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                                 DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1302                         }
1303
1304                         if (to_keep.length())
1305                         {
1306                                 unsigned int n = 2;
1307                                 unsigned int q = 0;
1308                                 modelist[0] = params[0].c_str();
1309                                 modelist[1] = to_keep.c_str();
1310
1311                                 if (params_to_keep.size() > 2)
1312                                 {
1313                                         for (q = 2; (q < params_to_keep.size()) && (q < 64); q++)
1314                                         {
1315                                                 ServerInstance->Log(DEBUG,"Item %d of %d", q, params_to_keep.size());
1316                                                 modelist[n++] = params_to_keep[q].c_str();
1317                                         }
1318                                 }
1319
1320                                 if (smode)
1321                                 {
1322                                         ServerInstance->Log(DEBUG,"Send mode");
1323                                         this->Instance->SendMode(modelist, n+2, who);
1324                                 }
1325                                 else
1326                                 {
1327                                         ServerInstance->Log(DEBUG,"Send mode client");
1328                                         this->Instance->CallCommandHandler("MODE", modelist, n+2, who);
1329                                 }
1330
1331                                 /* HOT POTATO! PASS IT ON! */
1332                                 DoOneToAllButSender(source,"FMODE",params,sourceserv);
1333                         }
1334                 }
1335                 else
1336                 /* U-lined servers always win regardless of their TS */
1337                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1338                 {
1339                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1340                          * SHOULD accept it, if its clock is right.
1341                          *
1342                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1343                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1344                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1345                          *
1346                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1347                          * writing the code. It took me a while to come up with this solution.
1348                          *
1349                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1350                          */
1351
1352                         std::deque<std::string> newparams;      /* New parameter list we send back */
1353                         newparams.push_back(params[0]);         /* Target, user or channel */
1354                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1355                         newparams.push_back("");                /* This contains the mode string. For now
1356                                                                  * it's empty, we fill it below.
1357                                                                  */
1358
1359                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1360                          * set to avoid a desync here.
1361                          */
1362                         std::string modebounce = "";
1363                         bool adding = true;
1364                         unsigned int t = 3;
1365                         ModeHandler* mh = NULL;
1366                         char cur_change = 1;
1367                         char old_change = 0;
1368                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1369                         {
1370                                 /* Iterate over all mode chars in the sent set */
1371                                 switch (*x)
1372                                 {
1373                                         /* Adding or subtracting modes? */
1374                                         case '-':
1375                                                 adding = false;
1376                                         break;
1377                                         case '+':
1378                                                 adding = true;
1379                                         break;
1380                                         default:
1381                                                 /* Find the mode handler for this mode */
1382                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1383
1384                                                 /* Got a mode handler?
1385                                                  * This also prevents us bouncing modes we have no handler for.
1386                                                  */
1387                                                 if (mh)
1388                                                 {
1389                                                         ModePair ret;
1390                                                         std::string p = "";
1391
1392                                                         /* Does the mode require a parameter right now?
1393                                                          * If it does, fetch it if we can
1394                                                          */
1395                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1396                                                                 p = params[t++];
1397
1398                                                         /* Call the ModeSet method to determine if its set with the
1399                                                          * given parameter here or not.
1400                                                          */
1401                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1402
1403                                                         /* XXX: Really. Dont ask.
1404                                                          * Determine from if its set combined with what the current
1405                                                          * 'state' is (adding or not) as to wether we should 'invert'
1406                                                          * or 'reinforce' the mode change
1407                                                          */
1408                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1409
1410                                                         /* Quickly determine if we have 'flipped' from + to -,
1411                                                          * or - to +, to prevent unneccessary +/- chars in the
1412                                                          * output string that waste bandwidth
1413                                                          */
1414                                                         if (cur_change != old_change)
1415                                                                 modebounce += cur_change;
1416                                                         old_change = cur_change;
1417
1418                                                         /* Add the mode character to the output string */
1419                                                         modebounce += mh->GetModeChar();
1420
1421                                                         /* We got a parameter back from ModeHandler::ModeSet,
1422                                                          * are we supposed to be sending one out right now?
1423                                                          */
1424                                                         if (ret.second.length())
1425                                                         {
1426                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1427                                                                         /* Yes we're supposed to be sending out
1428                                                                          * the parameter. Make sure it goes
1429                                                                          */
1430                                                                         newparams.push_back(ret.second);
1431                                                         }
1432
1433                                                 }
1434                                         break;
1435                                 }
1436                         }
1437
1438                         /* Update the parameters for FMODE with the new 'bounced' string */
1439                         newparams[2] = modebounce;
1440                         /* Only send it back the way it came, no need to send it anywhere else */
1441                         DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1442                         ServerInstance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1443                 }
1444                 else
1445                 {
1446                         ServerInstance->Log(DEBUG,"Allow modes, TS lower for sender");
1447                         /* The server was ulined, but something iffy is up with the TS.
1448                          * Sound the alarm bells!
1449                          */
1450                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1451                         {
1452                                 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());
1453                         }
1454                         /* Allow the mode, route it to either server or user command handling */
1455                         if (smode)
1456                                 this->Instance->SendMode(modelist,n,who);
1457                         else
1458                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1459
1460                         /* HOT POTATO! PASS IT ON! */
1461                         DoOneToAllButSender(source,"FMODE",params,sourceserv);
1462                 }
1463                 /* Are we supposed to free the userrec? */
1464                 if (smode)
1465                         DELETE(who);
1466
1467                 return true;
1468         }
1469
1470         /* FTOPIC command */
1471         bool ForceTopic(std::string source, std::deque<std::string> &params)
1472         {
1473                 if (params.size() != 4)
1474                         return true;
1475                 time_t ts = atoi(params[1].c_str());
1476                 std::string nsource = source;
1477
1478                 chanrec* c = this->Instance->FindChan(params[0]);
1479                 if (c)
1480                 {
1481                         if ((ts >= c->topicset) || (!*c->topic))
1482                         {
1483                                 std::string oldtopic = c->topic;
1484                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1485                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1486                                 c->topicset = ts;
1487                                 /* if the topic text is the same as the current topic,
1488                                  * dont bother to send the TOPIC command out, just silently
1489                                  * update the set time and set nick.
1490                                  */
1491                                 if (oldtopic != params[3])
1492                                 {
1493                                         userrec* user = this->Instance->FindNick(source);
1494                                         if (!user)
1495                                         {
1496                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1497                                         }
1498                                         else
1499                                         {
1500                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1501                                                 nsource = user->server;
1502                                         }
1503                                         /* all done, send it on its way */
1504                                         params[3] = ":" + params[3];
1505                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
1506                                 }
1507                         }
1508
1509                 }
1510
1511                 return true;
1512         }
1513
1514         /* FJOIN, similar to unreal SJOIN */
1515         bool ForceJoin(std::string source, std::deque<std::string> &params)
1516         {
1517                 if (params.size() < 3)
1518                         return true;
1519
1520                 char first[MAXBUF];
1521                 char modestring[MAXBUF];
1522                 char* mode_users[127];
1523                 memset(&mode_users,0,sizeof(mode_users));
1524                 mode_users[0] = first;
1525                 mode_users[1] = modestring;
1526                 strcpy(modestring,"+");
1527                 unsigned int modectr = 2;
1528
1529                 userrec* who = NULL;
1530                 std::string channel = params[0];
1531                 time_t TS = atoi(params[1].c_str());
1532                 char* key = "";
1533
1534                 chanrec* chan = this->Instance->FindChan(channel);
1535                 if (chan)
1536                 {
1537                         key = chan->key;
1538                 }
1539                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1540
1541                 /* default is a high value, which if we dont have this
1542                  * channel will let the other side apply their modes.
1543                  */
1544                 time_t ourTS = time(NULL)+600;
1545                 chanrec* us = this->Instance->FindChan(channel);
1546                 if (us)
1547                 {
1548                         ourTS = us->age;
1549                 }
1550
1551                 ServerInstance->Log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
1552
1553                 irc::tokenstream users(params[2]);
1554                 std::string item = "*";
1555
1556                 /* do this first, so our mode reversals are correctly received by other servers
1557                  * if there is a TS collision.
1558                  */
1559                 params[2] = ":" + params[2];
1560                 DoOneToAllButSender(source,"FJOIN",params,source);
1561                 while (item != "")
1562                 {
1563                         item = users.GetToken();
1564                         /* process one user at a time, applying modes. */
1565                         char* usr = (char*)item.c_str();
1566                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1567                          * (is this even possible?) */
1568                         if (usr && *usr)
1569                         {
1570                                 char* permissions = usr;
1571                                 int ntimes = 0;
1572                                 while ((*permissions) && (*permissions != ','))
1573                                 {
1574                                         ModeHandler* mh = ServerInstance->Modes->FindPrefix(*permissions);
1575                                         if (mh)
1576                                         {
1577                                                 ntimes++;
1578                                                 charlcat(modestring,mh->GetModeChar(),MAXBUF);
1579                                         }
1580                                         else
1581                                         {
1582                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",mh->GetPrefix());
1583                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+mh->GetModeChar()+"' in FJOIN");
1584                                                 return false;
1585                                         }
1586                                         usr++;
1587                                         permissions++;
1588                                 }
1589                                 usr++;
1590
1591                                 /* Did they get any modes? How many times? */
1592                                 for (int k = 0; k < ntimes; k++)
1593                                         mode_users[modectr++] = strdup(usr); // XXX
1594
1595                                 who = this->Instance->FindNick(usr);
1596                                 if (who)
1597                                 {
1598                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, key);
1599                                         if (modectr >= (MAXMODES-1))
1600                                         {
1601                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1602                                                  * if there are more than MAXMODES to go.
1603                                                  */
1604                                                 if ((ourTS >= TS) || (this->Instance->ULine(who->server)))
1605                                                 {
1606                                                         /* We also always let u-lined clients win, no matter what the TS value */
1607                                                         ServerInstance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1608                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1609                                                         if (ourTS != TS)
1610                                                         {
1611                                                                 ServerInstance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1612                                                                 us->age = TS;
1613                                                                 ourTS = TS;
1614                                                         }
1615                                                 }
1616                                                 else
1617                                                 {
1618                                                         ServerInstance->Log(DEBUG,"Their channel newer than ours, bouncing their modes");
1619                                                         /* bouncy bouncy! */
1620                                                         std::deque<std::string> params;
1621                                                         /* modes are now being UNSET... */
1622                                                         *mode_users[1] = '-';
1623                                                         for (unsigned int x = 0; x < modectr; x++)
1624                                                         {
1625                                                                 if (x == 1)
1626                                                                 {
1627                                                                         params.push_back(ConvToStr(us->age));
1628                                                                 }
1629                                                                 params.push_back(mode_users[x]);
1630
1631                                                         }
1632                                                         // tell everyone to bounce the modes. bad modes, bad!
1633                                                         DoOneToMany(this->Instance->Config->ServerName,"FMODE",params);
1634                                                 }
1635                                                 strcpy(mode_users[1],"+");
1636                                                 for (unsigned int f = 2; f < modectr; f++)
1637                                                         free(mode_users[f]);
1638                                                 modectr = 2;
1639                                         }
1640                                 }
1641                                 else
1642                                 {
1643                                         ServerInstance->Log(SPARSE,"Warning! Invalid user %s in FJOIN to channel %s IGNORED", who->nick, channel.c_str());
1644                                         continue;
1645                                 }
1646                         }
1647                 }
1648                 /* there werent enough modes built up to flush it during FJOIN,
1649                  * or, there are a number left over. flush them out.
1650                  */
1651                 if ((modectr > 2) && (who) && (us))
1652                 {
1653                         if (ourTS >= TS)
1654                         {
1655                                 ServerInstance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1656                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1657                                 if (ourTS != TS)
1658                                 {
1659                                         ServerInstance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1660                                         us->age = TS;
1661                                         ourTS = TS;
1662                                 }
1663                         }
1664                         else
1665                         {
1666                                 ServerInstance->Log(DEBUG,"Their channel newer than ours, bouncing their modes");
1667                                 std::deque<std::string> params;
1668                                 *mode_users[1] = '-';
1669                                 for (unsigned int x = 0; x < modectr; x++)
1670                                 {
1671                                         if (x == 1)
1672                                         {
1673                                                 params.push_back(ConvToStr(us->age));
1674                                         }
1675                                         params.push_back(mode_users[x]);
1676                                 }
1677                                 DoOneToMany(this->Instance->Config->ServerName,"FMODE",params);
1678                         }
1679
1680                         for (unsigned int f = 2; f < modectr; f++)
1681                                 free(mode_users[f]);
1682                 }
1683                 return true;
1684         }
1685
1686         /* NICK command */
1687         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1688         {
1689                 if (params.size() < 8)
1690                         return true;
1691                 if (params.size() > 8)
1692                 {
1693                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1694                         return true;
1695                 }
1696                 // NICK age nick host dhost ident +modes ip :gecos
1697                 //       0    1   2     3     4      5   6     7
1698                 time_t age = atoi(params[0].c_str());
1699
1700                 /* This used to have a pretty craq'y loop doing the same thing,
1701                  * now we just let the STL do the hard work (more efficiently)
1702                  */
1703                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1704                 if (pos_after_plus != std::string::npos)
1705                         params[5] = params[5].substr(pos_after_plus);
1706
1707                 const char* tempnick = params[1].c_str();
1708                 ServerInstance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1709
1710                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1711
1712                 if (iter != this->Instance->clientlist.end())
1713                 {
1714                         // nick collision
1715                         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);
1716                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1717                         return true;
1718                 }
1719
1720                 userrec* _new = new userrec(this->Instance);
1721                 this->Instance->clientlist[tempnick] = _new;
1722                 _new->SetFd(FD_MAGIC_NUMBER);
1723                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1724                 strlcpy(_new->host, params[2].c_str(),63);
1725                 strlcpy(_new->dhost, params[3].c_str(),63);
1726                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1727                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1728                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1729                 _new->registered = REG_ALL;
1730                 _new->signon = age;
1731
1732                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1733                         _new->modes[(*v)-65] = 1;
1734
1735 #ifdef SUPPORT_IP6LINKS
1736                 if (params[6].find_first_of(":") != std::string::npos)
1737                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1738                 else
1739 #endif
1740                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1741
1742                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1743
1744                 params[7] = ":" + params[7];
1745                 DoOneToAllButSender(source,"NICK",params,source);
1746
1747                 // Increment the Source Servers User Count..
1748                 TreeServer* SourceServer = FindServer(source);
1749                 if (SourceServer)
1750                 {
1751                         ServerInstance->Log(DEBUG,"Found source server of %s",_new->nick);
1752                         SourceServer->AddUserCount();
1753                 }
1754
1755                 return true;
1756         }
1757
1758         /* Send one or more FJOINs for a channel of users.
1759          * If the length of a single line is more than 480-NICKMAX
1760          * in length, it is split over multiple lines.
1761          */
1762         void SendFJoins(TreeServer* Current, chanrec* c)
1763         {
1764                 ServerInstance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1765                 char list[MAXBUF];
1766                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1767
1768                 size_t dlen, curlen;
1769                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1770                 int numusers = 0;
1771                 char* ptr = list + dlen;
1772
1773                 CUList *ulist = c->GetUsers();
1774                 std::vector<userrec*> specific_halfop;
1775                 std::vector<userrec*> specific_voice;
1776                 std::string modes = "";
1777                 std::string params = "";
1778
1779                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1780                 {
1781                         // The first parameter gets a : before it
1782                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1783
1784                         curlen += ptrlen;
1785                         ptr += ptrlen;
1786
1787                         numusers++;
1788
1789                         if (curlen > (480-NICKMAX))
1790                         {
1791                                 this->WriteLine(list);
1792                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1793                                 ptr = list + dlen;
1794                                 ptrlen = 0;
1795                                 numusers = 0;
1796                         }
1797                 }
1798
1799                 if (numusers)
1800                         this->WriteLine(list);
1801
1802                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1803                 {
1804                         modes.append("b");
1805                         params.append(b->data).append(" ");
1806                 }
1807                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1808         }
1809
1810         /* Send G, Q, Z and E lines */
1811         void SendXLines(TreeServer* Current)
1812         {
1813                 char data[MAXBUF];
1814                 std::string n = this->Instance->Config->ServerName;
1815                 const char* sn = n.c_str();
1816                 int iterations = 0;
1817                 /* Yes, these arent too nice looking, but they get the job done */
1818                 for (std::vector<ZLine>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1819                 {
1820                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,i->ipaddr,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1821                         this->WriteLine(data);
1822                 }
1823                 for (std::vector<QLine>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1824                 {
1825                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,i->nick,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1826                         this->WriteLine(data);
1827                 }
1828                 for (std::vector<GLine>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1829                 {
1830                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1831                         this->WriteLine(data);
1832                 }
1833                 for (std::vector<ELine>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1834                 {
1835                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1836                         this->WriteLine(data);
1837                 }
1838                 for (std::vector<ZLine>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1839                 {
1840                         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);
1841                         this->WriteLine(data);
1842                 }
1843                 for (std::vector<QLine>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1844                 {
1845                         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);
1846                         this->WriteLine(data);
1847                 }
1848                 for (std::vector<GLine>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1849                 {
1850                         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);
1851                         this->WriteLine(data);
1852                 }
1853                 for (std::vector<ELine>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1854                 {
1855                         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);
1856                         this->WriteLine(data);
1857                 }
1858         }
1859
1860         /* Send channel modes and topics */
1861         void SendChannelModes(TreeServer* Current)
1862         {
1863                 char data[MAXBUF];
1864                 std::deque<std::string> list;
1865                 int iterations = 0;
1866                 std::string n = this->Instance->Config->ServerName;
1867                 const char* sn = n.c_str();
1868                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1869                 {
1870                         SendFJoins(Current, c->second);
1871                         if (*c->second->topic)
1872                         {
1873                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1874                                 this->WriteLine(data);
1875                         }
1876                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1877                         list.clear();
1878                         c->second->GetExtList(list);
1879                         for (unsigned int j = 0; j < list.size(); j++)
1880                         {
1881                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1882                         }
1883                 }
1884         }
1885
1886         /* send all users and their oper state/modes */
1887         void SendUsers(TreeServer* Current)
1888         {
1889                 char data[MAXBUF];
1890                 std::deque<std::string> list;
1891                 int iterations = 0;
1892                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
1893                 {
1894                         if (u->second->registered == REG_ALL)
1895                         {
1896                                 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);
1897                                 this->WriteLine(data);
1898                                 if (*u->second->oper)
1899                                 {
1900                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1901                                 }
1902                                 if (*u->second->awaymsg)
1903                                 {
1904                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1905                                 }
1906                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1907                                 list.clear();
1908                                 u->second->GetExtList(list);
1909                                 for (unsigned int j = 0; j < list.size(); j++)
1910                                 {
1911                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1912                                 }
1913                         }
1914                 }
1915         }
1916
1917         /* This function is called when we want to send a netburst to a local
1918          * server. There is a set order we must do this, because for example
1919          * users require their servers to exist, and channels require their
1920          * users to exist. You get the idea.
1921          */
1922         void DoBurst(TreeServer* s)
1923         {
1924                 std::string burst = "BURST "+ConvToStr(time(NULL));
1925                 std::string endburst = "ENDBURST";
1926                 // Because by the end of the netburst, it  could be gone!
1927                 std::string name = s->GetName();
1928                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
1929                 this->WriteLine(burst);
1930                 /* send our version string */
1931                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
1932                 /* Send server tree */
1933                 this->SendServers(TreeRoot,s,1);
1934                 /* Send users and their oper status */
1935                 this->SendUsers(s);
1936                 /* Send everything else (channel modes, xlines etc) */
1937                 this->SendChannelModes(s);
1938                 this->SendXLines(s);
1939                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1940                 this->WriteLine(endburst);
1941                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
1942         }
1943
1944         /* This function is called when we receive data from a remote
1945          * server. We buffer the data in a std::string (it doesnt stay
1946          * there for long), reading using InspSocket::Read() which can
1947          * read up to 16 kilobytes in one operation.
1948          *
1949          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1950          * THE SOCKET OBJECT FOR US.
1951          */
1952         virtual bool OnDataReady()
1953         {
1954                 char* data = this->Read();
1955                 /* Check that the data read is a valid pointer and it has some content */
1956                 if (data && *data)
1957                 {
1958                         this->in_buffer.append(data);
1959                         /* While there is at least one new line in the buffer,
1960                          * do something useful (we hope!) with it.
1961                          */
1962                         while (in_buffer.find("\n") != std::string::npos)
1963                         {
1964                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1965                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1966                                 if (ret.find("\r") != std::string::npos)
1967                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1968                                 /* Process this one, abort if it
1969                                  * didnt return true.
1970                                  */
1971                                 if (this->ctx_in)
1972                                 {
1973                                         char out[1024];
1974                                         char result[1024];
1975                                         memset(result,0,1024);
1976                                         memset(out,0,1024);
1977                                         ServerInstance->Log(DEBUG,"Original string '%s'",ret.c_str());
1978                                         /* ERROR + CAPAB is still allowed unencryped */
1979                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1980                                         {
1981                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1982                                                 if ((nbytes > 0) && (nbytes < 1024))
1983                                                 {
1984                                                         ServerInstance->Log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1985                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1986                                                         for (int t = 0; t < nbytes; t++)
1987                                                                 if (result[t] == '\7') result[t] = 0;
1988                                                         ret = result;
1989                                                 }
1990                                         }
1991                                 }
1992                                 if (!this->ProcessLine(ret))
1993                                 {
1994                                         ServerInstance->Log(DEBUG,"ProcessLine says no!");
1995                                         return false;
1996                                 }
1997                         }
1998                         return true;
1999                 }
2000                 /* EAGAIN returns an empty but non-NULL string, so this
2001                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2002                  */
2003                 return (data && !*data);
2004         }
2005
2006         int WriteLine(std::string line)
2007         {
2008                 ServerInstance->Log(DEBUG,"OUT: %s",line.c_str());
2009                 if (this->ctx_out)
2010                 {
2011                         char result[10240];
2012                         char result64[10240];
2013                         if (this->keylength)
2014                         {
2015                                 // pad it to the key length
2016                                 int n = this->keylength - (line.length() % this->keylength);
2017                                 if (n)
2018                                 {
2019                                         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);
2020                                         line.append(n,'\7');
2021                                 }
2022                         }
2023                         unsigned int ll = line.length();
2024                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2025                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2026                         line = result64;
2027                         //int from64tobits(char *out, const char *in, int maxlen);
2028                 }
2029                 return this->Write(line + "\r\n");
2030         }
2031
2032         /* Handle ERROR command */
2033         bool Error(std::deque<std::string> &params)
2034         {
2035                 if (params.size() < 1)
2036                         return false;
2037                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2038                 /* we will return false to cause the socket to close. */
2039                 return false;
2040         }
2041
2042         /* remote MOTD. leet, huh? */
2043         bool Motd(std::string prefix, std::deque<std::string> &params)
2044         {
2045                 if (params.size() > 0)
2046                 {
2047                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2048                         {
2049                                 /* It's for our server */
2050                                 string_list results;
2051                                 userrec* source = this->Instance->FindNick(prefix);
2052
2053                                 if (source)
2054                                 {
2055                                         std::deque<std::string> par;
2056                                         par.push_back(prefix);
2057                                         par.push_back("");
2058
2059                                         if (!ServerInstance->Config->MOTD.size())
2060                                         {
2061                                                 par[1] = std::string("::")+ServerInstance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2062                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2063                                                 return true;
2064                                         }
2065
2066                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 375 "+source->nick+" :"+ServerInstance->Config->ServerName+" message of the day";
2067                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2068
2069                                         for (unsigned int i = 0; i < ServerInstance->Config->MOTD.size(); i++)
2070                                         {
2071                                                 par[1] = std::string("::")+ServerInstance->Config->ServerName+" 372 "+source->nick+" :- "+ServerInstance->Config->MOTD[i];
2072                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2073                                         }
2074
2075                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2076                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2077                                 }
2078                         }
2079                         else
2080                         {
2081                                 /* Pass it on */
2082                                 userrec* source = this->Instance->FindNick(prefix);
2083                                 if (source)
2084                                         DoOneToOne(prefix, "MOTD", params, params[0]);
2085                         }
2086                 }
2087                 return true;
2088         }
2089
2090         /* remote ADMIN. leet, huh? */
2091         bool Admin(std::string prefix, std::deque<std::string> &params)
2092         {
2093                 if (params.size() > 0)
2094                 {
2095                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2096                         {
2097                                 /* It's for our server */
2098                                 string_list results;
2099                                 userrec* source = this->Instance->FindNick(prefix);
2100
2101                                 if (source)
2102                                 {
2103                                         std::deque<std::string> par;
2104                                         par.push_back(prefix);
2105                                         par.push_back("");
2106
2107                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+ServerInstance->Config->ServerName;
2108                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2109
2110                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 257 "+source->nick+" :Name     - "+ServerInstance->Config->AdminName;
2111                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2112
2113                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+ServerInstance->Config->AdminNick;
2114                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2115
2116                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+ServerInstance->Config->AdminEmail;
2117                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2118                                 }
2119                         }
2120                         else
2121                         {
2122                                 /* Pass it on */
2123                                 userrec* source = this->Instance->FindNick(prefix);
2124                                 if (source)
2125                                         DoOneToOne(prefix, "ADMIN", params, params[0]);
2126                         }
2127                 }
2128                 return true;
2129         }
2130
2131         bool Stats(std::string prefix, std::deque<std::string> &params)
2132         {
2133                 /* Get the reply to a STATS query if it matches this servername,
2134                  * and send it back as a load of PUSH queries
2135                  */
2136                 if (params.size() > 1)
2137                 {
2138                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2139                         {
2140                                 /* It's for our server */
2141                                 string_list results;
2142                                 userrec* source = this->Instance->FindNick(prefix);
2143                                 if (source)
2144                                 {
2145                                         std::deque<std::string> par;
2146                                         par.push_back(prefix);
2147                                         par.push_back("");
2148                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2149                                         for (size_t i = 0; i < results.size(); i++)
2150                                         {
2151                                                 par[1] = "::" + results[i];
2152                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2153                                         }
2154                                 }
2155                         }
2156                         else
2157                         {
2158                                 /* Pass it on */
2159                                 userrec* source = this->Instance->FindNick(prefix);
2160                                 if (source)
2161                                         DoOneToOne(prefix, "STATS", params, params[1]);
2162                         }
2163                 }
2164                 return true;
2165         }
2166
2167
2168         /* Because the core won't let users or even SERVERS set +o,
2169          * we use the OPERTYPE command to do this.
2170          */
2171         bool OperType(std::string prefix, std::deque<std::string> &params)
2172         {
2173                 if (params.size() != 1)
2174                 {
2175                         ServerInstance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2176                         return true;
2177                 }
2178                 std::string opertype = params[0];
2179                 userrec* u = this->Instance->FindNick(prefix);
2180                 if (u)
2181                 {
2182                         u->modes[UM_OPERATOR] = 1;
2183                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2184                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2185                 }
2186                 return true;
2187         }
2188
2189         /* Because Andy insists that services-compatible servers must
2190          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2191          */
2192         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2193         {
2194                 if (params.size() < 3)
2195                         return true;
2196
2197                 userrec* u = this->Instance->FindNick(params[0]);
2198
2199                 if (u)
2200                 {
2201                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2202                         if (IS_LOCAL(u))
2203                         {
2204                                 std::deque<std::string> par;
2205                                 par.push_back(params[1]);
2206                                 /* This is not required as one is sent in OnUserPostNick below
2207                                  */
2208                                 //DoOneToMany(u->nick,"NICK",par);
2209                                 if (!u->ForceNickChange(params[1].c_str()))
2210                                 {
2211                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2212                                         return true;
2213                                 }
2214                                 u->age = atoi(params[2].c_str());
2215                         }
2216                 }
2217                 return true;
2218         }
2219
2220         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2221         {
2222                 if (params.size() < 2)
2223                         return true;
2224
2225                 userrec* u = this->Instance->FindNick(params[0]);
2226
2227                 if (u)
2228                 {
2229                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2230                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2231                 }
2232                 return true;
2233         }
2234
2235         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2236         {
2237                 if (params.size() < 1)
2238                         return false;
2239
2240                 std::string servermask = params[0];
2241
2242                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2243                 {
2244                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2245                         this->Instance->RehashServer();
2246                         ReadConfiguration(false);
2247                 }
2248                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2249                 return true;
2250         }
2251
2252         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2253         {
2254                 if (params.size() != 2)
2255                         return true;
2256
2257                 std::string nick = params[0];
2258                 userrec* u = this->Instance->FindNick(prefix);
2259                 userrec* who = this->Instance->FindNick(nick);
2260
2261                 if (who)
2262                 {
2263                         /* Prepend kill source, if we don't have one */
2264                         std::string sourceserv = prefix;
2265                         if (u)
2266                         {
2267                                 sourceserv = u->server;
2268                         }
2269                         if (*(params[1].c_str()) != '[')
2270                         {
2271                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2272                         }
2273                         std::string reason = params[1];
2274                         params[1] = ":" + params[1];
2275                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2276                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2277                         userrec::QuitUser(this->Instance,who,reason);
2278                 }
2279                 return true;
2280         }
2281
2282         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2283         {
2284                 if (params.size() < 1)
2285                         return true;
2286
2287                 if (params.size() == 1)
2288                 {
2289                         TreeServer* ServerSource = FindServer(prefix);
2290                         if (ServerSource)
2291                         {
2292                                 ServerSource->SetPingFlag();
2293                         }
2294                 }
2295                 else
2296                 {
2297                         std::string forwardto = params[1];
2298                         if (forwardto == this->Instance->Config->ServerName)
2299                         {
2300                                 /*
2301                                  * this is a PONG for us
2302                                  * if the prefix is a user, check theyre local, and if they are,
2303                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2304                                  * Services might want to send these s->s, but we dont need to yet.
2305                                  */
2306                                 userrec* u = this->Instance->FindNick(prefix);
2307
2308                                 if (u)
2309                                 {
2310                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2311                                 }
2312                         }
2313                         else
2314                         {
2315                                 // not for us, pass it on :)
2316                                 DoOneToOne(prefix,"PONG",params,forwardto);
2317                         }
2318                 }
2319
2320                 return true;
2321         }
2322
2323         bool MetaData(std::string prefix, std::deque<std::string> &params)
2324         {
2325                 if (params.size() < 3)
2326                         return true;
2327
2328                 TreeServer* ServerSource = FindServer(prefix);
2329
2330                 if (ServerSource)
2331                 {
2332                         if (params[0] == "*")
2333                         {
2334                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2335                         }
2336                         else if (*(params[0].c_str()) == '#')
2337                         {
2338                                 chanrec* c = this->Instance->FindChan(params[0]);
2339                                 if (c)
2340                                 {
2341                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2342                                 }
2343                         }
2344                         else if (*(params[0].c_str()) != '#')
2345                         {
2346                                 userrec* u = this->Instance->FindNick(params[0]);
2347                                 if (u)
2348                                 {
2349                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2350                                 }
2351                         }
2352                 }
2353
2354                 params[2] = ":" + params[2];
2355                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2356                 return true;
2357         }
2358
2359         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2360         {
2361                 if (params.size() < 1)
2362                         return true;
2363
2364                 TreeServer* ServerSource = FindServer(prefix);
2365
2366                 if (ServerSource)
2367                 {
2368                         ServerSource->SetVersion(params[0]);
2369                 }
2370                 params[0] = ":" + params[0];
2371                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2372                 return true;
2373         }
2374
2375         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2376         {
2377                 if (params.size() < 1)
2378                         return true;
2379
2380                 userrec* u = this->Instance->FindNick(prefix);
2381
2382                 if (u)
2383                 {
2384                         u->ChangeDisplayedHost(params[0].c_str());
2385                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2386                 }
2387                 return true;
2388         }
2389
2390         bool AddLine(std::string prefix, std::deque<std::string> &params)
2391         {
2392                 if (params.size() < 6)
2393                         return true;
2394
2395                 bool propogate = false;
2396
2397                 switch (*(params[0].c_str()))
2398                 {
2399                         case 'Z':
2400                                 propogate = ServerInstance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2401                                 ServerInstance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2402                         break;
2403                         case 'Q':
2404                                 propogate = ServerInstance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2405                                 ServerInstance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2406                         break;
2407                         case 'E':
2408                                 propogate = ServerInstance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2409                                 ServerInstance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2410                         break;
2411                         case 'G':
2412                                 propogate = ServerInstance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2413                                 ServerInstance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2414                         break;
2415                         case 'K':
2416                                 propogate = ServerInstance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2417                         break;
2418                         default:
2419                                 /* Just in case... */
2420                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2421                                 propogate = false;
2422                         break;
2423                 }
2424
2425                 /* Send it on its way */
2426                 if (propogate)
2427                 {
2428                         if (atoi(params[4].c_str()))
2429                         {
2430                                 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());
2431                         }
2432                         else
2433                         {
2434                                 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());
2435                         }
2436                         params[5] = ":" + params[5];
2437                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2438                 }
2439                 if (!this->bursting)
2440                 {
2441                         ServerInstance->Log(DEBUG,"Applying lines...");
2442                         ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2443                 }
2444                 return true;
2445         }
2446
2447         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2448         {
2449                 if (params.size() < 1)
2450                         return true;
2451
2452                 userrec* u = this->Instance->FindNick(prefix);
2453
2454                 if (u)
2455                 {
2456                         u->ChangeName(params[0].c_str());
2457                         params[0] = ":" + params[0];
2458                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2459                 }
2460                 return true;
2461         }
2462
2463         bool Whois(std::string prefix, std::deque<std::string> &params)
2464         {
2465                 if (params.size() < 1)
2466                         return true;
2467
2468                 ServerInstance->Log(DEBUG,"In IDLE command");
2469                 userrec* u = this->Instance->FindNick(prefix);
2470
2471                 if (u)
2472                 {
2473                         ServerInstance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2474                         // an incoming request
2475                         if (params.size() == 1)
2476                         {
2477                                 userrec* x = this->Instance->FindNick(params[0]);
2478                                 if ((x) && (IS_LOCAL(x)))
2479                                 {
2480                                         userrec* x = this->Instance->FindNick(params[0]);
2481                                         ServerInstance->Log(DEBUG,"Got IDLE");
2482                                         char signon[MAXBUF];
2483                                         char idle[MAXBUF];
2484                                         ServerInstance->Log(DEBUG,"Sending back IDLE 3");
2485                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2486                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2487                                         std::deque<std::string> par;
2488                                         par.push_back(prefix);
2489                                         par.push_back(signon);
2490                                         par.push_back(idle);
2491                                         // ours, we're done, pass it BACK
2492                                         DoOneToOne(params[0],"IDLE",par,u->server);
2493                                 }
2494                                 else
2495                                 {
2496                                         // not ours pass it on
2497                                         DoOneToOne(prefix,"IDLE",params,x->server);
2498                                 }
2499                         }
2500                         else if (params.size() == 3)
2501                         {
2502                                 std::string who_did_the_whois = params[0];
2503                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2504                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2505                                 {
2506                                         ServerInstance->Log(DEBUG,"Got final IDLE");
2507                                         // an incoming reply to a whois we sent out
2508                                         std::string nick_whoised = prefix;
2509                                         unsigned long signon = atoi(params[1].c_str());
2510                                         unsigned long idle = atoi(params[2].c_str());
2511                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2512                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2513                                 }
2514                                 else
2515                                 {
2516                                         // not ours, pass it on
2517                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2518                                 }
2519                         }
2520                 }
2521                 return true;
2522         }
2523
2524         bool Push(std::string prefix, std::deque<std::string> &params)
2525         {
2526                 if (params.size() < 2)
2527                         return true;
2528
2529                 userrec* u = this->Instance->FindNick(params[0]);
2530
2531                 if (!u)
2532                         return true;
2533
2534                 if (IS_LOCAL(u))
2535                 {
2536                         u->Write(params[1]);
2537                 }
2538                 else
2539                 {
2540                         // continue the raw onwards
2541                         params[1] = ":" + params[1];
2542                         DoOneToOne(prefix,"PUSH",params,u->server);
2543                 }
2544                 return true;
2545         }
2546
2547         bool Time(std::string prefix, std::deque<std::string> &params)
2548         {
2549                 // :source.server TIME remote.server sendernick
2550                 // :remote.server TIME source.server sendernick TS
2551                 if (params.size() == 2)
2552                 {
2553                         // someone querying our time?
2554                         if (this->Instance->Config->ServerName == params[0])
2555                         {
2556                                 userrec* u = this->Instance->FindNick(params[1]);
2557                                 if (u)
2558                                 {
2559                                         char curtime[256];
2560                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2561                                         params.push_back(curtime);
2562                                         params[0] = prefix;
2563                                         DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2564                                 }
2565                         }
2566                         else
2567                         {
2568                                 // not us, pass it on
2569                                 userrec* u = this->Instance->FindNick(params[1]);
2570                                 if (u)
2571                                         DoOneToOne(prefix,"TIME",params,params[0]);
2572                         }
2573                 }
2574                 else if (params.size() == 3)
2575                 {
2576                         // a response to a previous TIME
2577                         userrec* u = this->Instance->FindNick(params[1]);
2578                         if ((u) && (IS_LOCAL(u)))
2579                         {
2580                         time_t rawtime = atol(params[2].c_str());
2581                         struct tm * timeinfo;
2582                         timeinfo = localtime(&rawtime);
2583                                 char tms[26];
2584                                 snprintf(tms,26,"%s",asctime(timeinfo));
2585                                 tms[24] = 0;
2586                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2587                         }
2588                         else
2589                         {
2590                                 if (u)
2591                                         DoOneToOne(prefix,"TIME",params,u->server);
2592                         }
2593                 }
2594                 return true;
2595         }
2596
2597         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2598         {
2599                 if (params.size() < 1)
2600                         return true;
2601
2602                 if (params.size() == 1)
2603                 {
2604                         std::string stufftobounce = params[0];
2605                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2606                         return true;
2607                 }
2608                 else
2609                 {
2610                         std::string forwardto = params[1];
2611                         if (forwardto == this->Instance->Config->ServerName)
2612                         {
2613                                 // this is a ping for us, send back PONG to the requesting server
2614                                 params[1] = params[0];
2615                                 params[0] = forwardto;
2616                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2617                         }
2618                         else
2619                         {
2620                                 // not for us, pass it on :)
2621                                 DoOneToOne(prefix,"PING",params,forwardto);
2622                         }
2623                         return true;
2624                 }
2625         }
2626
2627         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2628         {
2629                 if (params.size() < 4)
2630                         return false;
2631
2632                 std::string servername = params[0];
2633                 std::string password = params[1];
2634                 // hopcount is not used for a remote server, we calculate this ourselves
2635                 std::string description = params[3];
2636                 TreeServer* ParentOfThis = FindServer(prefix);
2637
2638                 if (!ParentOfThis)
2639                 {
2640                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2641                         return false;
2642                 }
2643                 TreeServer* CheckDupe = FindServer(servername);
2644                 if (CheckDupe)
2645                 {
2646                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2647                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2648                         return false;
2649                 }
2650                 TreeServer* Node = new TreeServer(this->Instance,servername,description,ParentOfThis,NULL);
2651                 ParentOfThis->AddChild(Node);
2652                 params[3] = ":" + params[3];
2653                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2654                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2655                 return true;
2656         }
2657
2658         bool Outbound_Reply_Server(std::deque<std::string> &params)
2659         {
2660                 if (params.size() < 4)
2661                         return false;
2662
2663                 irc::string servername = params[0].c_str();
2664                 std::string sname = params[0];
2665                 std::string password = params[1];
2666                 int hops = atoi(params[2].c_str());
2667
2668                 if (hops)
2669                 {
2670                         this->WriteLine("ERROR :Server too far away for authentication");
2671                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2672                         return false;
2673                 }
2674                 std::string description = params[3];
2675                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2676                 {
2677                         if ((x->Name == servername) && (x->RecvPass == password))
2678                         {
2679                                 TreeServer* CheckDupe = FindServer(sname);
2680                                 if (CheckDupe)
2681                                 {
2682                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2683                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2684                                         return false;
2685                                 }
2686                                 // Begin the sync here. this kickstarts the
2687                                 // other side, waiting in WAIT_AUTH_2 state,
2688                                 // into starting their burst, as it shows
2689                                 // that we're happy.
2690                                 this->LinkState = CONNECTED;
2691                                 // we should add the details of this server now
2692                                 // to the servers tree, as a child of the root
2693                                 // node.
2694                                 TreeServer* Node = new TreeServer(this->Instance,sname,description,TreeRoot,this);
2695                                 TreeRoot->AddChild(Node);
2696                                 params[3] = ":" + params[3];
2697                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2698                                 this->bursting = true;
2699                                 this->DoBurst(Node);
2700                                 return true;
2701                         }
2702                 }
2703                 this->WriteLine("ERROR :Invalid credentials");
2704                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2705                 return false;
2706         }
2707
2708         bool Inbound_Server(std::deque<std::string> &params)
2709         {
2710                 if (params.size() < 4)
2711                         return false;
2712
2713                 irc::string servername = params[0].c_str();
2714                 std::string sname = params[0];
2715                 std::string password = params[1];
2716                 int hops = atoi(params[2].c_str());
2717
2718                 if (hops)
2719                 {
2720                         this->WriteLine("ERROR :Server too far away for authentication");
2721                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2722                         return false;
2723                 }
2724                 std::string description = params[3];
2725                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2726                 {
2727                         if ((x->Name == servername) && (x->RecvPass == password))
2728                         {
2729                                 TreeServer* CheckDupe = FindServer(sname);
2730                                 if (CheckDupe)
2731                                 {
2732                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2733                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2734                                         return false;
2735                                 }
2736                                 /* If the config says this link is encrypted, but the remote side
2737                                  * hasnt bothered to send the AES command before SERVER, then we
2738                                  * boot them off as we MUST have this connection encrypted.
2739                                  */
2740                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2741                                 {
2742                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2743                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2744                                         return false;
2745                                 }
2746                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2747                                 this->InboundServerName = sname;
2748                                 this->InboundDescription = description;
2749                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2750                                 // along with the sendpass from this block.
2751                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2752                                 // move to the next state, we are now waiting for THEM.
2753                                 this->LinkState = WAIT_AUTH_2;
2754                                 return true;
2755                         }
2756                 }
2757                 this->WriteLine("ERROR :Invalid credentials");
2758                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2759                 return false;
2760         }
2761
2762         void Split(std::string line, std::deque<std::string> &n)
2763         {
2764                 n.clear();
2765                 irc::tokenstream tokens(line);
2766                 std::string param;
2767                 while ((param = tokens.GetToken()) != "")
2768                         n.push_back(param);
2769                 return;
2770         }
2771
2772         bool ProcessLine(std::string line)
2773         {
2774                 std::deque<std::string> params;
2775                 irc::string command;
2776                 std::string prefix;
2777
2778                 if (line.empty())
2779                         return true;
2780
2781                 line = line.substr(0, line.find_first_of("\r\n"));
2782
2783                 ServerInstance->Log(DEBUG,"IN: %s", line.c_str());
2784
2785                 this->Split(line.c_str(),params);
2786
2787                 if ((params[0][0] == ':') && (params.size() > 1))
2788                 {
2789                         prefix = params[0].substr(1);
2790                         params.pop_front();
2791                 }
2792
2793                 command = params[0].c_str();
2794                 params.pop_front();
2795
2796                 if ((!this->ctx_in) && (command == "AES"))
2797                 {
2798                         std::string sserv = params[0];
2799                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2800                         {
2801                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2802                                 {
2803                                         this->InitAES(x->EncryptionKey,sserv);
2804                                 }
2805                         }
2806
2807                         return true;
2808                 }
2809                 else if ((this->ctx_in) && (command == "AES"))
2810                 {
2811                         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());
2812                 }
2813
2814                 switch (this->LinkState)
2815                 {
2816                         TreeServer* Node;
2817
2818                         case WAIT_AUTH_1:
2819                                 // Waiting for SERVER command from remote server. Server initiating
2820                                 // the connection sends the first SERVER command, listening server
2821                                 // replies with theirs if its happy, then if the initiator is happy,
2822                                 // it starts to send its net sync, which starts the merge, otherwise
2823                                 // it sends an ERROR.
2824                                 if (command == "PASS")
2825                                 {
2826                                         /* Silently ignored */
2827                                 }
2828                                 else if (command == "SERVER")
2829                                 {
2830                                         return this->Inbound_Server(params);
2831                                 }
2832                                 else if (command == "ERROR")
2833                                 {
2834                                         return this->Error(params);
2835                                 }
2836                                 else if (command == "USER")
2837                                 {
2838                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2839                                         return false;
2840                                 }
2841                                 else if (command == "CAPAB")
2842                                 {
2843                                         return this->Capab(params);
2844                                 }
2845                                 else if ((command == "U") || (command == "S"))
2846                                 {
2847                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2848                                         return false;
2849                                 }
2850                                 else
2851                                 {
2852                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2853                                         return false;
2854                                 }
2855                         break;
2856                         case WAIT_AUTH_2:
2857                                 // Waiting for start of other side's netmerge to say they liked our
2858                                 // password.
2859                                 if (command == "SERVER")
2860                                 {
2861                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2862                                         // silently ignore.
2863                                         return true;
2864                                 }
2865                                 else if ((command == "U") || (command == "S"))
2866                                 {
2867                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2868                                         return false;
2869                                 }
2870                                 else if (command == "BURST")
2871                                 {
2872                                         if (params.size())
2873                                         {
2874                                                 /* If a time stamp is provided, try and check syncronization */
2875                                                 time_t THEM = atoi(params[0].c_str());
2876                                                 long delta = THEM-time(NULL);
2877                                                 if ((delta < -600) || (delta > 600))
2878                                                 {
2879                                                         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));
2880                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2881                                                         return false;
2882                                                 }
2883                                                 else if ((delta < -60) || (delta > 60))
2884                                                 {
2885                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2886                                                 }
2887                                         }
2888                                         this->LinkState = CONNECTED;
2889                                         Node = new TreeServer(this->Instance,InboundServerName,InboundDescription,TreeRoot,this);
2890                                         TreeRoot->AddChild(Node);
2891                                         params.clear();
2892                                         params.push_back(InboundServerName);
2893                                         params.push_back("*");
2894                                         params.push_back("1");
2895                                         params.push_back(":"+InboundDescription);
2896                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2897                                         this->bursting = true;
2898                                         this->DoBurst(Node);
2899                                 }
2900                                 else if (command == "ERROR")
2901                                 {
2902                                         return this->Error(params);
2903                                 }
2904                                 else if (command == "CAPAB")
2905                                 {
2906                                         return this->Capab(params);
2907                                 }
2908
2909                         break;
2910                         case LISTENER:
2911                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2912                                 return false;
2913                         break;
2914                         case CONNECTING:
2915                                 if (command == "SERVER")
2916                                 {
2917                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2918                                         // has just sent us their credentials. If we get this far, theyre
2919                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2920                                         // if we're happy with this, we should send our netburst which
2921                                         // kickstarts the merge.
2922                                         return this->Outbound_Reply_Server(params);
2923                                 }
2924                                 else if (command == "ERROR")
2925                                 {
2926                                         return this->Error(params);
2927                                 }
2928                         break;
2929                         case CONNECTED:
2930                                 // This is the 'authenticated' state, when all passwords
2931                                 // have been exchanged and anything past this point is taken
2932                                 // as gospel.
2933
2934                                 if (prefix != "")
2935                                 {
2936                                         std::string direction = prefix;
2937                                         userrec* t = this->Instance->FindNick(prefix);
2938                                         if (t)
2939                                         {
2940                                                 direction = t->server;
2941                                         }
2942                                         TreeServer* route_back_again = BestRouteTo(direction);
2943                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2944                                         {
2945                                                 if (route_back_again)
2946                                                         ServerInstance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2947                                                 return true;
2948                                         }
2949
2950                                         /* Fix by brain:
2951                                          * When there is activity on the socket, reset the ping counter so
2952                                          * that we're not wasting bandwidth pinging an active server.
2953                                          */
2954                                         route_back_again->SetNextPingTime(time(NULL) + 60);
2955                                         route_back_again->SetPingFlag();
2956                                 }
2957
2958                                 if (command == "SVSMODE")
2959                                 {
2960                                         /* Services expects us to implement
2961                                          * SVSMODE. In inspircd its the same as
2962                                          * MODE anyway.
2963                                          */
2964                                         command = "MODE";
2965                                 }
2966                                 std::string target = "";
2967                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
2968                                  * working with std::string here.
2969                                  */
2970                                 if ((command == "NICK") && (params.size() > 1))
2971                                 {
2972                                         return this->IntroduceClient(prefix,params);
2973                                 }
2974                                 else if (command == "FJOIN")
2975                                 {
2976                                         return this->ForceJoin(prefix,params);
2977                                 }
2978                                 else if (command == "STATS")
2979                                 {
2980                                         return this->Stats(prefix, params);
2981                                 }
2982                                 else if (command == "MOTD")
2983                                 {
2984                                         return this->Motd(prefix, params);
2985                                 }
2986                                 else if (command == "ADMIN")
2987                                 {
2988                                         return this->Admin(prefix, params);
2989                                 }
2990                                 else if (command == "SERVER")
2991                                 {
2992                                         return this->RemoteServer(prefix,params);
2993                                 }
2994                                 else if (command == "ERROR")
2995                                 {
2996                                         return this->Error(params);
2997                                 }
2998                                 else if (command == "OPERTYPE")
2999                                 {
3000                                         return this->OperType(prefix,params);
3001                                 }
3002                                 else if (command == "FMODE")
3003                                 {
3004                                         return this->ForceMode(prefix,params);
3005                                 }
3006                                 else if (command == "KILL")
3007                                 {
3008                                         return this->RemoteKill(prefix,params);
3009                                 }
3010                                 else if (command == "FTOPIC")
3011                                 {
3012                                         return this->ForceTopic(prefix,params);
3013                                 }
3014                                 else if (command == "REHASH")
3015                                 {
3016                                         return this->RemoteRehash(prefix,params);
3017                                 }
3018                                 else if (command == "METADATA")
3019                                 {
3020                                         return this->MetaData(prefix,params);
3021                                 }
3022                                 else if (command == "PING")
3023                                 {
3024                                         /*
3025                                          * We just got a ping from a server that's bursting.
3026                                          * This can't be right, so set them to not bursting, and
3027                                          * apply their lines.
3028                                          */
3029                                         if (this->bursting)
3030                                         {
3031                                                 this->bursting = false;
3032                                                 ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3033                                         }
3034                                         if (prefix == "")
3035                                         {
3036                                                 prefix = this->GetName();
3037                                         }
3038                                         return this->LocalPing(prefix,params);
3039                                 }
3040                                 else if (command == "PONG")
3041                                 {
3042                                         /*
3043                                          * We just got a pong from a server that's bursting.
3044                                          * This can't be right, so set them to not bursting, and
3045                                          * apply their lines.
3046                                          */
3047                                         if (this->bursting)
3048                                         {
3049                                                 this->bursting = false;
3050                                                 ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3051                                         }
3052                                         if (prefix == "")
3053                                         {
3054                                                 prefix = this->GetName();
3055                                         }
3056                                         return this->LocalPong(prefix,params);
3057                                 }
3058                                 else if (command == "VERSION")
3059                                 {
3060                                         return this->ServerVersion(prefix,params);
3061                                 }
3062                                 else if (command == "FHOST")
3063                                 {
3064                                         return this->ChangeHost(prefix,params);
3065                                 }
3066                                 else if (command == "FNAME")
3067                                 {
3068                                         return this->ChangeName(prefix,params);
3069                                 }
3070                                 else if (command == "ADDLINE")
3071                                 {
3072                                         return this->AddLine(prefix,params);
3073                                 }
3074                                 else if (command == "SVSNICK")
3075                                 {
3076                                         if (prefix == "")
3077                                         {
3078                                                 prefix = this->GetName();
3079                                         }
3080                                         return this->ForceNick(prefix,params);
3081                                 }
3082                                 else if (command == "IDLE")
3083                                 {
3084                                         return this->Whois(prefix,params);
3085                                 }
3086                                 else if (command == "PUSH")
3087                                 {
3088                                         return this->Push(prefix,params);
3089                                 }
3090                                 else if (command == "TIME")
3091                                 {
3092                                         return this->Time(prefix,params);
3093                                 }
3094                                 else if ((command == "KICK") && (IsServer(prefix)))
3095                                 {
3096                                         std::string sourceserv = this->myhost;
3097                                         if (params.size() == 3)
3098                                         {
3099                                                 userrec* user = this->Instance->FindNick(params[1]);
3100                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3101                                                 if (user && chan)
3102                                                 {
3103                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3104                                                                 /* Yikes, the channels gone! */
3105                                                                 delete chan;
3106                                                 }
3107                                         }
3108                                         if (this->InboundServerName != "")
3109                                         {
3110                                                 sourceserv = this->InboundServerName;
3111                                         }
3112                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3113                                 }
3114                                 else if (command == "SVSJOIN")
3115                                 {
3116                                         if (prefix == "")
3117                                         {
3118                                                 prefix = this->GetName();
3119                                         }
3120                                         return this->ServiceJoin(prefix,params);
3121                                 }
3122                                 else if (command == "SQUIT")
3123                                 {
3124                                         if (params.size() == 2)
3125                                         {
3126                                                 this->Squit(FindServer(params[0]),params[1]);
3127                                         }
3128                                         return true;
3129                                 }
3130                                 else if (command == "ENDBURST")
3131                                 {
3132                                         this->bursting = false;
3133                                         ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3134                                         std::string sourceserv = this->myhost;
3135                                         if (this->InboundServerName != "")
3136                                         {
3137                                                 sourceserv = this->InboundServerName;
3138                                         }
3139                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3140                                         return true;
3141                                 }
3142                                 else
3143                                 {
3144                                         // not a special inter-server command.
3145                                         // Emulate the actual user doing the command,
3146                                         // this saves us having a huge ugly parser.
3147                                         userrec* who = this->Instance->FindNick(prefix);
3148                                         std::string sourceserv = this->myhost;
3149                                         if (this->InboundServerName != "")
3150                                         {
3151                                                 sourceserv = this->InboundServerName;
3152                                         }
3153                                         if (who)
3154                                         {
3155                                                 if ((command == "NICK") && (params.size() > 0))
3156                                                 {
3157                                                         /* On nick messages, check that the nick doesnt
3158                                                          * already exist here. If it does, kill their copy,
3159                                                          * and our copy.
3160                                                          */
3161                                                         userrec* x = this->Instance->FindNick(params[0]);
3162                                                         if ((x) && (x != who))
3163                                                         {
3164                                                                 std::deque<std::string> p;
3165                                                                 p.push_back(params[0]);
3166                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3167                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3168                                                                 p.clear();
3169                                                                 p.push_back(prefix);
3170                                                                 p.push_back("Nickname collision");
3171                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3172                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3173                                                                 userrec* y = this->Instance->FindNick(prefix);
3174                                                                 if (y)
3175                                                                 {
3176                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3177                                                                 }
3178                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3179                                                         }
3180                                                 }
3181                                                 // its a user
3182                                                 target = who->server;
3183                                                 const char* strparams[127];
3184                                                 for (unsigned int q = 0; q < params.size(); q++)
3185                                                 {
3186                                                         strparams[q] = params[q].c_str();
3187                                                 }
3188                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3189                                                 {
3190                                                         case CMD_INVALID:
3191                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3192                                                                 return false;
3193                                                         break;
3194                                                         case CMD_FAILURE:
3195                                                                 return true;
3196                                                         break;
3197                                                         default:
3198                                                         break;
3199                                                 }
3200                                         }
3201                                         else
3202                                         {
3203                                                 // its not a user. Its either a server, or somethings screwed up.
3204                                                 if (IsServer(prefix))
3205                                                 {
3206                                                         target = this->Instance->Config->ServerName;
3207                                                 }
3208                                                 else
3209                                                 {
3210                                                         ServerInstance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3211                                                         return true;
3212                                                 }
3213                                         }
3214                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3215
3216                                 }
3217                                 return true;
3218                         break;
3219                 }
3220                 return true;
3221         }
3222
3223         virtual std::string GetName()
3224         {
3225                 std::string sourceserv = this->myhost;
3226                 if (this->InboundServerName != "")
3227                 {
3228                         sourceserv = this->InboundServerName;
3229                 }
3230                 return sourceserv;
3231         }
3232
3233         virtual void OnTimeout()
3234         {
3235                 if (this->LinkState == CONNECTING)
3236                 {
3237                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3238                         Link* MyLink = FindLink(myhost);
3239                         if (MyLink)
3240                                 DoFailOver(MyLink);
3241                 }
3242         }
3243
3244         virtual void OnClose()
3245         {
3246                 // Connection closed.
3247                 // If the connection is fully up (state CONNECTED)
3248                 // then propogate a netsplit to all peers.
3249                 std::string quitserver = this->myhost;
3250                 if (this->InboundServerName != "")
3251                 {
3252                         quitserver = this->InboundServerName;
3253                 }
3254                 TreeServer* s = FindServer(quitserver);
3255                 if (s)
3256                 {
3257                         Squit(s,"Remote host closed the connection");
3258                 }
3259                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3260         }
3261
3262         virtual int OnIncomingConnection(int newsock, char* ip)
3263         {
3264                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3265                  * or discovering if this port is the server port, we don't allow connections from any
3266                  * IPs for which we don't have a link block.
3267                  */
3268                 bool found = false;
3269
3270                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3271                 if (!found)
3272                 {
3273                         for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
3274                                 if (MatchCIDR(ip, (*i).c_str()))
3275                                         found = true;
3276
3277                         if (!found)
3278                         {
3279                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3280                                 close(newsock);
3281                                 return false;
3282                         }
3283                 }
3284                 TreeSocket* s = new TreeSocket(this->Instance, newsock, ip);
3285                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3286                 return true;
3287         }
3288 };
3289
3290 /** This class is used to resolve server hostnames during /connect and autoconnect.
3291  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3292  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3293  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3294  * will have an IP address which we can then use to continue our connection.
3295  */
3296 class ServernameResolver : public Resolver
3297 {
3298  private:
3299         /** A copy of the Link tag info for what we're connecting to.
3300          * We take a copy, rather than using a pointer, just in case the
3301          * admin takes the tag away and rehashes while the domain is resolving.
3302          */
3303         Link MyLink;
3304  public:
3305         ServernameResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3306         {
3307                 /* Nothing in here, folks */
3308         }
3309
3310         void OnLookupComplete(const std::string &result)
3311         {
3312                 /* Initiate the connection, now that we have an IP to use.
3313                  * Passing a hostname directly to InspSocket causes it to
3314                  * just bail and set its FD to -1.
3315                  */
3316                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3317                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3318                 {
3319                         TreeSocket* newsocket = new TreeSocket(ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3320                         if (newsocket->GetFd() > -1)
3321                         {
3322                                 /* We're all OK */
3323                         }
3324                         else
3325                         {
3326                                 /* Something barfed, show the opers */
3327                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3328                                 delete newsocket;
3329                                 DoFailOver(&MyLink);
3330                         }
3331                 }
3332         }
3333
3334         void OnError(ResolverError e, const std::string &errormessage)
3335         {
3336                 /* Ooops! */
3337                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3338                 DoFailOver(&MyLink);
3339         }
3340 };
3341
3342 class SecurityIPResolver : public Resolver
3343 {
3344  private:
3345         Link MyLink;
3346  public:
3347         SecurityIPResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3348         {
3349         }
3350
3351         void OnLookupComplete(const std::string &result)
3352         {
3353                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3354                 ValidIPs.push_back(result);
3355         }
3356
3357         void OnError(ResolverError e, const std::string &errormessage)
3358         {
3359                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3360         }
3361 };
3362
3363 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3364 {
3365         for (unsigned int c = 0; c < list.size(); c++)
3366         {
3367                 if (list[c] == server)
3368                 {
3369                         return;
3370                 }
3371         }
3372         list.push_back(server);
3373 }
3374
3375 // returns a list of DIRECT servernames for a specific channel
3376 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3377 {
3378         CUList *ulist = c->GetUsers();
3379         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3380         {
3381                 if (i->second->GetFd() < 0)
3382                 {
3383                         TreeServer* best = BestRouteTo(i->second->server);
3384                         if (best)
3385                                 AddThisServer(best,list);
3386                 }
3387         }
3388         return;
3389 }
3390
3391 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3392 {
3393         TreeServer* omitroute = BestRouteTo(omit);
3394         if ((command == "NOTICE") || (command == "PRIVMSG"))
3395         {
3396                 if (params.size() >= 2)
3397                 {
3398                         /* Prefixes */
3399                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3400                         {
3401                                 params[0] = params[0].substr(1, params[0].length()-1);
3402                         }
3403                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3404                         {
3405                                 // special routing for private messages/notices
3406                                 userrec* d = ServerInstance->FindNick(params[0]);
3407                                 if (d)
3408                                 {
3409                                         std::deque<std::string> par;
3410                                         par.push_back(params[0]);
3411                                         par.push_back(":"+params[1]);
3412                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3413                                         return true;
3414                                 }
3415                         }
3416                         else if (*(params[0].c_str()) == '$')
3417                         {
3418                                 std::deque<std::string> par;
3419                                 par.push_back(params[0]);
3420                                 par.push_back(":"+params[1]);
3421                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3422                                 return true;
3423                         }
3424                         else
3425                         {
3426                                 ServerInstance->Log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3427                                 chanrec* c = ServerInstance->FindChan(params[0]);
3428                                 if (c)
3429                                 {
3430                                         std::deque<TreeServer*> list;
3431                                         GetListOfServersForChannel(c,list);
3432                                         ServerInstance->Log(DEBUG,"Got a list of %d servers",list.size());
3433                                         unsigned int lsize = list.size();
3434                                         for (unsigned int i = 0; i < lsize; i++)
3435                                         {
3436                                                 TreeSocket* Sock = list[i]->GetSocket();
3437                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3438                                                 {
3439                                                         ServerInstance->Log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3440                                                         Sock->WriteLine(data);
3441                                                 }
3442                                         }
3443                                         return true;
3444                                 }
3445                         }
3446                 }
3447         }
3448         unsigned int items = TreeRoot->ChildCount();
3449         for (unsigned int x = 0; x < items; x++)
3450         {
3451                 TreeServer* Route = TreeRoot->GetChild(x);
3452                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3453                 {
3454                         TreeSocket* Sock = Route->GetSocket();
3455                         if (Sock)
3456                                 Sock->WriteLine(data);
3457                 }
3458         }
3459         return true;
3460 }
3461
3462 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3463 {
3464         TreeServer* omitroute = BestRouteTo(omit);
3465         std::string FullLine = ":" + prefix + " " + command;
3466         unsigned int words = params.size();
3467         for (unsigned int x = 0; x < words; x++)
3468         {
3469                 FullLine = FullLine + " " + params[x];
3470         }
3471         unsigned int items = TreeRoot->ChildCount();
3472         for (unsigned int x = 0; x < items; x++)
3473         {
3474                 TreeServer* Route = TreeRoot->GetChild(x);
3475                 // Send the line IF:
3476                 // The route has a socket (its a direct connection)
3477                 // The route isnt the one to be omitted
3478                 // The route isnt the path to the one to be omitted
3479                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3480                 {
3481                         TreeSocket* Sock = Route->GetSocket();
3482                         if (Sock)
3483                                 Sock->WriteLine(FullLine);
3484                 }
3485         }
3486         return true;
3487 }
3488
3489 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3490 {
3491         std::string FullLine = ":" + prefix + " " + command;
3492         unsigned int words = params.size();
3493         for (unsigned int x = 0; x < words; x++)
3494         {
3495                 FullLine = FullLine + " " + params[x];
3496         }
3497         unsigned int items = TreeRoot->ChildCount();
3498         for (unsigned int x = 0; x < items; x++)
3499         {
3500                 TreeServer* Route = TreeRoot->GetChild(x);
3501                 if (Route && Route->GetSocket())
3502                 {
3503                         TreeSocket* Sock = Route->GetSocket();
3504                         if (Sock)
3505                                 Sock->WriteLine(FullLine);
3506                 }
3507         }
3508         return true;
3509 }
3510
3511 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3512 {
3513         std::string spfx = prefix;
3514         std::string scmd = command;
3515         return DoOneToMany(spfx, scmd, params);
3516 }
3517
3518 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3519 {
3520         std::string spfx = prefix;
3521         std::string scmd = command;
3522         return DoOneToAllButSender(spfx, scmd, params, omit);
3523 }
3524
3525 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3526 {
3527         TreeServer* Route = BestRouteTo(target);
3528         if (Route)
3529         {
3530                 std::string FullLine = ":" + prefix + " " + command;
3531                 unsigned int words = params.size();
3532                 for (unsigned int x = 0; x < words; x++)
3533                 {
3534                         FullLine = FullLine + " " + params[x];
3535                 }
3536                 if (Route && Route->GetSocket())
3537                 {
3538                         TreeSocket* Sock = Route->GetSocket();
3539                         if (Sock)
3540                                 Sock->WriteLine(FullLine);
3541                 }
3542                 return true;
3543         }
3544         else
3545         {
3546                 return false;
3547         }
3548 }
3549
3550 std::vector<TreeSocket*> Bindings;
3551
3552 void ReadConfiguration(bool rebind)
3553 {
3554         Conf = new ConfigReader(ServerInstance);
3555         if (rebind)
3556         {
3557                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3558                 {
3559                         std::string Type = Conf->ReadValue("bind","type",j);
3560                         std::string IP = Conf->ReadValue("bind","address",j);
3561                         long Port = Conf->ReadInteger("bind","port",j,true);
3562                         if (Type == "servers")
3563                         {
3564                                 if (IP == "*")
3565                                 {
3566                                         IP = "";
3567                                 }
3568                                 TreeSocket* listener = new TreeSocket(ServerInstance, IP.c_str(),Port,true,10);
3569                                 if (listener->GetState() == I_LISTENING)
3570                                 {
3571                                         Bindings.push_back(listener);
3572                                 }
3573                                 else
3574                                 {
3575                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3576                                         listener->Close();
3577                                         DELETE(listener);
3578                                 }
3579                         }
3580                 }
3581         }
3582         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3583         HideULines = Conf->ReadFlag("options","hideulines",0);
3584         LinkBlocks.clear();
3585         ValidIPs.clear();
3586         for (int j =0; j < Conf->Enumerate("link"); j++)
3587         {
3588                 Link L;
3589                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3590                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3591                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3592                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3593                 L.Port = Conf->ReadInteger("link","port",j,true);
3594                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3595                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3596                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3597                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3598                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3599                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3600                 /* Bugfix by brain, do not allow people to enter bad configurations */
3601                 if (L.Name != ServerInstance->Config->ServerName)
3602                 {
3603                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3604                         {
3605                                 ValidIPs.push_back(L.IPAddr);
3606
3607                                 if (Allow.length())
3608                                         ValidIPs.push_back(Allow);
3609
3610                                 /* Needs resolving */
3611                                 insp_inaddr binip;
3612                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3613                                 {
3614                                         try
3615                                         {
3616                                                 SecurityIPResolver* sr = new SecurityIPResolver(ServerInstance, L.IPAddr, L);
3617                                                 ServerInstance->AddResolver(sr);
3618                                         }
3619                                         catch (ModuleException& e)
3620                                         {
3621                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3622                                         }
3623                                 }
3624
3625                                 LinkBlocks.push_back(L);
3626                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3627                         }
3628                         else
3629                         {
3630                                 if (L.IPAddr == "")
3631                                 {
3632                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3633                                 }
3634                                 else if (L.RecvPass == "")
3635                                 {
3636                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3637                                 }
3638                                 else if (L.SendPass == "")
3639                                 {
3640                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3641                                 }
3642                                 else if (L.Name == "")
3643                                 {
3644                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3645                                 }
3646                                 else if (!L.Port)
3647                                 {
3648                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3649                                 }
3650                         }
3651                 }
3652                 else
3653                 {
3654                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3655                 }
3656         }
3657         DELETE(Conf);
3658 }
3659
3660
3661 class ModuleSpanningTree : public Module
3662 {
3663         std::vector<TreeSocket*> Bindings;
3664         int line;
3665         int NumServers;
3666         unsigned int max_local;
3667         unsigned int max_global;
3668         cmd_rconnect* command_rconnect;
3669
3670  public:
3671
3672         ModuleSpanningTree(InspIRCd* Me)
3673                 : Module::Module(Me), max_local(0), max_global(0)
3674         {
3675
3676                 Bindings.clear();
3677
3678                 ::ServerInstance = Me;
3679
3680                 // Create the root of the tree
3681                 TreeRoot = new TreeServer(ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3682
3683                 ReadConfiguration(true);
3684
3685                 command_rconnect = new cmd_rconnect(ServerInstance, this);
3686                 ServerInstance->AddCommand(command_rconnect);
3687         }
3688
3689         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3690         {
3691                 std::string Parent = TreeRoot->GetName();
3692                 if (Current->GetParent())
3693                 {
3694                         Parent = Current->GetParent()->GetName();
3695                 }
3696                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3697                 {
3698                         if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3699                         {
3700                                 if (*user->oper)
3701                                 {
3702                                          ShowLinks(Current->GetChild(q),user,hops+1);
3703                                 }
3704                         }
3705                         else
3706                         {
3707                                 ShowLinks(Current->GetChild(q),user,hops+1);
3708                         }
3709                 }
3710                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3711                 if ((HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3712                         return;
3713                 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());
3714         }
3715
3716         int CountLocalServs()
3717         {
3718                 return TreeRoot->ChildCount();
3719         }
3720
3721         int CountServs()
3722         {
3723                 return serverlist.size();
3724         }
3725
3726         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3727         {
3728                 ShowLinks(TreeRoot,user,0);
3729                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3730                 return;
3731         }
3732
3733         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3734         {
3735                 unsigned int n_users = ServerInstance->UserCount();
3736
3737                 /* Only update these when someone wants to see them, more efficient */
3738                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3739                         max_local = ServerInstance->LocalUserCount();
3740                 if (n_users > max_global)
3741                         max_global = n_users;
3742
3743                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3744                 if (ServerInstance->OperCount())
3745                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3746                 if (ServerInstance->UnregisteredUserCount())
3747                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3748                 if (ServerInstance->ChannelCount())
3749                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3750                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3751                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3752                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3753                 return;
3754         }
3755
3756         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3757
3758         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3759         {
3760                 if (line < 128)
3761                 {
3762                         for (int t = 0; t < depth; t++)
3763                         {
3764                                 matrix[line][t] = ' ';
3765                         }
3766
3767                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3768                         // a 'Spacer' String to compensate.
3769                         char spacer[40];
3770
3771                         memset(spacer,' ',40);
3772                         if ((40 - Current->GetName().length() - depth) > 1) {
3773                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3774                         }
3775                         else
3776                         {
3777                                 spacer[5] = '\0';
3778                         }
3779
3780                         float percent;
3781                         char text[80];
3782                         if (ServerInstance->clientlist.size() == 0) {
3783                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3784                                 percent = 0;
3785                         }
3786                         else
3787                         {
3788                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3789                         }
3790                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3791                         totusers += Current->GetUserCount();
3792                         totservers++;
3793                         strlcpy(&matrix[line][depth],text,80);
3794                         line++;
3795                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3796                         {
3797                                 if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3798                                 {
3799                                         if (*user->oper)
3800                                         {
3801                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3802                                         }
3803                                 }
3804                                 else
3805                                 {
3806                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3807                                 }
3808                         }
3809                 }
3810         }
3811
3812         int HandleMotd(const char** parameters, int pcnt, userrec* user)
3813         {
3814                 if (pcnt > 0)
3815                 {
3816                         /* Remote MOTD, the server is within the 1st parameter */
3817                         std::deque<std::string> params;
3818                         params.push_back(parameters[0]);
3819
3820                         /* Send it out remotely, generate no reply yet */
3821                         TreeServer* s = FindServerMask(parameters[0]);
3822                         if (s)
3823                         {
3824                                 DoOneToOne(user->nick, "MOTD", params, s->GetName());
3825                         }
3826                         else
3827                         {
3828                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3829                         }
3830                         return 1;
3831                 }
3832                 return 0;
3833         }
3834
3835         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
3836         {
3837                 if (pcnt > 0)
3838                 {
3839                         /* Remote ADMIN, the server is within the 1st parameter */
3840                         std::deque<std::string> params;
3841                         params.push_back(parameters[0]);
3842
3843                         /* Send it out remotely, generate no reply yet */
3844                         TreeServer* s = FindServerMask(parameters[0]);
3845                         if (s)
3846                         {
3847                                 DoOneToOne(user->nick, "ADMIN", params, s->GetName());
3848                         }
3849                         else
3850                         {
3851                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3852                         }
3853                         return 1;
3854                 }
3855                 return 0;
3856         }
3857
3858         int HandleStats(const char** parameters, int pcnt, userrec* user)
3859         {
3860                 if (pcnt > 1)
3861                 {
3862                         /* Remote STATS, the server is within the 2nd parameter */
3863                         std::deque<std::string> params;
3864                         params.push_back(parameters[0]);
3865                         params.push_back(parameters[1]);
3866                         /* Send it out remotely, generate no reply yet */
3867                         TreeServer* s = FindServerMask(parameters[1]);
3868                         if (s)
3869                         {
3870                                 params[1] = s->GetName();
3871                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
3872                         }
3873                         else
3874                         {
3875                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3876                         }
3877                         return 1;
3878                 }
3879                 return 0;
3880         }
3881
3882         // Ok, prepare to be confused.
3883         // After much mulling over how to approach this, it struck me that
3884         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3885         // keeping track of a ton of ascii characters, and line by line
3886         // under recursion working out where to place them using multiplications
3887         // and divisons, we instead render the map onto a backplane of characters
3888         // (a character matrix), then draw the branches as a series of "L" shapes
3889         // from the nodes. This is not only friendlier on CPU it uses less stack.
3890
3891         void HandleMap(const char** parameters, int pcnt, userrec* user)
3892         {
3893                 // This array represents a virtual screen which we will
3894                 // "scratch" draw to, as the console device of an irc
3895                 // client does not provide for a proper terminal.
3896                 float totusers = 0;
3897                 float totservers = 0;
3898                 char matrix[128][80];
3899                 for (unsigned int t = 0; t < 128; t++)
3900                 {
3901                         matrix[t][0] = '\0';
3902                 }
3903                 line = 0;
3904                 // The only recursive bit is called here.
3905                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3906                 // Process each line one by one. The algorithm has a limit of
3907                 // 128 servers (which is far more than a spanning tree should have
3908                 // anyway, so we're ok). This limit can be raised simply by making
3909                 // the character matrix deeper, 128 rows taking 10k of memory.
3910                 for (int l = 1; l < line; l++)
3911                 {
3912                         // scan across the line looking for the start of the
3913                         // servername (the recursive part of the algorithm has placed
3914                         // the servers at indented positions depending on what they
3915                         // are related to)
3916                         int first_nonspace = 0;
3917                         while (matrix[l][first_nonspace] == ' ')
3918                         {
3919                                 first_nonspace++;
3920                         }
3921                         first_nonspace--;
3922                         // Draw the `- (corner) section: this may be overwritten by
3923                         // another L shape passing along the same vertical pane, becoming
3924                         // a |- (branch) section instead.
3925                         matrix[l][first_nonspace] = '-';
3926                         matrix[l][first_nonspace-1] = '`';
3927                         int l2 = l - 1;
3928                         // Draw upwards until we hit the parent server, causing possibly
3929                         // other corners (`-) to become branches (|-)
3930                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3931                         {
3932                                 matrix[l2][first_nonspace-1] = '|';
3933                                 l2--;
3934                         }
3935                 }
3936                 // dump the whole lot to the user. This is the easy bit, honest.
3937                 for (int t = 0; t < line; t++)
3938                 {
3939                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
3940                 }
3941                 float avg_users = totusers / totservers;
3942                 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);
3943         user->WriteServ("007 %s :End of /MAP",user->nick);
3944                 return;
3945         }
3946
3947         int HandleSquit(const char** parameters, int pcnt, userrec* user)
3948         {
3949                 TreeServer* s = FindServerMask(parameters[0]);
3950                 if (s)
3951                 {
3952                         if (s == TreeRoot)
3953                         {
3954                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
3955                                 return 1;
3956                         }
3957                         TreeSocket* sock = s->GetSocket();
3958                         if (sock)
3959                         {
3960                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
3961                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
3962                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
3963                                 ServerInstance->SE->DelFd(sock);
3964                                 sock->Close();
3965                                 delete sock;
3966                         }
3967                         else
3968                         {
3969                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
3970                         }
3971                 }
3972                 else
3973                 {
3974                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
3975                 }
3976                 return 1;
3977         }
3978
3979         int HandleTime(const char** parameters, int pcnt, userrec* user)
3980         {
3981                 if ((IS_LOCAL(user)) && (pcnt))
3982                 {
3983                         TreeServer* found = FindServerMask(parameters[0]);
3984                         if (found)
3985                         {
3986                                 // we dont' override for local server
3987                                 if (found == TreeRoot)
3988                                         return 0;
3989
3990                                 std::deque<std::string> params;
3991                                 params.push_back(found->GetName());
3992                                 params.push_back(user->nick);
3993                                 DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
3994                         }
3995                         else
3996                         {
3997                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
3998                         }
3999                 }
4000                 return 1;
4001         }
4002
4003         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4004         {
4005                 if ((IS_LOCAL(user)) && (pcnt > 1))
4006                 {
4007                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4008                         if ((remote) && (remote->GetFd() < 0))
4009                         {
4010                                 std::deque<std::string> params;
4011                                 params.push_back(parameters[1]);
4012                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
4013                                 return 1;
4014                         }
4015                         else if (!remote)
4016                         {
4017                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4018                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4019                                 return 1;
4020                         }
4021                 }
4022                 return 0;
4023         }
4024
4025         void DoPingChecks(time_t curtime)
4026         {
4027                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
4028                 {
4029                         TreeServer* serv = TreeRoot->GetChild(j);
4030                         TreeSocket* sock = serv->GetSocket();
4031                         if (sock)
4032                         {
4033                                 if (curtime >= serv->NextPingTime())
4034                                 {
4035                                         if (serv->AnsweredLastPing())
4036                                         {
4037                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4038                                                 serv->SetNextPingTime(curtime + 60);
4039                                         }
4040                                         else
4041                                         {
4042                                                 // they didnt answer, boot them
4043                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4044                                                 sock->Squit(serv,"Ping timeout");
4045                                                 ServerInstance->SE->DelFd(sock);
4046                                                 sock->Close();
4047                                                 delete sock;
4048                                                 return;
4049                                         }
4050                                 }
4051                         }
4052                 }
4053         }
4054
4055         void ConnectServer(Link* x)
4056         {
4057                 insp_inaddr binip;
4058
4059                 /* Do we already have an IP? If so, no need to resolve it. */
4060                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4061                 {
4062                         TreeSocket* newsocket = new TreeSocket(ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4063                         if (newsocket->GetFd() > -1)
4064                         {
4065                                 /* Handled automatically on success */
4066                         }
4067                         else
4068                         {
4069                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4070                                 delete newsocket;
4071                                 this->DoFailOver(x);
4072                         }
4073                 }
4074                 else
4075                 {
4076                         try
4077                         {
4078                                 ServernameResolver* snr = new ServernameResolver(ServerInstance,x->IPAddr, *x);
4079                                 ServerInstance->AddResolver(snr);
4080                         }
4081                         catch (ModuleException& e)
4082                         {
4083                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4084                                 this->DoFailOver(x);
4085                         }
4086                 }
4087         }
4088
4089         void DoFailOver(Link* x)
4090         {
4091                 if (x->FailOver.length())
4092                 {
4093                         if (x->FailOver == x->Name)
4094                         {
4095                                 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());
4096                                 return;
4097                         }
4098                         Link* TryThisOne = this->FindLink(x->FailOver.c_str());
4099                         if (TryThisOne)
4100                         {
4101                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
4102                                 ConnectServer(TryThisOne);
4103                         }
4104                         else
4105                         {
4106                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
4107                         }
4108                 }
4109         }
4110
4111         Link* FindLink(const std::string& name)
4112         {
4113                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4114                 {
4115                         if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
4116                         {
4117                                 return &(*x);
4118                         }
4119                 }
4120                 return NULL;
4121         }
4122
4123         void AutoConnectServers(time_t curtime)
4124         {
4125                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4126                 {
4127                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4128                         {
4129                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4130                                 x->NextConnectTime = curtime + x->AutoConnect;
4131                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4132                                 if (x->FailOver.length())
4133                                 {
4134                                         TreeServer* CheckFailOver = FindServer(x->FailOver.c_str());
4135                                         if (CheckFailOver)
4136                                         {
4137                                                 /* The failover for this server is currently a member of the network.
4138                                                  * The failover probably succeeded, where the main link did not.
4139                                                  * Don't try the main link until the failover is gone again.
4140                                                  */
4141                                                 continue;
4142                                         }
4143                                 }
4144                                 if (!CheckDupe)
4145                                 {
4146                                         // an autoconnected server is not connected. Check if its time to connect it
4147                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4148                                         this->ConnectServer(&(*x));
4149                                 }
4150                         }
4151                 }
4152         }
4153
4154         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4155         {
4156                 // we've already checked if pcnt > 0, so this is safe
4157                 TreeServer* found = FindServerMask(parameters[0]);
4158                 if (found)
4159                 {
4160                         std::string Version = found->GetVersion();
4161                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4162                         if (found == TreeRoot)
4163                         {
4164                                 std::stringstream out(ServerInstance->Config->data005);
4165                                 std::string token = "";
4166                                 std::string line5 = "";
4167                                 int token_counter = 0;
4168
4169                                 while (!out.eof())
4170                                 {
4171                                         out >> token;
4172                                         line5 = line5 + token + " ";
4173                                         token_counter++;
4174
4175                                         if ((token_counter >= 13) || (out.eof() == true))
4176                                         {
4177                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4178                                                 line5 = "";
4179                                                 token_counter = 0;
4180                                         }
4181                                 }
4182                         }
4183                 }
4184                 else
4185                 {
4186                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4187                 }
4188                 return 1;
4189         }
4190
4191         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4192         {
4193                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4194                 {
4195                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4196                         {
4197                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4198                                 if (!CheckDupe)
4199                                 {
4200                                         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);
4201                                         ConnectServer(&(*x));
4202                                         return 1;
4203                                 }
4204                                 else
4205                                 {
4206                                         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());
4207                                         return 1;
4208                                 }
4209                         }
4210                 }
4211                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4212                 return 1;
4213         }
4214
4215         virtual int OnStats(char statschar, userrec* user, string_list &results)
4216         {
4217                 if (statschar == 'c')
4218                 {
4219                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
4220                         {
4221                                 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');
4222                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
4223                         }
4224                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4225                         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);
4226                         return 1;
4227                 }
4228                 return 0;
4229         }
4230
4231         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated)
4232         {
4233                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4234                 if (!validated)
4235                         return 0;
4236
4237                 if (command == "CONNECT")
4238                 {
4239                         return this->HandleConnect(parameters,pcnt,user);
4240                 }
4241                 else if (command == "STATS")
4242                 {
4243                         return this->HandleStats(parameters,pcnt,user);
4244                 }
4245                 else if (command == "MOTD")
4246                 {
4247                         return this->HandleMotd(parameters,pcnt,user);
4248                 }
4249                 else if (command == "ADMIN")
4250                 {
4251                         return this->HandleAdmin(parameters,pcnt,user);
4252                 }
4253                 else if (command == "SQUIT")
4254                 {
4255                         return this->HandleSquit(parameters,pcnt,user);
4256                 }
4257                 else if (command == "MAP")
4258                 {
4259                         this->HandleMap(parameters,pcnt,user);
4260                         return 1;
4261                 }
4262                 else if ((command == "TIME") && (pcnt > 0))
4263                 {
4264                         return this->HandleTime(parameters,pcnt,user);
4265                 }
4266                 else if (command == "LUSERS")
4267                 {
4268                         this->HandleLusers(parameters,pcnt,user);
4269                         return 1;
4270                 }
4271                 else if (command == "LINKS")
4272                 {
4273                         this->HandleLinks(parameters,pcnt,user);
4274                         return 1;
4275                 }
4276                 else if (command == "WHOIS")
4277                 {
4278                         if (pcnt > 1)
4279                         {
4280                                 // remote whois
4281                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4282                         }
4283                 }
4284                 else if ((command == "VERSION") && (pcnt > 0))
4285                 {
4286                         this->HandleVersion(parameters,pcnt,user);
4287                         return 1;
4288                 }
4289
4290                 return 0;
4291         }
4292
4293         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result)
4294         {
4295                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4296                 {
4297                         // this bit of code cleverly routes all module commands
4298                         // to all remote severs *automatically* so that modules
4299                         // can just handle commands locally, without having
4300                         // to have any special provision in place for remote
4301                         // commands and linking protocols.
4302                         std::deque<std::string> params;
4303                         params.clear();
4304                         for (int j = 0; j < pcnt; j++)
4305                         {
4306                                 if (strchr(parameters[j],' '))
4307                                 {
4308                                         params.push_back(":" + std::string(parameters[j]));
4309                                 }
4310                                 else
4311                                 {
4312                                         params.push_back(std::string(parameters[j]));
4313                                 }
4314                         }
4315                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4316                         DoOneToMany(user->nick,command,params);
4317                 }
4318         }
4319
4320         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4321         {
4322                 TreeServer* s = FindServer(servername);
4323                 if (s)
4324                 {
4325                         description = s->GetDesc();
4326                 }
4327         }
4328
4329         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4330         {
4331                 if (IS_LOCAL(source))
4332                 {
4333                         std::deque<std::string> params;
4334                         params.push_back(dest->nick);
4335                         params.push_back(channel->name);
4336                         DoOneToMany(source->nick,"INVITE",params);
4337                 }
4338         }
4339
4340         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4341         {
4342                 std::deque<std::string> params;
4343                 params.push_back(chan->name);
4344                 params.push_back(":"+topic);
4345                 DoOneToMany(user->nick,"TOPIC",params);
4346         }
4347
4348         virtual void OnWallops(userrec* user, const std::string &text)
4349         {
4350                 if (IS_LOCAL(user))
4351                 {
4352                         std::deque<std::string> params;
4353                         params.push_back(":"+text);
4354                         DoOneToMany(user->nick,"WALLOPS",params);
4355                 }
4356         }
4357
4358         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4359         {
4360                 if (target_type == TYPE_USER)
4361                 {
4362                         userrec* d = (userrec*)dest;
4363                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4364                         {
4365                                 std::deque<std::string> params;
4366                                 params.clear();
4367                                 params.push_back(d->nick);
4368                                 params.push_back(":"+text);
4369                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4370                         }
4371                 }
4372                 else if (target_type == TYPE_CHANNEL)
4373                 {
4374                         if (IS_LOCAL(user))
4375                         {
4376                                 chanrec *c = (chanrec*)dest;
4377                                 if (c)
4378                                 {
4379                                         std::string cname = c->name;
4380                                         if (status)
4381                                                 cname = status + cname;
4382                                         std::deque<TreeServer*> list;
4383                                         GetListOfServersForChannel(c,list);
4384                                         unsigned int ucount = list.size();
4385                                         for (unsigned int i = 0; i < ucount; i++)
4386                                         {
4387                                                 TreeSocket* Sock = list[i]->GetSocket();
4388                                                 if (Sock)
4389                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4390                                         }
4391                                 }
4392                         }
4393                 }
4394                 else if (target_type == TYPE_SERVER)
4395                 {
4396                         if (IS_LOCAL(user))
4397                         {
4398                                 char* target = (char*)dest;
4399                                 std::deque<std::string> par;
4400                                 par.push_back(target);
4401                                 par.push_back(":"+text);
4402                                 DoOneToMany(user->nick,"NOTICE",par);
4403                         }
4404                 }
4405         }
4406
4407         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4408         {
4409                 if (target_type == TYPE_USER)
4410                 {
4411                         // route private messages which are targetted at clients only to the server
4412                         // which needs to receive them
4413                         userrec* d = (userrec*)dest;
4414                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4415                         {
4416                                 std::deque<std::string> params;
4417                                 params.clear();
4418                                 params.push_back(d->nick);
4419                                 params.push_back(":"+text);
4420                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4421                         }
4422                 }
4423                 else if (target_type == TYPE_CHANNEL)
4424                 {
4425                         if (IS_LOCAL(user))
4426                         {
4427                                 chanrec *c = (chanrec*)dest;
4428                                 if (c)
4429                                 {
4430                                         std::string cname = c->name;
4431                                         if (status)
4432                                                 cname = status + cname;
4433                                         std::deque<TreeServer*> list;
4434                                         GetListOfServersForChannel(c,list);
4435                                         unsigned int ucount = list.size();
4436                                         for (unsigned int i = 0; i < ucount; i++)
4437                                         {
4438                                                 TreeSocket* Sock = list[i]->GetSocket();
4439                                                 if (Sock)
4440                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4441                                         }
4442                                 }
4443                         }
4444                 }
4445                 else if (target_type == TYPE_SERVER)
4446                 {
4447                         if (IS_LOCAL(user))
4448                         {
4449                                 char* target = (char*)dest;
4450                                 std::deque<std::string> par;
4451                                 par.push_back(target);
4452                                 par.push_back(":"+text);
4453                                 DoOneToMany(user->nick,"PRIVMSG",par);
4454                         }
4455                 }
4456         }
4457
4458         virtual void OnBackgroundTimer(time_t curtime)
4459         {
4460                 AutoConnectServers(curtime);
4461                 DoPingChecks(curtime);
4462         }
4463
4464         virtual void OnUserJoin(userrec* user, chanrec* channel)
4465         {
4466                 // Only do this for local users
4467                 if (IS_LOCAL(user))
4468                 {
4469                         char ts[24];
4470                         snprintf(ts,24,"%lu",(unsigned long)channel->age);
4471
4472                         std::deque<std::string> params;
4473                         params.clear();
4474                         params.push_back(channel->name);
4475
4476                         /** XXX: The client protocol will IGNORE this parameter.
4477                          * We could make use of it if we wanted to keep the TS
4478                          * in step if somehow we lose it.
4479                          */
4480                         params.push_back(ts);
4481
4482                         if (channel->GetUserCounter() > 1)
4483                         {
4484                                 // not the first in the channel
4485                                 DoOneToMany(user->nick,"JOIN",params);
4486                         }
4487                         else
4488                         {
4489                                 // first in the channel, set up their permissions
4490                                 // and the channel TS with FJOIN.
4491                                 params.clear();
4492                                 params.push_back(channel->name);
4493                                 params.push_back(ts);
4494                                 params.push_back("@,"+std::string(user->nick));
4495                                 DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4496                         }
4497                 }
4498         }
4499
4500         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4501         {
4502                 // only occurs for local clients
4503                 if (user->registered != REG_ALL)
4504                         return;
4505                 std::deque<std::string> params;
4506                 params.push_back(newhost);
4507                 DoOneToMany(user->nick,"FHOST",params);
4508         }
4509
4510         virtual void OnChangeName(userrec* user, const std::string &gecos)
4511         {
4512                 // only occurs for local clients
4513                 if (user->registered != REG_ALL)
4514                         return;
4515                 std::deque<std::string> params;
4516                 params.push_back(gecos);
4517                 DoOneToMany(user->nick,"FNAME",params);
4518         }
4519
4520         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4521         {
4522                 if (IS_LOCAL(user))
4523                 {
4524                         std::deque<std::string> params;
4525                         params.push_back(channel->name);
4526                         if (partmessage != "")
4527                                 params.push_back(":"+partmessage);
4528                         DoOneToMany(user->nick,"PART",params);
4529                 }
4530         }
4531
4532         virtual void OnUserConnect(userrec* user)
4533         {
4534                 char agestr[MAXBUF];
4535                 if (IS_LOCAL(user))
4536                 {
4537                         std::deque<std::string> params;
4538                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4539                         params.push_back(agestr);
4540                         params.push_back(user->nick);
4541                         params.push_back(user->host);
4542                         params.push_back(user->dhost);
4543                         params.push_back(user->ident);
4544                         params.push_back("+"+std::string(user->FormatModes()));
4545                         params.push_back(user->GetIPString());
4546                         params.push_back(":"+std::string(user->fullname));
4547                         DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4548
4549                         // User is Local, change needs to be reflected!
4550                         TreeServer* SourceServer = FindServer(user->server);
4551                         if (SourceServer)
4552                         {
4553                                 SourceServer->AddUserCount();
4554                         }
4555
4556                 }
4557         }
4558
4559         virtual void OnUserQuit(userrec* user, const std::string &reason)
4560         {
4561                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4562                 {
4563                         std::deque<std::string> params;
4564                         params.push_back(":"+reason);
4565                         DoOneToMany(user->nick,"QUIT",params);
4566                 }
4567                 // Regardless, We need to modify the user Counts..
4568                 TreeServer* SourceServer = FindServer(user->server);
4569                 if (SourceServer)
4570                 {
4571                         SourceServer->DelUserCount();
4572                 }
4573
4574         }
4575
4576         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4577         {
4578                 if (IS_LOCAL(user))
4579                 {
4580                         std::deque<std::string> params;
4581                         params.push_back(user->nick);
4582                         DoOneToMany(oldnick,"NICK",params);
4583                 }
4584         }
4585
4586         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4587         {
4588                 if ((source) && (IS_LOCAL(source)))
4589                 {
4590                         std::deque<std::string> params;
4591                         params.push_back(chan->name);
4592                         params.push_back(user->nick);
4593                         params.push_back(":"+reason);
4594                         DoOneToMany(source->nick,"KICK",params);
4595                 }
4596                 else if (!source)
4597                 {
4598                         std::deque<std::string> params;
4599                         params.push_back(chan->name);
4600                         params.push_back(user->nick);
4601                         params.push_back(":"+reason);
4602                         DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4603                 }
4604         }
4605
4606         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4607         {
4608                 std::deque<std::string> params;
4609                 params.push_back(dest->nick);
4610                 params.push_back(":"+reason);
4611                 DoOneToMany(source->nick,"KILL",params);
4612         }
4613
4614         virtual void OnRehash(const std::string &parameter)
4615         {
4616                 if (parameter != "")
4617                 {
4618                         std::deque<std::string> params;
4619                         params.push_back(parameter);
4620                         DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4621                         // check for self
4622                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4623                         {
4624                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4625                                 ServerInstance->RehashServer();
4626                         }
4627                 }
4628                 ReadConfiguration(false);
4629         }
4630
4631         // note: the protocol does not allow direct umode +o except
4632         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4633         // locally.
4634         virtual void OnOper(userrec* user, const std::string &opertype)
4635         {
4636                 if (IS_LOCAL(user))
4637                 {
4638                         std::deque<std::string> params;
4639                         params.push_back(opertype);
4640                         DoOneToMany(user->nick,"OPERTYPE",params);
4641                 }
4642         }
4643
4644         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4645         {
4646                 if (IS_LOCAL(source))
4647                 {
4648                         char type[8];
4649                         snprintf(type,8,"%cLINE",linetype);
4650                         std::string stype = type;
4651                         if (adding)
4652                         {
4653                                 char sduration[MAXBUF];
4654                                 snprintf(sduration,MAXBUF,"%ld",duration);
4655                                 std::deque<std::string> params;
4656                                 params.push_back(host);
4657                                 params.push_back(sduration);
4658                                 params.push_back(":"+reason);
4659                                 DoOneToMany(source->nick,stype,params);
4660                         }
4661                         else
4662                         {
4663                                 std::deque<std::string> params;
4664                                 params.push_back(host);
4665                                 DoOneToMany(source->nick,stype,params);
4666                         }
4667                 }
4668         }
4669
4670         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4671         {
4672                 OnLine(source,hostmask,true,'G',duration,reason);
4673         }
4674
4675         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4676         {
4677                 OnLine(source,ipmask,true,'Z',duration,reason);
4678         }
4679
4680         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4681         {
4682                 OnLine(source,nickmask,true,'Q',duration,reason);
4683         }
4684
4685         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4686         {
4687                 OnLine(source,hostmask,true,'E',duration,reason);
4688         }
4689
4690         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4691         {
4692                 OnLine(source,hostmask,false,'G',0,"");
4693         }
4694
4695         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4696         {
4697                 OnLine(source,ipmask,false,'Z',0,"");
4698         }
4699
4700         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4701         {
4702                 OnLine(source,nickmask,false,'Q',0,"");
4703         }
4704
4705         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4706         {
4707                 OnLine(source,hostmask,false,'E',0,"");
4708         }
4709
4710         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4711         {
4712                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4713                 {
4714                         if (target_type == TYPE_USER)
4715                         {
4716                                 userrec* u = (userrec*)dest;
4717                                 std::deque<std::string> params;
4718                                 params.push_back(u->nick);
4719                                 params.push_back(text);
4720                                 DoOneToMany(user->nick,"MODE",params);
4721                         }
4722                         else
4723                         {
4724                                 chanrec* c = (chanrec*)dest;
4725                                 std::deque<std::string> params;
4726                                 params.push_back(c->name);
4727                                 params.push_back(text);
4728                                 DoOneToMany(user->nick,"MODE",params);
4729                         }
4730                 }
4731         }
4732
4733         virtual void OnSetAway(userrec* user)
4734         {
4735                 if (IS_LOCAL(user))
4736                 {
4737                         std::deque<std::string> params;
4738                         params.push_back(":"+std::string(user->awaymsg));
4739                         DoOneToMany(user->nick,"AWAY",params);
4740                 }
4741         }
4742
4743         virtual void OnCancelAway(userrec* user)
4744         {
4745                 if (IS_LOCAL(user))
4746                 {
4747                         std::deque<std::string> params;
4748                         params.clear();
4749                         DoOneToMany(user->nick,"AWAY",params);
4750                 }
4751         }
4752
4753         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4754         {
4755                 TreeSocket* s = (TreeSocket*)opaque;
4756                 if (target)
4757                 {
4758                         if (target_type == TYPE_USER)
4759                         {
4760                                 userrec* u = (userrec*)target;
4761                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4762                         }
4763                         else
4764                         {
4765                                 chanrec* c = (chanrec*)target;
4766                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4767                         }
4768                 }
4769         }
4770
4771         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4772         {
4773                 TreeSocket* s = (TreeSocket*)opaque;
4774                 if (target)
4775                 {
4776                         if (target_type == TYPE_USER)
4777                         {
4778                                 userrec* u = (userrec*)target;
4779                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4780                         }
4781                         else if (target_type == TYPE_OTHER)
4782                         {
4783                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4784                         }
4785                         else if (target_type == TYPE_CHANNEL)
4786                         {
4787                                 chanrec* c = (chanrec*)target;
4788                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4789                         }
4790                 }
4791         }
4792
4793         virtual void OnEvent(Event* event)
4794         {
4795                 if (event->GetEventID() == "send_metadata")
4796                 {
4797                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4798                         if (params->size() < 3)
4799                                 return;
4800                         (*params)[2] = ":" + (*params)[2];
4801                         DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4802                 }
4803                 else if (event->GetEventID() == "send_mode")
4804                 {
4805                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4806                         if (params->size() < 2)
4807                                 return;
4808                         // Insert the TS value of the object, either userrec or chanrec
4809                         time_t ourTS = 0;
4810                         userrec* a = ServerInstance->FindNick((*params)[0]);
4811                         if (a)
4812                         {
4813                                 ourTS = a->age;
4814                         }
4815                         else
4816                         {
4817                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4818                                 if (a)
4819                                 {
4820                                         ourTS = a->age;
4821                                 }
4822                         }
4823                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4824                         DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4825                 }
4826         }
4827
4828         virtual ~ModuleSpanningTree()
4829         {
4830         }
4831
4832         virtual Version GetVersion()
4833         {
4834                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
4835         }
4836
4837         void Implements(char* List)
4838         {
4839                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
4840                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
4841                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
4842                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
4843                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
4844                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
4845                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
4846         }
4847
4848         /* It is IMPORTANT that m_spanningtree is the last module in the chain
4849          * so that any activity it sees is FINAL, e.g. we arent going to send out
4850          * a NICK message before m_cloaking has finished putting the +x on the user,
4851          * etc etc.
4852          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
4853          * the module call queue.
4854          */
4855         Priority Prioritize()
4856         {
4857                 return PRIORITY_LAST;
4858         }
4859 };
4860
4861 void DoFailOver(Link* x)
4862 {
4863         TreeProtocolModule->DoFailOver(x);
4864 }
4865
4866 Link* FindLink(const std::string& name)
4867 {
4868         return TreeProtocolModule->FindLink(name);
4869 }
4870
4871 class ModuleSpanningTreeFactory : public ModuleFactory
4872 {
4873  public:
4874         ModuleSpanningTreeFactory()
4875         {
4876         }
4877
4878         ~ModuleSpanningTreeFactory()
4879         {
4880         }
4881
4882         virtual Module * CreateModule(InspIRCd* Me)
4883         {
4884                 TreeProtocolModule = new ModuleSpanningTree(Me);
4885                 return TreeProtocolModule;
4886         }
4887
4888 };
4889
4890
4891 extern "C" void * init_module( void )
4892 {
4893         return new ModuleSpanningTreeFactory;
4894 }