src/modules/m_spanningtree.cpp

   1 /*   +------------------------------------+
   2  *   | Inspire Internet Relay Chat Daemon |
   3  *   +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                     E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* $ModDesc: Povides a spanning tree server link protocol */
  18
  19 using namespace std;
  20
  21 #include "configreader.h"
  22 #include "users.h"
  23 #include "channels.h"
  24 #include "modules.h"
  25 #include "commands/cmd_whois.h"
  26 #include "commands/cmd_stats.h"
  27 #include "socket.h"
  28 #include "inspircd.h"
  29 #include "wildcard.h"
  30 #include "xline.h"
  31 #include "cull_list.h"
  32 #include "aes.h"
  33
  34 #define nspace __gnu_cxx
  35
  36
  37 /** If you make a change which breaks the protocol, increment this.
  38  * If you  completely change the protocol, completely change the number.
  39  */
  40 const long ProtocolVersion = 1101;
  41
  42 /*
  43  * The server list in InspIRCd is maintained as two structures
  44  * which hold the data in different ways. Most of the time, we
  45  * want to very quicky obtain three pieces of information:
  46  *
  47  * (1) The information on a server
  48  * (2) The information on the server we must send data through
  49  *     to actually REACH the server we're after
  50  * (3) Potentially, the child/parent objects of this server
  51  *
  52  * The InspIRCd spanning protocol provides easy access to these
  53  * by storing the data firstly in a recursive structure, where
  54  * each item references its parent item, and a dynamic list
  55  * of child items, and another structure which stores the items
  56  * hashed, linearly. This means that if we want to find a server
  57  * by name quickly, we can look it up in the hash, avoiding
  58  * any O(n) lookups. If however, during a split or sync, we want
  59  * to apply an operation to a server, and any of its child objects
  60  * we can resort to recursion to walk the tree structure.
  61  */
  62
  63 using irc::sockets::MatchCIDR;
  64
  65 class ModuleSpanningTree;
  66 static ModuleSpanningTree* TreeProtocolModule;
  67 static InspIRCd* ServerInstance;
  68
  69 /** Any socket can have one of five states at any one time.
  70  * The LISTENER state indicates a socket which is listening
  71  * for connections. It cannot receive data itself, only incoming
  72  * sockets.
  73  * The CONNECTING state indicates an outbound socket which is
  74  * waiting to be writeable.
  75  * The WAIT_AUTH_1 state indicates the socket is outbound and
  76  * has successfully connected, but has not yet sent and received
  77  * SERVER strings.
  78  * The WAIT_AUTH_2 state indicates that the socket is inbound
  79  * (allocated by a LISTENER) but has not yet sent and received
  80  * SERVER strings.
  81  * The CONNECTED state represents a fully authorized, fully
  82  * connected server.
  83  */
  84 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  85
  86 /* Foward declarations */
  87 class TreeServer;
  88 class TreeSocket;
  89
  90 /* This variable represents the root of the server tree
  91  * (for all intents and purposes, it's us)
  92  */
  93 TreeServer *TreeRoot;
  94
  95 /* This hash_map holds the hash equivalent of the server
  96  * tree, used for rapid linear lookups.
  97  */
  98 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
  99 server_hash serverlist;
 100
 101 typedef nspace::hash_map<std::string, userrec*> uid_hash;
 102 typedef nspace::hash_map<std::string, char*> sid_hash;
 103
 104 /* More forward declarations */
 105 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 106 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 107 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 108 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 109 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 110 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 111 void ReadConfiguration(bool rebind);
 112
 113 /* Flatten links and /MAP for non-opers */
 114 bool FlatLinks;
 115 /* Hide U-Lined servers in /MAP and /LINKS */
 116 bool HideULines;
 117
 118 std::vector<std::string> ValidIPs;
 119
 120 class UserManager : public classbase
 121 {
 122         uid_hash uids;
 123         sid_hash sids;
 124  public:
 125         UserManager()
 126         {
 127                 uids.clear();
 128                 sids.clear();
 129         }
 130
 131         std::string UserToUID(userrec* user)
 132         {
 133                 return "";
 134         }
 135
 136         std::string UIDToUser(const std::string &UID)
 137         {
 138                 return "";
 139         }
 140
 141         std::string CreateAndAdd(userrec* user)
 142         {
 143                 return "";
 144         }
 145
 146         std::string CreateAndAdd(const std::string &servername)
 147         {
 148                 return "";
 149         }
 150
 151         std::string ServerToSID(const std::string &servername)
 152         {
 153                 return "";
 154         }
 155
 156         std::string SIDToServer(const std::string &SID)
 157         {
 158                 return "";
 159         }
 160
 161         userrec* FindByID(const std::string &UID)
 162         {
 163                 return NULL;
 164         }
 165 };
 166
 167
 168 /** Each server in the tree is represented by one class of
 169  * type TreeServer. A locally connected TreeServer can
 170  * have a class of type TreeSocket associated with it, for
 171  * remote servers, the TreeSocket entry will be NULL.
 172  * Each server also maintains a pointer to its parent
 173  * (NULL if this server is ours, at the top of the tree)
 174  * and a pointer to its "Route" (see the comments in the
 175  * constructors below), and also a dynamic list of pointers
 176  * to its children which can be iterated recursively
 177  * if required. Creating or deleting objects of type
 178  i* TreeServer automatically maintains the hash_map of
 179  * TreeServer items, deleting and inserting them as they
 180  * are created and destroyed.
 181  */
 182 class TreeServer : public classbase
 183 {
 184         InspIRCd* ServerInstance;               /* Creator */
 185         TreeServer* Parent;                     /* Parent entry */
 186         TreeServer* Route;                      /* Route entry */
 187         std::vector<TreeServer*> Children;      /* List of child objects */
 188         irc::string ServerName;                 /* Server's name */
 189         std::string ServerDesc;                 /* Server's description */
 190         std::string VersionString;              /* Version string or empty string */
 191         int UserCount;                          /* Not used in this version */
 192         int OperCount;                          /* Not used in this version */
 193         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 194         time_t NextPing;                        /* After this time, the server should be PINGed*/
 195         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 196
 197  public:
 198
 199         /** We don't use this constructor. Its a dummy, and won't cause any insertion
 200          * of the TreeServer into the hash_map. See below for the two we DO use.
 201          */
 202         TreeServer(InspIRCd* Instance) : ServerInstance(Instance)
 203         {
 204                 Parent = NULL;
 205                 ServerName = "";
 206                 ServerDesc = "";
 207                 VersionString = "";
 208                 UserCount = OperCount = 0;
 209                 VersionString = ServerInstance->GetVersionString();
 210         }
 211
 212         /** We use this constructor only to create the 'root' item, TreeRoot, which
 213          * represents our own server. Therefore, it has no route, no parent, and
 214          * no socket associated with it. Its version string is our own local version.
 215          */
 216         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc)
 217         {
 218                 Parent = NULL;
 219                 VersionString = "";
 220                 UserCount = OperCount = 0;
 221                 VersionString = ServerInstance->GetVersionString();
 222                 Route = NULL;
 223                 Socket = NULL; /* Fix by brain */
 224                 AddHashEntry();
 225         }
 226
 227         /** When we create a new server, we call this constructor to initialize it.
 228          * This constructor initializes the server's Route and Parent, and sets up
 229          * its ping counters so that it will be pinged one minute from now.
 230          */
 231         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 232                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 233         {
 234                 VersionString = "";
 235                 UserCount = OperCount = 0;
 236                 this->SetNextPingTime(time(NULL) + 60);
 237                 this->SetPingFlag();
 238
 239                 /* find the 'route' for this server (e.g. the one directly connected
 240                  * to the local server, which we can use to reach it)
 241                  *
 242                  * In the following example, consider we have just added a TreeServer
 243                  * class for server G on our network, of which we are server A.
 244                  * To route traffic to G (marked with a *) we must send the data to
 245                  * B (marked with a +) so this algorithm initializes the 'Route'
 246                  * value to point at whichever server traffic must be routed through
 247                  * to get here. If we were to try this algorithm with server B,
 248                  * the Route pointer would point at its own object ('this').
 249                  *
 250                  *              A
 251                  *             / \
 252                  *          + B   C
 253                  *           / \   \
 254                  *          D   E   F
 255                  *         /         \
 256                  *      * G           H
 257                  *
 258                  * We only run this algorithm when a server is created, as
 259                  * the routes remain constant while ever the server exists, and
 260                  * do not need to be re-calculated.
 261                  */
 262
 263                 Route = Above;
 264                 if (Route == TreeRoot)
 265                 {
 266                         Route = this;
 267                 }
 268                 else
 269                 {
 270                         while (this->Route->GetParent() != TreeRoot)
 271                         {
 272                                 this->Route = Route->GetParent();
 273                         }
 274                 }
 275
 276                 /* Because recursive code is slow and takes a lot of resources,
 277                  * we store two representations of the server tree. The first
 278                  * is a recursive structure where each server references its
 279                  * children and its parent, which is used for netbursts and
 280                  * netsplits to dump the whole dataset to the other server,
 281                  * and the second is used for very fast lookups when routing
 282                  * messages and is instead a hash_map, where each item can
 283                  * be referenced by its server name. The AddHashEntry()
 284                  * call below automatically inserts each TreeServer class
 285                  * into the hash_map as it is created. There is a similar
 286                  * maintainance call in the destructor to tidy up deleted
 287                  * servers.
 288                  */
 289
 290                 this->AddHashEntry();
 291         }
 292
 293         int QuitUsers(const std::string &reason)
 294         {
 295                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 296                 const char* reason_s = reason.c_str();
 297                 std::vector<userrec*> time_to_die;
 298                 for (user_hash::iterator n = ServerInstance->clientlist.begin(); n != ServerInstance->clientlist.end(); n++)
 299                 {
 300                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 301                         {
 302                                 time_to_die.push_back(n->second);
 303                         }
 304                 }
 305                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 306                 {
 307                         userrec* a = (userrec*)*n;
 308                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 309                         if (!IS_LOCAL(a))
 310                                 userrec::QuitUser(ServerInstance,a,reason_s);
 311                 }
 312                 return time_to_die.size();
 313         }
 314
 315         /** This method is used to add the structure to the
 316          * hash_map for linear searches. It is only called
 317          * by the constructors.
 318          */
 319         void AddHashEntry()
 320         {
 321                 server_hash::iterator iter;
 322                 iter = serverlist.find(this->ServerName.c_str());
 323                 if (iter == serverlist.end())
 324                         serverlist[this->ServerName.c_str()] = this;
 325         }
 326
 327         /** This method removes the reference to this object
 328          * from the hash_map which is used for linear searches.
 329          * It is only called by the default destructor.
 330          */
 331         void DelHashEntry()
 332         {
 333                 server_hash::iterator iter;
 334                 iter = serverlist.find(this->ServerName.c_str());
 335                 if (iter != serverlist.end())
 336                         serverlist.erase(iter);
 337         }
 338
 339         /** These accessors etc should be pretty self-
 340          * explanitory.
 341          */
 342         TreeServer* GetRoute()
 343         {
 344                 return Route;
 345         }
 346
 347         std::string GetName()
 348         {
 349                 return ServerName.c_str();
 350         }
 351
 352         std::string GetDesc()
 353         {
 354                 return ServerDesc;
 355         }
 356
 357         std::string GetVersion()
 358         {
 359                 return VersionString;
 360         }
 361
 362         void SetNextPingTime(time_t t)
 363         {
 364                 this->NextPing = t;
 365                 LastPingWasGood = false;
 366         }
 367
 368         time_t NextPingTime()
 369         {
 370                 return NextPing;
 371         }
 372
 373         bool AnsweredLastPing()
 374         {
 375                 return LastPingWasGood;
 376         }
 377
 378         void SetPingFlag()
 379         {
 380                 LastPingWasGood = true;
 381         }
 382
 383         int GetUserCount()
 384         {
 385                 return UserCount;
 386         }
 387
 388         void AddUserCount()
 389         {
 390                 UserCount++;
 391         }
 392
 393         void DelUserCount()
 394         {
 395                 UserCount--;
 396         }
 397
 398         int GetOperCount()
 399         {
 400                 return OperCount;
 401         }
 402
 403         TreeSocket* GetSocket()
 404         {
 405                 return Socket;
 406         }
 407
 408         TreeServer* GetParent()
 409         {
 410                 return Parent;
 411         }
 412
 413         void SetVersion(std::string Version)
 414         {
 415                 VersionString = Version;
 416         }
 417
 418         unsigned int ChildCount()
 419         {
 420                 return Children.size();
 421         }
 422
 423         TreeServer* GetChild(unsigned int n)
 424         {
 425                 if (n < Children.size())
 426                 {
 427                         /* Make sure they  cant request
 428                          * an out-of-range object. After
 429                          * all we know what these programmer
 430                          * types are like *grin*.
 431                          */
 432                         return Children[n];
 433                 }
 434                 else
 435                 {
 436                         return NULL;
 437                 }
 438         }
 439
 440         void AddChild(TreeServer* Child)
 441         {
 442                 Children.push_back(Child);
 443         }
 444
 445         bool DelChild(TreeServer* Child)
 446         {
 447                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 448                 {
 449                         if (*a == Child)
 450                         {
 451                                 Children.erase(a);
 452                                 return true;
 453                         }
 454                 }
 455                 return false;
 456         }
 457
 458         /** Removes child nodes of this node, and of that node, etc etc.
 459          * This is used during netsplits to automatically tidy up the
 460          * server tree. It is slow, we don't use it for much else.
 461          */
 462         bool Tidy()
 463         {
 464                 bool stillchildren = true;
 465                 while (stillchildren)
 466                 {
 467                         stillchildren = false;
 468                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 469                         {
 470                                 TreeServer* s = (TreeServer*)*a;
 471                                 s->Tidy();
 472                                 Children.erase(a);
 473                                 DELETE(s);
 474                                 stillchildren = true;
 475                                 break;
 476                         }
 477                 }
 478                 return true;
 479         }
 480
 481         ~TreeServer()
 482         {
 483                 /* We'd better tidy up after ourselves, eh? */
 484                 this->DelHashEntry();
 485         }
 486 };
 487
 488 /** The Link class might as well be a struct,
 489  * but this is C++ and we don't believe in structs (!).
 490  * It holds the entire information of one <link>
 491  * tag from the main config file. We maintain a list
 492  * of them, and populate the list on rehash/load.
 493  */
 494 class Link : public classbase
 495 {
 496  public:
 497         irc::string Name;
 498         std::string IPAddr;
 499         int Port;
 500         std::string SendPass;
 501         std::string RecvPass;
 502         unsigned long AutoConnect;
 503         time_t NextConnectTime;
 504         std::string EncryptionKey;
 505         bool HiddenFromStats;
 506         irc::string FailOver;
 507 };
 508
 509 void DoFailOver(Link* x);
 510 Link* FindLink(const std::string& name);
 511
 512 /* The usual stuff for inspircd modules,
 513  * plus the vector of Link classes which we
 514  * use to store the <link> tags from the config
 515  * file.
 516  */
 517 ConfigReader *Conf;
 518 std::vector<Link> LinkBlocks;
 519
 520 /** Yay for fast searches!
 521  * This is hundreds of times faster than recursion
 522  * or even scanning a linked list, especially when
 523  * there are more than a few servers to deal with.
 524  * (read as: lots).
 525  */
 526 TreeServer* FindServer(std::string ServerName)
 527 {
 528         server_hash::iterator iter;
 529         iter = serverlist.find(ServerName.c_str());
 530         if (iter != serverlist.end())
 531         {
 532                 return iter->second;
 533         }
 534         else
 535         {
 536                 return NULL;
 537         }
 538 }
 539
 540 /** Returns the locally connected server we must route a
 541  * message through to reach server 'ServerName'. This
 542  * only applies to one-to-one and not one-to-many routing.
 543  * See the comments for the constructor of TreeServer
 544  * for more details.
 545  */
 546 TreeServer* BestRouteTo(std::string ServerName)
 547 {
 548         if (ServerName.c_str() == TreeRoot->GetName())
 549                 return NULL;
 550         TreeServer* Found = FindServer(ServerName);
 551         if (Found)
 552         {
 553                 return Found->GetRoute();
 554         }
 555         else
 556         {
 557                 return NULL;
 558         }
 559 }
 560
 561 /** Find the first server matching a given glob mask.
 562  * Theres no find-using-glob method of hash_map [awwww :-(]
 563  * so instead, we iterate over the list using an iterator
 564  * and match each one until we get a hit. Yes its slow,
 565  * deal with it.
 566  */
 567 TreeServer* FindServerMask(std::string ServerName)
 568 {
 569         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 570         {
 571                 if (match(i->first.c_str(),ServerName.c_str()))
 572                         return i->second;
 573         }
 574         return NULL;
 575 }
 576
 577 /* A convenient wrapper that returns true if a server exists */
 578 bool IsServer(std::string ServerName)
 579 {
 580         return (FindServer(ServerName) != NULL);
 581 }
 582
 583
 584 class cmd_rconnect : public command_t
 585 {
 586         Module* Creator;
 587  public:
 588         cmd_rconnect (InspIRCd* Instance, Module* Callback) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback)
 589         {
 590                 this->source = "m_spanningtree.so";
 591                 syntax = "<remote-server-mask> <servermask>";
 592         }
 593
 594         CmdResult Handle (const char** parameters, int pcnt, userrec *user)
 595         {
 596                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 597                 /* Is this aimed at our server? */
 598                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 599                 {
 600                         /* Yes, initiate the given connect */
 601                         ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 602                         const char* para[1];
 603                         para[0] = parameters[1];
 604                         std::string original_command = std::string("CONNECT ") + parameters[1];
 605                         Creator->OnPreCommand("CONNECT", para, 1, user, true, original_command);
 606
 607                         return CMD_SUCCESS;
 608                 }
 609
 610                 return CMD_FAILURE;
 611         }
 612 };
 613
 614
 615
 616 /** Every SERVER connection inbound or outbound is represented by
 617  * an object of type TreeSocket.
 618  * TreeSockets, being inherited from InspSocket, can be tied into
 619  * the core socket engine, and we cn therefore receive activity events
 620  * for them, just like activex objects on speed. (yes really, that
 621  * is a technical term!) Each of these which relates to a locally
 622  * connected server is assocated with it, by hooking it onto a
 623  * TreeSocket class using its constructor. In this way, we can
 624  * maintain a list of servers, some of which are directly connected,
 625  * some of which are not.
 626  */
 627 class TreeSocket : public InspSocket
 628 {
 629         std::string myhost;
 630         std::string in_buffer;
 631         ServerState LinkState;
 632         std::string InboundServerName;
 633         std::string InboundDescription;
 634         int num_lost_users;
 635         int num_lost_servers;
 636         time_t NextPing;
 637         bool LastPingWasGood;
 638         bool bursting;
 639         AES* ctx_in;
 640         AES* ctx_out;
 641         unsigned int keylength;
 642         std::string ModuleList;
 643         std::map<std::string,std::string> CapKeys;
 644
 645  public:
 646
 647         /** Because most of the I/O gubbins are encapsulated within
 648          * InspSocket, we just call the superclass constructor for
 649          * most of the action, and append a few of our own values
 650          * to it.
 651          */
 652         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime)
 653                 : InspSocket(SI, host, port, listening, maxtime)
 654         {
 655                 myhost = host;
 656                 this->LinkState = LISTENER;
 657                 this->ctx_in = NULL;
 658                 this->ctx_out = NULL;
 659         }
 660
 661         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 662                 : InspSocket(SI, host, port, listening, maxtime)
 663         {
 664                 myhost = ServerName;
 665                 this->LinkState = CONNECTING;
 666                 this->ctx_in = NULL;
 667                 this->ctx_out = NULL;
 668         }
 669
 670         /** When a listening socket gives us a new file descriptor,
 671          * we must associate it with a socket without creating a new
 672          * connection. This constructor is used for this purpose.
 673          */
 674         TreeSocket(InspIRCd* SI, int newfd, char* ip)
 675                 : InspSocket(SI, newfd, ip)
 676         {
 677                 this->LinkState = WAIT_AUTH_1;
 678                 this->ctx_in = NULL;
 679                 this->ctx_out = NULL;
 680                 this->SendCapabilities();
 681         }
 682
 683         ~TreeSocket()
 684         {
 685                 if (ctx_in)
 686                         DELETE(ctx_in);
 687                 if (ctx_out)
 688                         DELETE(ctx_out);
 689         }
 690
 691         void InitAES(std::string key,std::string SName)
 692         {
 693                 if (key == "")
 694                         return;
 695
 696                 ctx_in = new AES();
 697                 ctx_out = new AES();
 698                 Instance->Log(DEBUG,"Initialized AES key %s",key.c_str());
 699                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 700                 keylength = key.length();
 701                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 702                 {
 703                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 704                         Instance->Log(DEBUG,"Key length not 16, 24 or 32 characters!");
 705                 }
 706                 else
 707                 {
 708                         if (this->GetState() != I_ERROR)
 709                         {
 710                                 this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 711                                 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\
 712                                         \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 713                                 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\
 714                                         \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);
 715                         }
 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())+"] started.");
 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                         Instance->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                         Instance->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                                                                                 Instance->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                                 Instance->Log(DEBUG,"BOUNCE BACK: %s",(to_bounce+params_to_bounce).c_str());
1302                                 DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1303                         }
1304
1305                         if (to_keep.length())
1306                         {
1307                                 unsigned int n = 2;
1308                                 unsigned int q = 0;
1309                                 modelist[0] = params[0].c_str();
1310                                 modelist[1] = to_keep.c_str();
1311
1312                                 if (params_to_keep.size() > 0)
1313                                 {
1314                                         for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
1315                                         {
1316                                                 Instance->Log(DEBUG,"KEEP Item %d of %d: %s", q, params_to_keep.size(), params_to_keep[q].c_str());
1317                                                 modelist[n++] = params_to_keep[q].c_str();
1318                                         }
1319                                 }
1320
1321                                 if (smode)
1322                                 {
1323                                         Instance->Log(DEBUG,"Send mode");
1324                                         this->Instance->SendMode(modelist, n, who);
1325                                 }
1326                                 else
1327                                 {
1328                                         Instance->Log(DEBUG,"Send mode client");
1329                                         this->Instance->CallCommandHandler("MODE", modelist, n, who);
1330                                 }
1331
1332                                 /* HOT POTATO! PASS IT ON! */
1333                                 DoOneToAllButSender(source,"FMODE",params,sourceserv);
1334                         }
1335                 }
1336                 else
1337                 /* U-lined servers always win regardless of their TS */
1338                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1339                 {
1340                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1341                          * SHOULD accept it, if its clock is right.
1342                          *
1343                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1344                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1345                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1346                          *
1347                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1348                          * writing the code. It took me a while to come up with this solution.
1349                          *
1350                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1351                          */
1352
1353                         std::deque<std::string> newparams;      /* New parameter list we send back */
1354                         newparams.push_back(params[0]);         /* Target, user or channel */
1355                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1356                         newparams.push_back("");                /* This contains the mode string. For now
1357                                                                  * it's empty, we fill it below.
1358                                                                  */
1359
1360                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1361                          * set to avoid a desync here.
1362                          */
1363                         std::string modebounce = "";
1364                         bool adding = true;
1365                         unsigned int t = 3;
1366                         ModeHandler* mh = NULL;
1367                         char cur_change = 1;
1368                         char old_change = 0;
1369                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1370                         {
1371                                 /* Iterate over all mode chars in the sent set */
1372                                 switch (*x)
1373                                 {
1374                                         /* Adding or subtracting modes? */
1375                                         case '-':
1376                                                 adding = false;
1377                                         break;
1378                                         case '+':
1379                                                 adding = true;
1380                                         break;
1381                                         default:
1382                                                 /* Find the mode handler for this mode */
1383                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1384
1385                                                 /* Got a mode handler?
1386                                                  * This also prevents us bouncing modes we have no handler for.
1387                                                  */
1388                                                 if (mh)
1389                                                 {
1390                                                         ModePair ret;
1391                                                         std::string p = "";
1392
1393                                                         /* Does the mode require a parameter right now?
1394                                                          * If it does, fetch it if we can
1395                                                          */
1396                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1397                                                                 p = params[t++];
1398
1399                                                         /* Call the ModeSet method to determine if its set with the
1400                                                          * given parameter here or not.
1401                                                          */
1402                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1403
1404                                                         /* XXX: Really. Dont ask.
1405                                                          * Determine from if its set combined with what the current
1406                                                          * 'state' is (adding or not) as to wether we should 'invert'
1407                                                          * or 'reinforce' the mode change
1408                                                          */
1409                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1410
1411                                                         /* Quickly determine if we have 'flipped' from + to -,
1412                                                          * or - to +, to prevent unneccessary +/- chars in the
1413                                                          * output string that waste bandwidth
1414                                                          */
1415                                                         if (cur_change != old_change)
1416                                                                 modebounce += cur_change;
1417                                                         old_change = cur_change;
1418
1419                                                         /* Add the mode character to the output string */
1420                                                         modebounce += mh->GetModeChar();
1421
1422                                                         /* We got a parameter back from ModeHandler::ModeSet,
1423                                                          * are we supposed to be sending one out right now?
1424                                                          */
1425                                                         if (ret.second.length())
1426                                                         {
1427                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1428                                                                         /* Yes we're supposed to be sending out
1429                                                                          * the parameter. Make sure it goes
1430                                                                          */
1431                                                                         newparams.push_back(ret.second);
1432                                                         }
1433
1434                                                 }
1435                                         break;
1436                                 }
1437                         }
1438
1439                         /* Update the parameters for FMODE with the new 'bounced' string */
1440                         newparams[2] = modebounce;
1441                         /* Only send it back the way it came, no need to send it anywhere else */
1442                         DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1443                         Instance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1444                 }
1445                 else
1446                 {
1447                         Instance->Log(DEBUG,"Allow modes, TS lower for sender");
1448                         /* The server was ulined, but something iffy is up with the TS.
1449                          * Sound the alarm bells!
1450                          */
1451                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1452                         {
1453                                 this->Instance->WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",sourceserv.c_str(),params[0].c_str());
1454                         }
1455                         /* Allow the mode, route it to either server or user command handling */
1456                         if (smode)
1457                                 this->Instance->SendMode(modelist,n,who);
1458                         else
1459                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1460
1461                         /* HOT POTATO! PASS IT ON! */
1462                         DoOneToAllButSender(source,"FMODE",params,sourceserv);
1463                 }
1464                 /* Are we supposed to free the userrec? */
1465                 if (smode)
1466                         DELETE(who);
1467
1468                 return true;
1469         }
1470
1471         /** FTOPIC command */
1472         bool ForceTopic(std::string source, std::deque<std::string> &params)
1473         {
1474                 if (params.size() != 4)
1475                         return true;
1476                 time_t ts = atoi(params[1].c_str());
1477                 std::string nsource = source;
1478
1479                 chanrec* c = this->Instance->FindChan(params[0]);
1480                 if (c)
1481                 {
1482                         if ((ts >= c->topicset) || (!*c->topic))
1483                         {
1484                                 std::string oldtopic = c->topic;
1485                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1486                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1487                                 c->topicset = ts;
1488                                 /* if the topic text is the same as the current topic,
1489                                  * dont bother to send the TOPIC command out, just silently
1490                                  * update the set time and set nick.
1491                                  */
1492                                 if (oldtopic != params[3])
1493                                 {
1494                                         userrec* user = this->Instance->FindNick(source);
1495                                         if (!user)
1496                                         {
1497                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1498                                         }
1499                                         else
1500                                         {
1501                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1502                                                 nsource = user->server;
1503                                         }
1504                                         /* all done, send it on its way */
1505                                         params[3] = ":" + params[3];
1506                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
1507                                 }
1508                         }
1509
1510                 }
1511
1512                 return true;
1513         }
1514
1515         /** FJOIN, similar to unreal SJOIN */
1516         bool ForceJoin(std::string source, std::deque<std::string> &params)
1517         {
1518                 if (params.size() < 3)
1519                         return true;
1520
1521                 char first[MAXBUF];
1522                 char modestring[MAXBUF];
1523                 char* mode_users[127];
1524                 memset(&mode_users,0,sizeof(mode_users));
1525                 mode_users[0] = first;
1526                 mode_users[1] = modestring;
1527                 strcpy(modestring,"+");
1528                 unsigned int modectr = 2;
1529
1530                 userrec* who = NULL;
1531                 std::string channel = params[0];
1532                 time_t TS = atoi(params[1].c_str());
1533                 char* key = "";
1534
1535                 chanrec* chan = this->Instance->FindChan(channel);
1536                 if (chan)
1537                         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
1546                 if (chan)
1547                         ourTS = chan->age;
1548
1549                 /* XXX: PAY ATTENTION:
1550                  * In 1.1, if they have the newer channel, we immediately clear
1551                  * all status modes from our users. We then accept their modes.
1552                  * If WE have the newer channel its the other side's job to do this.
1553                  * Note that this causes the losing server to send out confirming
1554                  * FMODE lines.
1555                  */
1556                 if (ourTS > TS)
1557 // || (this->Instance->ULine(source.c_str())))
1558                 {
1559                         Instance->Log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
1560                         std::deque<std::string> param_list;
1561                         if (chan)
1562                                 chan->age = TS;
1563                         ourTS = TS;
1564                         param_list.push_back(channel);
1565                         Instance->Log(DEBUG,"REMOVE ALL STATUS MODES FROM OUR USERS *NOW*");
1566                         this->RemoveStatus(Instance->Config->ServerName, param_list);
1567                 }
1568
1569                 irc::tokenstream users(params[2]);
1570                 std::string item = "*";
1571
1572                 /* do this first, so our mode reversals are correctly received by other servers
1573                  * if there is a TS collision.
1574                  */
1575                 params[2] = ":" + params[2];
1576                 DoOneToAllButSender(source,"FJOIN",params,source);
1577                 while (item != "")
1578                 {
1579                         item = users.GetToken();
1580                         /* process one user at a time, applying modes. */
1581                         char* usr = (char*)item.c_str();
1582                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1583                          * (is this even possible?) */
1584                         if (usr && *usr)
1585                         {
1586                                 char* permissions = usr;
1587                                 int ntimes = 0;
1588                                 while ((*permissions) && (*permissions != ','))
1589                                 {
1590                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1591                                         if (mh)
1592                                         {
1593                                                 ntimes++;
1594                                                 charlcat(modestring,mh->GetModeChar(),MAXBUF);
1595                                         }
1596                                         else
1597                                         {
1598                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
1599                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
1600                                                 return false;
1601                                         }
1602                                         usr++;
1603                                         permissions++;
1604                                 }
1605                                 usr++;
1606
1607                                 /* Did they get any modes? How many times? */
1608                                 for (int k = 0; k < ntimes; k++)
1609                                         mode_users[modectr++] = strdup(usr);
1610
1611                                 who = this->Instance->FindNick(usr);
1612                                 if (who)
1613                                 {
1614                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, key);
1615                                         if (modectr >= (MAXMODES-1))
1616                                         {
1617                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1618                                                  * if there are more than MAXMODES to go.
1619                                                  */
1620                                                 if ((ourTS >= TS) || (this->Instance->ULine(who->server)))
1621                                                 {
1622                                                         /* We also always let u-lined clients win, no matter what the TS value */
1623                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1624                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1625                                                         if (ourTS != TS)
1626                                                         {
1627                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1628                                                                 chan->age = TS;
1629                                                                 ourTS = TS;
1630                                                         }
1631                                                 }
1632                                                 strcpy(mode_users[1],"+");
1633                                                 for (unsigned int f = 2; f < modectr; f++)
1634                                                         free(mode_users[f]);
1635                                                 modectr = 2;
1636                                         }
1637                                 }
1638                                 else
1639                                 {
1640                                         Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
1641                                         continue;
1642                                 }
1643                         }
1644                 }
1645                 /* there werent enough modes built up to flush it during FJOIN,
1646                  * or, there are a number left over. flush them out.
1647                  */
1648                 if ((modectr > 2) && (who) && (chan))
1649                 {
1650                         if (ourTS >= TS)
1651                         {
1652                                 Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1653                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1654                                 if (ourTS != TS)
1655                                 {
1656                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1657                                         chan->age = TS;
1658                                         ourTS = TS;
1659                                 }
1660                         }
1661
1662                         for (unsigned int f = 2; f < modectr; f++)
1663                                 free(mode_users[f]);
1664                 }
1665                 return true;
1666         }
1667
1668         /** NICK command */
1669         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1670         {
1671                 if (params.size() < 8)
1672                         return true;
1673                 if (params.size() > 8)
1674                 {
1675                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1676                         return true;
1677                 }
1678                 // NICK age nick host dhost ident +modes ip :gecos
1679                 //       0    1   2     3     4      5   6     7
1680                 time_t age = atoi(params[0].c_str());
1681
1682                 /* This used to have a pretty craq'y loop doing the same thing,
1683                  * now we just let the STL do the hard work (more efficiently)
1684                  */
1685                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1686                 if (pos_after_plus != std::string::npos)
1687                         params[5] = params[5].substr(pos_after_plus);
1688
1689                 const char* tempnick = params[1].c_str();
1690                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1691
1692                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1693
1694                 if (iter != this->Instance->clientlist.end())
1695                 {
1696                         // nick collision
1697                         Instance->Log(DEBUG,"Nick collision on %s!%s@%s: %lu %lu",tempnick,params[4].c_str(),params[2].c_str(),(unsigned long)age,(unsigned long)iter->second->age);
1698                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1699                         return true;
1700                 }
1701
1702                 userrec* _new = new userrec(this->Instance);
1703                 this->Instance->clientlist[tempnick] = _new;
1704                 _new->SetFd(FD_MAGIC_NUMBER);
1705                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1706                 strlcpy(_new->host, params[2].c_str(),63);
1707                 strlcpy(_new->dhost, params[3].c_str(),63);
1708                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1709                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1710                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1711                 _new->registered = REG_ALL;
1712                 _new->signon = age;
1713
1714                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1715                         _new->modes[(*v)-65] = 1;
1716
1717 #ifdef SUPPORT_IP6LINKS
1718                 if (params[6].find_first_of(":") != std::string::npos)
1719                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1720                 else
1721 #endif
1722                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1723
1724                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1725
1726                 params[7] = ":" + params[7];
1727                 DoOneToAllButSender(source,"NICK",params,source);
1728
1729                 // Increment the Source Servers User Count..
1730                 TreeServer* SourceServer = FindServer(source);
1731                 if (SourceServer)
1732                 {
1733                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1734                         SourceServer->AddUserCount();
1735                 }
1736
1737                 FOREACH_MOD(I_OnPostConnect,OnPostConnect(_new));
1738
1739                 return true;
1740         }
1741
1742         /** Send one or more FJOINs for a channel of users.
1743          * If the length of a single line is more than 480-NICKMAX
1744          * in length, it is split over multiple lines.
1745          */
1746         void SendFJoins(TreeServer* Current, chanrec* c)
1747         {
1748                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1749                 char list[MAXBUF];
1750                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1751
1752                 size_t dlen, curlen;
1753                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1754                 int numusers = 0;
1755                 char* ptr = list + dlen;
1756
1757                 CUList *ulist = c->GetUsers();
1758                 std::vector<userrec*> specific_halfop;
1759                 std::vector<userrec*> specific_voice;
1760                 std::string modes = "";
1761                 std::string params = "";
1762
1763                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1764                 {
1765                         // The first parameter gets a : before it
1766                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1767
1768                         curlen += ptrlen;
1769                         ptr += ptrlen;
1770
1771                         numusers++;
1772
1773                         if (curlen > (480-NICKMAX))
1774                         {
1775                                 this->WriteLine(list);
1776                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1777                                 ptr = list + dlen;
1778                                 ptrlen = 0;
1779                                 numusers = 0;
1780                         }
1781                 }
1782
1783                 if (numusers)
1784                         this->WriteLine(list);
1785
1786                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1787                 {
1788                         modes.append("b");
1789                         params.append(b->data).append(" ");
1790                 }
1791                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1792         }
1793
1794         /** Send G, Q, Z and E lines */
1795         void SendXLines(TreeServer* Current)
1796         {
1797                 char data[MAXBUF];
1798                 std::string n = this->Instance->Config->ServerName;
1799                 const char* sn = n.c_str();
1800                 int iterations = 0;
1801                 /* Yes, these arent too nice looking, but they get the job done */
1802                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1803                 {
1804                         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);
1805                         this->WriteLine(data);
1806                 }
1807                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1808                 {
1809                         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);
1810                         this->WriteLine(data);
1811                 }
1812                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1813                 {
1814                         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);
1815                         this->WriteLine(data);
1816                 }
1817                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1818                 {
1819                         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);
1820                         this->WriteLine(data);
1821                 }
1822                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1823                 {
1824                         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);
1825                         this->WriteLine(data);
1826                 }
1827                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1828                 {
1829                         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);
1830                         this->WriteLine(data);
1831                 }
1832                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1833                 {
1834                         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);
1835                         this->WriteLine(data);
1836                 }
1837                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1838                 {
1839                         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);
1840                         this->WriteLine(data);
1841                 }
1842         }
1843
1844         /** Send channel modes and topics */
1845         void SendChannelModes(TreeServer* Current)
1846         {
1847                 char data[MAXBUF];
1848                 std::deque<std::string> list;
1849                 int iterations = 0;
1850                 std::string n = this->Instance->Config->ServerName;
1851                 const char* sn = n.c_str();
1852                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1853                 {
1854                         SendFJoins(Current, c->second);
1855                         if (*c->second->topic)
1856                         {
1857                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1858                                 this->WriteLine(data);
1859                         }
1860                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1861                         list.clear();
1862                         c->second->GetExtList(list);
1863                         for (unsigned int j = 0; j < list.size(); j++)
1864                         {
1865                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1866                         }
1867                 }
1868         }
1869
1870         /** send all users and their oper state/modes */
1871         void SendUsers(TreeServer* Current)
1872         {
1873                 char data[MAXBUF];
1874                 std::deque<std::string> list;
1875                 int iterations = 0;
1876                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
1877                 {
1878                         if (u->second->registered == REG_ALL)
1879                         {
1880                                 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);
1881                                 this->WriteLine(data);
1882                                 if (*u->second->oper)
1883                                 {
1884                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1885                                 }
1886                                 if (*u->second->awaymsg)
1887                                 {
1888                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1889                                 }
1890                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1891                                 list.clear();
1892                                 u->second->GetExtList(list);
1893                                 for (unsigned int j = 0; j < list.size(); j++)
1894                                 {
1895                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1896                                 }
1897                         }
1898                 }
1899         }
1900
1901         /** This function is called when we want to send a netburst to a local
1902          * server. There is a set order we must do this, because for example
1903          * users require their servers to exist, and channels require their
1904          * users to exist. You get the idea.
1905          */
1906         void DoBurst(TreeServer* s)
1907         {
1908                 std::string burst = "BURST "+ConvToStr(time(NULL));
1909                 std::string endburst = "ENDBURST";
1910                 // Because by the end of the netburst, it  could be gone!
1911                 std::string name = s->GetName();
1912                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
1913                 this->WriteLine(burst);
1914                 /* send our version string */
1915                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
1916                 /* Send server tree */
1917                 this->SendServers(TreeRoot,s,1);
1918                 /* Send users and their oper status */
1919                 this->SendUsers(s);
1920                 /* Send everything else (channel modes, xlines etc) */
1921                 this->SendChannelModes(s);
1922                 this->SendXLines(s);
1923                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1924                 this->WriteLine(endburst);
1925                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
1926         }
1927
1928         /** This function is called when we receive data from a remote
1929          * server. We buffer the data in a std::string (it doesnt stay
1930          * there for long), reading using InspSocket::Read() which can
1931          * read up to 16 kilobytes in one operation.
1932          *
1933          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1934          * THE SOCKET OBJECT FOR US.
1935          */
1936         virtual bool OnDataReady()
1937         {
1938                 char* data = this->Read();
1939                 /* Check that the data read is a valid pointer and it has some content */
1940                 if (data && *data)
1941                 {
1942                         this->in_buffer.append(data);
1943                         /* While there is at least one new line in the buffer,
1944                          * do something useful (we hope!) with it.
1945                          */
1946                         while (in_buffer.find("\n") != std::string::npos)
1947                         {
1948                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1949                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1950                                 if (ret.find("\r") != std::string::npos)
1951                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1952                                 /* Process this one, abort if it
1953                                  * didnt return true.
1954                                  */
1955                                 if (this->ctx_in)
1956                                 {
1957                                         char out[1024];
1958                                         char result[1024];
1959                                         memset(result,0,1024);
1960                                         memset(out,0,1024);
1961                                         Instance->Log(DEBUG,"Original string '%s'",ret.c_str());
1962                                         /* ERROR + CAPAB is still allowed unencryped */
1963                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1964                                         {
1965                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1966                                                 if ((nbytes > 0) && (nbytes < 1024))
1967                                                 {
1968                                                         Instance->Log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1969                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1970                                                         for (int t = 0; t < nbytes; t++)
1971                                                                 if (result[t] == '\7') result[t] = 0;
1972                                                         ret = result;
1973                                                 }
1974                                         }
1975                                 }
1976                                 if (!this->ProcessLine(ret))
1977                                 {
1978                                         Instance->Log(DEBUG,"ProcessLine says no!");
1979                                         return false;
1980                                 }
1981                         }
1982                         return true;
1983                 }
1984                 /* EAGAIN returns an empty but non-NULL string, so this
1985                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1986                  */
1987                 return (data && !*data);
1988         }
1989
1990         int WriteLine(std::string line)
1991         {
1992                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
1993                 if (this->ctx_out)
1994                 {
1995                         char result[10240];
1996                         char result64[10240];
1997                         if (this->keylength)
1998                         {
1999                                 // pad it to the key length
2000                                 int n = this->keylength - (line.length() % this->keylength);
2001                                 if (n)
2002                                 {
2003                                         Instance->Log(DEBUG,"Append %d chars to line to make it %d long from %d, key length %d",n,n+line.length(),line.length(),this->keylength);
2004                                         line.append(n,'\7');
2005                                 }
2006                         }
2007                         unsigned int ll = line.length();
2008                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2009                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2010                         line = result64;
2011                         //int from64tobits(char *out, const char *in, int maxlen);
2012                 }
2013                 return this->Write(line + "\r\n");
2014         }
2015
2016         /* Handle ERROR command */
2017         bool Error(std::deque<std::string> &params)
2018         {
2019                 if (params.size() < 1)
2020                         return false;
2021                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2022                 /* we will return false to cause the socket to close. */
2023                 return false;
2024         }
2025
2026         /** remote MOTD. leet, huh? */
2027         bool Motd(std::string prefix, std::deque<std::string> &params)
2028         {
2029                 if (params.size() > 0)
2030                 {
2031                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2032                         {
2033                                 /* It's for our server */
2034                                 string_list results;
2035                                 userrec* source = this->Instance->FindNick(prefix);
2036
2037                                 if (source)
2038                                 {
2039                                         std::deque<std::string> par;
2040                                         par.push_back(prefix);
2041                                         par.push_back("");
2042
2043                                         if (!Instance->Config->MOTD.size())
2044                                         {
2045                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2046                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2047                                                 return true;
2048                                         }
2049
2050                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2051                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2052
2053                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2054                                         {
2055                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2056                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2057                                         }
2058
2059                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2060                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2061                                 }
2062                         }
2063                         else
2064                         {
2065                                 /* Pass it on */
2066                                 userrec* source = this->Instance->FindNick(prefix);
2067                                 if (source)
2068                                         DoOneToOne(prefix, "MOTD", params, params[0]);
2069                         }
2070                 }
2071                 return true;
2072         }
2073
2074         /** remote ADMIN. leet, huh? */
2075         bool Admin(std::string prefix, std::deque<std::string> &params)
2076         {
2077                 if (params.size() > 0)
2078                 {
2079                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2080                         {
2081                                 /* It's for our server */
2082                                 string_list results;
2083                                 userrec* source = this->Instance->FindNick(prefix);
2084
2085                                 if (source)
2086                                 {
2087                                         std::deque<std::string> par;
2088                                         par.push_back(prefix);
2089                                         par.push_back("");
2090
2091                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2092                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2093
2094                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2095                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2096
2097                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2098                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2099
2100                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2101                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2102                                 }
2103                         }
2104                         else
2105                         {
2106                                 /* Pass it on */
2107                                 userrec* source = this->Instance->FindNick(prefix);
2108                                 if (source)
2109                                         DoOneToOne(prefix, "ADMIN", params, params[0]);
2110                         }
2111                 }
2112                 return true;
2113         }
2114
2115         bool Stats(std::string prefix, std::deque<std::string> &params)
2116         {
2117                 /* Get the reply to a STATS query if it matches this servername,
2118                  * and send it back as a load of PUSH queries
2119                  */
2120                 if (params.size() > 1)
2121                 {
2122                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2123                         {
2124                                 /* It's for our server */
2125                                 string_list results;
2126                                 userrec* source = this->Instance->FindNick(prefix);
2127                                 if (source)
2128                                 {
2129                                         std::deque<std::string> par;
2130                                         par.push_back(prefix);
2131                                         par.push_back("");
2132                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2133                                         for (size_t i = 0; i < results.size(); i++)
2134                                         {
2135                                                 par[1] = "::" + results[i];
2136                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2137                                         }
2138                                 }
2139                         }
2140                         else
2141                         {
2142                                 /* Pass it on */
2143                                 userrec* source = this->Instance->FindNick(prefix);
2144                                 if (source)
2145                                         DoOneToOne(prefix, "STATS", params, params[1]);
2146                         }
2147                 }
2148                 return true;
2149         }
2150
2151
2152         /** Because the core won't let users or even SERVERS set +o,
2153          * we use the OPERTYPE command to do this.
2154          */
2155         bool OperType(std::string prefix, std::deque<std::string> &params)
2156         {
2157                 if (params.size() != 1)
2158                 {
2159                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2160                         return true;
2161                 }
2162                 std::string opertype = params[0];
2163                 userrec* u = this->Instance->FindNick(prefix);
2164                 if (u)
2165                 {
2166                         u->modes[UM_OPERATOR] = 1;
2167                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2168                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2169                 }
2170                 return true;
2171         }
2172
2173         /** Because Andy insists that services-compatible servers must
2174          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2175          */
2176         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2177         {
2178                 if (params.size() < 3)
2179                         return true;
2180
2181                 userrec* u = this->Instance->FindNick(params[0]);
2182
2183                 if (u)
2184                 {
2185                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2186                         if (IS_LOCAL(u))
2187                         {
2188                                 std::deque<std::string> par;
2189                                 par.push_back(params[1]);
2190                                 /* This is not required as one is sent in OnUserPostNick below
2191                                  */
2192                                 //DoOneToMany(u->nick,"NICK",par);
2193                                 if (!u->ForceNickChange(params[1].c_str()))
2194                                 {
2195                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2196                                         return true;
2197                                 }
2198                                 u->age = atoi(params[2].c_str());
2199                         }
2200                 }
2201                 return true;
2202         }
2203
2204         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2205         {
2206                 if (params.size() < 2)
2207                         return true;
2208
2209                 userrec* u = this->Instance->FindNick(params[0]);
2210
2211                 if (u)
2212                 {
2213                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2214                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2215                 }
2216                 return true;
2217         }
2218
2219         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2220         {
2221                 if (params.size() < 1)
2222                         return false;
2223
2224                 std::string servermask = params[0];
2225
2226                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2227                 {
2228                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2229                         this->Instance->RehashServer();
2230                         ReadConfiguration(false);
2231                         InitializeDisabledCommands(ServerInstance->Config->DisabledCommands, ServerInstance);
2232                 }
2233                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2234                 return true;
2235         }
2236
2237         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2238         {
2239                 if (params.size() != 2)
2240                         return true;
2241
2242                 std::string nick = params[0];
2243                 userrec* u = this->Instance->FindNick(prefix);
2244                 userrec* who = this->Instance->FindNick(nick);
2245
2246                 if (who)
2247                 {
2248                         /* Prepend kill source, if we don't have one */
2249                         std::string sourceserv = prefix;
2250                         if (u)
2251                         {
2252                                 sourceserv = u->server;
2253                         }
2254                         if (*(params[1].c_str()) != '[')
2255                         {
2256                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2257                         }
2258                         std::string reason = params[1];
2259                         params[1] = ":" + params[1];
2260                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2261                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2262                         userrec::QuitUser(this->Instance,who,reason);
2263                 }
2264                 return true;
2265         }
2266
2267         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2268         {
2269                 if (params.size() < 1)
2270                         return true;
2271
2272                 if (params.size() == 1)
2273                 {
2274                         TreeServer* ServerSource = FindServer(prefix);
2275                         if (ServerSource)
2276                         {
2277                                 ServerSource->SetPingFlag();
2278                         }
2279                 }
2280                 else
2281                 {
2282                         std::string forwardto = params[1];
2283                         if (forwardto == this->Instance->Config->ServerName)
2284                         {
2285                                 /*
2286                                  * this is a PONG for us
2287                                  * if the prefix is a user, check theyre local, and if they are,
2288                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2289                                  * Services might want to send these s->s, but we dont need to yet.
2290                                  */
2291                                 userrec* u = this->Instance->FindNick(prefix);
2292
2293                                 if (u)
2294                                 {
2295                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2296                                 }
2297                         }
2298                         else
2299                         {
2300                                 // not for us, pass it on :)
2301                                 DoOneToOne(prefix,"PONG",params,forwardto);
2302                         }
2303                 }
2304
2305                 return true;
2306         }
2307
2308         bool MetaData(std::string prefix, std::deque<std::string> &params)
2309         {
2310                 if (params.size() < 3)
2311                         return true;
2312
2313                 TreeServer* ServerSource = FindServer(prefix);
2314
2315                 if (ServerSource)
2316                 {
2317                         if (params[0] == "*")
2318                         {
2319                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2320                         }
2321                         else if (*(params[0].c_str()) == '#')
2322                         {
2323                                 chanrec* c = this->Instance->FindChan(params[0]);
2324                                 if (c)
2325                                 {
2326                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2327                                 }
2328                         }
2329                         else if (*(params[0].c_str()) != '#')
2330                         {
2331                                 userrec* u = this->Instance->FindNick(params[0]);
2332                                 if (u)
2333                                 {
2334                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2335                                 }
2336                         }
2337                 }
2338
2339                 params[2] = ":" + params[2];
2340                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2341                 return true;
2342         }
2343
2344         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2345         {
2346                 if (params.size() < 1)
2347                         return true;
2348
2349                 TreeServer* ServerSource = FindServer(prefix);
2350
2351                 if (ServerSource)
2352                 {
2353                         ServerSource->SetVersion(params[0]);
2354                 }
2355                 params[0] = ":" + params[0];
2356                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2357                 return true;
2358         }
2359
2360         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2361         {
2362                 if (params.size() < 1)
2363                         return true;
2364
2365                 userrec* u = this->Instance->FindNick(prefix);
2366
2367                 if (u)
2368                 {
2369                         u->ChangeDisplayedHost(params[0].c_str());
2370                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2371                 }
2372                 return true;
2373         }
2374
2375         bool AddLine(std::string prefix, std::deque<std::string> &params)
2376         {
2377                 if (params.size() < 6)
2378                         return true;
2379
2380                 bool propogate = false;
2381
2382                 switch (*(params[0].c_str()))
2383                 {
2384                         case 'Z':
2385                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2386                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2387                         break;
2388                         case 'Q':
2389                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2390                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2391                         break;
2392                         case 'E':
2393                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2394                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2395                         break;
2396                         case 'G':
2397                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2398                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2399                         break;
2400                         case 'K':
2401                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2402                         break;
2403                         default:
2404                                 /* Just in case... */
2405                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2406                                 propogate = false;
2407                         break;
2408                 }
2409
2410                 /* Send it on its way */
2411                 if (propogate)
2412                 {
2413                         if (atoi(params[4].c_str()))
2414                         {
2415                                 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());
2416                         }
2417                         else
2418                         {
2419                                 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());
2420                         }
2421                         params[5] = ":" + params[5];
2422                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2423                 }
2424                 if (!this->bursting)
2425                 {
2426                         Instance->Log(DEBUG,"Applying lines...");
2427                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2428                 }
2429                 return true;
2430         }
2431
2432         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2433         {
2434                 if (params.size() < 1)
2435                         return true;
2436
2437                 userrec* u = this->Instance->FindNick(prefix);
2438
2439                 if (u)
2440                 {
2441                         u->ChangeName(params[0].c_str());
2442                         params[0] = ":" + params[0];
2443                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2444                 }
2445                 return true;
2446         }
2447
2448         bool Whois(std::string prefix, std::deque<std::string> &params)
2449         {
2450                 if (params.size() < 1)
2451                         return true;
2452
2453                 Instance->Log(DEBUG,"In IDLE command");
2454                 userrec* u = this->Instance->FindNick(prefix);
2455
2456                 if (u)
2457                 {
2458                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2459                         // an incoming request
2460                         if (params.size() == 1)
2461                         {
2462                                 userrec* x = this->Instance->FindNick(params[0]);
2463                                 if ((x) && (IS_LOCAL(x)))
2464                                 {
2465                                         userrec* x = this->Instance->FindNick(params[0]);
2466                                         char signon[MAXBUF];
2467                                         char idle[MAXBUF];
2468
2469                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2470                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2471                                         std::deque<std::string> par;
2472                                         par.push_back(prefix);
2473                                         par.push_back(signon);
2474                                         par.push_back(idle);
2475                                         // ours, we're done, pass it BACK
2476                                         DoOneToOne(params[0],"IDLE",par,u->server);
2477                                 }
2478                                 else
2479                                 {
2480                                         // not ours pass it on
2481                                         DoOneToOne(prefix,"IDLE",params,x->server);
2482                                 }
2483                         }
2484                         else if (params.size() == 3)
2485                         {
2486                                 std::string who_did_the_whois = params[0];
2487                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2488                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2489                                 {
2490                                         // an incoming reply to a whois we sent out
2491                                         std::string nick_whoised = prefix;
2492                                         unsigned long signon = atoi(params[1].c_str());
2493                                         unsigned long idle = atoi(params[2].c_str());
2494                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2495                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2496                                 }
2497                                 else
2498                                 {
2499                                         // not ours, pass it on
2500                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2501                                 }
2502                         }
2503                 }
2504                 return true;
2505         }
2506
2507         bool Push(std::string prefix, std::deque<std::string> &params)
2508         {
2509                 if (params.size() < 2)
2510                         return true;
2511
2512                 userrec* u = this->Instance->FindNick(params[0]);
2513
2514                 if (!u)
2515                         return true;
2516
2517                 if (IS_LOCAL(u))
2518                 {
2519                         u->Write(params[1]);
2520                 }
2521                 else
2522                 {
2523                         // continue the raw onwards
2524                         params[1] = ":" + params[1];
2525                         DoOneToOne(prefix,"PUSH",params,u->server);
2526                 }
2527                 return true;
2528         }
2529
2530         bool Time(std::string prefix, std::deque<std::string> &params)
2531         {
2532                 // :source.server TIME remote.server sendernick
2533                 // :remote.server TIME source.server sendernick TS
2534                 if (params.size() == 2)
2535                 {
2536                         // someone querying our time?
2537                         if (this->Instance->Config->ServerName == params[0])
2538                         {
2539                                 userrec* u = this->Instance->FindNick(params[1]);
2540                                 if (u)
2541                                 {
2542                                         char curtime[256];
2543                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2544                                         params.push_back(curtime);
2545                                         params[0] = prefix;
2546                                         DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2547                                 }
2548                         }
2549                         else
2550                         {
2551                                 // not us, pass it on
2552                                 userrec* u = this->Instance->FindNick(params[1]);
2553                                 if (u)
2554                                         DoOneToOne(prefix,"TIME",params,params[0]);
2555                         }
2556                 }
2557                 else if (params.size() == 3)
2558                 {
2559                         // a response to a previous TIME
2560                         userrec* u = this->Instance->FindNick(params[1]);
2561                         if ((u) && (IS_LOCAL(u)))
2562                         {
2563                         time_t rawtime = atol(params[2].c_str());
2564                         struct tm * timeinfo;
2565                         timeinfo = localtime(&rawtime);
2566                                 char tms[26];
2567                                 snprintf(tms,26,"%s",asctime(timeinfo));
2568                                 tms[24] = 0;
2569                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2570                         }
2571                         else
2572                         {
2573                                 if (u)
2574                                         DoOneToOne(prefix,"TIME",params,u->server);
2575                         }
2576                 }
2577                 return true;
2578         }
2579
2580         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2581         {
2582                 if (params.size() < 1)
2583                         return true;
2584
2585                 if (params.size() == 1)
2586                 {
2587                         std::string stufftobounce = params[0];
2588                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2589                         return true;
2590                 }
2591                 else
2592                 {
2593                         std::string forwardto = params[1];
2594                         if (forwardto == this->Instance->Config->ServerName)
2595                         {
2596                                 // this is a ping for us, send back PONG to the requesting server
2597                                 params[1] = params[0];
2598                                 params[0] = forwardto;
2599                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2600                         }
2601                         else
2602                         {
2603                                 // not for us, pass it on :)
2604                                 DoOneToOne(prefix,"PING",params,forwardto);
2605                         }
2606                         return true;
2607                 }
2608         }
2609
2610         bool RemoveStatus(std::string prefix, std::deque<std::string> &params)
2611         {
2612                 if (params.size() < 1)
2613                         return true;
2614
2615                 chanrec* c = Instance->FindChan(params[0]);
2616
2617                 if (c)
2618                 {
2619                         irc::modestacker modestack(false);
2620                         CUList *ulist = c->GetUsers();
2621                         const char* y[127];
2622                         std::deque<std::string> stackresult;
2623                         std::string x;
2624
2625                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2626                         {
2627                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2628                                 if (modesequence.length())
2629                                 {
2630                                         irc::spacesepstream sep(modesequence);
2631                                         std::string modeletters = sep.GetToken();
2632
2633                                         while (!modeletters.empty())
2634                                         {
2635                                                 char mletter = *(modeletters.begin());
2636                                                 modestack.Push(mletter,sep.GetToken());
2637                                                 modeletters.erase(modeletters.begin());
2638                                         }
2639                                 }
2640                         }
2641
2642                         while (modestack.GetStackedLine(stackresult))
2643                         {
2644                                 stackresult.push_front(ConvToStr(c->age));
2645                                 stackresult.push_front(c->name);
2646                                 DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2647                                 stackresult.erase(stackresult.begin() + 1);
2648                                 for (size_t z = 0; z < stackresult.size(); z++)
2649                                 {
2650                                         y[z] = stackresult[z].c_str();
2651                                 }
2652                                 userrec* n = new userrec(Instance);
2653                                 n->SetFd(FD_MAGIC_NUMBER);
2654                                 Instance->SendMode(y, stackresult.size(), n);
2655                                 delete n;
2656                         }
2657                 }
2658                 return true;
2659         }
2660
2661         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2662         {
2663                 if (params.size() < 4)
2664                         return false;
2665
2666                 std::string servername = params[0];
2667                 std::string password = params[1];
2668                 // hopcount is not used for a remote server, we calculate this ourselves
2669                 std::string description = params[3];
2670                 TreeServer* ParentOfThis = FindServer(prefix);
2671
2672                 if (!ParentOfThis)
2673                 {
2674                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2675                         return false;
2676                 }
2677                 TreeServer* CheckDupe = FindServer(servername);
2678                 if (CheckDupe)
2679                 {
2680                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2681                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2682                         return false;
2683                 }
2684                 TreeServer* Node = new TreeServer(this->Instance,servername,description,ParentOfThis,NULL);
2685                 ParentOfThis->AddChild(Node);
2686                 params[3] = ":" + params[3];
2687                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2688                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2689                 return true;
2690         }
2691
2692         bool Outbound_Reply_Server(std::deque<std::string> &params)
2693         {
2694                 if (params.size() < 4)
2695                         return false;
2696
2697                 irc::string servername = params[0].c_str();
2698                 std::string sname = params[0];
2699                 std::string password = params[1];
2700                 int hops = atoi(params[2].c_str());
2701
2702                 if (hops)
2703                 {
2704                         this->WriteLine("ERROR :Server too far away for authentication");
2705                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2706                         return false;
2707                 }
2708                 std::string description = params[3];
2709                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2710                 {
2711                         if ((x->Name == servername) && (x->RecvPass == password))
2712                         {
2713                                 TreeServer* CheckDupe = FindServer(sname);
2714                                 if (CheckDupe)
2715                                 {
2716                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2717                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2718                                         return false;
2719                                 }
2720                                 // Begin the sync here. this kickstarts the
2721                                 // other side, waiting in WAIT_AUTH_2 state,
2722                                 // into starting their burst, as it shows
2723                                 // that we're happy.
2724                                 this->LinkState = CONNECTED;
2725                                 // we should add the details of this server now
2726                                 // to the servers tree, as a child of the root
2727                                 // node.
2728                                 TreeServer* Node = new TreeServer(this->Instance,sname,description,TreeRoot,this);
2729                                 TreeRoot->AddChild(Node);
2730                                 params[3] = ":" + params[3];
2731                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2732                                 this->bursting = true;
2733                                 this->DoBurst(Node);
2734                                 return true;
2735                         }
2736                 }
2737                 this->WriteLine("ERROR :Invalid credentials");
2738                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2739                 return false;
2740         }
2741
2742         bool Inbound_Server(std::deque<std::string> &params)
2743         {
2744                 if (params.size() < 4)
2745                         return false;
2746
2747                 irc::string servername = params[0].c_str();
2748                 std::string sname = params[0];
2749                 std::string password = params[1];
2750                 int hops = atoi(params[2].c_str());
2751
2752                 if (hops)
2753                 {
2754                         this->WriteLine("ERROR :Server too far away for authentication");
2755                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2756                         return false;
2757                 }
2758                 std::string description = params[3];
2759                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2760                 {
2761                         if ((x->Name == servername) && (x->RecvPass == password))
2762                         {
2763                                 TreeServer* CheckDupe = FindServer(sname);
2764                                 if (CheckDupe)
2765                                 {
2766                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2767                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2768                                         return false;
2769                                 }
2770                                 /* If the config says this link is encrypted, but the remote side
2771                                  * hasnt bothered to send the AES command before SERVER, then we
2772                                  * boot them off as we MUST have this connection encrypted.
2773                                  */
2774                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2775                                 {
2776                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2777                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2778                                         return false;
2779                                 }
2780                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2781                                 this->InboundServerName = sname;
2782                                 this->InboundDescription = description;
2783                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2784                                 // along with the sendpass from this block.
2785                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2786                                 // move to the next state, we are now waiting for THEM.
2787                                 this->LinkState = WAIT_AUTH_2;
2788                                 return true;
2789                         }
2790                 }
2791                 this->WriteLine("ERROR :Invalid credentials");
2792                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2793                 return false;
2794         }
2795
2796         void Split(std::string line, std::deque<std::string> &n)
2797         {
2798                 n.clear();
2799                 irc::tokenstream tokens(line);
2800                 std::string param;
2801                 while ((param = tokens.GetToken()) != "")
2802                         n.push_back(param);
2803                 return;
2804         }
2805
2806         bool ProcessLine(std::string line)
2807         {
2808                 std::deque<std::string> params;
2809                 irc::string command;
2810                 std::string prefix;
2811
2812                 if (line.empty())
2813                         return true;
2814
2815                 line = line.substr(0, line.find_first_of("\r\n"));
2816
2817                 Instance->Log(DEBUG,"IN: %s", line.c_str());
2818
2819                 this->Split(line.c_str(),params);
2820
2821                 if ((params[0][0] == ':') && (params.size() > 1))
2822                 {
2823                         prefix = params[0].substr(1);
2824                         params.pop_front();
2825                 }
2826
2827                 command = params[0].c_str();
2828                 params.pop_front();
2829
2830                 if ((!this->ctx_in) && (command == "AES"))
2831                 {
2832                         std::string sserv = params[0];
2833                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2834                         {
2835                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2836                                 {
2837                                         this->InitAES(x->EncryptionKey,sserv);
2838                                 }
2839                         }
2840
2841                         return true;
2842                 }
2843                 else if ((this->ctx_in) && (command == "AES"))
2844                 {
2845                         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());
2846                 }
2847
2848                 switch (this->LinkState)
2849                 {
2850                         TreeServer* Node;
2851
2852                         case WAIT_AUTH_1:
2853                                 // Waiting for SERVER command from remote server. Server initiating
2854                                 // the connection sends the first SERVER command, listening server
2855                                 // replies with theirs if its happy, then if the initiator is happy,
2856                                 // it starts to send its net sync, which starts the merge, otherwise
2857                                 // it sends an ERROR.
2858                                 if (command == "PASS")
2859                                 {
2860                                         /* Silently ignored */
2861                                 }
2862                                 else if (command == "SERVER")
2863                                 {
2864                                         return this->Inbound_Server(params);
2865                                 }
2866                                 else if (command == "ERROR")
2867                                 {
2868                                         return this->Error(params);
2869                                 }
2870                                 else if (command == "USER")
2871                                 {
2872                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2873                                         return false;
2874                                 }
2875                                 else if (command == "CAPAB")
2876                                 {
2877                                         return this->Capab(params);
2878                                 }
2879                                 else if ((command == "U") || (command == "S"))
2880                                 {
2881                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2882                                         return false;
2883                                 }
2884                                 else
2885                                 {
2886                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2887                                         return false;
2888                                 }
2889                         break;
2890                         case WAIT_AUTH_2:
2891                                 // Waiting for start of other side's netmerge to say they liked our
2892                                 // password.
2893                                 if (command == "SERVER")
2894                                 {
2895                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2896                                         // silently ignore.
2897                                         return true;
2898                                 }
2899                                 else if ((command == "U") || (command == "S"))
2900                                 {
2901                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2902                                         return false;
2903                                 }
2904                                 else if (command == "BURST")
2905                                 {
2906                                         if (params.size())
2907                                         {
2908                                                 /* If a time stamp is provided, try and check syncronization */
2909                                                 time_t THEM = atoi(params[0].c_str());
2910                                                 long delta = THEM-time(NULL);
2911                                                 if ((delta < -600) || (delta > 600))
2912                                                 {
2913                                                         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));
2914                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2915                                                         return false;
2916                                                 }
2917                                                 else if ((delta < -60) || (delta > 60))
2918                                                 {
2919                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2920                                                 }
2921                                         }
2922                                         this->LinkState = CONNECTED;
2923                                         Node = new TreeServer(this->Instance,InboundServerName,InboundDescription,TreeRoot,this);
2924                                         TreeRoot->AddChild(Node);
2925                                         params.clear();
2926                                         params.push_back(InboundServerName);
2927                                         params.push_back("*");
2928                                         params.push_back("1");
2929                                         params.push_back(":"+InboundDescription);
2930                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2931                                         this->bursting = true;
2932                                         this->DoBurst(Node);
2933                                 }
2934                                 else if (command == "ERROR")
2935                                 {
2936                                         return this->Error(params);
2937                                 }
2938                                 else if (command == "CAPAB")
2939                                 {
2940                                         return this->Capab(params);
2941                                 }
2942
2943                         break;
2944                         case LISTENER:
2945                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2946                                 return false;
2947                         break;
2948                         case CONNECTING:
2949                                 if (command == "SERVER")
2950                                 {
2951                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2952                                         // has just sent us their credentials. If we get this far, theyre
2953                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2954                                         // if we're happy with this, we should send our netburst which
2955                                         // kickstarts the merge.
2956                                         return this->Outbound_Reply_Server(params);
2957                                 }
2958                                 else if (command == "ERROR")
2959                                 {
2960                                         return this->Error(params);
2961                                 }
2962                         break;
2963                         case CONNECTED:
2964                                 // This is the 'authenticated' state, when all passwords
2965                                 // have been exchanged and anything past this point is taken
2966                                 // as gospel.
2967
2968                                 if (prefix != "")
2969                                 {
2970                                         std::string direction = prefix;
2971                                         userrec* t = this->Instance->FindNick(prefix);
2972                                         if (t)
2973                                         {
2974                                                 direction = t->server;
2975                                         }
2976                                         TreeServer* route_back_again = BestRouteTo(direction);
2977                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2978                                         {
2979                                                 if (route_back_again)
2980                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2981                                                 return true;
2982                                         }
2983
2984                                         /* Fix by brain:
2985                                          * When there is activity on the socket, reset the ping counter so
2986                                          * that we're not wasting bandwidth pinging an active server.
2987                                          */
2988                                         route_back_again->SetNextPingTime(time(NULL) + 60);
2989                                         route_back_again->SetPingFlag();
2990                                 }
2991
2992                                 if (command == "SVSMODE")
2993                                 {
2994                                         /* Services expects us to implement
2995                                          * SVSMODE. In inspircd its the same as
2996                                          * MODE anyway.
2997                                          */
2998                                         command = "MODE";
2999                                 }
3000                                 std::string target = "";
3001                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3002                                  * working with std::string here.
3003                                  */
3004                                 if ((command == "NICK") && (params.size() > 1))
3005                                 {
3006                                         return this->IntroduceClient(prefix,params);
3007                                 }
3008                                 else if (command == "FJOIN")
3009                                 {
3010                                         return this->ForceJoin(prefix,params);
3011                                 }
3012                                 else if (command == "STATS")
3013                                 {
3014                                         return this->Stats(prefix, params);
3015                                 }
3016                                 else if (command == "MOTD")
3017                                 {
3018                                         return this->Motd(prefix, params);
3019                                 }
3020                                 else if (command == "ADMIN")
3021                                 {
3022                                         return this->Admin(prefix, params);
3023                                 }
3024                                 else if (command == "SERVER")
3025                                 {
3026                                         return this->RemoteServer(prefix,params);
3027                                 }
3028                                 else if (command == "ERROR")
3029                                 {
3030                                         return this->Error(params);
3031                                 }
3032                                 else if (command == "OPERTYPE")
3033                                 {
3034                                         return this->OperType(prefix,params);
3035                                 }
3036                                 else if (command == "FMODE")
3037                                 {
3038                                         return this->ForceMode(prefix,params);
3039                                 }
3040                                 else if (command == "KILL")
3041                                 {
3042                                         return this->RemoteKill(prefix,params);
3043                                 }
3044                                 else if (command == "FTOPIC")
3045                                 {
3046                                         return this->ForceTopic(prefix,params);
3047                                 }
3048                                 else if (command == "REHASH")
3049                                 {
3050                                         return this->RemoteRehash(prefix,params);
3051                                 }
3052                                 else if (command == "METADATA")
3053                                 {
3054                                         return this->MetaData(prefix,params);
3055                                 }
3056                                 else if (command == "REMSTATUS")
3057                                 {
3058                                         return this->RemoveStatus(prefix,params);
3059                                 }
3060                                 else if (command == "PING")
3061                                 {
3062                                         /*
3063                                          * We just got a ping from a server that's bursting.
3064                                          * This can't be right, so set them to not bursting, and
3065                                          * apply their lines.
3066                                          */
3067                                         if (this->bursting)
3068                                         {
3069                                                 this->bursting = false;
3070                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3071                                         }
3072                                         if (prefix == "")
3073                                         {
3074                                                 prefix = this->GetName();
3075                                         }
3076                                         return this->LocalPing(prefix,params);
3077                                 }
3078                                 else if (command == "PONG")
3079                                 {
3080                                         /*
3081                                          * We just got a pong from a server that's bursting.
3082                                          * This can't be right, so set them to not bursting, and
3083                                          * apply their lines.
3084                                          */
3085                                         if (this->bursting)
3086                                         {
3087                                                 this->bursting = false;
3088                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3089                                         }
3090                                         if (prefix == "")
3091                                         {
3092                                                 prefix = this->GetName();
3093                                         }
3094                                         return this->LocalPong(prefix,params);
3095                                 }
3096                                 else if (command == "VERSION")
3097                                 {
3098                                         return this->ServerVersion(prefix,params);
3099                                 }
3100                                 else if (command == "FHOST")
3101                                 {
3102                                         return this->ChangeHost(prefix,params);
3103                                 }
3104                                 else if (command == "FNAME")
3105                                 {
3106                                         return this->ChangeName(prefix,params);
3107                                 }
3108                                 else if (command == "ADDLINE")
3109                                 {
3110                                         return this->AddLine(prefix,params);
3111                                 }
3112                                 else if (command == "SVSNICK")
3113                                 {
3114                                         if (prefix == "")
3115                                         {
3116                                                 prefix = this->GetName();
3117                                         }
3118                                         return this->ForceNick(prefix,params);
3119                                 }
3120                                 else if (command == "IDLE")
3121                                 {
3122                                         return this->Whois(prefix,params);
3123                                 }
3124                                 else if (command == "PUSH")
3125                                 {
3126                                         return this->Push(prefix,params);
3127                                 }
3128                                 else if (command == "TIME")
3129                                 {
3130                                         return this->Time(prefix,params);
3131                                 }
3132                                 else if ((command == "KICK") && (IsServer(prefix)))
3133                                 {
3134                                         std::string sourceserv = this->myhost;
3135                                         if (params.size() == 3)
3136                                         {
3137                                                 userrec* user = this->Instance->FindNick(params[1]);
3138                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3139                                                 if (user && chan)
3140                                                 {
3141                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3142                                                                 /* Yikes, the channels gone! */
3143                                                                 delete chan;
3144                                                 }
3145                                         }
3146                                         if (this->InboundServerName != "")
3147                                         {
3148                                                 sourceserv = this->InboundServerName;
3149                                         }
3150                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3151                                 }
3152                                 else if (command == "SVSJOIN")
3153                                 {
3154                                         if (prefix == "")
3155                                         {
3156                                                 prefix = this->GetName();
3157                                         }
3158                                         return this->ServiceJoin(prefix,params);
3159                                 }
3160                                 else if (command == "SQUIT")
3161                                 {
3162                                         if (params.size() == 2)
3163                                         {
3164                                                 this->Squit(FindServer(params[0]),params[1]);
3165                                         }
3166                                         return true;
3167                                 }
3168                                 else if (command == "ENDBURST")
3169                                 {
3170                                         this->bursting = false;
3171                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3172                                         std::string sourceserv = this->myhost;
3173                                         if (this->InboundServerName != "")
3174                                         {
3175                                                 sourceserv = this->InboundServerName;
3176                                         }
3177                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3178                                         return true;
3179                                 }
3180                                 else
3181                                 {
3182                                         // not a special inter-server command.
3183                                         // Emulate the actual user doing the command,
3184                                         // this saves us having a huge ugly parser.
3185                                         userrec* who = this->Instance->FindNick(prefix);
3186                                         std::string sourceserv = this->myhost;
3187                                         if (this->InboundServerName != "")
3188                                         {
3189                                                 sourceserv = this->InboundServerName;
3190                                         }
3191                                         if (who)
3192                                         {
3193                                                 if ((command == "NICK") && (params.size() > 0))
3194                                                 {
3195                                                         /* On nick messages, check that the nick doesnt
3196                                                          * already exist here. If it does, kill their copy,
3197                                                          * and our copy.
3198                                                          */
3199                                                         userrec* x = this->Instance->FindNick(params[0]);
3200                                                         if ((x) && (x != who))
3201                                                         {
3202                                                                 std::deque<std::string> p;
3203                                                                 p.push_back(params[0]);
3204                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3205                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3206                                                                 p.clear();
3207                                                                 p.push_back(prefix);
3208                                                                 p.push_back("Nickname collision");
3209                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3210                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3211                                                                 userrec* y = this->Instance->FindNick(prefix);
3212                                                                 if (y)
3213                                                                 {
3214                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3215                                                                 }
3216                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3217                                                         }
3218                                                 }
3219                                                 // its a user
3220                                                 target = who->server;
3221                                                 const char* strparams[127];
3222                                                 for (unsigned int q = 0; q < params.size(); q++)
3223                                                 {
3224                                                         strparams[q] = params[q].c_str();
3225                                                 }
3226                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3227                                                 {
3228                                                         case CMD_INVALID:
3229                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3230                                                                 return false;
3231                                                         break;
3232                                                         case CMD_FAILURE:
3233                                                                 return true;
3234                                                         break;
3235                                                         default:
3236                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3237                                                         break;
3238                                                 }
3239                                         }
3240                                         else
3241                                         {
3242                                                 // its not a user. Its either a server, or somethings screwed up.
3243                                                 if (IsServer(prefix))
3244                                                 {
3245                                                         target = this->Instance->Config->ServerName;
3246                                                 }
3247                                                 else
3248                                                 {
3249                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3250                                                         return true;
3251                                                 }
3252                                         }
3253                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3254
3255                                 }
3256                                 return true;
3257                         break;
3258                 }
3259                 return true;
3260         }
3261
3262         virtual std::string GetName()
3263         {
3264                 std::string sourceserv = this->myhost;
3265                 if (this->InboundServerName != "")
3266                 {
3267                         sourceserv = this->InboundServerName;
3268                 }
3269                 return sourceserv;
3270         }
3271
3272         virtual void OnTimeout()
3273         {
3274                 if (this->LinkState == CONNECTING)
3275                 {
3276                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3277                         Link* MyLink = FindLink(myhost);
3278                         if (MyLink)
3279                                 DoFailOver(MyLink);
3280                 }
3281         }
3282
3283         virtual void OnClose()
3284         {
3285                 // Connection closed.
3286                 // If the connection is fully up (state CONNECTED)
3287                 // then propogate a netsplit to all peers.
3288                 std::string quitserver = this->myhost;
3289                 if (this->InboundServerName != "")
3290                 {
3291                         quitserver = this->InboundServerName;
3292                 }
3293                 TreeServer* s = FindServer(quitserver);
3294                 if (s)
3295                 {
3296                         Squit(s,"Remote host closed the connection");
3297                 }
3298                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3299         }
3300
3301         virtual int OnIncomingConnection(int newsock, char* ip)
3302         {
3303                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3304                  * or discovering if this port is the server port, we don't allow connections from any
3305                  * IPs for which we don't have a link block.
3306                  */
3307                 bool found = false;
3308
3309                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3310                 if (!found)
3311                 {
3312                         for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
3313                                 if (MatchCIDR(ip, (*i).c_str()))
3314                                         found = true;
3315
3316                         if (!found)
3317                         {
3318                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3319                                 close(newsock);
3320                                 return false;
3321                         }
3322                 }
3323                 TreeSocket* s = new TreeSocket(this->Instance, newsock, ip);
3324                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3325                 return true;
3326         }
3327 };
3328
3329 /** This class is used to resolve server hostnames during /connect and autoconnect.
3330  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3331  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3332  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3333  * will have an IP address which we can then use to continue our connection.
3334  */
3335 class ServernameResolver : public Resolver
3336 {
3337  private:
3338         /** A copy of the Link tag info for what we're connecting to.
3339          * We take a copy, rather than using a pointer, just in case the
3340          * admin takes the tag away and rehashes while the domain is resolving.
3341          */
3342         Link MyLink;
3343  public:
3344         ServernameResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3345         {
3346                 /* Nothing in here, folks */
3347         }
3348
3349         void OnLookupComplete(const std::string &result)
3350         {
3351                 /* Initiate the connection, now that we have an IP to use.
3352                  * Passing a hostname directly to InspSocket causes it to
3353                  * just bail and set its FD to -1.
3354                  */
3355                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3356                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3357                 {
3358                         TreeSocket* newsocket = new TreeSocket(ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3359                         if (newsocket->GetFd() > -1)
3360                         {
3361                                 /* We're all OK */
3362                         }
3363                         else
3364                         {
3365                                 /* Something barfed, show the opers */
3366                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3367                                 delete newsocket;
3368                                 DoFailOver(&MyLink);
3369                         }
3370                 }
3371         }
3372
3373         void OnError(ResolverError e, const std::string &errormessage)
3374         {
3375                 /* Ooops! */
3376                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3377                 DoFailOver(&MyLink);
3378         }
3379 };
3380
3381 class SecurityIPResolver : public Resolver
3382 {
3383  private:
3384         Link MyLink;
3385  public:
3386         SecurityIPResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3387         {
3388         }
3389
3390         void OnLookupComplete(const std::string &result)
3391         {
3392                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3393                 ValidIPs.push_back(result);
3394         }
3395
3396         void OnError(ResolverError e, const std::string &errormessage)
3397         {
3398                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3399         }
3400 };
3401
3402 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3403 {
3404         for (unsigned int c = 0; c < list.size(); c++)
3405         {
3406                 if (list[c] == server)
3407                 {
3408                         return;
3409                 }
3410         }
3411         list.push_back(server);
3412 }
3413
3414 /** returns a list of DIRECT servernames for a specific channel */
3415 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3416 {
3417         CUList *ulist = c->GetUsers();
3418         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3419         {
3420                 if (i->second->GetFd() < 0)
3421                 {
3422                         TreeServer* best = BestRouteTo(i->second->server);
3423                         if (best)
3424                                 AddThisServer(best,list);
3425                 }
3426         }
3427         return;
3428 }
3429
3430 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3431 {
3432         TreeServer* omitroute = BestRouteTo(omit);
3433         if ((command == "NOTICE") || (command == "PRIVMSG"))
3434         {
3435                 if (params.size() >= 2)
3436                 {
3437                         /* Prefixes */
3438                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3439                         {
3440                                 params[0] = params[0].substr(1, params[0].length()-1);
3441                         }
3442                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3443                         {
3444                                 // special routing for private messages/notices
3445                                 userrec* d = ServerInstance->FindNick(params[0]);
3446                                 if (d)
3447                                 {
3448                                         std::deque<std::string> par;
3449                                         par.push_back(params[0]);
3450                                         par.push_back(":"+params[1]);
3451                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3452                                         return true;
3453                                 }
3454                         }
3455                         else if (*(params[0].c_str()) == '$')
3456                         {
3457                                 std::deque<std::string> par;
3458                                 par.push_back(params[0]);
3459                                 par.push_back(":"+params[1]);
3460                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3461                                 return true;
3462                         }
3463                         else
3464                         {
3465                                 ServerInstance->Log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3466                                 chanrec* c = ServerInstance->FindChan(params[0]);
3467                                 if (c)
3468                                 {
3469                                         std::deque<TreeServer*> list;
3470                                         GetListOfServersForChannel(c,list);
3471                                         ServerInstance->Log(DEBUG,"Got a list of %d servers",list.size());
3472                                         unsigned int lsize = list.size();
3473                                         for (unsigned int i = 0; i < lsize; i++)
3474                                         {
3475                                                 TreeSocket* Sock = list[i]->GetSocket();
3476                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3477                                                 {
3478                                                         ServerInstance->Log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3479                                                         Sock->WriteLine(data);
3480                                                 }
3481                                         }
3482                                         return true;
3483                                 }
3484                         }
3485                 }
3486         }
3487         unsigned int items = TreeRoot->ChildCount();
3488         for (unsigned int x = 0; x < items; x++)
3489         {
3490                 TreeServer* Route = TreeRoot->GetChild(x);
3491                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3492                 {
3493                         TreeSocket* Sock = Route->GetSocket();
3494                         if (Sock)
3495                                 Sock->WriteLine(data);
3496                 }
3497         }
3498         return true;
3499 }
3500
3501 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3502 {
3503         TreeServer* omitroute = BestRouteTo(omit);
3504         std::string FullLine = ":" + prefix + " " + command;
3505         unsigned int words = params.size();
3506         for (unsigned int x = 0; x < words; x++)
3507         {
3508                 FullLine = FullLine + " " + params[x];
3509         }
3510         unsigned int items = TreeRoot->ChildCount();
3511         for (unsigned int x = 0; x < items; x++)
3512         {
3513                 TreeServer* Route = TreeRoot->GetChild(x);
3514                 // Send the line IF:
3515                 // The route has a socket (its a direct connection)
3516                 // The route isnt the one to be omitted
3517                 // The route isnt the path to the one to be omitted
3518                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3519                 {
3520                         TreeSocket* Sock = Route->GetSocket();
3521                         if (Sock)
3522                                 Sock->WriteLine(FullLine);
3523                 }
3524         }
3525         return true;
3526 }
3527
3528 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
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         unsigned int items = TreeRoot->ChildCount();
3537         for (unsigned int x = 0; x < items; x++)
3538         {
3539                 TreeServer* Route = TreeRoot->GetChild(x);
3540                 if (Route && Route->GetSocket())
3541                 {
3542                         TreeSocket* Sock = Route->GetSocket();
3543                         if (Sock)
3544                                 Sock->WriteLine(FullLine);
3545                 }
3546         }
3547         return true;
3548 }
3549
3550 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3551 {
3552         std::string spfx = prefix;
3553         std::string scmd = command;
3554         return DoOneToMany(spfx, scmd, params);
3555 }
3556
3557 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3558 {
3559         std::string spfx = prefix;
3560         std::string scmd = command;
3561         return DoOneToAllButSender(spfx, scmd, params, omit);
3562 }
3563
3564 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3565 {
3566         TreeServer* Route = BestRouteTo(target);
3567         if (Route)
3568         {
3569                 std::string FullLine = ":" + prefix + " " + command;
3570                 unsigned int words = params.size();
3571                 for (unsigned int x = 0; x < words; x++)
3572                 {
3573                         FullLine = FullLine + " " + params[x];
3574                 }
3575                 if (Route && Route->GetSocket())
3576                 {
3577                         TreeSocket* Sock = Route->GetSocket();
3578                         if (Sock)
3579                                 Sock->WriteLine(FullLine);
3580                 }
3581                 return true;
3582         }
3583         else
3584         {
3585                 return false;
3586         }
3587 }
3588
3589 std::vector<TreeSocket*> Bindings;
3590
3591 void ReadConfiguration(bool rebind)
3592 {
3593         Conf = new ConfigReader(ServerInstance);
3594         if (rebind)
3595         {
3596                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3597                 {
3598                         std::string Type = Conf->ReadValue("bind","type",j);
3599                         std::string IP = Conf->ReadValue("bind","address",j);
3600                         long Port = Conf->ReadInteger("bind","port",j,true);
3601                         if (Type == "servers")
3602                         {
3603                                 if (IP == "*")
3604                                 {
3605                                         IP = "";
3606                                 }
3607                                 TreeSocket* listener = new TreeSocket(ServerInstance, IP.c_str(),Port,true,10);
3608                                 if (listener->GetState() == I_LISTENING)
3609                                 {
3610                                         Bindings.push_back(listener);
3611                                 }
3612                                 else
3613                                 {
3614                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3615                                         listener->Close();
3616                                         DELETE(listener);
3617                                 }
3618                         }
3619                 }
3620         }
3621         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3622         HideULines = Conf->ReadFlag("options","hideulines",0);
3623         LinkBlocks.clear();
3624         ValidIPs.clear();
3625         for (int j =0; j < Conf->Enumerate("link"); j++)
3626         {
3627                 Link L;
3628                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3629                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3630                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3631                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3632                 L.Port = Conf->ReadInteger("link","port",j,true);
3633                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3634                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3635                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3636                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3637                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3638                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3639                 /* Bugfix by brain, do not allow people to enter bad configurations */
3640                 if (L.Name != ServerInstance->Config->ServerName)
3641                 {
3642                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3643                         {
3644                                 ValidIPs.push_back(L.IPAddr);
3645
3646                                 if (Allow.length())
3647                                         ValidIPs.push_back(Allow);
3648
3649                                 /* Needs resolving */
3650                                 insp_inaddr binip;
3651                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3652                                 {
3653                                         try
3654                                         {
3655                                                 SecurityIPResolver* sr = new SecurityIPResolver(ServerInstance, L.IPAddr, L);
3656                                                 ServerInstance->AddResolver(sr);
3657                                         }
3658                                         catch (ModuleException& e)
3659                                         {
3660                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3661                                         }
3662                                 }
3663
3664                                 LinkBlocks.push_back(L);
3665                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3666                         }
3667                         else
3668                         {
3669                                 if (L.IPAddr == "")
3670                                 {
3671                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3672                                 }
3673                                 else if (L.RecvPass == "")
3674                                 {
3675                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3676                                 }
3677                                 else if (L.SendPass == "")
3678                                 {
3679                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3680                                 }
3681                                 else if (L.Name == "")
3682                                 {
3683                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3684                                 }
3685                                 else if (!L.Port)
3686                                 {
3687                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3688                                 }
3689                         }
3690                 }
3691                 else
3692                 {
3693                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3694                 }
3695         }
3696         DELETE(Conf);
3697 }
3698
3699
3700 class ModuleSpanningTree : public Module
3701 {
3702         std::vector<TreeSocket*> Bindings;
3703         int line;
3704         int NumServers;
3705         unsigned int max_local;
3706         unsigned int max_global;
3707         cmd_rconnect* command_rconnect;
3708
3709  public:
3710
3711         ModuleSpanningTree(InspIRCd* Me)
3712                 : Module::Module(Me), max_local(0), max_global(0)
3713         {
3714
3715                 Bindings.clear();
3716
3717                 ::ServerInstance = Me;
3718
3719                 // Create the root of the tree
3720                 TreeRoot = new TreeServer(ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3721
3722                 ReadConfiguration(true);
3723
3724                 command_rconnect = new cmd_rconnect(ServerInstance, this);
3725                 ServerInstance->AddCommand(command_rconnect);
3726         }
3727
3728         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3729         {
3730                 std::string Parent = TreeRoot->GetName();
3731                 if (Current->GetParent())
3732                 {
3733                         Parent = Current->GetParent()->GetName();
3734                 }
3735                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3736                 {
3737                         if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3738                         {
3739                                 if (*user->oper)
3740                                 {
3741                                          ShowLinks(Current->GetChild(q),user,hops+1);
3742                                 }
3743                         }
3744                         else
3745                         {
3746                                 ShowLinks(Current->GetChild(q),user,hops+1);
3747                         }
3748                 }
3749                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3750                 if ((HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3751                         return;
3752                 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());
3753         }
3754
3755         int CountLocalServs()
3756         {
3757                 return TreeRoot->ChildCount();
3758         }
3759
3760         int CountServs()
3761         {
3762                 return serverlist.size();
3763         }
3764
3765         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3766         {
3767                 ShowLinks(TreeRoot,user,0);
3768                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3769                 return;
3770         }
3771
3772         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3773         {
3774                 unsigned int n_users = ServerInstance->UserCount();
3775
3776                 /* Only update these when someone wants to see them, more efficient */
3777                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3778                         max_local = ServerInstance->LocalUserCount();
3779                 if (n_users > max_global)
3780                         max_global = n_users;
3781
3782                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3783                 if (ServerInstance->OperCount())
3784                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3785                 if (ServerInstance->UnregisteredUserCount())
3786                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3787                 if (ServerInstance->ChannelCount())
3788                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3789                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3790                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3791                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3792                 return;
3793         }
3794
3795         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3796
3797         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3798         {
3799                 if (line < 128)
3800                 {
3801                         for (int t = 0; t < depth; t++)
3802                         {
3803                                 matrix[line][t] = ' ';
3804                         }
3805
3806                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3807                         // a 'Spacer' String to compensate.
3808                         char spacer[40];
3809
3810                         memset(spacer,' ',40);
3811                         if ((40 - Current->GetName().length() - depth) > 1) {
3812                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3813                         }
3814                         else
3815                         {
3816                                 spacer[5] = '\0';
3817                         }
3818
3819                         float percent;
3820                         char text[80];
3821                         if (ServerInstance->clientlist.size() == 0) {
3822                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3823                                 percent = 0;
3824                         }
3825                         else
3826                         {
3827                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3828                         }
3829                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3830                         totusers += Current->GetUserCount();
3831                         totservers++;
3832                         strlcpy(&matrix[line][depth],text,80);
3833                         line++;
3834                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3835                         {
3836                                 if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3837                                 {
3838                                         if (*user->oper)
3839                                         {
3840                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3841                                         }
3842                                 }
3843                                 else
3844                                 {
3845                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3846                                 }
3847                         }
3848                 }
3849         }
3850
3851         int HandleMotd(const char** parameters, int pcnt, userrec* user)
3852         {
3853                 if (pcnt > 0)
3854                 {
3855                         /* Remote MOTD, the server is within the 1st parameter */
3856                         std::deque<std::string> params;
3857                         params.push_back(parameters[0]);
3858
3859                         /* Send it out remotely, generate no reply yet */
3860                         TreeServer* s = FindServerMask(parameters[0]);
3861                         if (s)
3862                         {
3863                                 DoOneToOne(user->nick, "MOTD", params, s->GetName());
3864                         }
3865                         else
3866                         {
3867                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3868                         }
3869                         return 1;
3870                 }
3871                 return 0;
3872         }
3873
3874         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
3875         {
3876                 if (pcnt > 0)
3877                 {
3878                         /* Remote ADMIN, the server is within the 1st parameter */
3879                         std::deque<std::string> params;
3880                         params.push_back(parameters[0]);
3881
3882                         /* Send it out remotely, generate no reply yet */
3883                         TreeServer* s = FindServerMask(parameters[0]);
3884                         if (s)
3885                         {
3886                                 DoOneToOne(user->nick, "ADMIN", params, s->GetName());
3887                         }
3888                         else
3889                         {
3890                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3891                         }
3892                         return 1;
3893                 }
3894                 return 0;
3895         }
3896
3897         int HandleStats(const char** parameters, int pcnt, userrec* user)
3898         {
3899                 if (pcnt > 1)
3900                 {
3901                         /* Remote STATS, the server is within the 2nd parameter */
3902                         std::deque<std::string> params;
3903                         params.push_back(parameters[0]);
3904                         params.push_back(parameters[1]);
3905                         /* Send it out remotely, generate no reply yet */
3906                         TreeServer* s = FindServerMask(parameters[1]);
3907                         if (s)
3908                         {
3909                                 params[1] = s->GetName();
3910                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
3911                         }
3912                         else
3913                         {
3914                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3915                         }
3916                         return 1;
3917                 }
3918                 return 0;
3919         }
3920
3921         // Ok, prepare to be confused.
3922         // After much mulling over how to approach this, it struck me that
3923         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3924         // keeping track of a ton of ascii characters, and line by line
3925         // under recursion working out where to place them using multiplications
3926         // and divisons, we instead render the map onto a backplane of characters
3927         // (a character matrix), then draw the branches as a series of "L" shapes
3928         // from the nodes. This is not only friendlier on CPU it uses less stack.
3929
3930         void HandleMap(const char** parameters, int pcnt, userrec* user)
3931         {
3932                 // This array represents a virtual screen which we will
3933                 // "scratch" draw to, as the console device of an irc
3934                 // client does not provide for a proper terminal.
3935                 float totusers = 0;
3936                 float totservers = 0;
3937                 char matrix[128][80];
3938                 for (unsigned int t = 0; t < 128; t++)
3939                 {
3940                         matrix[t][0] = '\0';
3941                 }
3942                 line = 0;
3943                 // The only recursive bit is called here.
3944                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3945                 // Process each line one by one. The algorithm has a limit of
3946                 // 128 servers (which is far more than a spanning tree should have
3947                 // anyway, so we're ok). This limit can be raised simply by making
3948                 // the character matrix deeper, 128 rows taking 10k of memory.
3949                 for (int l = 1; l < line; l++)
3950                 {
3951                         // scan across the line looking for the start of the
3952                         // servername (the recursive part of the algorithm has placed
3953                         // the servers at indented positions depending on what they
3954                         // are related to)
3955                         int first_nonspace = 0;
3956                         while (matrix[l][first_nonspace] == ' ')
3957                         {
3958                                 first_nonspace++;
3959                         }
3960                         first_nonspace--;
3961                         // Draw the `- (corner) section: this may be overwritten by
3962                         // another L shape passing along the same vertical pane, becoming
3963                         // a |- (branch) section instead.
3964                         matrix[l][first_nonspace] = '-';
3965                         matrix[l][first_nonspace-1] = '`';
3966                         int l2 = l - 1;
3967                         // Draw upwards until we hit the parent server, causing possibly
3968                         // other corners (`-) to become branches (|-)
3969                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3970                         {
3971                                 matrix[l2][first_nonspace-1] = '|';
3972                                 l2--;
3973                         }
3974                 }
3975                 // dump the whole lot to the user. This is the easy bit, honest.
3976                 for (int t = 0; t < line; t++)
3977                 {
3978                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
3979                 }
3980                 float avg_users = totusers / totservers;
3981                 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);
3982         user->WriteServ("007 %s :End of /MAP",user->nick);
3983                 return;
3984         }
3985
3986         int HandleSquit(const char** parameters, int pcnt, userrec* user)
3987         {
3988                 TreeServer* s = FindServerMask(parameters[0]);
3989                 if (s)
3990                 {
3991                         if (s == TreeRoot)
3992                         {
3993                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
3994                                 return 1;
3995                         }
3996                         TreeSocket* sock = s->GetSocket();
3997                         if (sock)
3998                         {
3999                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4000                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4001                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
4002                                 ServerInstance->SE->DelFd(sock);
4003                                 sock->Close();
4004                                 delete sock;
4005                         }
4006                         else
4007                         {
4008                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
4009                         }
4010                 }
4011                 else
4012                 {
4013                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4014                 }
4015                 return 1;
4016         }
4017
4018         int HandleTime(const char** parameters, int pcnt, userrec* user)
4019         {
4020                 if ((IS_LOCAL(user)) && (pcnt))
4021                 {
4022                         TreeServer* found = FindServerMask(parameters[0]);
4023                         if (found)
4024                         {
4025                                 // we dont' override for local server
4026                                 if (found == TreeRoot)
4027                                         return 0;
4028
4029                                 std::deque<std::string> params;
4030                                 params.push_back(found->GetName());
4031                                 params.push_back(user->nick);
4032                                 DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4033                         }
4034                         else
4035                         {
4036                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4037                         }
4038                 }
4039                 return 1;
4040         }
4041
4042         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4043         {
4044                 if ((IS_LOCAL(user)) && (pcnt > 1))
4045                 {
4046                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4047                         if ((remote) && (remote->GetFd() < 0))
4048                         {
4049                                 std::deque<std::string> params;
4050                                 params.push_back(parameters[1]);
4051                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
4052                                 return 1;
4053                         }
4054                         else if (!remote)
4055                         {
4056                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4057                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4058                                 return 1;
4059                         }
4060                 }
4061                 return 0;
4062         }
4063
4064         void DoPingChecks(time_t curtime)
4065         {
4066                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
4067                 {
4068                         TreeServer* serv = TreeRoot->GetChild(j);
4069                         TreeSocket* sock = serv->GetSocket();
4070                         if (sock)
4071                         {
4072                                 if (curtime >= serv->NextPingTime())
4073                                 {
4074                                         if (serv->AnsweredLastPing())
4075                                         {
4076                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4077                                                 serv->SetNextPingTime(curtime + 60);
4078                                         }
4079                                         else
4080                                         {
4081                                                 // they didnt answer, boot them
4082                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4083                                                 sock->Squit(serv,"Ping timeout");
4084                                                 ServerInstance->SE->DelFd(sock);
4085                                                 sock->Close();
4086                                                 delete sock;
4087                                                 return;
4088                                         }
4089                                 }
4090                         }
4091                 }
4092         }
4093
4094         void ConnectServer(Link* x)
4095         {
4096                 insp_inaddr binip;
4097
4098                 /* Do we already have an IP? If so, no need to resolve it. */
4099                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4100                 {
4101                         TreeSocket* newsocket = new TreeSocket(ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4102                         if (newsocket->GetFd() > -1)
4103                         {
4104                                 /* Handled automatically on success */
4105                         }
4106                         else
4107                         {
4108                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4109                                 delete newsocket;
4110                                 this->DoFailOver(x);
4111                         }
4112                 }
4113                 else
4114                 {
4115                         try
4116                         {
4117                                 ServernameResolver* snr = new ServernameResolver(ServerInstance,x->IPAddr, *x);
4118                                 ServerInstance->AddResolver(snr);
4119                         }
4120                         catch (ModuleException& e)
4121                         {
4122                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4123                                 this->DoFailOver(x);
4124                         }
4125                 }
4126         }
4127
4128         void DoFailOver(Link* x)
4129         {
4130                 if (x->FailOver.length())
4131                 {
4132                         if (x->FailOver == x->Name)
4133                         {
4134                                 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());
4135                                 return;
4136                         }
4137                         Link* TryThisOne = this->FindLink(x->FailOver.c_str());
4138                         if (TryThisOne)
4139                         {
4140                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
4141                                 ConnectServer(TryThisOne);
4142                         }
4143                         else
4144                         {
4145                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
4146                         }
4147                 }
4148         }
4149
4150         Link* FindLink(const std::string& name)
4151         {
4152                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4153                 {
4154                         if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
4155                         {
4156                                 return &(*x);
4157                         }
4158                 }
4159                 return NULL;
4160         }
4161
4162         void AutoConnectServers(time_t curtime)
4163         {
4164                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4165                 {
4166                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4167                         {
4168                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4169                                 x->NextConnectTime = curtime + x->AutoConnect;
4170                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4171                                 if (x->FailOver.length())
4172                                 {
4173                                         TreeServer* CheckFailOver = FindServer(x->FailOver.c_str());
4174                                         if (CheckFailOver)
4175                                         {
4176                                                 /* The failover for this server is currently a member of the network.
4177                                                  * The failover probably succeeded, where the main link did not.
4178                                                  * Don't try the main link until the failover is gone again.
4179                                                  */
4180                                                 continue;
4181                                         }
4182                                 }
4183                                 if (!CheckDupe)
4184                                 {
4185                                         // an autoconnected server is not connected. Check if its time to connect it
4186                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4187                                         this->ConnectServer(&(*x));
4188                                 }
4189                         }
4190                 }
4191         }
4192
4193         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4194         {
4195                 // we've already checked if pcnt > 0, so this is safe
4196                 TreeServer* found = FindServerMask(parameters[0]);
4197                 if (found)
4198                 {
4199                         std::string Version = found->GetVersion();
4200                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4201                         if (found == TreeRoot)
4202                         {
4203                                 std::stringstream out(ServerInstance->Config->data005);
4204                                 std::string token = "";
4205                                 std::string line5 = "";
4206                                 int token_counter = 0;
4207
4208                                 while (!out.eof())
4209                                 {
4210                                         out >> token;
4211                                         line5 = line5 + token + " ";
4212                                         token_counter++;
4213
4214                                         if ((token_counter >= 13) || (out.eof() == true))
4215                                         {
4216                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4217                                                 line5 = "";
4218                                                 token_counter = 0;
4219                                         }
4220                                 }
4221                         }
4222                 }
4223                 else
4224                 {
4225                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4226                 }
4227                 return 1;
4228         }
4229
4230         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4231         {
4232                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4233                 {
4234                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4235                         {
4236                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4237                                 if (!CheckDupe)
4238                                 {
4239                                         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);
4240                                         ConnectServer(&(*x));
4241                                         return 1;
4242                                 }
4243                                 else
4244                                 {
4245                                         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());
4246                                         return 1;
4247                                 }
4248                         }
4249                 }
4250                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4251                 return 1;
4252         }
4253
4254         virtual int OnStats(char statschar, userrec* user, string_list &results)
4255         {
4256                 if (statschar == 'c')
4257                 {
4258                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
4259                         {
4260                                 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');
4261                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
4262                         }
4263                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4264                         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);
4265                         return 1;
4266                 }
4267                 return 0;
4268         }
4269
4270         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4271         {
4272                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4273                 if (!validated)
4274                         return 0;
4275
4276                 if (command == "CONNECT")
4277                 {
4278                         return this->HandleConnect(parameters,pcnt,user);
4279                 }
4280                 else if (command == "STATS")
4281                 {
4282                         return this->HandleStats(parameters,pcnt,user);
4283                 }
4284                 else if (command == "MOTD")
4285                 {
4286                         return this->HandleMotd(parameters,pcnt,user);
4287                 }
4288                 else if (command == "ADMIN")
4289                 {
4290                         return this->HandleAdmin(parameters,pcnt,user);
4291                 }
4292                 else if (command == "SQUIT")
4293                 {
4294                         return this->HandleSquit(parameters,pcnt,user);
4295                 }
4296                 else if (command == "MAP")
4297                 {
4298                         this->HandleMap(parameters,pcnt,user);
4299                         return 1;
4300                 }
4301                 else if ((command == "TIME") && (pcnt > 0))
4302                 {
4303                         return this->HandleTime(parameters,pcnt,user);
4304                 }
4305                 else if (command == "LUSERS")
4306                 {
4307                         this->HandleLusers(parameters,pcnt,user);
4308                         return 1;
4309                 }
4310                 else if (command == "LINKS")
4311                 {
4312                         this->HandleLinks(parameters,pcnt,user);
4313                         return 1;
4314                 }
4315                 else if (command == "WHOIS")
4316                 {
4317                         if (pcnt > 1)
4318                         {
4319                                 // remote whois
4320                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4321                         }
4322                 }
4323                 else if ((command == "VERSION") && (pcnt > 0))
4324                 {
4325                         this->HandleVersion(parameters,pcnt,user);
4326                         return 1;
4327                 }
4328
4329                 return 0;
4330         }
4331
4332         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4333         {
4334                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4335                 {
4336                         // this bit of code cleverly routes all module commands
4337                         // to all remote severs *automatically* so that modules
4338                         // can just handle commands locally, without having
4339                         // to have any special provision in place for remote
4340                         // commands and linking protocols.
4341                         std::deque<std::string> params;
4342                         params.clear();
4343                         for (int j = 0; j < pcnt; j++)
4344                         {
4345                                 if (strchr(parameters[j],' '))
4346                                 {
4347                                         params.push_back(":" + std::string(parameters[j]));
4348                                 }
4349                                 else
4350                                 {
4351                                         params.push_back(std::string(parameters[j]));
4352                                 }
4353                         }
4354                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4355                         DoOneToMany(user->nick,command,params);
4356                 }
4357         }
4358
4359         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4360         {
4361                 TreeServer* s = FindServer(servername);
4362                 if (s)
4363                 {
4364                         description = s->GetDesc();
4365                 }
4366         }
4367
4368         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4369         {
4370                 if (IS_LOCAL(source))
4371                 {
4372                         std::deque<std::string> params;
4373                         params.push_back(dest->nick);
4374                         params.push_back(channel->name);
4375                         DoOneToMany(source->nick,"INVITE",params);
4376                 }
4377         }
4378
4379         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4380         {
4381                 std::deque<std::string> params;
4382                 params.push_back(chan->name);
4383                 params.push_back(":"+topic);
4384                 DoOneToMany(user->nick,"TOPIC",params);
4385         }
4386
4387         virtual void OnWallops(userrec* user, const std::string &text)
4388         {
4389                 if (IS_LOCAL(user))
4390                 {
4391                         std::deque<std::string> params;
4392                         params.push_back(":"+text);
4393                         DoOneToMany(user->nick,"WALLOPS",params);
4394                 }
4395         }
4396
4397         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4398         {
4399                 if (target_type == TYPE_USER)
4400                 {
4401                         userrec* d = (userrec*)dest;
4402                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4403                         {
4404                                 std::deque<std::string> params;
4405                                 params.clear();
4406                                 params.push_back(d->nick);
4407                                 params.push_back(":"+text);
4408                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4409                         }
4410                 }
4411                 else if (target_type == TYPE_CHANNEL)
4412                 {
4413                         if (IS_LOCAL(user))
4414                         {
4415                                 chanrec *c = (chanrec*)dest;
4416                                 if (c)
4417                                 {
4418                                         std::string cname = c->name;
4419                                         if (status)
4420                                                 cname = status + cname;
4421                                         std::deque<TreeServer*> list;
4422                                         GetListOfServersForChannel(c,list);
4423                                         unsigned int ucount = list.size();
4424                                         for (unsigned int i = 0; i < ucount; i++)
4425                                         {
4426                                                 TreeSocket* Sock = list[i]->GetSocket();
4427                                                 if (Sock)
4428                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4429                                         }
4430                                 }
4431                         }
4432                 }
4433                 else if (target_type == TYPE_SERVER)
4434                 {
4435                         if (IS_LOCAL(user))
4436                         {
4437                                 char* target = (char*)dest;
4438                                 std::deque<std::string> par;
4439                                 par.push_back(target);
4440                                 par.push_back(":"+text);
4441                                 DoOneToMany(user->nick,"NOTICE",par);
4442                         }
4443                 }
4444         }
4445
4446         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4447         {
4448                 if (target_type == TYPE_USER)
4449                 {
4450                         // route private messages which are targetted at clients only to the server
4451                         // which needs to receive them
4452                         userrec* d = (userrec*)dest;
4453                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4454                         {
4455                                 std::deque<std::string> params;
4456                                 params.clear();
4457                                 params.push_back(d->nick);
4458                                 params.push_back(":"+text);
4459                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4460                         }
4461                 }
4462                 else if (target_type == TYPE_CHANNEL)
4463                 {
4464                         if (IS_LOCAL(user))
4465                         {
4466                                 chanrec *c = (chanrec*)dest;
4467                                 if (c)
4468                                 {
4469                                         std::string cname = c->name;
4470                                         if (status)
4471                                                 cname = status + cname;
4472                                         std::deque<TreeServer*> list;
4473                                         GetListOfServersForChannel(c,list);
4474                                         unsigned int ucount = list.size();
4475                                         for (unsigned int i = 0; i < ucount; i++)
4476                                         {
4477                                                 TreeSocket* Sock = list[i]->GetSocket();
4478                                                 if (Sock)
4479                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4480                                         }
4481                                 }
4482                         }
4483                 }
4484                 else if (target_type == TYPE_SERVER)
4485                 {
4486                         if (IS_LOCAL(user))
4487                         {
4488                                 char* target = (char*)dest;
4489                                 std::deque<std::string> par;
4490                                 par.push_back(target);
4491                                 par.push_back(":"+text);
4492                                 DoOneToMany(user->nick,"PRIVMSG",par);
4493                         }
4494                 }
4495         }
4496
4497         virtual void OnBackgroundTimer(time_t curtime)
4498         {
4499                 AutoConnectServers(curtime);
4500                 DoPingChecks(curtime);
4501         }
4502
4503         virtual void OnUserJoin(userrec* user, chanrec* channel)
4504         {
4505                 // Only do this for local users
4506                 if (IS_LOCAL(user))
4507                 {
4508                         std::deque<std::string> params;
4509                         params.clear();
4510                         params.push_back(channel->name);
4511                         // set up their permissions and the channel TS with FJOIN.
4512                         // All users are FJOINed now, because a module may specify
4513                         // new joining permissions for the user.
4514                         params.clear();
4515                         params.push_back(channel->name);
4516                         params.push_back(ConvToStr(channel->age));
4517                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4518                         DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4519                 }
4520         }
4521
4522         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4523         {
4524                 // only occurs for local clients
4525                 if (user->registered != REG_ALL)
4526                         return;
4527                 std::deque<std::string> params;
4528                 params.push_back(newhost);
4529                 DoOneToMany(user->nick,"FHOST",params);
4530         }
4531
4532         virtual void OnChangeName(userrec* user, const std::string &gecos)
4533         {
4534                 // only occurs for local clients
4535                 if (user->registered != REG_ALL)
4536                         return;
4537                 std::deque<std::string> params;
4538                 params.push_back(gecos);
4539                 DoOneToMany(user->nick,"FNAME",params);
4540         }
4541
4542         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4543         {
4544                 if (IS_LOCAL(user))
4545                 {
4546                         std::deque<std::string> params;
4547                         params.push_back(channel->name);
4548                         if (partmessage != "")
4549                                 params.push_back(":"+partmessage);
4550                         DoOneToMany(user->nick,"PART",params);
4551                 }
4552         }
4553
4554         virtual void OnUserConnect(userrec* user)
4555         {
4556                 char agestr[MAXBUF];
4557                 if (IS_LOCAL(user))
4558                 {
4559                         std::deque<std::string> params;
4560                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4561                         params.push_back(agestr);
4562                         params.push_back(user->nick);
4563                         params.push_back(user->host);
4564                         params.push_back(user->dhost);
4565                         params.push_back(user->ident);
4566                         params.push_back("+"+std::string(user->FormatModes()));
4567                         params.push_back(user->GetIPString());
4568                         params.push_back(":"+std::string(user->fullname));
4569                         DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4570
4571                         // User is Local, change needs to be reflected!
4572                         TreeServer* SourceServer = FindServer(user->server);
4573                         if (SourceServer)
4574                         {
4575                                 SourceServer->AddUserCount();
4576                         }
4577
4578                 }
4579         }
4580
4581         virtual void OnUserQuit(userrec* user, const std::string &reason)
4582         {
4583                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4584                 {
4585                         std::deque<std::string> params;
4586                         params.push_back(":"+reason);
4587                         DoOneToMany(user->nick,"QUIT",params);
4588                 }
4589                 // Regardless, We need to modify the user Counts..
4590                 TreeServer* SourceServer = FindServer(user->server);
4591                 if (SourceServer)
4592                 {
4593                         SourceServer->DelUserCount();
4594                 }
4595
4596         }
4597
4598         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4599         {
4600                 if (IS_LOCAL(user))
4601                 {
4602                         std::deque<std::string> params;
4603                         params.push_back(user->nick);
4604                         DoOneToMany(oldnick,"NICK",params);
4605                 }
4606         }
4607
4608         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4609         {
4610                 if ((source) && (IS_LOCAL(source)))
4611                 {
4612                         std::deque<std::string> params;
4613                         params.push_back(chan->name);
4614                         params.push_back(user->nick);
4615                         params.push_back(":"+reason);
4616                         DoOneToMany(source->nick,"KICK",params);
4617                 }
4618                 else if (!source)
4619                 {
4620                         std::deque<std::string> params;
4621                         params.push_back(chan->name);
4622                         params.push_back(user->nick);
4623                         params.push_back(":"+reason);
4624                         DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4625                 }
4626         }
4627
4628         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4629         {
4630                 std::deque<std::string> params;
4631                 params.push_back(dest->nick);
4632                 params.push_back(":"+reason);
4633                 DoOneToMany(source->nick,"KILL",params);
4634         }
4635
4636         virtual void OnRehash(const std::string &parameter)
4637         {
4638                 if (parameter != "")
4639                 {
4640                         std::deque<std::string> params;
4641                         params.push_back(parameter);
4642                         DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4643                         // check for self
4644                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4645                         {
4646                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4647                                 ServerInstance->RehashServer();
4648                         }
4649                 }
4650                 ReadConfiguration(false);
4651         }
4652
4653         // note: the protocol does not allow direct umode +o except
4654         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4655         // locally.
4656         virtual void OnOper(userrec* user, const std::string &opertype)
4657         {
4658                 if (IS_LOCAL(user))
4659                 {
4660                         std::deque<std::string> params;
4661                         params.push_back(opertype);
4662                         DoOneToMany(user->nick,"OPERTYPE",params);
4663                 }
4664         }
4665
4666         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4667         {
4668                 if (IS_LOCAL(source))
4669                 {
4670                         char type[8];
4671                         snprintf(type,8,"%cLINE",linetype);
4672                         std::string stype = type;
4673                         if (adding)
4674                         {
4675                                 char sduration[MAXBUF];
4676                                 snprintf(sduration,MAXBUF,"%ld",duration);
4677                                 std::deque<std::string> params;
4678                                 params.push_back(host);
4679                                 params.push_back(sduration);
4680                                 params.push_back(":"+reason);
4681                                 DoOneToMany(source->nick,stype,params);
4682                         }
4683                         else
4684                         {
4685                                 std::deque<std::string> params;
4686                                 params.push_back(host);
4687                                 DoOneToMany(source->nick,stype,params);
4688                         }
4689                 }
4690         }
4691
4692         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4693         {
4694                 OnLine(source,hostmask,true,'G',duration,reason);
4695         }
4696
4697         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4698         {
4699                 OnLine(source,ipmask,true,'Z',duration,reason);
4700         }
4701
4702         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4703         {
4704                 OnLine(source,nickmask,true,'Q',duration,reason);
4705         }
4706
4707         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4708         {
4709                 OnLine(source,hostmask,true,'E',duration,reason);
4710         }
4711
4712         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4713         {
4714                 OnLine(source,hostmask,false,'G',0,"");
4715         }
4716
4717         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4718         {
4719                 OnLine(source,ipmask,false,'Z',0,"");
4720         }
4721
4722         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4723         {
4724                 OnLine(source,nickmask,false,'Q',0,"");
4725         }
4726
4727         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4728         {
4729                 OnLine(source,hostmask,false,'E',0,"");
4730         }
4731
4732         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4733         {
4734                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4735                 {
4736                         if (target_type == TYPE_USER)
4737                         {
4738                                 userrec* u = (userrec*)dest;
4739                                 std::deque<std::string> params;
4740                                 params.push_back(u->nick);
4741                                 params.push_back(text);
4742                                 DoOneToMany(user->nick,"MODE",params);
4743                         }
4744                         else
4745                         {
4746                                 chanrec* c = (chanrec*)dest;
4747                                 std::deque<std::string> params;
4748                                 params.push_back(c->name);
4749                                 params.push_back(text);
4750                                 DoOneToMany(user->nick,"MODE",params);
4751                         }
4752                 }
4753         }
4754
4755         virtual void OnSetAway(userrec* user)
4756         {
4757                 if (IS_LOCAL(user))
4758                 {
4759                         std::deque<std::string> params;
4760                         params.push_back(":"+std::string(user->awaymsg));
4761                         DoOneToMany(user->nick,"AWAY",params);
4762                 }
4763         }
4764
4765         virtual void OnCancelAway(userrec* user)
4766         {
4767                 if (IS_LOCAL(user))
4768                 {
4769                         std::deque<std::string> params;
4770                         params.clear();
4771                         DoOneToMany(user->nick,"AWAY",params);
4772                 }
4773         }
4774
4775         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4776         {
4777                 TreeSocket* s = (TreeSocket*)opaque;
4778                 if (target)
4779                 {
4780                         if (target_type == TYPE_USER)
4781                         {
4782                                 userrec* u = (userrec*)target;
4783                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4784                         }
4785                         else
4786                         {
4787                                 chanrec* c = (chanrec*)target;
4788                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4789                         }
4790                 }
4791         }
4792
4793         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4794         {
4795                 TreeSocket* s = (TreeSocket*)opaque;
4796                 if (target)
4797                 {
4798                         if (target_type == TYPE_USER)
4799                         {
4800                                 userrec* u = (userrec*)target;
4801                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4802                         }
4803                         else if (target_type == TYPE_OTHER)
4804                         {
4805                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4806                         }
4807                         else if (target_type == TYPE_CHANNEL)
4808                         {
4809                                 chanrec* c = (chanrec*)target;
4810                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4811                         }
4812                 }
4813         }
4814
4815         virtual void OnEvent(Event* event)
4816         {
4817                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4818
4819                 if (event->GetEventID() == "send_metadata")
4820                 {
4821                         if (params->size() < 3)
4822                                 return;
4823                         (*params)[2] = ":" + (*params)[2];
4824                         DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4825                 }
4826                 else if (event->GetEventID() == "send_topic")
4827                 {
4828                         if (params->size() < 2)
4829                                 return;
4830                         (*params)[1] = ":" + (*params)[1];
4831                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
4832                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time()));
4833                         DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
4834                 }
4835                 else if (event->GetEventID() == "send_mode")
4836                 {
4837                         if (params->size() < 2)
4838                                 return;
4839                         // Insert the TS value of the object, either userrec or chanrec
4840                         time_t ourTS = 0;
4841                         userrec* a = ServerInstance->FindNick((*params)[0]);
4842                         if (a)
4843                         {
4844                                 ourTS = a->age;
4845                         }
4846                         else
4847                         {
4848                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4849                                 if (a)
4850                                 {
4851                                         ourTS = a->age;
4852                                 }
4853                         }
4854                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4855                         DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4856                 }
4857         }
4858
4859         virtual ~ModuleSpanningTree()
4860         {
4861         }
4862
4863         virtual Version GetVersion()
4864         {
4865                 return Version(1,1,0,2,VF_STATIC|VF_VENDOR,API_VERSION);
4866         }
4867
4868         void Implements(char* List)
4869         {
4870                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
4871                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
4872                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
4873                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
4874                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
4875                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
4876                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
4877         }
4878
4879         /* It is IMPORTANT that m_spanningtree is the last module in the chain
4880          * so that any activity it sees is FINAL, e.g. we arent going to send out
4881          * a NICK message before m_cloaking has finished putting the +x on the user,
4882          * etc etc.
4883          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
4884          * the module call queue.
4885          */
4886         Priority Prioritize()
4887         {
4888                 return PRIORITY_LAST;
4889         }
4890 };
4891
4892 void DoFailOver(Link* x)
4893 {
4894         TreeProtocolModule->DoFailOver(x);
4895 }
4896
4897 Link* FindLink(const std::string& name)
4898 {
4899         return TreeProtocolModule->FindLink(name);
4900 }
4901
4902 class ModuleSpanningTreeFactory : public ModuleFactory
4903 {
4904  public:
4905         ModuleSpanningTreeFactory()
4906         {
4907         }
4908
4909         ~ModuleSpanningTreeFactory()
4910         {
4911         }
4912
4913         virtual Module * CreateModule(InspIRCd* Me)
4914         {
4915                 TreeProtocolModule = new ModuleSpanningTree(Me);
4916                 return TreeProtocolModule;
4917         }
4918
4919 };
4920
4921
4922 extern "C" void * init_module( void )
4923 {
4924         return new ModuleSpanningTreeFactory;
4925 }