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