data);
1837                 }
1838         }
1839
1840         /** Send channel modes and topics */
1841         void SendChannelModes(TreeServer* Current)
1842         {
1843                 char data[MAXBUF];
1844                 std::deque<std::string> list;
1845                 int iterations = 0;
1846                 std::string n = this->Instance->Config->ServerName;
1847                 const char* sn = n.c_str();
1848                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1849                 {
1850                         SendFJoins(Current, c->second);
1851                         if (*c->second->topic)
1852                         {
1853                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1854                                 this->WriteLine(data);
1855                         }
1856                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1857                         list.clear();
1858                         c->second->GetExtList(list);
1859                         for (unsigned int j = 0; j < list.size(); j++)
1860                         {
1861                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1862                         }
1863                 }
1864         }
1865
1866         /** send all users and their oper state/modes */
1867         void SendUsers(TreeServer* Current)
1868         {
1869                 char data[MAXBUF];
1870                 std::deque<std::string> list;
1871                 int iterations = 0;
1872                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
1873                 {
1874                         if (u->second->registered == REG_ALL)
1875                         {
1876                                 snprintf(data,MAXBUF,":%s NICK %lu %s %s %s %s +%s %s :%s",u->second->server,(unsigned long)u->second->age,u->second->nick,u->second->host,u->second->dhost,u->second->ident,u->second->FormatModes(),u->second->GetIPString(),u->second->fullname);
1877                                 this->WriteLine(data);
1878                                 if (*u->second->oper)
1879                                 {
1880                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1881                                 }
1882                                 if (*u->second->awaymsg)
1883                                 {
1884                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1885                                 }
1886                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1887                                 list.clear();
1888                                 u->second->GetExtList(list);
1889                                 for (unsigned int j = 0; j < list.size(); j++)
1890                                 {
1891                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1892                                 }
1893                         }
1894                 }
1895         }
1896
1897         /** This function is called when we want to send a netburst to a local
1898          * server. There is a set order we must do this, because for example
1899          * users require their servers to exist, and channels require their
1900          * users to exist. You get the idea.
1901          */
1902         void DoBurst(TreeServer* s)
1903         {
1904                 std::string burst = "BURST "+ConvToStr(time(NULL));
1905                 std::string endburst = "ENDBURST";
1906                 // Because by the end of the netburst, it  could be gone!
1907                 std::string name = s->GetName();
1908                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
1909                 this->WriteLine(burst);
1910                 /* send our version string */
1911                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
1912                 /* Send server tree */
1913                 this->SendServers(TreeRoot,s,1);
1914                 /* Send users and their oper status */
1915                 this->SendUsers(s);
1916                 /* Send everything else (channel modes, xlines etc) */
1917                 this->SendChannelModes(s);
1918                 this->SendXLines(s);
1919                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1920                 this->WriteLine(endburst);
1921                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
1922         }
1923
1924         /** This function is called when we receive data from a remote
1925          * server. We buffer the data in a std::string (it doesnt stay
1926          * there for long), reading using InspSocket::Read() which can
1927          * read up to 16 kilobytes in one operation.
1928          *
1929          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1930          * THE SOCKET OBJECT FOR US.
1931          */
1932         virtual bool OnDataReady()
1933         {
1934                 char* data = this->Read();
1935                 /* Check that the data read is a valid pointer and it has some content */
1936                 if (data && *data)
1937                 {
1938                         this->in_buffer.append(data);
1939                         /* While there is at least one new line in the buffer,
1940                          * do something useful (we hope!) with it.
1941                          */
1942                         while (in_buffer.find("\n") != std::string::npos)
1943                         {
1944                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1945                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1946                                 if (ret.find("\r") != std::string::npos)
1947                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1948                                 /* Process this one, abort if it
1949                                  * didnt return true.
1950                                  */
1951                                 if (this->ctx_in)
1952                                 {
1953                                         char out[1024];
1954                                         char result[1024];
1955                                         memset(result,0,1024);
1956                                         memset(out,0,1024);
1957                                         Instance->Log(DEBUG,"Original string '%s'",ret.c_str());
1958                                         /* ERROR + CAPAB is still allowed unencryped */
1959                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1960                                         {
1961                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1962                                                 if ((nbytes > 0) && (nbytes < 1024))
1963                                                 {
1964                                                         Instance->Log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1965                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1966                                                         for (int t = 0; t < nbytes; t++)
1967                                                                 if (result[t] == '\7') result[t] = 0;
1968                                                         ret = result;
1969                                                 }
1970                                         }
1971                                 }
1972                                 if (!this->ProcessLine(ret))
1973                                 {
1974                                         Instance->Log(DEBUG,"ProcessLine says no!");
1975                                         return false;
1976                                 }
1977                         }
1978                         return true;
1979                 }
1980                 /* EAGAIN returns an empty but non-NULL string, so this
1981                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1982                  */
1983                 return (data && !*data);
1984         }
1985
1986         int WriteLine(std::string line)
1987         {
1988                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
1989                 if (this->ctx_out)
1990                 {
1991                         char result[10240];
1992                         char result64[10240];
1993                         if (this->keylength)
1994                         {
1995                                 // pad it to the key length
1996                                 int n = this->keylength - (line.length() % this->keylength);
1997                                 if (n)
1998                                 {
1999                                         Instance->Log(DEBUG,"Append %d chars to line to make it %d long from %d, key length %d",n,n+line.length(),line.length(),this->keylength);
2000                                         line.append(n,'\7');
2001                                 }
2002                         }
2003                         unsigned int ll = line.length();
2004                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2005                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2006                         line = result64;
2007                         //int from64tobits(char *out, const char *in, int maxlen);
2008                 }
2009                 return this->Write(line + "\r\n");
2010         }
2011
2012         /* Handle ERROR command */
2013         bool Error(std::deque<std::string> &params)
2014         {
2015                 if (params.size() < 1)
2016                         return false;
2017                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2018                 /* we will return false to cause the socket to close. */
2019                 return false;
2020         }
2021
2022         /** remote MOTD. leet, huh? */
2023         bool Motd(std::string prefix, std::deque<std::string> &params)
2024         {
2025                 if (params.size() > 0)
2026                 {
2027                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2028                         {
2029                                 /* It's for our server */
2030                                 string_list results;
2031                                 userrec* source = this->Instance->FindNick(prefix);
2032
2033                                 if (source)
2034                                 {
2035                                         std::deque<std::string> par;
2036                                         par.push_back(prefix);
2037                                         par.push_back("");
2038
2039                                         if (!Instance->Config->MOTD.size())
2040                                         {
2041                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2042                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2043                                                 return true;
2044                                         }
2045
2046                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2047                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2048
2049                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2050                                         {
2051                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2052                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2053                                         }
2054
2055                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2056                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2057                                 }
2058                         }
2059                         else
2060                         {
2061                                 /* Pass it on */
2062                                 userrec* source = this->Instance->FindNick(prefix);
2063                                 if (source)
2064                                         DoOneToOne(prefix, "MOTD", params, params[0]);
2065                         }
2066                 }
2067                 return true;
2068         }
2069
2070         /** remote ADMIN. leet, huh? */
2071         bool Admin(std::string prefix, std::deque<std::string> &params)
2072         {
2073                 if (params.size() > 0)
2074                 {
2075                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2076                         {
2077                                 /* It's for our server */
2078                                 string_list results;
2079                                 userrec* source = this->Instance->FindNick(prefix);
2080
2081                                 if (source)
2082                                 {
2083                                         std::deque<std::string> par;
2084                                         par.push_back(prefix);
2085                                         par.push_back("");
2086
2087                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2088                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2089
2090                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2091                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2092
2093                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2094                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2095
2096                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2097                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2098                                 }
2099                         }
2100                         else
2101                         {
2102                                 /* Pass it on */
2103                                 userrec* source = this->Instance->FindNick(prefix);
2104                                 if (source)
2105                                         DoOneToOne(prefix, "ADMIN", params, params[0]);
2106                         }
2107                 }
2108                 return true;
2109         }
2110
2111         bool Stats(std::string prefix, std::deque<std::string> &params)
2112         {
2113                 /* Get the reply to a STATS query if it matches this servername,
2114                  * and send it back as a load of PUSH queries
2115                  */
2116                 if (params.size() > 1)
2117                 {
2118                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2119                         {
2120                                 /* It's for our server */
2121                                 string_list results;
2122                                 userrec* source = this->Instance->FindNick(prefix);
2123                                 if (source)
2124                                 {
2125                                         std::deque<std::string> par;
2126                                         par.push_back(prefix);
2127                                         par.push_back("");
2128                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2129                                         for (size_t i = 0; i < results.size(); i++)
2130                                         {
2131                                                 par[1] = "::" + results[i];
2132                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2133                                         }
2134                                 }
2135                         }
2136                         else
2137                         {
2138                                 /* Pass it on */
2139                                 userrec* source = this->Instance->FindNick(prefix);
2140                                 if (source)
2141                                         DoOneToOne(prefix, "STATS", params, params[1]);
2142                         }
2143                 }
2144                 return true;
2145         }
2146
2147
2148         /** Because the core won't let users or even SERVERS set +o,
2149          * we use the OPERTYPE command to do this.
2150          */
2151         bool OperType(std::string prefix, std::deque<std::string> &params)
2152         {
2153                 if (params.size() != 1)
2154                 {
2155                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2156                         return true;
2157                 }
2158                 std::string opertype = params[0];
2159                 userrec* u = this->Instance->FindNick(prefix);
2160                 if (u)
2161                 {
2162                         u->modes[UM_OPERATOR] = 1;
2163                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2164                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2165                 }
2166                 return true;
2167         }
2168
2169         /** Because Andy insists that services-compatible servers must
2170          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2171          */
2172         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2173         {
2174                 if (params.size() < 3)
2175                         return true;
2176
2177                 userrec* u = this->Instance->FindNick(params[0]);
2178
2179                 if (u)
2180                 {
2181                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2182                         if (IS_LOCAL(u))
2183                         {
2184                                 std::deque<std::string> par;
2185                                 par.push_back(params[1]);
2186                                 /* This is not required as one is sent in OnUserPostNick below
2187                                  */
2188                                 //DoOneToMany(u->nick,"NICK",par);
2189                                 if (!u->ForceNickChange(params[1].c_str()))
2190                                 {
2191                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2192                                         return true;
2193                                 }
2194                                 u->age = atoi(params[2].c_str());
2195                         }
2196                 }
2197                 return true;
2198         }
2199
2200         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2201         {
2202                 if (params.size() < 2)
2203                         return true;
2204
2205                 userrec* u = this->Instance->FindNick(params[0]);
2206
2207                 if (u)
2208                 {
2209                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2210                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2211                 }
2212                 return true;
2213         }
2214
2215         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2216         {
2217                 if (params.size() < 1)
2218                         return false;
2219
2220                 std::string servermask = params[0];
2221
2222                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2223                 {
2224                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2225                         this->Instance->RehashServer();
2226                         ReadConfiguration(false);
2227                 }
2228                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2229                 return true;
2230         }
2231
2232         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2233         {
2234                 if (params.size() != 2)
2235                         return true;
2236
2237                 std::string nick = params[0];
2238                 userrec* u = this->Instance->FindNick(prefix);
2239                 userrec* who = this->Instance->FindNick(nick);
2240
2241                 if (who)
2242                 {
2243                         /* Prepend kill source, if we don't have one */
2244                         std::string sourceserv = prefix;
2245                         if (u)
2246                         {
2247                                 sourceserv = u->server;
2248                         }
2249                         if (*(params[1].c_str()) != '[')
2250                         {
2251                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2252                         }
2253                         std::string reason = params[1];
2254                         params[1] = ":" + params[1];
2255                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2256                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2257                         userrec::QuitUser(this->Instance,who,reason);
2258                 }
2259                 return true;
2260         }
2261
2262         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2263         {
2264                 if (params.size() < 1)
2265                         return true;
2266
2267                 if (params.size() == 1)
2268                 {
2269                         TreeServer* ServerSource = FindServer(prefix);
2270                         if (ServerSource)
2271                         {
2272                                 ServerSource->SetPingFlag();
2273                         }
2274                 }
2275                 else
2276                 {
2277                         std::string forwardto = params[1];
2278                         if (forwardto == this->Instance->Config->ServerName)
2279                         {
2280                                 /*
2281                                  * this is a PONG for us
2282                                  * if the prefix is a user, check theyre local, and if they are,
2283                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2284                                  * Services might want to send these s->s, but we dont need to yet.
2285                                  */
2286                                 userrec* u = this->Instance->FindNick(prefix);
2287
2288                                 if (u)
2289                                 {
2290                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2291                                 }
2292                         }
2293                         else
2294                         {
2295                                 // not for us, pass it on :)
2296                                 DoOneToOne(prefix,"PONG",params,forwardto);
2297                         }
2298                 }
2299
2300                 return true;
2301         }
2302
2303         bool MetaData(std::string prefix, std::deque<std::string> &params)
2304         {
2305                 if (params.size() < 3)
2306                         return true;
2307
2308                 TreeServer* ServerSource = FindServer(prefix);
2309
2310                 if (ServerSource)
2311                 {
2312                         if (params[0] == "*")
2313                         {
2314                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2315                         }
2316                         else if (*(params[0].c_str()) == '#')
2317                         {
2318                                 chanrec* c = this->Instance->FindChan(params[0]);
2319                                 if (c)
2320                                 {
2321                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2322                                 }
2323                         }
2324                         else if (*(params[0].c_str()) != '#')
2325                         {
2326                                 userrec* u = this->Instance->FindNick(params[0]);
2327                                 if (u)
2328                                 {
2329                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2330                                 }
2331                         }
2332                 }
2333
2334                 params[2] = ":" + params[2];
2335                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2336                 return true;
2337         }
2338
2339         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2340         {
2341                 if (params.size() < 1)
2342                         return true;
2343
2344                 TreeServer* ServerSource = FindServer(prefix);
2345
2346                 if (ServerSource)
2347                 {
2348                         ServerSource->SetVersion(params[0]);
2349                 }
2350                 params[0] = ":" + params[0];
2351                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2352                 return true;
2353         }
2354
2355         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2356         {
2357                 if (params.size() < 1)
2358                         return true;
2359
2360                 userrec* u = this->Instance->FindNick(prefix);
2361
2362                 if (u)
2363                 {
2364                         u->ChangeDisplayedHost(params[0].c_str());
2365                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2366                 }
2367                 return true;
2368         }
2369
2370         bool AddLine(std::string prefix, std::deque<std::string> &params)
2371         {
2372                 if (params.size() < 6)
2373                         return true;
2374
2375                 bool propogate = false;
2376
2377                 switch (*(params[0].c_str()))
2378                 {
2379                         case 'Z':
2380                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2381                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2382                         break;
2383                         case 'Q':
2384                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2385                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2386                         break;
2387                         case 'E':
2388                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2389                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2390                         break;
2391                         case 'G':
2392                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2393                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2394                         break;
2395                         case 'K':
2396                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2397                         break;
2398                         default:
2399                                 /* Just in case... */
2400                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2401                                 propogate = false;
2402                         break;
2403                 }
2404
2405                 /* Send it on its way */
2406                 if (propogate)
2407                 {
2408                         if (atoi(params[4].c_str()))
2409                         {
2410                                 this->Instance->SNO->WriteToSnoMask('x',"%s Added %cLINE on %s to expire in %lu seconds (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),atoi(params[4].c_str()),params[5].c_str());
2411                         }
2412                         else
2413                         {
2414                                 this->Instance->SNO->WriteToSnoMask('x',"%s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
2415                         }
2416                         params[5] = ":" + params[5];
2417                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2418                 }
2419                 if (!this->bursting)
2420                 {
2421                         Instance->Log(DEBUG,"Applying lines...");
2422                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2423                 }
2424                 return true;
2425         }
2426
2427         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2428         {
2429                 if (params.size() < 1)
2430                         return true;
2431
2432                 userrec* u = this->Instance->FindNick(prefix);
2433
2434                 if (u)
2435                 {
2436                         u->ChangeName(params[0].c_str());
2437                         params[0] = ":" + params[0];
2438                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2439                 }
2440                 return true;
2441         }
2442
2443         bool Whois(std::string prefix, std::deque<std::string> &params)
2444         {
2445                 if (params.size() < 1)
2446                         return true;
2447
2448                 Instance->Log(DEBUG,"In IDLE command");
2449                 userrec* u = this->Instance->FindNick(prefix);
2450
2451                 if (u)
2452                 {
2453                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2454                         // an incoming request
2455                         if (params.size() == 1)
2456                         {
2457                                 userrec* x = this->Instance->FindNick(params[0]);
2458                                 if ((x) && (IS_LOCAL(x)))
2459                                 {
2460                                         userrec* x = this->Instance->FindNick(params[0]);
2461                                         char signon[MAXBUF];
2462                                         char idle[MAXBUF];
2463
2464                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2465                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2466                                         std::deque<std::string> par;
2467                                         par.push_back(prefix);
2468                                         par.push_back(signon);
2469                                         par.push_back(idle);
2470                                         // ours, we're done, pass it BACK
2471                                         DoOneToOne(params[0],"IDLE",par,u->server);
2472                                 }
2473                                 else
2474                                 {
2475                                         // not ours pass it on
2476                                         DoOneToOne(prefix,"IDLE",params,x->server);
2477                                 }
2478                         }
2479                         else if (params.size() == 3)
2480                         {
2481                                 std::string who_did_the_whois = params[0];
2482                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2483                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2484                                 {
2485                                         // an incoming reply to a whois we sent out
2486                                         std::string nick_whoised = prefix;
2487                                         unsigned long signon = atoi(params[1].c_str());
2488                                         unsigned long idle = atoi(params[2].c_str());
2489                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2490                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2491                                 }
2492                                 else
2493                                 {
2494                                         // not ours, pass it on
2495                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2496                                 }
2497                         }
2498                 }
2499                 return true;
2500         }
2501
2502         bool Push(std::string prefix, std::deque<std::string> &params)
2503         {
2504                 if (params.size() < 2)
2505                         return true;
2506
2507                 userrec* u = this->Instance->FindNick(params[0]);
2508
2509                 if (!u)
2510                         return true;
2511
2512                 if (IS_LOCAL(u))
2513                 {
2514                         u->Write(params[1]);
2515                 }
2516                 else
2517                 {
2518                         // continue the raw onwards
2519                         params[1] = ":" + params[1];
2520                         DoOneToOne(prefix,"PUSH",params,u->server);
2521                 }
2522                 return true;
2523         }
2524
2525         bool Time(std::string prefix, std::deque<std::string> &params)
2526         {
2527                 // :source.server TIME remote.server sendernick
2528                 // :remote.server TIME source.server sendernick TS
2529                 if (params.size() == 2)
2530                 {
2531                         // someone querying our time?
2532                         if (this->Instance->Config->ServerName == params[0])
2533                         {
2534                                 userrec* u = this->Instance->FindNick(params[1]);
2535                                 if (u)
2536                                 {
2537                                         char curtime[256];
2538                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2539                                         params.push_back(curtime);
2540                                         params[0] = prefix;
2541                                         DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2542                                 }
2543                         }
2544                         else
2545                         {
2546                                 // not us, pass it on
2547                                 userrec* u = this->Instance->FindNick(params[1]);
2548                                 if (u)
2549                                         DoOneToOne(prefix,"TIME",params,params[0]);
2550                         }
2551                 }
2552                 else if (params.size() == 3)
2553                 {
2554                         // a response to a previous TIME
2555                         userrec* u = this->Instance->FindNick(params[1]);
2556                         if ((u) && (IS_LOCAL(u)))
2557                         {
2558                         time_t rawtime = atol(params[2].c_str());
2559                         struct tm * timeinfo;
2560                         timeinfo = localtime(&rawtime);
2561                                 char tms[26];
2562                                 snprintf(tms,26,"%s",asctime(timeinfo));
2563                                 tms[24] = 0;
2564                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2565                         }
2566                         else
2567                         {
2568                                 if (u)
2569                                         DoOneToOne(prefix,"TIME",params,u->server);
2570                         }
2571                 }
2572                 return true;
2573         }
2574
2575         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2576         {
2577                 if (params.size() < 1)
2578                         return true;
2579
2580                 if (params.size() == 1)
2581                 {
2582                         std::string stufftobounce = params[0];
2583                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2584                         return true;
2585                 }
2586                 else
2587                 {
2588                         std::string forwardto = params[1];
2589                         if (forwardto == this->Instance->Config->ServerName)
2590                         {
2591                                 // this is a ping for us, send back PONG to the requesting server
2592                                 params[1] = params[0];
2593                                 params[0] = forwardto;
2594                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2595                         }
2596                         else
2597                         {
2598                                 // not for us, pass it on :)
2599                                 DoOneToOne(prefix,"PING",params,forwardto);
2600                         }
2601                         return true;
2602                 }
2603         }
2604
2605         bool RemoveStatus(std::string prefix, std::deque<std::string> &params)
2606         {
2607                 if (params.size() < 1)
2608                         return true;
2609
2610                 chanrec* c = Instance->FindChan(params[0]);
2611
2612                 if (c)
2613                 {
2614                         CUList *ulist = c->GetUsers();
2615                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2616                         {
2617                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2618                                 if (modesequence.length())
2619                                 {
2620                                         modesequence = "-" + modesequence;
2621
2622                                         std::deque<std::string> items;
2623                                         const char* y[127];
2624                                         unsigned int z = 0;
2625                                         std::string x = "*";
2626                                         irc::spacesepstream sep(modesequence);
2627
2628                                         while ((x = sep.GetToken()) != "")
2629                                         {
2630                                                 if (!z)
2631                                                 {
2632                                                         y[z++] = c->name;
2633                                                         items.push_back(c->name);
2634                                                         items.push_back(ConvToStr(c->age));
2635                                                 }
2636                                                 items.push_back(x);
2637                                                 y[z++] = (items.end() - 1)->c_str();
2638                                         }
2639
2640                                         DoOneToMany(Instance->Config->ServerName, "FMODE", items);
2641                                         userrec* n = new userrec(Instance);
2642                                         n->SetFd(FD_MAGIC_NUMBER);
2643                                         Instance->SendMode(y,z,n);
2644                                         delete n;
2645                                 }
2646                         }
2647                 }
2648                 return true;
2649         }
2650
2651         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2652         {
2653                 if (params.size() < 4)
2654                         return false;
2655
2656                 std::string servername = params[0];
2657                 std::string password = params[1];
2658                 // hopcount is not used for a remote server, we calculate this ourselves
2659                 std::string description = params[3];
2660                 TreeServer* ParentOfThis = FindServer(prefix);
2661
2662                 if (!ParentOfThis)
2663                 {
2664                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2665                         return false;
2666                 }
2667                 TreeServer* CheckDupe = FindServer(servername);
2668                 if (CheckDupe)
2669                 {
2670                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2671                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2672                         return false;
2673                 }
2674                 TreeServer* Node = new TreeServer(this->Instance,servername,description,ParentOfThis,NULL);
2675                 ParentOfThis->AddChild(Node);
2676                 params[3] = ":" + params[3];
2677                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2678                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2679                 return true;
2680         }
2681
2682         bool Outbound_Reply_Server(std::deque<std::string> &params)
2683         {
2684                 if (params.size() < 4)
2685                         return false;
2686
2687                 irc::string servername = params[0].c_str();
2688                 std::string sname = params[0];
2689                 std::string password = params[1];
2690                 int hops = atoi(params[2].c_str());
2691
2692                 if (hops)
2693                 {
2694                         this->WriteLine("ERROR :Server too far away for authentication");
2695                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2696                         return false;
2697                 }
2698                 std::string description = params[3];
2699                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2700                 {
2701                         if ((x->Name == servername) && (x->RecvPass == password))
2702                         {
2703                                 TreeServer* CheckDupe = FindServer(sname);
2704                                 if (CheckDupe)
2705                                 {
2706                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2707                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2708                                         return false;
2709                                 }
2710                                 // Begin the sync here. this kickstarts the
2711                                 // other side, waiting in WAIT_AUTH_2 state,
2712                                 // into starting their burst, as it shows
2713                                 // that we're happy.
2714                                 this->LinkState = CONNECTED;
2715                                 // we should add the details of this server now
2716                                 // to the servers tree, as a child of the root
2717                                 // node.
2718                                 TreeServer* Node = new TreeServer(this->Instance,sname,description,TreeRoot,this);
2719                                 TreeRoot->AddChild(Node);
2720                                 params[3] = ":" + params[3];
2721                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2722                                 this->bursting = true;
2723                                 this->DoBurst(Node);
2724                                 return true;
2725                         }
2726                 }
2727                 this->WriteLine("ERROR :Invalid credentials");
2728                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2729                 return false;
2730         }
2731
2732         bool Inbound_Server(std::deque<std::string> &params)
2733         {
2734                 if (params.size() < 4)
2735                         return false;
2736
2737                 irc::string servername = params[0].c_str();
2738                 std::string sname = params[0];
2739                 std::string password = params[1];
2740                 int hops = atoi(params[2].c_str());
2741
2742                 if (hops)
2743                 {
2744                         this->WriteLine("ERROR :Server too far away for authentication");
2745                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2746                         return false;
2747                 }
2748                 std::string description = params[3];
2749                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2750                 {
2751                         if ((x->Name == servername) && (x->RecvPass == password))
2752                         {
2753                                 TreeServer* CheckDupe = FindServer(sname);
2754                                 if (CheckDupe)
2755                                 {
2756                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2757                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2758                                         return false;
2759                                 }
2760                                 /* If the config says this link is encrypted, but the remote side
2761                                  * hasnt bothered to send the AES command before SERVER, then we
2762                                  * boot them off as we MUST have this connection encrypted.
2763                                  */
2764                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2765                                 {
2766                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2767                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2768                                         return false;
2769                                 }
2770                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2771                                 this->InboundServerName = sname;
2772                                 this->InboundDescription = description;
2773                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2774                                 // along with the sendpass from this block.
2775                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2776                                 // move to the next state, we are now waiting for THEM.
2777                                 this->LinkState = WAIT_AUTH_2;
2778                                 return true;
2779                         }
2780                 }
2781                 this->WriteLine("ERROR :Invalid credentials");
2782                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2783                 return false;
2784         }
2785
2786         void Split(std::string line, std::deque<std::string> &n)
2787         {
2788                 n.clear();
2789                 irc::tokenstream tokens(line);
2790                 std::string param;
2791                 while ((param = tokens.GetToken()) != "")
2792                         n.push_back(param);
2793                 return;
2794         }
2795
2796         bool ProcessLine(std::string line)
2797         {
2798                 std::deque<std::string> params;
2799                 irc::string command;
2800                 std::string prefix;
2801
2802                 if (line.empty())
2803                         return true;
2804
2805                 line = line.substr(0, line.find_first_of("\r\n"));
2806
2807                 Instance->Log(DEBUG,"IN: %s", line.c_str());
2808
2809                 this->Split(line.c_str(),params);
2810
2811                 if ((params[0][0] == ':') && (params.size() > 1))
2812                 {
2813                         prefix = params[0].substr(1);
2814                         params.pop_front();
2815                 }
2816
2817                 command = params[0].c_str();
2818                 params.pop_front();
2819
2820                 if ((!this->ctx_in) && (command == "AES"))
2821                 {
2822                         std::string sserv = params[0];
2823                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2824                         {
2825                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2826                                 {
2827                                         this->InitAES(x->EncryptionKey,sserv);
2828                                 }
2829                         }
2830
2831                         return true;
2832                 }
2833                 else if ((this->ctx_in) && (command == "AES"))
2834                 {
2835                         this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Encryption already enabled on this connection yet %s is trying to enable it twice!",params[0].c_str());
2836                 }
2837
2838                 switch (this->LinkState)
2839                 {
2840                         TreeServer* Node;
2841
2842                         case WAIT_AUTH_1:
2843                                 // Waiting for SERVER command from remote server. Server initiating
2844                                 // the connection sends the first SERVER command, listening server
2845                                 // replies with theirs if its happy, then if the initiator is happy,
2846                                 // it starts to send its net sync, which starts the merge, otherwise
2847                                 // it sends an ERROR.
2848                                 if (command == "PASS")
2849                                 {
2850                                         /* Silently ignored */
2851                                 }
2852                                 else if (command == "SERVER")
2853                                 {
2854                                         return this->Inbound_Server(params);
2855                                 }
2856                                 else if (command == "ERROR")
2857                                 {
2858                                         return this->Error(params);
2859                                 }
2860                                 else if (command == "USER")
2861                                 {
2862                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2863                                         return false;
2864                                 }
2865                                 else if (command == "CAPAB")
2866                                 {
2867                                         return this->Capab(params);
2868                                 }
2869                                 else if ((command == "U") || (command == "S"))
2870                                 {
2871                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2872                                         return false;
2873                                 }
2874                                 else
2875                                 {
2876                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2877                                         return false;
2878                                 }
2879                         break;
2880                         case WAIT_AUTH_2:
2881                                 // Waiting for start of other side's netmerge to say they liked our
2882                                 // password.
2883                                 if (command == "SERVER")
2884                                 {
2885                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2886                                         // silently ignore.
2887                                         return true;
2888                                 }
2889                                 else if ((command == "U") || (command == "S"))
2890                                 {
2891                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2892                                         return false;
2893                                 }
2894                                 else if (command == "BURST")
2895                                 {
2896                                         if (params.size())
2897                                         {
2898                                                 /* If a time stamp is provided, try and check syncronization */
2899                                                 time_t THEM = atoi(params[0].c_str());
2900                                                 long delta = THEM-time(NULL);
2901                                                 if ((delta < -600) || (delta > 600))
2902                                                 {
2903                                                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Your clocks are out by %d seconds (this is more than ten minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs(delta));
2904                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2905                                                         return false;
2906                                                 }
2907                                                 else if ((delta < -60) || (delta > 60))
2908                                                 {
2909                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2910                                                 }
2911                                         }
2912                                         this->LinkState = CONNECTED;
2913                                         Node = new TreeServer(this->Instance,InboundServerName,InboundDescription,TreeRoot,this);
2914                                         TreeRoot->AddChild(Node);
2915                                         params.clear();
2916                                         params.push_back(InboundServerName);
2917                                         params.push_back("*");
2918                                         params.push_back("1");
2919                                         params.push_back(":"+InboundDescription);
2920                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2921                                         this->bursting = true;
2922                                         this->DoBurst(Node);
2923                                 }
2924                                 else if (command == "ERROR")
2925                                 {
2926                                         return this->Error(params);
2927                                 }
2928                                 else if (command == "CAPAB")
2929                                 {
2930                                         return this->Capab(params);
2931                                 }
2932
2933                         break;
2934                         case LISTENER:
2935                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2936                                 return false;
2937                         break;
2938                         case CONNECTING:
2939                                 if (command == "SERVER")
2940                                 {
2941                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2942                                         // has just sent us their credentials. If we get this far, theyre
2943                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2944                                         // if we're happy with this, we should send our netburst which
2945                                         // kickstarts the merge.
2946                                         return this->Outbound_Reply_Server(params);
2947                                 }
2948                                 else if (command == "ERROR")
2949                                 {
2950                                         return this->Error(params);
2951                                 }
2952                         break;
2953                         case CONNECTED:
2954                                 // This is the 'authenticated' state, when all passwords
2955                                 // have been exchanged and anything past this point is taken
2956                                 // as gospel.
2957
2958                                 if (prefix != "")
2959                                 {
2960                                         std::string direction = prefix;
2961                                         userrec* t = this->Instance->FindNick(prefix);
2962                                         if (t)
2963                                         {
2964                                                 direction = t->server;
2965                                         }
2966                                         TreeServer* route_back_again = BestRouteTo(direction);
2967                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2968                                         {
2969                                                 if (route_back_again)
2970                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2971                                                 return true;
2972                                         }
2973
2974                                         /* Fix by brain:
2975                                          * When there is activity on the socket, reset the ping counter so
2976                                          * that we're not wasting bandwidth pinging an active server.
2977                                          */
2978                                         route_back_again->SetNextPingTime(time(NULL) + 60);
2979                                         route_back_again->SetPingFlag();
2980                                 }
2981
2982                                 if (command == "SVSMODE")
2983                                 {
2984                                         /* Services expects us to implement
2985                                          * SVSMODE. In inspircd its the same as
2986                                          * MODE anyway.
2987                                          */
2988                                         command = "MODE";
2989                                 }
2990                                 std::string target = "";
2991                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
2992                                  * working with std::string here.
2993                                  */
2994                                 if ((command == "NICK") && (params.size() > 1))
2995                                 {
2996                                         return this->IntroduceClient(prefix,params);
2997                                 }
2998                                 else if (command == "FJOIN")
2999                                 {
3000                                         return this->ForceJoin(prefix,params);
3001                                 }
3002                                 else if (command == "STATS")
3003                                 {
3004                                         return this->Stats(prefix, params);
3005                                 }
3006                                 else if (command == "MOTD")
3007                                 {
3008                                         return this->Motd(prefix, params);
3009                                 }
3010                                 else if (command == "ADMIN")
3011                                 {
3012                                         return this->Admin(prefix, params);
3013                                 }
3014                                 else if (command == "SERVER")
3015                                 {
3016                                         return this->RemoteServer(prefix,params);
3017                                 }
3018                                 else if (command == "ERROR")
3019                                 {
3020                                         return this->Error(params);
3021                                 }
3022                                 else if (command == "OPERTYPE")
3023                                 {
3024                                         return this->OperType(prefix,params);
3025                                 }
3026                                 else if (command == "FMODE")
3027                                 {
3028                                         return this->ForceMode(prefix,params);
3029                                 }
3030                                 else if (command == "KILL")
3031                                 {
3032                                         return this->RemoteKill(prefix,params);
3033                                 }
3034                                 else if (command == "FTOPIC")
3035                                 {
3036                                         return this->ForceTopic(prefix,params);
3037                                 }
3038                                 else if (command == "REHASH")
3039                                 {
3040                                         return this->RemoteRehash(prefix,params);
3041                                 }
3042                                 else if (command == "METADATA")
3043                                 {
3044                                         return this->MetaData(prefix,params);
3045                                 }
3046                                 else if (command == "REMSTATUS")
3047                                 {
3048                                         return this->RemoveStatus(prefix,params);
3049                                 }
3050                                 else if (command == "PING")
3051                                 {
3052                                         /*
3053                                          * We just got a ping from a server that's bursting.
3054                                          * This can't be right, so set them to not bursting, and
3055                                          * apply their lines.
3056                                          */
3057                                         if (this->bursting)
3058                                         {
3059                                                 this->bursting = false;
3060                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3061                                         }
3062                                         if (prefix == "")
3063                                         {
3064                                                 prefix = this->GetName();
3065                                         }
3066                                         return this->LocalPing(prefix,params);
3067                                 }
3068                                 else if (command == "PONG")
3069                                 {
3070                                         /*
3071                                          * We just got a pong from a server that's bursting.
3072                                          * This can't be right, so set them to not bursting, and
3073                                          * apply their lines.
3074                                          */
3075                                         if (this->bursting)
3076                                         {
3077                                                 this->bursting = false;
3078                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3079                                         }
3080                                         if (prefix == "")
3081                                         {
3082                                                 prefix = this->GetName();
3083                                         }
3084                                         return this->LocalPong(prefix,params);
3085                                 }
3086                                 else if (command == "VERSION")
3087                                 {
3088                                         return this->ServerVersion(prefix,params);
3089                                 }
3090                                 else if (command == "FHOST")
3091                                 {
3092                                         return this->ChangeHost(prefix,params);
3093                                 }
3094                                 else if (command == "FNAME")
3095                                 {
3096                                         return this->ChangeName(prefix,params);
3097                                 }
3098                                 else if (command == "ADDLINE")
3099                                 {
3100                                         return this->AddLine(prefix,params);
3101                                 }
3102                                 else if (command == "SVSNICK")
3103                                 {
3104                                         if (prefix == "")
3105                                         {
3106                                                 prefix = this->GetName();
3107                                         }
3108                                         return this->ForceNick(prefix,params);
3109                                 }
3110                                 else if (command == "IDLE")
3111                                 {
3112                                         return this->Whois(prefix,params);
3113                                 }
3114                                 else if (command == "PUSH")
3115                                 {
3116                                         return this->Push(prefix,params);
3117                                 }
3118                                 else if (command == "TIME")
3119                                 {
3120                                         return this->Time(prefix,params);
3121                                 }
3122                                 else if ((command == "KICK") && (IsServer(prefix)))
3123                                 {
3124                                         std::string sourceserv = this->myhost;
3125                                         if (params.size() == 3)
3126                                         {
3127                                                 userrec* user = this->Instance->FindNick(params[1]);
3128                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3129                                                 if (user && chan)
3130                                                 {
3131                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3132                                                                 /* Yikes, the channels gone! */
3133                                                                 delete chan;
3134                                                 }
3135                                         }
3136                                         if (this->InboundServerName != "")
3137                                         {
3138                                                 sourceserv = this->InboundServerName;
3139                                         }
3140                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3141                                 }
3142                                 else if (command == "SVSJOIN")
3143                                 {
3144                                         if (prefix == "")
3145                                         {
3146                                                 prefix = this->GetName();
3147                                         }
3148                                         return this->ServiceJoin(prefix,params);
3149                                 }
3150                                 else if (command == "SQUIT")
3151                                 {
3152                                         if (params.size() == 2)
3153                                         {
3154                                                 this->Squit(FindServer(params[0]),params[1]);
3155                                         }
3156                                         return true;
3157                                 }
3158                                 else if (command == "ENDBURST")
3159                                 {
3160                                         this->bursting = false;
3161                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3162                                         std::string sourceserv = this->myhost;
3163                                         if (this->InboundServerName != "")
3164                                         {
3165                                                 sourceserv = this->InboundServerName;
3166                                         }
3167                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3168                                         return true;
3169                                 }
3170                                 else
3171                                 {
3172                                         // not a special inter-server command.
3173                                         // Emulate the actual user doing the command,
3174                                         // this saves us having a huge ugly parser.
3175                                         userrec* who = this->Instance->FindNick(prefix);
3176                                         std::string sourceserv = this->myhost;
3177                                         if (this->InboundServerName != "")
3178                                         {
3179                                                 sourceserv = this->InboundServerName;
3180                                         }
3181                                         if (who)
3182                                         {
3183                                                 if ((command == "NICK") && (params.size() > 0))
3184                                                 {
3185                                                         /* On nick messages, check that the nick doesnt
3186                                                          * already exist here. If it does, kill their copy,
3187                                                          * and our copy.
3188                                                          */
3189                                                         userrec* x = this->Instance->FindNick(params[0]);
3190                                                         if ((x) && (x != who))
3191                                                         {
3192                                                                 std::deque<std::string> p;
3193                                                                 p.push_back(params[0]);
3194                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3195                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3196                                                                 p.clear();
3197                                                                 p.push_back(prefix);
3198                                                                 p.push_back("Nickname collision");
3199                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3200                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3201                                                                 userrec* y = this->Instance->FindNick(prefix);
3202                                                                 if (y)
3203                                                                 {
3204                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3205                                                                 }
3206                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3207                                                         }
3208                                                 }
3209                                                 // its a user
3210                                                 target = who->server;
3211                                                 const char* strparams[127];
3212                                                 for (unsigned int q = 0; q < params.size(); q++)
3213                                                 {
3214                                                         strparams[q] = params[q].c_str();
3215                                                 }
3216                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3217                                                 {
3218                                                         case CMD_INVALID:
3219                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3220                                                                 return false;
3221                                                         break;
3222                                                         case CMD_FAILURE:
3223                                                                 return true;
3224                                                         break;
3225                                                         default:
3226                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3227                                                         break;
3228                                                 }
3229                                         }
3230                                         else
3231                                         {
3232                                                 // its not a user. Its either a server, or somethings screwed up.
3233                                                 if (IsServer(prefix))
3234                                                 {
3235                                                         target = this->Instance->Config->ServerName;
3236                                                 }
3237                                                 else
3238                                                 {
3239                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3240                                                         return true;
3241                                                 }
3242                                         }
3243                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3244
3245                                 }
3246                                 return true;
3247                         break;
3248                 }
3249                 return true;
3250         }
3251
3252         virtual std::string GetName()
3253         {
3254                 std::string sourceserv = this->myhost;
3255                 if (this->InboundServerName != "")
3256                 {
3257                         sourceserv = this->InboundServerName;
3258                 }
3259                 return sourceserv;
3260         }
3261
3262         virtual void OnTimeout()
3263         {
3264                 if (this->LinkState == CONNECTING)
3265                 {
3266                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3267                         Link* MyLink = FindLink(myhost);
3268                         if (MyLink)
3269                                 DoFailOver(MyLink);
3270                 }
3271         }
3272
3273         virtual void OnClose()
3274         {
3275                 // Connection closed.
3276                 // If the connection is fully up (state CONNECTED)
3277                 // then propogate a netsplit to all peers.
3278                 std::string quitserver = this->myhost;
3279                 if (this->InboundServerName != "")
3280                 {
3281                         quitserver = this->InboundServerName;
3282                 }
3283                 TreeServer* s = FindServer(quitserver);
3284                 if (s)
3285                 {
3286                         Squit(s,"Remote host closed the connection");
3287                 }
3288                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3289         }
3290
3291         virtual int OnIncomingConnection(int newsock, char* ip)
3292         {
3293                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3294                  * or discovering if this port is the server port, we don't allow connections from any
3295                  * IPs for which we don't have a link block.
3296                  */
3297                 bool found = false;
3298
3299                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3300                 if (!found)
3301                 {
3302                         for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
3303                                 if (MatchCIDR(ip, (*i).c_str()))
3304                                         found = true;
3305
3306                         if (!found)
3307                         {
3308                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3309                                 close(newsock);
3310                                 return false;
3311                         }
3312                 }
3313                 TreeSocket* s = new TreeSocket(this->Instance, newsock, ip);
3314                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3315                 return true;
3316         }
3317 };
3318
3319 /** This class is used to resolve server hostnames during /connect and autoconnect.
3320  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3321  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3322  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3323  * will have an IP address which we can then use to continue our connection.
3324  */
3325 class ServernameResolver : public Resolver
3326 {
3327  private:
3328         /** A copy of the Link tag info for what we're connecting to.
3329          * We take a copy, rather than using a pointer, just in case the
3330          * admin takes the tag away and rehashes while the domain is resolving.
3331          */
3332         Link MyLink;
3333  public:
3334         ServernameResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3335         {
3336                 /* Nothing in here, folks */
3337         }
3338
3339         void OnLookupComplete(const std::string &result)
3340         {
3341                 /* Initiate the connection, now that we have an IP to use.
3342                  * Passing a hostname directly to InspSocket causes it to
3343                  * just bail and set its FD to -1.
3344                  */
3345                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3346                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3347                 {
3348                         TreeSocket* newsocket = new TreeSocket(ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3349                         if (newsocket->GetFd() > -1)
3350                         {
3351                                 /* We're all OK */
3352                         }
3353                         else
3354                         {
3355                                 /* Something barfed, show the opers */
3356                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3357                                 delete newsocket;
3358                                 DoFailOver(&MyLink);
3359                         }
3360                 }
3361         }
3362
3363         void OnError(ResolverError e, const std::string &errormessage)
3364         {
3365                 /* Ooops! */
3366                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3367                 DoFailOver(&MyLink);
3368         }
3369 };
3370
3371 class SecurityIPResolver : public Resolver
3372 {
3373  private:
3374         Link MyLink;
3375  public:
3376         SecurityIPResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3377         {
3378         }
3379
3380         void OnLookupComplete(const std::string &result)
3381         {
3382                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3383                 ValidIPs.push_back(result);
3384         }
3385
3386         void OnError(ResolverError e, const std::string &errormessage)
3387         {
3388                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3389         }
3390 };
3391
3392 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3393 {
3394         for (unsigned int c = 0; c < list.size(); c++)
3395         {
3396                 if (list[c] == server)
3397                 {
3398                         return;
3399                 }
3400         }
3401         list.push_back(server);
3402 }
3403
3404 /** returns a list of DIRECT servernames for a specific channel */
3405 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3406 {
3407         CUList *ulist = c->GetUsers();
3408         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3409         {
3410                 if (i->second->GetFd() < 0)
3411                 {
3412                         TreeServer* best = BestRouteTo(i->second->server);
3413                         if (best)
3414                                 AddThisServer(best,list);
3415                 }
3416         }
3417         return;
3418 }
3419
3420 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3421 {
3422         TreeServer* omitroute = BestRouteTo(omit);
3423         if ((command == "NOTICE") || (command == "PRIVMSG"))
3424         {
3425                 if (params.size() >= 2)
3426                 {
3427                         /* Prefixes */
3428                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3429                         {
3430                                 params[0] = params[0].substr(1, params[0].length()-1);
3431                         }
3432                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3433                         {
3434                                 // special routing for private messages/notices
3435                                 userrec* d = ServerInstance->FindNick(params[0]);
3436                                 if (d)
3437                                 {
3438                                         std::deque<std::string> par;
3439                                         par.push_back(params[0]);
3440                                         par.push_back(":"+params[1]);
3441                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3442                                         return true;
3443                                 }
3444                         }
3445                         else if (*(params[0].c_str()) == '$')
3446                         {
3447                                 std::deque<std::string> par;
3448                                 par.push_back(params[0]);
3449                                 par.push_back(":"+params[1]);
3450                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3451                                 return true;
3452                         }
3453                         else
3454                         {
3455                                 ServerInstance->Log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3456                                 chanrec* c = ServerInstance->FindChan(params[0]);
3457                                 if (c)
3458                                 {
3459                                         std::deque<TreeServer*> list;
3460                                         GetListOfServersForChannel(c,list);
3461                                         ServerInstance->Log(DEBUG,"Got a list of %d servers",list.size());
3462                                         unsigned int lsize = list.size();
3463                                         for (unsigned int i = 0; i < lsize; i++)
3464                                         {
3465                                                 TreeSocket* Sock = list[i]->GetSocket();
3466                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3467                                                 {
3468                                                         ServerInstance->Log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3469                                                         Sock->WriteLine(data);
3470                                                 }
3471                                         }
3472                                         return true;
3473                                 }
3474                         }
3475                 }
3476         }
3477         unsigned int items = TreeRoot->ChildCount();
3478         for (unsigned int x = 0; x < items; x++)
3479         {
3480                 TreeServer* Route = TreeRoot->GetChild(x);
3481                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3482                 {
3483                         TreeSocket* Sock = Route->GetSocket();
3484                         if (Sock)
3485                                 Sock->WriteLine(data);
3486                 }
3487         }
3488         return true;
3489 }
3490
3491 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3492 {
3493         TreeServer* omitroute = BestRouteTo(omit);
3494         std::string FullLine = ":" + prefix + " " + command;
3495         unsigned int words = params.size();
3496         for (unsigned int x = 0; x < words; x++)
3497         {
3498                 FullLine = FullLine + " " + params[x];
3499         }
3500         unsigned int items = TreeRoot->ChildCount();
3501         for (unsigned int x = 0; x < items; x++)
3502         {
3503                 TreeServer* Route = TreeRoot->GetChild(x);
3504                 // Send the line IF:
3505                 // The route has a socket (its a direct connection)
3506                 // The route isnt the one to be omitted
3507                 // The route isnt the path to the one to be omitted
3508                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3509                 {
3510                         TreeSocket* Sock = Route->GetSocket();
3511                         if (Sock)
3512                                 Sock->WriteLine(FullLine);
3513                 }
3514         }
3515         return true;
3516 }
3517
3518 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3519 {
3520         std::string FullLine = ":" + prefix + " " + command;
3521         unsigned int words = params.size();
3522         for (unsigned int x = 0; x < words; x++)
3523         {
3524                 FullLine = FullLine + " " + params[x];
3525         }
3526         unsigned int items = TreeRoot->ChildCount();
3527         for (unsigned int x = 0; x < items; x++)
3528         {
3529                 TreeServer* Route = TreeRoot->GetChild(x);
3530                 if (Route && Route->GetSocket())
3531                 {
3532                         TreeSocket* Sock = Route->GetSocket();
3533                         if (Sock)
3534                                 Sock->WriteLine(FullLine);
3535                 }
3536         }
3537         return true;
3538 }
3539
3540 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3541 {
3542         std::string spfx = prefix;
3543         std::string scmd = command;
3544         return DoOneToMany(spfx, scmd, params);
3545 }
3546
3547 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3548 {
3549         std::string spfx = prefix;
3550         std::string scmd = command;
3551         return DoOneToAllButSender(spfx, scmd, params, omit);
3552 }
3553
3554 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3555 {
3556         TreeServer* Route = BestRouteTo(target);
3557         if (Route)
3558         {
3559                 std::string FullLine = ":" + prefix + " " + command;
3560                 unsigned int words = params.size();
3561                 for (unsigned int x = 0; x < words; x++)
3562                 {
3563                         FullLine = FullLine + " " + params[x];
3564                 }
3565                 if (Route && Route->GetSocket())
3566                 {
3567                         TreeSocket* Sock = Route->GetSocket();
3568                         if (Sock)
3569                                 Sock->WriteLine(FullLine);
3570                 }
3571                 return true;
3572         }
3573         else
3574         {
3575                 return false;
3576         }
3577 }
3578
3579 std::vector<TreeSocket*> Bindings;
3580
3581 void ReadConfiguration(bool rebind)
3582 {
3583         Conf = new ConfigReader(ServerInstance);
3584         if (rebind)
3585         {
3586                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3587                 {
3588                         std::string Type = Conf->ReadValue("bind","type",j);
3589                         std::string IP = Conf->ReadValue("bind","address",j);
3590                         long Port = Conf->ReadInteger("bind","port",j,true);
3591                         if (Type == "servers")
3592                         {
3593                                 if (IP == "*")
3594                                 {
3595                                         IP = "";
3596                                 }
3597                                 TreeSocket* listener = new TreeSocket(ServerInstance, IP.c_str(),Port,true,10);
3598                                 if (listener->GetState() == I_LISTENING)
3599                                 {
3600                                         Bindings.push_back(listener);
3601                                 }
3602                                 else
3603                                 {
3604                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3605                                         listener->Close();
3606                                         DELETE(listener);
3607                                 }
3608                         }
3609                 }
3610         }
3611         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3612         HideULines = Conf->ReadFlag("options","hideulines",0);
3613         LinkBlocks.clear();
3614         ValidIPs.clear();
3615         for (int j =0; j < Conf->Enumerate("link"); j++)
3616         {
3617                 Link L;
3618                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3619                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3620                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3621                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3622                 L.Port = Conf->ReadInteger("link","port",j,true);
3623                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3624                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3625                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3626                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3627                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3628                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3629                 /* Bugfix by brain, do not allow people to enter bad configurations */
3630                 if (L.Name != ServerInstance->Config->ServerName)
3631                 {
3632                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3633                         {
3634                                 ValidIPs.push_back(L.IPAddr);
3635
3636                                 if (Allow.length())
3637                                         ValidIPs.push_back(Allow);
3638
3639                                 /* Needs resolving */
3640                                 insp_inaddr binip;
3641                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3642                                 {
3643                                         try
3644                                         {
3645                                                 SecurityIPResolver* sr = new SecurityIPResolver(ServerInstance, L.IPAddr, L);
3646                                                 ServerInstance->AddResolver(sr);
3647                                         }
3648                                         catch (ModuleException& e)
3649                                         {
3650                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3651                                         }
3652                                 }
3653
3654                                 LinkBlocks.push_back(L);
3655                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3656                         }
3657                         else
3658                         {
3659                                 if (L.IPAddr == "")
3660                                 {
3661                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3662                                 }
3663                                 else if (L.RecvPass == "")
3664                                 {
3665                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3666                                 }
3667                                 else if (L.SendPass == "")
3668                                 {
3669                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3670                                 }
3671                                 else if (L.Name == "")
3672                                 {
3673                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3674                                 }
3675                                 else if (!L.Port)
3676                                 {
3677                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3678                                 }
3679                         }
3680                 }
3681                 else
3682                 {
3683                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3684                 }
3685         }
3686         DELETE(Conf);
3687 }
3688
3689
3690 class ModuleSpanningTree : public Module
3691 {
3692         std::vector<TreeSocket*> Bindings;
3693         int line;
3694         int NumServers;
3695         unsigned int max_local;
3696         unsigned int max_global;
3697         cmd_rconnect* command_rconnect;
3698
3699  public:
3700
3701         ModuleSpanningTree(InspIRCd* Me)
3702                 : Module::Module(Me), max_local(0), max_global(0)
3703         {
3704
3705                 Bindings.clear();
3706
3707                 ::ServerInstance = Me;
3708
3709                 // Create the root of the tree
3710                 TreeRoot = new TreeServer(ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3711
3712                 ReadConfiguration(true);
3713
3714                 command_rconnect = new cmd_rconnect(ServerInstance, this);
3715                 ServerInstance->AddCommand(command_rconnect);
3716         }
3717
3718         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3719         {
3720                 std::string Parent = TreeRoot->GetName();
3721                 if (Current->GetParent())
3722                 {
3723                         Parent = Current->GetParent()->GetName();
3724                 }
3725                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3726                 {
3727                         if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3728                         {
3729                                 if (*user->oper)
3730                                 {
3731                                          ShowLinks(Current->GetChild(q),user,hops+1);
3732                                 }
3733                         }
3734                         else
3735                         {
3736                                 ShowLinks(Current->GetChild(q),user,hops+1);
3737                         }
3738                 }
3739                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3740                 if ((HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3741                         return;
3742                 user->WriteServ("364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),(FlatLinks && (!*user->oper)) ? ServerInstance->Config->ServerName : Parent.c_str(),(FlatLinks && (!*user->oper)) ? 0 : hops,Current->GetDesc().c_str());
3743         }
3744
3745         int CountLocalServs()
3746         {
3747                 return TreeRoot->ChildCount();
3748         }
3749
3750         int CountServs()
3751         {
3752                 return serverlist.size();
3753         }
3754
3755         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3756         {
3757                 ShowLinks(TreeRoot,user,0);
3758                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3759                 return;
3760         }
3761
3762         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3763         {
3764                 unsigned int n_users = ServerInstance->UserCount();
3765
3766                 /* Only update these when someone wants to see them, more efficient */
3767                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3768                         max_local = ServerInstance->LocalUserCount();
3769                 if (n_users > max_global)
3770                         max_global = n_users;
3771
3772                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3773                 if (ServerInstance->OperCount())
3774                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3775                 if (ServerInstance->UnregisteredUserCount())
3776                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3777                 if (ServerInstance->ChannelCount())
3778                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3779                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3780                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3781                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3782                 return;
3783         }
3784
3785         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3786
3787         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3788         {
3789                 if (line < 128)
3790                 {
3791                         for (int t = 0; t < depth; t++)
3792                         {
3793                                 matrix[line][t] = ' ';
3794                         }
3795
3796                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3797                         // a 'Spacer' String to compensate.
3798                         char spacer[40];
3799
3800                         memset(spacer,' ',40);
3801                         if ((40 - Current->GetName().length() - depth) > 1) {
3802                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3803                         }
3804                         else
3805                         {
3806                                 spacer[5] = '\0';
3807                         }
3808
3809                         float percent;
3810                         char text[80];
3811                         if (ServerInstance->clientlist.size() == 0) {
3812                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3813                                 percent = 0;
3814                         }
3815                         else
3816                         {
3817                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3818                         }
3819                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3820                         totusers += Current->GetUserCount();
3821                         totservers++;
3822                         strlcpy(&matrix[line][depth],text,80);
3823                         line++;
3824                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3825                         {
3826                                 if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3827                                 {
3828                                         if (*user->oper)
3829                                         {
3830                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3831                                         }
3832                                 }
3833                                 else
3834                                 {
3835                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3836                                 }
3837                         }
3838                 }
3839         }
3840
3841         int HandleMotd(const char** parameters, int pcnt, userrec* user)
3842         {
3843                 if (pcnt > 0)
3844                 {
3845                         /* Remote MOTD, the server is within the 1st parameter */
3846                         std::deque<std::string> params;
3847                         params.push_back(parameters[0]);
3848
3849                         /* Send it out remotely, generate no reply yet */
3850                         TreeServer* s = FindServerMask(parameters[0]);
3851                         if (s)
3852                         {
3853                                 DoOneToOne(user->nick, "MOTD", params, s->GetName());
3854                         }
3855                         else
3856                         {
3857                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3858                         }
3859                         return 1;
3860                 }
3861                 return 0;
3862         }
3863
3864         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
3865         {
3866                 if (pcnt > 0)
3867                 {
3868                         /* Remote ADMIN, the server is within the 1st parameter */
3869                         std::deque<std::string> params;
3870                         params.push_back(parameters[0]);
3871
3872                         /* Send it out remotely, generate no reply yet */
3873                         TreeServer* s = FindServerMask(parameters[0]);
3874                         if (s)
3875                         {
3876                                 DoOneToOne(user->nick, "ADMIN", params, s->GetName());
3877                         }
3878                         else
3879                         {
3880                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3881                         }
3882                         return 1;
3883                 }
3884                 return 0;
3885         }
3886
3887         int HandleStats(const char** parameters, int pcnt, userrec* user)
3888         {
3889                 if (pcnt > 1)
3890                 {
3891                         /* Remote STATS, the server is within the 2nd parameter */
3892                         std::deque<std::string> params;
3893                         params.push_back(parameters[0]);
3894                         params.push_back(parameters[1]);
3895                         /* Send it out remotely, generate no reply yet */
3896                         TreeServer* s = FindServerMask(parameters[1]);
3897                         if (s)
3898                         {
3899                                 params[1] = s->GetName();
3900                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
3901                         }
3902                         else
3903                         {
3904                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3905                         }
3906                         return 1;
3907                 }
3908                 return 0;
3909         }
3910
3911         // Ok, prepare to be confused.
3912         // After much mulling over how to approach this, it struck me that
3913         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3914         // keeping track of a ton of ascii characters, and line by line
3915         // under recursion working out where to place them using multiplications
3916         // and divisons, we instead render the map onto a backplane of characters
3917         // (a character matrix), then draw the branches as a series of "L" shapes
3918         // from the nodes. This is not only friendlier on CPU it uses less stack.
3919
3920         void HandleMap(const char** parameters, int pcnt, userrec* user)
3921         {
3922                 // This array represents a virtual screen which we will
3923                 // "scratch" draw to, as the console device of an irc
3924                 // client does not provide for a proper terminal.
3925                 float totusers = 0;
3926                 float totservers = 0;
3927                 char matrix[128][80];
3928                 for (unsigned int t = 0; t < 128; t++)
3929                 {
3930                         matrix[t][0] = '\0';
3931                 }
3932                 line = 0;
3933                 // The only recursive bit is called here.
3934                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3935                 // Process each line one by one. The algorithm has a limit of
3936                 // 128 servers (which is far more than a spanning tree should have
3937                 // anyway, so we're ok). This limit can be raised simply by making
3938                 // the character matrix deeper, 128 rows taking 10k of memory.
3939                 for (int l = 1; l < line; l++)
3940                 {
3941                         // scan across the line looking for the start of the
3942                         // servername (the recursive part of the algorithm has placed
3943                         // the servers at indented positions depending on what they
3944                         // are related to)
3945                         int first_nonspace = 0;
3946                         while (matrix[l][first_nonspace] == ' ')
3947                         {
3948                                 first_nonspace++;
3949                         }
3950                         first_nonspace--;
3951                         // Draw the `- (corner) section: this may be overwritten by
3952                         // another L shape passing along the same vertical pane, becoming
3953                         // a |- (branch) section instead.
3954                         matrix[l][first_nonspace] = '-';
3955                         matrix[l][first_nonspace-1] = '`';
3956                         int l2 = l - 1;
3957                         // Draw upwards until we hit the parent server, causing possibly
3958                         // other corners (`-) to become branches (|-)
3959                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3960                         {
3961                                 matrix[l2][first_nonspace-1] = '|';
3962                                 l2--;
3963                         }
3964                 }
3965                 // dump the whole lot to the user. This is the easy bit, honest.
3966                 for (int t = 0; t < line; t++)
3967                 {
3968                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
3969                 }
3970                 float avg_users = totusers / totservers;
3971                 user->WriteServ("270 %s :%.0f server%s and %.0f user%s, average %.2f users per server",user->nick,totservers,(totservers > 1 ? "s" : ""),totusers,(totusers > 1 ? "s" : ""),avg_users);
3972         user->WriteServ("007 %s :End of /MAP",user->nick);
3973                 return;
3974         }
3975
3976         int HandleSquit(const char** parameters, int pcnt, userrec* user)
3977         {
3978                 TreeServer* s = FindServerMask(parameters[0]);
3979                 if (s)
3980                 {
3981                         if (s == TreeRoot)
3982                         {
3983                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
3984                                 return 1;
3985                         }
3986                         TreeSocket* sock = s->GetSocket();
3987                         if (sock)
3988                         {
3989                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
3990                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
3991                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
3992                                 ServerInstance->SE->DelFd(sock);
3993                                 sock->Close();
3994                                 delete sock;
3995                         }
3996                         else
3997                         {
3998                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
3999                         }
4000                 }
4001                 else
4002                 {
4003                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4004                 }
4005                 return 1;
4006         }
4007
4008         int HandleTime(const char** parameters, int pcnt, userrec* user)
4009         {
4010                 if ((IS_LOCAL(user)) && (pcnt))
4011                 {
4012                         TreeServer* found = FindServerMask(parameters[0]);
4013                         if (found)
4014                         {
4015                                 // we dont' override for local server
4016                                 if (found == TreeRoot)
4017                                         return 0;
4018
4019                                 std::deque<std::string> params;
4020                                 params.push_back(found->GetName());
4021                                 params.push_back(user->nick);
4022                                 DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4023                         }
4024                         else
4025                         {
4026                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4027                         }
4028                 }
4029                 return 1;
4030         }
4031
4032         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4033         {
4034                 if ((IS_LOCAL(user)) && (pcnt > 1))
4035                 {
4036                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4037                         if ((remote) && (remote->GetFd() < 0))
4038                         {
4039                                 std::deque<std::string> params;
4040                                 params.push_back(parameters[1]);
4041                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
4042                                 return 1;
4043                         }
4044                         else if (!remote)
4045                         {
4046                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4047                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4048                                 return 1;
4049                         }
4050                 }
4051                 return 0;
4052         }
4053
4054         void DoPingChecks(time_t curtime)
4055         {
4056                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
4057                 {
4058                         TreeServer* serv = TreeRoot->GetChild(j);
4059                         TreeSocket* sock = serv->GetSocket();
4060                         if (sock)
4061                         {
4062                                 if (curtime >= serv->NextPingTime())
4063                                 {
4064                                         if (serv->AnsweredLastPing())
4065                                         {
4066                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4067                                                 serv->SetNextPingTime(curtime + 60);
4068                                         }
4069                                         else
4070                                         {
4071                                                 // they didnt answer, boot them
4072                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4073                                                 sock->Squit(serv,"Ping timeout");
4074                                                 ServerInstance->SE->DelFd(sock);
4075                                                 sock->Close();
4076                                                 delete sock;
4077                                                 return;
4078                                         }
4079                                 }
4080                         }
4081                 }
4082         }
4083
4084         void ConnectServer(Link* x)
4085         {
4086                 insp_inaddr binip;
4087
4088                 /* Do we already have an IP? If so, no need to resolve it. */
4089                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4090                 {
4091                         TreeSocket* newsocket = new TreeSocket(ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4092                         if (newsocket->GetFd() > -1)
4093                         {
4094                                 /* Handled automatically on success */
4095                         }
4096                         else
4097                         {
4098                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4099                                 delete newsocket;
4100                                 this->DoFailOver(x);
4101                         }
4102                 }
4103                 else
4104                 {
4105                         try
4106                         {
4107                                 ServernameResolver* snr = new ServernameResolver(ServerInstance,x->IPAddr, *x);
4108                                 ServerInstance->AddResolver(snr);
4109                         }
4110                         catch (ModuleException& e)
4111                         {
4112                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4113                                 this->DoFailOver(x);
4114                         }
4115                 }
4116         }
4117
4118         void DoFailOver(Link* x)
4119         {
4120                 if (x->FailOver.length())
4121                 {
4122                         if (x->FailOver == x->Name)
4123                         {
4124                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Some muppet configured the failover for server \002%s\002 to point at itself. Not following it!", x->Name.c_str());
4125                                 return;
4126                         }
4127                         Link* TryThisOne = this->FindLink(x->FailOver.c_str());
4128                         if (TryThisOne)
4129                         {
4130                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
4131                                 ConnectServer(TryThisOne);
4132                         }
4133                         else
4134                         {
4135                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
4136                         }
4137                 }
4138         }
4139
4140         Link* FindLink(const std::string& name)
4141         {
4142                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4143                 {
4144                         if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
4145                         {
4146                                 return &(*x);
4147                         }
4148                 }
4149                 return NULL;
4150         }
4151
4152         void AutoConnectServers(time_t curtime)
4153         {
4154                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4155                 {
4156                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4157                         {
4158                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4159                                 x->NextConnectTime = curtime + x->AutoConnect;
4160                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4161                                 if (x->FailOver.length())
4162                                 {
4163                                         TreeServer* CheckFailOver = FindServer(x->FailOver.c_str());
4164                                         if (CheckFailOver)
4165                                         {
4166                                                 /* The failover for this server is currently a member of the network.
4167                                                  * The failover probably succeeded, where the main link did not.
4168                                                  * Don't try the main link until the failover is gone again.
4169                                                  */
4170                                                 continue;
4171                                         }
4172                                 }
4173                                 if (!CheckDupe)
4174                                 {
4175                                         // an autoconnected server is not connected. Check if its time to connect it
4176                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4177                                         this->ConnectServer(&(*x));
4178                                 }
4179                         }
4180                 }
4181         }
4182
4183         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4184         {
4185                 // we've already checked if pcnt > 0, so this is safe
4186                 TreeServer* found = FindServerMask(parameters[0]);
4187                 if (found)
4188                 {
4189                         std::string Version = found->GetVersion();
4190                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4191                         if (found == TreeRoot)
4192                         {
4193                                 std::stringstream out(ServerInstance->Config->data005);
4194                                 std::string token = "";
4195                                 std::string line5 = "";
4196                                 int token_counter = 0;
4197
4198                                 while (!out.eof())
4199                                 {
4200                                         out >> token;
4201                                         line5 = line5 + token + " ";
4202                                         token_counter++;
4203
4204                                         if ((token_counter >= 13) || (out.eof() == true))
4205                                         {
4206                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4207                                                 line5 = "";
4208                                                 token_counter = 0;
4209                                         }
4210                                 }
4211                         }
4212                 }
4213                 else
4214                 {
4215                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4216                 }
4217                 return 1;
4218         }
4219
4220         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4221         {
4222                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4223                 {
4224                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4225                         {
4226                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4227                                 if (!CheckDupe)
4228                                 {
4229                                         user->WriteServ("NOTICE %s :*** CONNECT: Connecting to server: \002%s\002 (%s:%d)",user->nick,x->Name.c_str(),(x->HiddenFromStats ? "<hidden>" : x->IPAddr.c_str()),x->Port);
4230                                         ConnectServer(&(*x));
4231                                         return 1;
4232                                 }
4233                                 else
4234                                 {
4235                                         user->WriteServ("NOTICE %s :*** CONNECT: Server \002%s\002 already exists on the network and is connected via \002%s\002",user->nick,x->Name.c_str(),CheckDupe->GetParent()->GetName().c_str());
4236                                         return 1;
4237                                 }
4238                         }
4239                 }
4240                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4241                 return 1;
4242         }
4243
4244         virtual int OnStats(char statschar, userrec* user, string_list &results)
4245         {
4246                 if (statschar == 'c')
4247                 {
4248                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
4249                         {
4250                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 213 "+user->nick+" C *@"+(LinkBlocks[i].HiddenFromStats ? "<hidden>" : LinkBlocks[i].IPAddr)+" * "+LinkBlocks[i].Name.c_str()+" "+ConvToStr(LinkBlocks[i].Port)+" "+(LinkBlocks[i].EncryptionKey != "" ? 'e' : '-')+(LinkBlocks[i].AutoConnect ? 'a' : '-')+'s');
4251                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
4252                         }
4253                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4254                         ServerInstance->SNO->WriteToSnoMask('t',"Notice: %s '%c' requested by %s (%s@%s)",(!strcmp(user->server,ServerInstance->Config->ServerName) ? "Stats" : "Remote stats"),statschar,user->nick,user->ident,user->host);
4255                         return 1;
4256                 }
4257                 return 0;
4258         }
4259
4260         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4261         {
4262                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4263                 if (!validated)
4264                         return 0;
4265
4266                 if (command == "CONNECT")
4267                 {
4268                         return this->HandleConnect(parameters,pcnt,user);
4269                 }
4270                 else if (command == "STATS")
4271                 {
4272                         return this->HandleStats(parameters,pcnt,user);
4273                 }
4274                 else if (command == "MOTD")
4275                 {
4276                         return this->HandleMotd(parameters,pcnt,user);
4277                 }
4278                 else if (command == "ADMIN")
4279                 {
4280                         return this->HandleAdmin(parameters,pcnt,user);
4281                 }
4282                 else if (command == "SQUIT")
4283                 {
4284                         return this->HandleSquit(parameters,pcnt,user);
4285                 }
4286                 else if (command == "MAP")
4287                 {
4288                         this->HandleMap(parameters,pcnt,user);
4289                         return 1;
4290                 }
4291                 else if ((command == "TIME") && (pcnt > 0))
4292                 {
4293                         return this->HandleTime(parameters,pcnt,user);
4294                 }
4295                 else if (command == "LUSERS")
4296                 {
4297                         this->HandleLusers(parameters,pcnt,user);
4298                         return 1;
4299                 }
4300                 else if (command == "LINKS")
4301                 {
4302                         this->HandleLinks(parameters,pcnt,user);
4303                         return 1;
4304                 }
4305                 else if (command == "WHOIS")
4306                 {
4307                         if (pcnt > 1)
4308                         {
4309                                 // remote whois
4310                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4311                         }
4312                 }
4313                 else if ((command == "VERSION") && (pcnt > 0))
4314                 {
4315                         this->HandleVersion(parameters,pcnt,user);
4316                         return 1;
4317                 }
4318
4319                 return 0;
4320         }
4321
4322         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4323         {
4324                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4325                 {
4326                         // this bit of code cleverly routes all module commands
4327                         // to all remote severs *automatically* so that modules
4328                         // can just handle commands locally, without having
4329                         // to have any special provision in place for remote
4330                         // commands and linking protocols.
4331                         std::deque<std::string> params;
4332                         params.clear();
4333                         for (int j = 0; j < pcnt; j++)
4334                         {
4335                                 if (strchr(parameters[j],' '))
4336                                 {
4337                                         params.push_back(":" + std::string(parameters[j]));
4338                                 }
4339                                 else
4340                                 {
4341                                         params.push_back(std::string(parameters[j]));
4342                                 }
4343                         }
4344                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4345                         DoOneToMany(user->nick,command,params);
4346                 }
4347         }
4348
4349         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4350         {
4351                 TreeServer* s = FindServer(servername);
4352                 if (s)
4353                 {
4354                         description = s->GetDesc();
4355                 }
4356         }
4357
4358         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4359         {
4360                 if (IS_LOCAL(source))
4361                 {
4362                         std::deque<std::string> params;
4363                         params.push_back(dest->nick);
4364                         params.push_back(channel->name);
4365                         DoOneToMany(source->nick,"INVITE",params);
4366                 }
4367         }
4368
4369         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4370         {
4371                 std::deque<std::string> params;
4372                 params.push_back(chan->name);
4373                 params.push_back(":"+topic);
4374                 DoOneToMany(user->nick,"TOPIC",params);
4375         }
4376
4377         virtual void OnWallops(userrec* user, const std::string &text)
4378         {
4379                 if (IS_LOCAL(user))
4380                 {
4381                         std::deque<std::string> params;
4382                         params.push_back(":"+text);
4383                         DoOneToMany(user->nick,"WALLOPS",params);
4384                 }
4385         }
4386
4387         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4388         {
4389                 if (target_type == TYPE_USER)
4390                 {
4391                         userrec* d = (userrec*)dest;
4392                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4393                         {
4394                                 std::deque<std::string> params;
4395                                 params.clear();
4396                                 params.push_back(d->nick);
4397                                 params.push_back(":"+text);
4398                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4399                         }
4400                 }
4401                 else if (target_type == TYPE_CHANNEL)
4402                 {
4403                         if (IS_LOCAL(user))
4404                         {
4405                                 chanrec *c = (chanrec*)dest;
4406                                 if (c)
4407                                 {
4408                                         std::string cname = c->name;
4409                                         if (status)
4410                                                 cname = status + cname;
4411                                         std::deque<TreeServer*> list;
4412                                         GetListOfServersForChannel(c,list);
4413                                         unsigned int ucount = list.size();
4414                                         for (unsigned int i = 0; i < ucount; i++)
4415                                         {
4416                                                 TreeSocket* Sock = list[i]->GetSocket();
4417                                                 if (Sock)
4418                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4419                                         }
4420                                 }
4421                         }
4422                 }
4423                 else if (target_type == TYPE_SERVER)
4424                 {
4425                         if (IS_LOCAL(user))
4426                         {
4427                                 char* target = (char*)dest;
4428                                 std::deque<std::string> par;
4429                                 par.push_back(target);
4430                                 par.push_back(":"+text);
4431                                 DoOneToMany(user->nick,"NOTICE",par);
4432                         }
4433                 }
4434         }
4435
4436         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4437         {
4438                 if (target_type == TYPE_USER)
4439                 {
4440                         // route private messages which are targetted at clients only to the server
4441                         // which needs to receive them
4442                         userrec* d = (userrec*)dest;
4443                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4444                         {
4445                                 std::deque<std::string> params;
4446                                 params.clear();
4447                                 params.push_back(d->nick);
4448                                 params.push_back(":"+text);
4449                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4450                         }
4451                 }
4452                 else if (target_type == TYPE_CHANNEL)
4453                 {
4454                         if (IS_LOCAL(user))
4455                         {
4456                                 chanrec *c = (chanrec*)dest;
4457                                 if (c)
4458                                 {
4459                                         std::string cname = c->name;
4460                                         if (status)
4461                                                 cname = status + cname;
4462                                         std::deque<TreeServer*> list;
4463                                         GetListOfServersForChannel(c,list);
4464                                         unsigned int ucount = list.size();
4465                                         for (unsigned int i = 0; i < ucount; i++)
4466                                         {
4467                                                 TreeSocket* Sock = list[i]->GetSocket();
4468                                                 if (Sock)
4469                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4470                                         }
4471                                 }
4472                         }
4473                 }
4474                 else if (target_type == TYPE_SERVER)
4475                 {
4476                         if (IS_LOCAL(user))
4477                         {
4478                                 char* target = (char*)dest;
4479                                 std::deque<std::string> par;
4480                                 par.push_back(target);
4481                                 par.push_back(":"+text);
4482                                 DoOneToMany(user->nick,"PRIVMSG",par);
4483                         }
4484                 }
4485         }
4486
4487         virtual void OnBackgroundTimer(time_t curtime)
4488         {
4489                 AutoConnectServers(curtime);
4490                 DoPingChecks(curtime);
4491         }
4492
4493         virtual void OnUserJoin(userrec* user, chanrec* channel)
4494         {
4495                 // Only do this for local users
4496                 if (IS_LOCAL(user))
4497                 {
4498                         std::deque<std::string> params;
4499                         params.clear();
4500                         params.push_back(channel->name);
4501                         // set up their permissions and the channel TS with FJOIN.
4502                         // All users are FJOINed now, because a module may specify
4503                         // new joining permissions for the user.
4504                         params.clear();
4505                         params.push_back(channel->name);
4506                         params.push_back(ConvToStr(channel->age));
4507                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4508                         DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4509                 }
4510         }
4511
4512         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4513         {
4514                 // only occurs for local clients
4515                 if (user->registered != REG_ALL)
4516                         return;
4517                 std::deque<std::string> params;
4518                 params.push_back(newhost);
4519                 DoOneToMany(user->nick,"FHOST",params);
4520         }
4521
4522         virtual void OnChangeName(userrec* user, const std::string &gecos)
4523         {
4524                 // only occurs for local clients
4525                 if (user->registered != REG_ALL)
4526                         return;
4527                 std::deque<std::string> params;
4528                 params.push_back(gecos);
4529                 DoOneToMany(user->nick,"FNAME",params);
4530         }
4531
4532         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4533         {
4534                 if (IS_LOCAL(user))
4535                 {
4536                         std::deque<std::string> params;
4537                         params.push_back(channel->name);
4538                         if (partmessage != "")
4539                                 params.push_back(":"+partmessage);
4540                         DoOneToMany(user->nick,"PART",params);
4541                 }
4542         }
4543
4544         virtual void OnUserConnect(userrec* user)
4545         {
4546                 char agestr[MAXBUF];
4547                 if (IS_LOCAL(user))
4548                 {
4549                         std::deque<std::string> params;
4550                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4551                         params.push_back(agestr);
4552                         params.push_back(user->nick);
4553                         params.push_back(user->host);
4554                         params.push_back(user->dhost);
4555                         params.push_back(user->ident);
4556                         params.push_back("+"+std::string(user->FormatModes()));
4557                         params.push_back(user->GetIPString());
4558                         params.push_back(":"+std::string(user->fullname));
4559                         DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4560
4561                         // User is Local, change needs to be reflected!
4562                         TreeServer* SourceServer = FindServer(user->server);
4563                         if (SourceServer)
4564                         {
4565                                 SourceServer->AddUserCount();
4566                         }
4567
4568                 }
4569         }
4570
4571         virtual void OnUserQuit(userrec* user, const std::string &reason)
4572         {
4573                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4574                 {
4575                         std::deque<std::string> params;
4576                         params.push_back(":"+reason);
4577                         DoOneToMany(user->nick,"QUIT",params);
4578                 }
4579                 // Regardless, We need to modify the user Counts..
4580                 TreeServer* SourceServer = FindServer(user->server);
4581                 if (SourceServer)
4582                 {
4583                         SourceServer->DelUserCount();
4584                 }
4585
4586         }
4587
4588         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4589         {
4590                 if (IS_LOCAL(user))
4591                 {
4592                         std::deque<std::string> params;
4593                         params.push_back(user->nick);
4594                         DoOneToMany(oldnick,"NICK",params);
4595                 }
4596         }
4597
4598         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4599         {
4600                 if ((source) && (IS_LOCAL(source)))
4601                 {
4602                         std::deque<std::string> params;
4603                         params.push_back(chan->name);
4604                         params.push_back(user->nick);
4605                         params.push_back(":"+reason);
4606                         DoOneToMany(source->nick,"KICK",params);
4607                 }
4608                 else if (!source)
4609                 {
4610                         std::deque<std::string> params;
4611                         params.push_back(chan->name);
4612                         params.push_back(user->nick);
4613                         params.push_back(":"+reason);
4614                         DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4615                 }
4616         }
4617
4618         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4619         {
4620                 std::deque<std::string> params;
4621                 params.push_back(dest->nick);
4622                 params.push_back(":"+reason);
4623                 DoOneToMany(source->nick,"KILL",params);
4624         }
4625
4626         virtual void OnRehash(const std::string &parameter)
4627         {
4628                 if (parameter != "")
4629                 {
4630                         std::deque<std::string> params;
4631                         params.push_back(parameter);
4632                         DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4633                         // check for self
4634                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4635                         {
4636                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4637                                 ServerInstance->RehashServer();
4638                         }
4639                 }
4640                 ReadConfiguration(false);
4641         }
4642
4643         // note: the protocol does not allow direct umode +o except
4644         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4645         // locally.
4646         virtual void OnOper(userrec* user, const std::string &opertype)
4647         {
4648                 if (IS_LOCAL(user))
4649                 {
4650                         std::deque<std::string> params;
4651                         params.push_back(opertype);
4652                         DoOneToMany(user->nick,"OPERTYPE",params);
4653                 }
4654         }
4655
4656         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4657         {
4658                 if (IS_LOCAL(source))
4659                 {
4660                         char type[8];
4661                         snprintf(type,8,"%cLINE",linetype);
4662                         std::string stype = type;
4663                         if (adding)
4664                         {
4665                                 char sduration[MAXBUF];
4666                                 snprintf(sduration,MAXBUF,"%ld",duration);
4667                                 std::deque<std::string> params;
4668                                 params.push_back(host);
4669                                 params.push_back(sduration);
4670                                 params.push_back(":"+reason);
4671                                 DoOneToMany(source->nick,stype,params);
4672                         }
4673                         else
4674                         {
4675                                 std::deque<std::string> params;
4676                                 params.push_back(host);
4677                                 DoOneToMany(source->nick,stype,params);
4678                         }
4679                 }
4680         }
4681
4682         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4683         {
4684                 OnLine(source,hostmask,true,'G',duration,reason);
4685         }
4686
4687         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4688         {
4689                 OnLine(source,ipmask,true,'Z',duration,reason);
4690         }
4691
4692         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4693         {
4694                 OnLine(source,nickmask,true,'Q',duration,reason);
4695         }
4696
4697         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4698         {
4699                 OnLine(source,hostmask,true,'E',duration,reason);
4700         }
4701
4702         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4703         {
4704                 OnLine(source,hostmask,false,'G',0,"");
4705         }
4706
4707         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4708         {
4709                 OnLine(source,ipmask,false,'Z',0,"");
4710         }
4711
4712         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4713         {
4714                 OnLine(source,nickmask,false,'Q',0,"");
4715         }
4716
4717         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4718         {
4719                 OnLine(source,hostmask,false,'E',0,"");
4720         }
4721
4722         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4723         {
4724                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4725                 {
4726                         if (target_type == TYPE_USER)
4727                         {
4728                                 userrec* u = (userrec*)dest;
4729                                 std::deque<std::string> params;
4730                                 params.push_back(u->nick);
4731                                 params.push_back(text);
4732                                 DoOneToMany(user->nick,"MODE",params);
4733                         }
4734                         else
4735                         {
4736                                 chanrec* c = (chanrec*)dest;
4737                                 std::deque<std::string> params;
4738                                 params.push_back(c->name);
4739                                 params.push_back(text);
4740                                 DoOneToMany(user->nick,"MODE",params);
4741                         }
4742                 }
4743         }
4744
4745         virtual void OnSetAway(userrec* user)
4746         {
4747                 if (IS_LOCAL(user))
4748                 {
4749                         std::deque<std::string> params;
4750                         params.push_back(":"+std::string(user->awaymsg));
4751                         DoOneToMany(user->nick,"AWAY",params);
4752                 }
4753         }
4754
4755         virtual void OnCancelAway(userrec* user)
4756         {
4757                 if (IS_LOCAL(user))
4758                 {
4759                         std::deque<std::string> params;
4760                         params.clear();
4761                         DoOneToMany(user->nick,"AWAY",params);
4762                 }
4763         }
4764
4765         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4766         {
4767                 TreeSocket* s = (TreeSocket*)opaque;
4768                 if (target)
4769                 {
4770                         if (target_type == TYPE_USER)
4771                         {
4772                                 userrec* u = (userrec*)target;
4773                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4774                         }
4775                         else
4776                         {
4777                                 chanrec* c = (chanrec*)target;
4778                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4779                         }
4780                 }
4781         }
4782
4783         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4784         {
4785                 TreeSocket* s = (TreeSocket*)opaque;
4786                 if (target)
4787                 {
4788                         if (target_type == TYPE_USER)
4789                         {
4790                                 userrec* u = (userrec*)target;
4791                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4792                         }
4793                         else if (target_type == TYPE_OTHER)
4794                         {
4795                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4796                         }
4797                         else if (target_type == TYPE_CHANNEL)
4798                         {
4799                                 chanrec* c = (chanrec*)target;
4800                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4801                         }
4802                 }
4803         }
4804
4805         virtual void OnEvent(Event* event)
4806         {
4807                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4808
4809                 if (event->GetEventID() == "send_metadata")
4810                 {
4811                         if (params->size() < 3)
4812                                 return;
4813                         (*params)[2] = ":" + (*params)[2];
4814                         DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4815                 }
4816                 else if (event->GetEventID() == "send_topic")
4817                 {
4818                         if (params->size() < 2)
4819                                 return;
4820                         (*params)[1] = ":" + (*params)[1];
4821                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
4822                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time()));
4823                         DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
4824                 }
4825                 else if (event->GetEventID() == "send_mode")
4826                 {
4827                         if (params->size() < 2)
4828                                 return;
4829                         // Insert the TS value of the object, either userrec or chanrec
4830                         time_t ourTS = 0;
4831                         userrec* a = ServerInstance->FindNick((*params)[0]);
4832                         if (a)
4833                         {
4834                                 ourTS = a->age;
4835                         }
4836                         else
4837                         {
4838                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4839                                 if (a)
4840                                 {
4841                                         ourTS = a->age;
4842                                 }
4843                         }
4844                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4845                         DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4846                 }
4847         }
4848
4849         virtual ~ModuleSpanningTree()
4850         {
4851         }
4852
4853         virtual Version GetVersion()
4854         {
4855                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
4856         }
4857
4858         void Implements(char* List)
4859         {
4860                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
4861                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
4862                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
4863                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
4864                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
4865                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
4866                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
4867         }
4868
4869         /* It is IMPORTANT that m_spanningtree is the last module in the chain
4870          * so that any activity it sees is FINAL, e.g. we arent going to send out
4871          * a NICK message before m_cloaking has finished putting the +x on the user,
4872          * etc etc.
4873          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
4874          * the module call queue.
4875          */
4876         Priority Prioritize()
4877         {
4878                 return PRIORITY_LAST;
4879         }
4880 };
4881
4882 void DoFailOver(Link* x)
4883 {
4884         TreeProtocolModule->DoFailOver(x);
4885 }
4886
4887 Link* FindLink(const std::string& name)
4888 {
4889         return TreeProtocolModule->FindLink(name);
4890 }
4891
4892 class ModuleSpanningTreeFactory : public ModuleFactory
4893 {
4894  public:
4895         ModuleSpanningTreeFactory()
4896         {
4897         }
4898
4899         ~ModuleSpanningTreeFactory()
4900         {
4901         }
4902
4903         virtual Module * CreateModule(InspIRCd* Me)
4904         {
4905                 TreeProtocolModule = new ModuleSpanningTree(Me);
4906                 return TreeProtocolModule;
4907         }
4908
4909 };
4910
4911
4912 extern "C" void * init_module( void )
4913 {
4914         return new ModuleSpanningTreeFactory;
4915 }