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                                 char* nm = new char[MAXBUF];
1589                                 char* tnm = nm;
1590
1591                                 while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
1592                                 {
1593                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1594                                         if (mh)
1595                                         {
1596                                                 ntimes++;
1597                                                 *tnm++ = mh->GetModeChar();
1598                                         }
1599                                         else
1600                                         {
1601                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
1602                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
1603                                                 return false;
1604                                         }
1605                                         usr++;
1606                                         permissions++;
1607                                 }
1608
1609                                 *tnm = 0;
1610                                 usr++;
1611
1612                                 who = this->Instance->FindNick(usr);
1613                                 if (who)
1614                                 {
1615                                         /* Did they get any modes? How many times? */
1616                                         strlcat(modestring, nm, MAXBUF);
1617                                         for (int k = 0; k < ntimes; k++)
1618                                                 mode_users[modectr++] = strdup(usr);
1619
1620                                         delete[] nm;
1621
1622                                         TreeServer* route_back_again = BestRouteTo(who->server);
1623                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
1624                                         {
1625                                                 Instance->Log(DEBUG,"Fake direction in FJOIN, user '%s'",who->nick);
1626                                                 continue;
1627                                         }
1628                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, key);
1629                                         if (modectr >= (MAXMODES-1))
1630                                         {
1631                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1632                                                  * if there are more than MAXMODES to go.
1633                                                  */
1634                                                 if (ourTS >= TS)
1635                                                 {
1636                                                         /* We also always let u-lined clients win, no matter what the TS value */
1637                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1638                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1639                                                         if (ourTS != TS)
1640                                                         {
1641                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1642                                                                 chan->age = TS;
1643                                                                 ourTS = TS;
1644                                                         }
1645                                                 }
1646                                                 strcpy(mode_users[1],"+");
1647                                                 for (unsigned int f = 2; f < modectr; f++)
1648                                                         free(mode_users[f]);
1649                                                 modectr = 2;
1650                                         }
1651                                 }
1652                                 else
1653                                 {
1654                                         delete[] nm;
1655                                         Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
1656                                         continue;
1657                                 }
1658                         }
1659                 }
1660                 /* there werent enough modes built up to flush it during FJOIN,
1661                  * or, there are a number left over. flush them out.
1662                  */
1663                 if ((modectr > 2) && (who) && (chan))
1664                 {
1665                         if (ourTS >= TS)
1666                         {
1667                                 Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1668                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1669                                 if (ourTS != TS)
1670                                 {
1671                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1672                                         chan->age = TS;
1673                                         ourTS = TS;
1674                                 }
1675                         }
1676
1677                         for (unsigned int f = 2; f < modectr; f++)
1678                                 free(mode_users[f]);
1679                 }
1680                 return true;
1681         }
1682
1683         /** NICK command */
1684         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1685         {
1686                 if (params.size() < 8)
1687                         return true;
1688                 if (params.size() > 8)
1689                 {
1690                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1691                         return true;
1692                 }
1693                 // NICK age nick host dhost ident +modes ip :gecos
1694                 //       0    1   2     3     4      5   6     7
1695                 time_t age = atoi(params[0].c_str());
1696
1697                 /* This used to have a pretty craq'y loop doing the same thing,
1698                  * now we just let the STL do the hard work (more efficiently)
1699                  */
1700                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1701                 if (pos_after_plus != std::string::npos)
1702                         params[5] = params[5].substr(pos_after_plus);
1703
1704                 const char* tempnick = params[1].c_str();
1705                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1706
1707                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1708
1709                 if (iter != this->Instance->clientlist.end())
1710                 {
1711                         // nick collision
1712                         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);
1713                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1714                         return true;
1715                 }
1716
1717                 userrec* _new = new userrec(this->Instance);
1718                 this->Instance->clientlist[tempnick] = _new;
1719                 _new->SetFd(FD_MAGIC_NUMBER);
1720                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1721                 strlcpy(_new->host, params[2].c_str(),63);
1722                 strlcpy(_new->dhost, params[3].c_str(),63);
1723                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1724                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1725                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1726                 _new->registered = REG_ALL;
1727                 _new->signon = age;
1728
1729                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1730                         _new->modes[(*v)-65] = 1;
1731
1732 #ifdef SUPPORT_IP6LINKS
1733                 if (params[6].find_first_of(":") != std::string::npos)
1734                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1735                 else
1736 #endif
1737                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1738
1739                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1740
1741                 params[7] = ":" + params[7];
1742                 DoOneToAllButSender(source,"NICK",params,source);
1743
1744                 // Increment the Source Servers User Count..
1745                 TreeServer* SourceServer = FindServer(source);
1746                 if (SourceServer)
1747                 {
1748                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1749                         SourceServer->AddUserCount();
1750                 }
1751
1752                 FOREACH_MOD(I_OnPostConnect,OnPostConnect(_new));
1753
1754                 return true;
1755         }
1756
1757         /** Send one or more FJOINs for a channel of users.
1758          * If the length of a single line is more than 480-NICKMAX
1759          * in length, it is split over multiple lines.
1760          */
1761         void SendFJoins(TreeServer* Current, chanrec* c)
1762         {
1763                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1764                 char list[MAXBUF];
1765                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1766
1767                 size_t dlen, curlen;
1768                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1769                 int numusers = 0;
1770                 char* ptr = list + dlen;
1771
1772                 CUList *ulist = c->GetUsers();
1773                 std::vector<userrec*> specific_halfop;
1774                 std::vector<userrec*> specific_voice;
1775                 std::string modes = "";
1776                 std::string params = "";
1777
1778                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1779                 {
1780                         // The first parameter gets a : before it
1781                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1782
1783                         curlen += ptrlen;
1784                         ptr += ptrlen;
1785
1786                         numusers++;
1787
1788                         if (curlen > (480-NICKMAX))
1789                         {
1790                                 this->WriteLine(list);
1791                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1792                                 ptr = list + dlen;
1793                                 ptrlen = 0;
1794                                 numusers = 0;
1795                         }
1796                 }
1797
1798                 if (numusers)
1799                         this->WriteLine(list);
1800
1801                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1802                 {
1803                         modes.append("b");
1804                         params.append(b->data).append(" ");
1805                 }
1806                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1807         }
1808
1809         /** Send G, Q, Z and E lines */
1810         void SendXLines(TreeServer* Current)
1811         {
1812                 char data[MAXBUF];
1813                 std::string n = this->Instance->Config->ServerName;
1814                 const char* sn = n.c_str();
1815                 int iterations = 0;
1816                 /* Yes, these arent too nice looking, but they get the job done */
1817                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1818                 {
1819                         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);
1820                         this->WriteLine(data);
1821                 }
1822                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1823                 {
1824                         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);
1825                         this->WriteLine(data);
1826                 }
1827                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1828                 {
1829                         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);
1830                         this->WriteLine(data);
1831                 }
1832                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1833                 {
1834                         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);
1835                         this->WriteLine(data);
1836                 }
1837                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1838                 {
1839                         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);
1840                         this->WriteLine(data);
1841                 }
1842                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1843                 {
1844                         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);
1845                         this->WriteLine(data);
1846                 }
1847                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1848                 {
1849                         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);
1850                         this->WriteLine(data);
1851                 }
1852                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1853                 {
1854                         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);
1855                         this->WriteLine(data);
1856                 }
1857         }
1858
1859         /** Send channel modes and topics */
1860         void SendChannelModes(TreeServer* Current)
1861         {
1862                 char data[MAXBUF];
1863                 std::deque<std::string> list;
1864                 int iterations = 0;
1865                 std::string n = this->Instance->Config->ServerName;
1866                 const char* sn = n.c_str();
1867                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1868                 {
1869                         SendFJoins(Current, c->second);
1870                         if (*c->second->topic)
1871                         {
1872                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1873                                 this->WriteLine(data);
1874                         }
1875                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1876                         list.clear();
1877                         c->second->GetExtList(list);
1878                         for (unsigned int j = 0; j < list.size(); j++)
1879                         {
1880                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1881                         }
1882                 }
1883         }
1884
1885         /** send all users and their oper state/modes */
1886         void SendUsers(TreeServer* Current)
1887         {
1888                 char data[MAXBUF];
1889                 std::deque<std::string> list;
1890                 int iterations = 0;
1891                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
1892                 {
1893                         if (u->second->registered == REG_ALL)
1894                         {
1895                                 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);
1896                                 this->WriteLine(data);
1897                                 if (*u->second->oper)
1898                                 {
1899                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1900                                 }
1901                                 if (*u->second->awaymsg)
1902                                 {
1903                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1904                                 }
1905                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1906                                 list.clear();
1907                                 u->second->GetExtList(list);
1908                                 for (unsigned int j = 0; j < list.size(); j++)
1909                                 {
1910                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1911                                 }
1912                         }
1913                 }
1914         }
1915
1916         /** This function is called when we want to send a netburst to a local
1917          * server. There is a set order we must do this, because for example
1918          * users require their servers to exist, and channels require their
1919          * users to exist. You get the idea.
1920          */
1921         void DoBurst(TreeServer* s)
1922         {
1923                 std::string burst = "BURST "+ConvToStr(time(NULL));
1924                 std::string endburst = "ENDBURST";
1925                 // Because by the end of the netburst, it  could be gone!
1926                 std::string name = s->GetName();
1927                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
1928                 this->WriteLine(burst);
1929                 /* send our version string */
1930                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
1931                 /* Send server tree */
1932                 this->SendServers(TreeRoot,s,1);
1933                 /* Send users and their oper status */
1934                 this->SendUsers(s);
1935                 /* Send everything else (channel modes, xlines etc) */
1936                 this->SendChannelModes(s);
1937                 this->SendXLines(s);
1938                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1939                 this->WriteLine(endburst);
1940                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
1941         }
1942
1943         /** This function is called when we receive data from a remote
1944          * server. We buffer the data in a std::string (it doesnt stay
1945          * there for long), reading using InspSocket::Read() which can
1946          * read up to 16 kilobytes in one operation.
1947          *
1948          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1949          * THE SOCKET OBJECT FOR US.
1950          */
1951         virtual bool OnDataReady()
1952         {
1953                 char* data = this->Read();
1954                 /* Check that the data read is a valid pointer and it has some content */
1955                 if (data && *data)
1956                 {
1957                         this->in_buffer.append(data);
1958                         /* While there is at least one new line in the buffer,
1959                          * do something useful (we hope!) with it.
1960                          */
1961                         while (in_buffer.find("\n") != std::string::npos)
1962                         {
1963                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1964                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1965                                 if (ret.find("\r") != std::string::npos)
1966                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1967                                 /* Process this one, abort if it
1968                                  * didnt return true.
1969                                  */
1970                                 if (this->ctx_in)
1971                                 {
1972                                         char out[1024];
1973                                         char result[1024];
1974                                         memset(result,0,1024);
1975                                         memset(out,0,1024);
1976                                         Instance->Log(DEBUG,"Original string '%s'",ret.c_str());
1977                                         /* ERROR + CAPAB is still allowed unencryped */
1978                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1979                                         {
1980                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1981                                                 if ((nbytes > 0) && (nbytes < 1024))
1982                                                 {
1983                                                         Instance->Log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1984                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1985                                                         for (int t = 0; t < nbytes; t++)
1986                                                                 if (result[t] == '\7') result[t] = 0;
1987                                                         ret = result;
1988                                                 }
1989                                         }
1990                                 }
1991                                 if (!this->ProcessLine(ret))
1992                                 {
1993                                         Instance->Log(DEBUG,"ProcessLine says no!");
1994                                         return false;
1995                                 }
1996                         }
1997                         return true;
1998                 }
1999                 /* EAGAIN returns an empty but non-NULL string, so this
2000                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2001                  */
2002                 return (data && !*data);
2003         }
2004
2005         int WriteLine(std::string line)
2006         {
2007                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2008                 if (this->ctx_out)
2009                 {
2010                         char result[10240];
2011                         char result64[10240];
2012                         if (this->keylength)
2013                         {
2014                                 // pad it to the key length
2015                                 int n = this->keylength - (line.length() % this->keylength);
2016                                 if (n)
2017                                 {
2018                                         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);
2019                                         line.append(n,'\7');
2020                                 }
2021                         }
2022                         unsigned int ll = line.length();
2023                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2024                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2025                         line = result64;
2026                         //int from64tobits(char *out, const char *in, int maxlen);
2027                 }
2028                 return this->Write(line + "\r\n");
2029         }
2030
2031         /* Handle ERROR command */
2032         bool Error(std::deque<std::string> &params)
2033         {
2034                 if (params.size() < 1)
2035                         return false;
2036                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2037                 /* we will return false to cause the socket to close. */
2038                 return false;
2039         }
2040
2041         /** remote MOTD. leet, huh? */
2042         bool Motd(std::string prefix, std::deque<std::string> &params)
2043         {
2044                 if (params.size() > 0)
2045                 {
2046                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2047                         {
2048                                 /* It's for our server */
2049                                 string_list results;
2050                                 userrec* source = this->Instance->FindNick(prefix);
2051
2052                                 if (source)
2053                                 {
2054                                         std::deque<std::string> par;
2055                                         par.push_back(prefix);
2056                                         par.push_back("");
2057
2058                                         if (!Instance->Config->MOTD.size())
2059                                         {
2060                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2061                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2062                                                 return true;
2063                                         }
2064
2065                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2066                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2067
2068                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2069                                         {
2070                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2071                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2072                                         }
2073
2074                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2075                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2076                                 }
2077                         }
2078                         else
2079                         {
2080                                 /* Pass it on */
2081                                 userrec* source = this->Instance->FindNick(prefix);
2082                                 if (source)
2083                                         DoOneToOne(prefix, "MOTD", params, params[0]);
2084                         }
2085                 }
2086                 return true;
2087         }
2088
2089         /** remote ADMIN. leet, huh? */
2090         bool Admin(std::string prefix, std::deque<std::string> &params)
2091         {
2092                 if (params.size() > 0)
2093                 {
2094                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2095                         {
2096                                 /* It's for our server */
2097                                 string_list results;
2098                                 userrec* source = this->Instance->FindNick(prefix);
2099
2100                                 if (source)
2101                                 {
2102                                         std::deque<std::string> par;
2103                                         par.push_back(prefix);
2104                                         par.push_back("");
2105
2106                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2107                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2108
2109                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2110                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2111
2112                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2113                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2114
2115                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2116                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2117                                 }
2118                         }
2119                         else
2120                         {
2121                                 /* Pass it on */
2122                                 userrec* source = this->Instance->FindNick(prefix);
2123                                 if (source)
2124                                         DoOneToOne(prefix, "ADMIN", params, params[0]);
2125                         }
2126                 }
2127                 return true;
2128         }
2129
2130         bool Stats(std::string prefix, std::deque<std::string> &params)
2131         {
2132                 /* Get the reply to a STATS query if it matches this servername,
2133                  * and send it back as a load of PUSH queries
2134                  */
2135                 if (params.size() > 1)
2136                 {
2137                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2138                         {
2139                                 /* It's for our server */
2140                                 string_list results;
2141                                 userrec* source = this->Instance->FindNick(prefix);
2142                                 if (source)
2143                                 {
2144                                         std::deque<std::string> par;
2145                                         par.push_back(prefix);
2146                                         par.push_back("");
2147                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2148                                         for (size_t i = 0; i < results.size(); i++)
2149                                         {
2150                                                 par[1] = "::" + results[i];
2151                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2152                                         }
2153                                 }
2154                         }
2155                         else
2156                         {
2157                                 /* Pass it on */
2158                                 userrec* source = this->Instance->FindNick(prefix);
2159                                 if (source)
2160                                         DoOneToOne(prefix, "STATS", params, params[1]);
2161                         }
2162                 }
2163                 return true;
2164         }
2165
2166
2167         /** Because the core won't let users or even SERVERS set +o,
2168          * we use the OPERTYPE command to do this.
2169          */
2170         bool OperType(std::string prefix, std::deque<std::string> &params)
2171         {
2172                 if (params.size() != 1)
2173                 {
2174                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2175                         return true;
2176                 }
2177                 std::string opertype = params[0];
2178                 userrec* u = this->Instance->FindNick(prefix);
2179                 if (u)
2180                 {
2181                         u->modes[UM_OPERATOR] = 1;
2182                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2183                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2184                 }
2185                 return true;
2186         }
2187
2188         /** Because Andy insists that services-compatible servers must
2189          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2190          */
2191         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2192         {
2193                 if (params.size() < 3)
2194                         return true;
2195
2196                 userrec* u = this->Instance->FindNick(params[0]);
2197
2198                 if (u)
2199                 {
2200                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2201                         if (IS_LOCAL(u))
2202                         {
2203                                 std::deque<std::string> par;
2204                                 par.push_back(params[1]);
2205                                 /* This is not required as one is sent in OnUserPostNick below
2206                                  */
2207                                 //DoOneToMany(u->nick,"NICK",par);
2208                                 if (!u->ForceNickChange(params[1].c_str()))
2209                                 {
2210                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2211                                         return true;
2212                                 }
2213                                 u->age = atoi(params[2].c_str());
2214                         }
2215                 }
2216                 return true;
2217         }
2218
2219         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2220         {
2221                 if (params.size() < 2)
2222                         return true;
2223
2224                 userrec* u = this->Instance->FindNick(params[0]);
2225
2226                 if (u)
2227                 {
2228                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2229                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2230                 }
2231                 return true;
2232         }
2233
2234         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2235         {
2236                 if (params.size() < 1)
2237                         return false;
2238
2239                 std::string servermask = params[0];
2240
2241                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2242                 {
2243                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2244                         this->Instance->RehashServer();
2245                         ReadConfiguration(false);
2246                         InitializeDisabledCommands(ServerInstance->Config->DisabledCommands, ServerInstance);
2247                 }
2248                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2249                 return true;
2250         }
2251
2252         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2253         {
2254                 if (params.size() != 2)
2255                         return true;
2256
2257                 std::string nick = params[0];
2258                 userrec* u = this->Instance->FindNick(prefix);
2259                 userrec* who = this->Instance->FindNick(nick);
2260
2261                 if (who)
2262                 {
2263                         /* Prepend kill source, if we don't have one */
2264                         std::string sourceserv = prefix;
2265                         if (u)
2266                         {
2267                                 sourceserv = u->server;
2268                         }
2269                         if (*(params[1].c_str()) != '[')
2270                         {
2271                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2272                         }
2273                         std::string reason = params[1];
2274                         params[1] = ":" + params[1];
2275                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2276                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2277                         userrec::QuitUser(this->Instance,who,reason);
2278                 }
2279                 return true;
2280         }
2281
2282         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2283         {
2284                 if (params.size() < 1)
2285                         return true;
2286
2287                 if (params.size() == 1)
2288                 {
2289                         TreeServer* ServerSource = FindServer(prefix);
2290                         if (ServerSource)
2291                         {
2292                                 ServerSource->SetPingFlag();
2293                         }
2294                 }
2295                 else
2296                 {
2297                         std::string forwardto = params[1];
2298                         if (forwardto == this->Instance->Config->ServerName)
2299                         {
2300                                 /*
2301                                  * this is a PONG for us
2302                                  * if the prefix is a user, check theyre local, and if they are,
2303                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2304                                  * Services might want to send these s->s, but we dont need to yet.
2305                                  */
2306                                 userrec* u = this->Instance->FindNick(prefix);
2307
2308                                 if (u)
2309                                 {
2310                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2311                                 }
2312                         }
2313                         else
2314                         {
2315                                 // not for us, pass it on :)
2316                                 DoOneToOne(prefix,"PONG",params,forwardto);
2317                         }
2318                 }
2319
2320                 return true;
2321         }
2322
2323         bool MetaData(std::string prefix, std::deque<std::string> &params)
2324         {
2325                 if (params.size() < 3)
2326                         return true;
2327
2328                 TreeServer* ServerSource = FindServer(prefix);
2329
2330                 if (ServerSource)
2331                 {
2332                         if (params[0] == "*")
2333                         {
2334                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2335                         }
2336                         else if (*(params[0].c_str()) == '#')
2337                         {
2338                                 chanrec* c = this->Instance->FindChan(params[0]);
2339                                 if (c)
2340                                 {
2341                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2342                                 }
2343                         }
2344                         else if (*(params[0].c_str()) != '#')
2345                         {
2346                                 userrec* u = this->Instance->FindNick(params[0]);
2347                                 if (u)
2348                                 {
2349                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2350                                 }
2351                         }
2352                 }
2353
2354                 params[2] = ":" + params[2];
2355                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2356                 return true;
2357         }
2358
2359         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2360         {
2361                 if (params.size() < 1)
2362                         return true;
2363
2364                 TreeServer* ServerSource = FindServer(prefix);
2365
2366                 if (ServerSource)
2367                 {
2368                         ServerSource->SetVersion(params[0]);
2369                 }
2370                 params[0] = ":" + params[0];
2371                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2372                 return true;
2373         }
2374
2375         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2376         {
2377                 if (params.size() < 1)
2378                         return true;
2379
2380                 userrec* u = this->Instance->FindNick(prefix);
2381
2382                 if (u)
2383                 {
2384                         u->ChangeDisplayedHost(params[0].c_str());
2385                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2386                 }
2387                 return true;
2388         }
2389
2390         bool AddLine(std::string prefix, std::deque<std::string> &params)
2391         {
2392                 if (params.size() < 6)
2393                         return true;
2394
2395                 bool propogate = false;
2396
2397                 switch (*(params[0].c_str()))
2398                 {
2399                         case 'Z':
2400                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2401                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2402                         break;
2403                         case 'Q':
2404                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2405                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2406                         break;
2407                         case 'E':
2408                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2409                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2410                         break;
2411                         case 'G':
2412                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2413                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2414                         break;
2415                         case 'K':
2416                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2417                         break;
2418                         default:
2419                                 /* Just in case... */
2420                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2421                                 propogate = false;
2422                         break;
2423                 }
2424
2425                 /* Send it on its way */
2426                 if (propogate)
2427                 {
2428                         if (atoi(params[4].c_str()))
2429                         {
2430                                 this->Instance->SNO->WriteToSnoMask('x',"%s Added %cLINE on %s to expire in %lu seconds (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),atoi(params[4].c_str()),params[5].c_str());
2431                         }
2432                         else
2433                         {
2434                                 this->Instance->SNO->WriteToSnoMask('x',"%s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
2435                         }
2436                         params[5] = ":" + params[5];
2437                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2438                 }
2439                 if (!this->bursting)
2440                 {
2441                         Instance->Log(DEBUG,"Applying lines...");
2442                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2443                 }
2444                 return true;
2445         }
2446
2447         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2448         {
2449                 if (params.size() < 1)
2450                         return true;
2451
2452                 userrec* u = this->Instance->FindNick(prefix);
2453
2454                 if (u)
2455                 {
2456                         u->ChangeName(params[0].c_str());
2457                         params[0] = ":" + params[0];
2458                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2459                 }
2460                 return true;
2461         }
2462
2463         bool Whois(std::string prefix, std::deque<std::string> &params)
2464         {
2465                 if (params.size() < 1)
2466                         return true;
2467
2468                 Instance->Log(DEBUG,"In IDLE command");
2469                 userrec* u = this->Instance->FindNick(prefix);
2470
2471                 if (u)
2472                 {
2473                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2474                         // an incoming request
2475                         if (params.size() == 1)
2476                         {
2477                                 userrec* x = this->Instance->FindNick(params[0]);
2478                                 if ((x) && (IS_LOCAL(x)))
2479                                 {
2480                                         userrec* x = this->Instance->FindNick(params[0]);
2481                                         char signon[MAXBUF];
2482                                         char idle[MAXBUF];
2483
2484                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2485                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2486                                         std::deque<std::string> par;
2487                                         par.push_back(prefix);
2488                                         par.push_back(signon);
2489                                         par.push_back(idle);
2490                                         // ours, we're done, pass it BACK
2491                                         DoOneToOne(params[0],"IDLE",par,u->server);
2492                                 }
2493                                 else
2494                                 {
2495                                         // not ours pass it on
2496                                         DoOneToOne(prefix,"IDLE",params,x->server);
2497                                 }
2498                         }
2499                         else if (params.size() == 3)
2500                         {
2501                                 std::string who_did_the_whois = params[0];
2502                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2503                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2504                                 {
2505                                         // an incoming reply to a whois we sent out
2506                                         std::string nick_whoised = prefix;
2507                                         unsigned long signon = atoi(params[1].c_str());
2508                                         unsigned long idle = atoi(params[2].c_str());
2509                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2510                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2511                                 }
2512                                 else
2513                                 {
2514                                         // not ours, pass it on
2515                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2516                                 }
2517                         }
2518                 }
2519                 return true;
2520         }
2521
2522         bool Push(std::string prefix, std::deque<std::string> &params)
2523         {
2524                 if (params.size() < 2)
2525                         return true;
2526
2527                 userrec* u = this->Instance->FindNick(params[0]);
2528
2529                 if (!u)
2530                         return true;
2531
2532                 if (IS_LOCAL(u))
2533                 {
2534                         u->Write(params[1]);
2535                 }
2536                 else
2537                 {
2538                         // continue the raw onwards
2539                         params[1] = ":" + params[1];
2540                         DoOneToOne(prefix,"PUSH",params,u->server);
2541                 }
2542                 return true;
2543         }
2544
2545         bool Time(std::string prefix, std::deque<std::string> &params)
2546         {
2547                 // :source.server TIME remote.server sendernick
2548                 // :remote.server TIME source.server sendernick TS
2549                 if (params.size() == 2)
2550                 {
2551                         // someone querying our time?
2552                         if (this->Instance->Config->ServerName == params[0])
2553                         {
2554                                 userrec* u = this->Instance->FindNick(params[1]);
2555                                 if (u)
2556                                 {
2557                                         char curtime[256];
2558                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2559                                         params.push_back(curtime);
2560                                         params[0] = prefix;
2561                                         DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2562                                 }
2563                         }
2564                         else
2565                         {
2566                                 // not us, pass it on
2567                                 userrec* u = this->Instance->FindNick(params[1]);
2568                                 if (u)
2569                                         DoOneToOne(prefix,"TIME",params,params[0]);
2570                         }
2571                 }
2572                 else if (params.size() == 3)
2573                 {
2574                         // a response to a previous TIME
2575                         userrec* u = this->Instance->FindNick(params[1]);
2576                         if ((u) && (IS_LOCAL(u)))
2577                         {
2578                         time_t rawtime = atol(params[2].c_str());
2579                         struct tm * timeinfo;
2580                         timeinfo = localtime(&rawtime);
2581                                 char tms[26];
2582                                 snprintf(tms,26,"%s",asctime(timeinfo));
2583                                 tms[24] = 0;
2584                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2585                         }
2586                         else
2587                         {
2588                                 if (u)
2589                                         DoOneToOne(prefix,"TIME",params,u->server);
2590                         }
2591                 }
2592                 return true;
2593         }
2594
2595         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2596         {
2597                 if (params.size() < 1)
2598                         return true;
2599
2600                 if (params.size() == 1)
2601                 {
2602                         std::string stufftobounce = params[0];
2603                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2604                         return true;
2605                 }
2606                 else
2607                 {
2608                         std::string forwardto = params[1];
2609                         if (forwardto == this->Instance->Config->ServerName)
2610                         {
2611                                 // this is a ping for us, send back PONG to the requesting server
2612                                 params[1] = params[0];
2613                                 params[0] = forwardto;
2614                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2615                         }
2616                         else
2617                         {
2618                                 // not for us, pass it on :)
2619                                 DoOneToOne(prefix,"PING",params,forwardto);
2620                         }
2621                         return true;
2622                 }
2623         }
2624
2625         bool RemoveStatus(std::string prefix, std::deque<std::string> &params)
2626         {
2627                 if (params.size() < 1)
2628                         return true;
2629
2630                 chanrec* c = Instance->FindChan(params[0]);
2631
2632                 if (c)
2633                 {
2634                         irc::modestacker modestack(false);
2635                         CUList *ulist = c->GetUsers();
2636                         const char* y[127];
2637                         std::deque<std::string> stackresult;
2638                         std::string x;
2639
2640                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2641                         {
2642                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2643                                 if (modesequence.length())
2644                                 {
2645                                         ServerInstance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2646                                         irc::spacesepstream sep(modesequence);
2647                                         std::string modeletters = sep.GetToken();
2648                                         ServerInstance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2649
2650                                         while (!modeletters.empty())
2651                                         {
2652                                                 char mletter = *(modeletters.begin());
2653                                                 modestack.Push(mletter,sep.GetToken());
2654                                                 ServerInstance->Log(DEBUG,"Push letter = '%c'",mletter);
2655                                                 modeletters.erase(modeletters.begin());
2656                                                 ServerInstance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2657                                         }
2658                                 }
2659                         }
2660
2661                         while (modestack.GetStackedLine(stackresult))
2662                         {
2663                                 ServerInstance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2664                                 stackresult.push_front(ConvToStr(c->age));
2665                                 stackresult.push_front(c->name);
2666                                 DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2667                                 stackresult.erase(stackresult.begin() + 1);
2668                                 ServerInstance->Log(DEBUG,"Stacked items:");
2669                                 for (size_t z = 0; z < stackresult.size(); z++)
2670                                 {
2671                                         y[z] = stackresult[z].c_str();
2672                                         ServerInstance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2673                                 }
2674                                 userrec* n = new userrec(Instance);
2675                                 n->SetFd(FD_MAGIC_NUMBER);
2676                                 Instance->SendMode(y, stackresult.size(), n);
2677                                 delete n;
2678                         }
2679                 }
2680                 return true;
2681         }
2682
2683         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2684         {
2685                 if (params.size() < 4)
2686                         return false;
2687
2688                 std::string servername = params[0];
2689                 std::string password = params[1];
2690                 // hopcount is not used for a remote server, we calculate this ourselves
2691                 std::string description = params[3];
2692                 TreeServer* ParentOfThis = FindServer(prefix);
2693
2694                 if (!ParentOfThis)
2695                 {
2696                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2697                         return false;
2698                 }
2699                 TreeServer* CheckDupe = FindServer(servername);
2700                 if (CheckDupe)
2701                 {
2702                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2703                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2704                         return false;
2705                 }
2706                 TreeServer* Node = new TreeServer(this->Instance,servername,description,ParentOfThis,NULL);
2707                 ParentOfThis->AddChild(Node);
2708                 params[3] = ":" + params[3];
2709                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2710                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2711                 return true;
2712         }
2713
2714         bool Outbound_Reply_Server(std::deque<std::string> &params)
2715         {
2716                 if (params.size() < 4)
2717                         return false;
2718
2719                 irc::string servername = params[0].c_str();
2720                 std::string sname = params[0];
2721                 std::string password = params[1];
2722                 int hops = atoi(params[2].c_str());
2723
2724                 if (hops)
2725                 {
2726                         this->WriteLine("ERROR :Server too far away for authentication");
2727                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2728                         return false;
2729                 }
2730                 std::string description = params[3];
2731                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2732                 {
2733                         if ((x->Name == servername) && (x->RecvPass == password))
2734                         {
2735                                 TreeServer* CheckDupe = FindServer(sname);
2736                                 if (CheckDupe)
2737                                 {
2738                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2739                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2740                                         return false;
2741                                 }
2742                                 // Begin the sync here. this kickstarts the
2743                                 // other side, waiting in WAIT_AUTH_2 state,
2744                                 // into starting their burst, as it shows
2745                                 // that we're happy.
2746                                 this->LinkState = CONNECTED;
2747                                 // we should add the details of this server now
2748                                 // to the servers tree, as a child of the root
2749                                 // node.
2750                                 TreeServer* Node = new TreeServer(this->Instance,sname,description,TreeRoot,this);
2751                                 TreeRoot->AddChild(Node);
2752                                 params[3] = ":" + params[3];
2753                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2754                                 this->bursting = true;
2755                                 this->DoBurst(Node);
2756                                 return true;
2757                         }
2758                 }
2759                 this->WriteLine("ERROR :Invalid credentials");
2760                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2761                 return false;
2762         }
2763
2764         bool Inbound_Server(std::deque<std::string> &params)
2765         {
2766                 if (params.size() < 4)
2767                         return false;
2768
2769                 irc::string servername = params[0].c_str();
2770                 std::string sname = params[0];
2771                 std::string password = params[1];
2772                 int hops = atoi(params[2].c_str());
2773
2774                 if (hops)
2775                 {
2776                         this->WriteLine("ERROR :Server too far away for authentication");
2777                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2778                         return false;
2779                 }
2780                 std::string description = params[3];
2781                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2782                 {
2783                         if ((x->Name == servername) && (x->RecvPass == password))
2784                         {
2785                                 TreeServer* CheckDupe = FindServer(sname);
2786                                 if (CheckDupe)
2787                                 {
2788                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2789                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2790                                         return false;
2791                                 }
2792                                 /* If the config says this link is encrypted, but the remote side
2793                                  * hasnt bothered to send the AES command before SERVER, then we
2794                                  * boot them off as we MUST have this connection encrypted.
2795                                  */
2796                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2797                                 {
2798                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2799                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2800                                         return false;
2801                                 }
2802                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2803                                 this->InboundServerName = sname;
2804                                 this->InboundDescription = description;
2805                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2806                                 // along with the sendpass from this block.
2807                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2808                                 // move to the next state, we are now waiting for THEM.
2809                                 this->LinkState = WAIT_AUTH_2;
2810                                 return true;
2811                         }
2812                 }
2813                 this->WriteLine("ERROR :Invalid credentials");
2814                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2815                 return false;
2816         }
2817
2818         void Split(std::string line, std::deque<std::string> &n)
2819         {
2820                 n.clear();
2821                 irc::tokenstream tokens(line);
2822                 std::string param;
2823                 while ((param = tokens.GetToken()) != "")
2824                         n.push_back(param);
2825                 return;
2826         }
2827
2828         bool ProcessLine(std::string line)
2829         {
2830                 std::deque<std::string> params;
2831                 irc::string command;
2832                 std::string prefix;
2833
2834                 if (line.empty())
2835                         return true;
2836
2837                 line = line.substr(0, line.find_first_of("\r\n"));
2838
2839                 Instance->Log(DEBUG,"IN: %s", line.c_str());
2840
2841                 this->Split(line.c_str(),params);
2842
2843                 if ((params[0][0] == ':') && (params.size() > 1))
2844                 {
2845                         prefix = params[0].substr(1);
2846                         params.pop_front();
2847                 }
2848
2849                 command = params[0].c_str();
2850                 params.pop_front();
2851
2852                 if ((!this->ctx_in) && (command == "AES"))
2853                 {
2854                         std::string sserv = params[0];
2855                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2856                         {
2857                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2858                                 {
2859                                         this->InitAES(x->EncryptionKey,sserv);
2860                                 }
2861                         }
2862
2863                         return true;
2864                 }
2865                 else if ((this->ctx_in) && (command == "AES"))
2866                 {
2867                         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());
2868                 }
2869
2870                 switch (this->LinkState)
2871                 {
2872                         TreeServer* Node;
2873
2874                         case WAIT_AUTH_1:
2875                                 // Waiting for SERVER command from remote server. Server initiating
2876                                 // the connection sends the first SERVER command, listening server
2877                                 // replies with theirs if its happy, then if the initiator is happy,
2878                                 // it starts to send its net sync, which starts the merge, otherwise
2879                                 // it sends an ERROR.
2880                                 if (command == "PASS")
2881                                 {
2882                                         /* Silently ignored */
2883                                 }
2884                                 else if (command == "SERVER")
2885                                 {
2886                                         return this->Inbound_Server(params);
2887                                 }
2888                                 else if (command == "ERROR")
2889                                 {
2890                                         return this->Error(params);
2891                                 }
2892                                 else if (command == "USER")
2893                                 {
2894                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2895                                         return false;
2896                                 }
2897                                 else if (command == "CAPAB")
2898                                 {
2899                                         return this->Capab(params);
2900                                 }
2901                                 else if ((command == "U") || (command == "S"))
2902                                 {
2903                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2904                                         return false;
2905                                 }
2906                                 else
2907                                 {
2908                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2909                                         return false;
2910                                 }
2911                         break;
2912                         case WAIT_AUTH_2:
2913                                 // Waiting for start of other side's netmerge to say they liked our
2914                                 // password.
2915                                 if (command == "SERVER")
2916                                 {
2917                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2918                                         // silently ignore.
2919                                         return true;
2920                                 }
2921                                 else if ((command == "U") || (command == "S"))
2922                                 {
2923                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2924                                         return false;
2925                                 }
2926                                 else if (command == "BURST")
2927                                 {
2928                                         if (params.size())
2929                                         {
2930                                                 /* If a time stamp is provided, try and check syncronization */
2931                                                 time_t THEM = atoi(params[0].c_str());
2932                                                 long delta = THEM-time(NULL);
2933                                                 if ((delta < -600) || (delta > 600))
2934                                                 {
2935                                                         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));
2936                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2937                                                         return false;
2938                                                 }
2939                                                 else if ((delta < -60) || (delta > 60))
2940                                                 {
2941                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2942                                                 }
2943                                         }
2944                                         this->LinkState = CONNECTED;
2945                                         Node = new TreeServer(this->Instance,InboundServerName,InboundDescription,TreeRoot,this);
2946                                         TreeRoot->AddChild(Node);
2947                                         params.clear();
2948                                         params.push_back(InboundServerName);
2949                                         params.push_back("*");
2950                                         params.push_back("1");
2951                                         params.push_back(":"+InboundDescription);
2952                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2953                                         this->bursting = true;
2954                                         this->DoBurst(Node);
2955                                 }
2956                                 else if (command == "ERROR")
2957                                 {
2958                                         return this->Error(params);
2959                                 }
2960                                 else if (command == "CAPAB")
2961                                 {
2962                                         return this->Capab(params);
2963                                 }
2964
2965                         break;
2966                         case LISTENER:
2967                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2968                                 return false;
2969                         break;
2970                         case CONNECTING:
2971                                 if (command == "SERVER")
2972                                 {
2973                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2974                                         // has just sent us their credentials. If we get this far, theyre
2975                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2976                                         // if we're happy with this, we should send our netburst which
2977                                         // kickstarts the merge.
2978                                         return this->Outbound_Reply_Server(params);
2979                                 }
2980                                 else if (command == "ERROR")
2981                                 {
2982                                         return this->Error(params);
2983                                 }
2984                         break;
2985                         case CONNECTED:
2986                                 // This is the 'authenticated' state, when all passwords
2987                                 // have been exchanged and anything past this point is taken
2988                                 // as gospel.
2989
2990                                 if (prefix != "")
2991                                 {
2992                                         std::string direction = prefix;
2993                                         userrec* t = this->Instance->FindNick(prefix);
2994                                         if (t)
2995                                         {
2996                                                 direction = t->server;
2997                                         }
2998                                         TreeServer* route_back_again = BestRouteTo(direction);
2999                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3000                                         {
3001                                                 if (route_back_again)
3002                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3003                                                 return true;
3004                                         }
3005
3006                                         /* Fix by brain:
3007                                          * When there is activity on the socket, reset the ping counter so
3008                                          * that we're not wasting bandwidth pinging an active server.
3009                                          */
3010                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3011                                         route_back_again->SetPingFlag();
3012                                 }
3013
3014                                 if (command == "SVSMODE")
3015                                 {
3016                                         /* Services expects us to implement
3017                                          * SVSMODE. In inspircd its the same as
3018                                          * MODE anyway.
3019                                          */
3020                                         command = "MODE";
3021                                 }
3022                                 std::string target = "";
3023                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3024                                  * working with std::string here.
3025                                  */
3026                                 if ((command == "NICK") && (params.size() > 1))
3027                                 {
3028                                         return this->IntroduceClient(prefix,params);
3029                                 }
3030                                 else if (command == "FJOIN")
3031                                 {
3032                                         return this->ForceJoin(prefix,params);
3033                                 }
3034                                 else if (command == "STATS")
3035                                 {
3036                                         return this->Stats(prefix, params);
3037                                 }
3038                                 else if (command == "MOTD")
3039                                 {
3040                                         return this->Motd(prefix, params);
3041                                 }
3042                                 else if (command == "ADMIN")
3043                                 {
3044                                         return this->Admin(prefix, params);
3045                                 }
3046                                 else if (command == "SERVER")
3047                                 {
3048                                         return this->RemoteServer(prefix,params);
3049                                 }
3050                                 else if (command == "ERROR")
3051                                 {
3052                                         return this->Error(params);
3053                                 }
3054                                 else if (command == "OPERTYPE")
3055                                 {
3056                                         return this->OperType(prefix,params);
3057                                 }
3058                                 else if (command == "FMODE")
3059                                 {
3060                                         return this->ForceMode(prefix,params);
3061                                 }
3062                                 else if (command == "KILL")
3063                                 {
3064                                         return this->RemoteKill(prefix,params);
3065                                 }
3066                                 else if (command == "FTOPIC")
3067                                 {
3068                                         return this->ForceTopic(prefix,params);
3069                                 }
3070                                 else if (command == "REHASH")
3071                                 {
3072                                         return this->RemoteRehash(prefix,params);
3073                                 }
3074                                 else if (command == "METADATA")
3075                                 {
3076                                         return this->MetaData(prefix,params);
3077                                 }
3078                                 else if (command == "REMSTATUS")
3079                                 {
3080                                         return this->RemoveStatus(prefix,params);
3081                                 }
3082                                 else if (command == "PING")
3083                                 {
3084                                         /*
3085                                          * We just got a ping from a server that's bursting.
3086                                          * This can't be right, so set them to not bursting, and
3087                                          * apply their lines.
3088                                          */
3089                                         if (this->bursting)
3090                                         {
3091                                                 this->bursting = false;
3092                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3093                                         }
3094                                         if (prefix == "")
3095                                         {
3096                                                 prefix = this->GetName();
3097                                         }
3098                                         return this->LocalPing(prefix,params);
3099                                 }
3100                                 else if (command == "PONG")
3101                                 {
3102                                         /*
3103                                          * We just got a pong from a server that's bursting.
3104                                          * This can't be right, so set them to not bursting, and
3105                                          * apply their lines.
3106                                          */
3107                                         if (this->bursting)
3108                                         {
3109                                                 this->bursting = false;
3110                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3111                                         }
3112                                         if (prefix == "")
3113                                         {
3114                                                 prefix = this->GetName();
3115                                         }
3116                                         return this->LocalPong(prefix,params);
3117                                 }
3118                                 else if (command == "VERSION")
3119                                 {
3120                                         return this->ServerVersion(prefix,params);
3121                                 }
3122                                 else if (command == "FHOST")
3123                                 {
3124                                         return this->ChangeHost(prefix,params);
3125                                 }
3126                                 else if (command == "FNAME")
3127                                 {
3128                                         return this->ChangeName(prefix,params);
3129                                 }
3130                                 else if (command == "ADDLINE")
3131                                 {
3132                                         return this->AddLine(prefix,params);
3133                                 }
3134                                 else if (command == "SVSNICK")
3135                                 {
3136                                         if (prefix == "")
3137                                         {
3138                                                 prefix = this->GetName();
3139                                         }
3140                                         return this->ForceNick(prefix,params);
3141                                 }
3142                                 else if (command == "IDLE")
3143                                 {
3144                                         return this->Whois(prefix,params);
3145                                 }
3146                                 else if (command == "PUSH")
3147                                 {
3148                                         return this->Push(prefix,params);
3149                                 }
3150                                 else if (command == "TIME")
3151                                 {
3152                                         return this->Time(prefix,params);
3153                                 }
3154                                 else if ((command == "KICK") && (IsServer(prefix)))
3155                                 {
3156                                         std::string sourceserv = this->myhost;
3157                                         if (params.size() == 3)
3158                                         {
3159                                                 userrec* user = this->Instance->FindNick(params[1]);
3160                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3161                                                 if (user && chan)
3162                                                 {
3163                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3164                                                                 /* Yikes, the channels gone! */
3165                                                                 delete chan;
3166                                                 }
3167                                         }
3168                                         if (this->InboundServerName != "")
3169                                         {
3170                                                 sourceserv = this->InboundServerName;
3171                                         }
3172                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3173                                 }
3174                                 else if (command == "SVSJOIN")
3175                                 {
3176                                         if (prefix == "")
3177                                         {
3178                                                 prefix = this->GetName();
3179                                         }
3180                                         return this->ServiceJoin(prefix,params);
3181                                 }
3182                                 else if (command == "SQUIT")
3183                                 {
3184                                         if (params.size() == 2)
3185                                         {
3186                                                 this->Squit(FindServer(params[0]),params[1]);
3187                                         }
3188                                         return true;
3189                                 }
3190                                 else if (command == "ENDBURST")
3191                                 {
3192                                         this->bursting = false;
3193                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3194                                         std::string sourceserv = this->myhost;
3195                                         if (this->InboundServerName != "")
3196                                         {
3197                                                 sourceserv = this->InboundServerName;
3198                                         }
3199                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3200                                         return true;
3201                                 }
3202                                 else
3203                                 {
3204                                         // not a special inter-server command.
3205                                         // Emulate the actual user doing the command,
3206                                         // this saves us having a huge ugly parser.
3207                                         userrec* who = this->Instance->FindNick(prefix);
3208                                         std::string sourceserv = this->myhost;
3209                                         if (this->InboundServerName != "")
3210                                         {
3211                                                 sourceserv = this->InboundServerName;
3212                                         }
3213                                         if (who)
3214                                         {
3215                                                 if ((command == "NICK") && (params.size() > 0))
3216                                                 {
3217                                                         /* On nick messages, check that the nick doesnt
3218                                                          * already exist here. If it does, kill their copy,
3219                                                          * and our copy.
3220                                                          */
3221                                                         userrec* x = this->Instance->FindNick(params[0]);
3222                                                         if ((x) && (x != who))
3223                                                         {
3224                                                                 std::deque<std::string> p;
3225                                                                 p.push_back(params[0]);
3226                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3227                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3228                                                                 p.clear();
3229                                                                 p.push_back(prefix);
3230                                                                 p.push_back("Nickname collision");
3231                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3232                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3233                                                                 userrec* y = this->Instance->FindNick(prefix);
3234                                                                 if (y)
3235                                                                 {
3236                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3237                                                                 }
3238                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3239                                                         }
3240                                                 }
3241                                                 // its a user
3242                                                 target = who->server;
3243                                                 const char* strparams[127];
3244                                                 for (unsigned int q = 0; q < params.size(); q++)
3245                                                 {
3246                                                         strparams[q] = params[q].c_str();
3247                                                 }
3248                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3249                                                 {
3250                                                         case CMD_INVALID:
3251                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3252                                                                 return false;
3253                                                         break;
3254                                                         case CMD_FAILURE:
3255                                                                 return true;
3256                                                         break;
3257                                                         default:
3258                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3259                                                         break;
3260                                                 }
3261                                         }
3262                                         else
3263                                         {
3264                                                 // its not a user. Its either a server, or somethings screwed up.
3265                                                 if (IsServer(prefix))
3266                                                 {
3267                                                         target = this->Instance->Config->ServerName;
3268                                                 }
3269                                                 else
3270                                                 {
3271                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3272                                                         return true;
3273                                                 }
3274                                         }
3275                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3276
3277                                 }
3278                                 return true;
3279                         break;
3280                 }
3281                 return true;
3282         }
3283
3284         virtual std::string GetName()
3285         {
3286                 std::string sourceserv = this->myhost;
3287                 if (this->InboundServerName != "")
3288                 {
3289                         sourceserv = this->InboundServerName;
3290                 }
3291                 return sourceserv;
3292         }
3293
3294         virtual void OnTimeout()
3295         {
3296                 if (this->LinkState == CONNECTING)
3297                 {
3298                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3299                         Link* MyLink = FindLink(myhost);
3300                         if (MyLink)
3301                                 DoFailOver(MyLink);
3302                 }
3303         }
3304
3305         virtual void OnClose()
3306         {
3307                 // Connection closed.
3308                 // If the connection is fully up (state CONNECTED)
3309                 // then propogate a netsplit to all peers.
3310                 std::string quitserver = this->myhost;
3311                 if (this->InboundServerName != "")
3312                 {
3313                         quitserver = this->InboundServerName;
3314                 }
3315                 TreeServer* s = FindServer(quitserver);
3316                 if (s)
3317                 {
3318                         Squit(s,"Remote host closed the connection");
3319                 }
3320                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3321         }
3322
3323         virtual int OnIncomingConnection(int newsock, char* ip)
3324         {
3325                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3326                  * or discovering if this port is the server port, we don't allow connections from any
3327                  * IPs for which we don't have a link block.
3328                  */
3329                 bool found = false;
3330
3331                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3332                 if (!found)
3333                 {
3334                         for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
3335                                 if (MatchCIDR(ip, (*i).c_str()))
3336                                         found = true;
3337
3338                         if (!found)
3339                         {
3340                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3341                                 close(newsock);
3342                                 return false;
3343                         }
3344                 }
3345                 TreeSocket* s = new TreeSocket(this->Instance, newsock, ip);
3346                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3347                 return true;
3348         }
3349 };
3350
3351 /** This class is used to resolve server hostnames during /connect and autoconnect.
3352  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3353  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3354  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3355  * will have an IP address which we can then use to continue our connection.
3356  */
3357 class ServernameResolver : public Resolver
3358 {
3359  private:
3360         /** A copy of the Link tag info for what we're connecting to.
3361          * We take a copy, rather than using a pointer, just in case the
3362          * admin takes the tag away and rehashes while the domain is resolving.
3363          */
3364         Link MyLink;
3365  public:
3366         ServernameResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3367         {
3368                 /* Nothing in here, folks */
3369         }
3370
3371         void OnLookupComplete(const std::string &result)
3372         {
3373                 /* Initiate the connection, now that we have an IP to use.
3374                  * Passing a hostname directly to InspSocket causes it to
3375                  * just bail and set its FD to -1.
3376                  */
3377                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3378                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3379                 {
3380                         TreeSocket* newsocket = new TreeSocket(ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3381                         if (newsocket->GetFd() > -1)
3382                         {
3383                                 /* We're all OK */
3384                         }
3385                         else
3386                         {
3387                                 /* Something barfed, show the opers */
3388                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3389                                 delete newsocket;
3390                                 DoFailOver(&MyLink);
3391                         }
3392                 }
3393         }
3394
3395         void OnError(ResolverError e, const std::string &errormessage)
3396         {
3397                 /* Ooops! */
3398                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3399                 DoFailOver(&MyLink);
3400         }
3401 };
3402
3403 class SecurityIPResolver : public Resolver
3404 {
3405  private:
3406         Link MyLink;
3407  public:
3408         SecurityIPResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3409         {
3410         }
3411
3412         void OnLookupComplete(const std::string &result)
3413         {
3414                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3415                 ValidIPs.push_back(result);
3416         }
3417
3418         void OnError(ResolverError e, const std::string &errormessage)
3419         {
3420                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3421         }
3422 };
3423
3424 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3425 {
3426         for (unsigned int c = 0; c < list.size(); c++)
3427         {
3428                 if (list[c] == server)
3429                 {
3430                         return;
3431                 }
3432         }
3433         list.push_back(server);
3434 }
3435
3436 /** returns a list of DIRECT servernames for a specific channel */
3437 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3438 {
3439         CUList *ulist = c->GetUsers();
3440         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3441         {
3442                 if (i->second->GetFd() < 0)
3443                 {
3444                         TreeServer* best = BestRouteTo(i->second->server);
3445                         if (best)
3446                                 AddThisServer(best,list);
3447                 }
3448         }
3449         return;
3450 }
3451
3452 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3453 {
3454         TreeServer* omitroute = BestRouteTo(omit);
3455         if ((command == "NOTICE") || (command == "PRIVMSG"))
3456         {
3457                 if (params.size() >= 2)
3458                 {
3459                         /* Prefixes */
3460                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3461                         {
3462                                 params[0] = params[0].substr(1, params[0].length()-1);
3463                         }
3464                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3465                         {
3466                                 // special routing for private messages/notices
3467                                 userrec* d = ServerInstance->FindNick(params[0]);
3468                                 if (d)
3469                                 {
3470                                         std::deque<std::string> par;
3471                                         par.push_back(params[0]);
3472                                         par.push_back(":"+params[1]);
3473                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3474                                         return true;
3475                                 }
3476                         }
3477                         else if (*(params[0].c_str()) == '$')
3478                         {
3479                                 std::deque<std::string> par;
3480                                 par.push_back(params[0]);
3481                                 par.push_back(":"+params[1]);
3482                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3483                                 return true;
3484                         }
3485                         else
3486                         {
3487                                 ServerInstance->Log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3488                                 chanrec* c = ServerInstance->FindChan(params[0]);
3489                                 if (c)
3490                                 {
3491                                         std::deque<TreeServer*> list;
3492                                         GetListOfServersForChannel(c,list);
3493                                         ServerInstance->Log(DEBUG,"Got a list of %d servers",list.size());
3494                                         unsigned int lsize = list.size();
3495                                         for (unsigned int i = 0; i < lsize; i++)
3496                                         {
3497                                                 TreeSocket* Sock = list[i]->GetSocket();
3498                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3499                                                 {
3500                                                         ServerInstance->Log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3501                                                         Sock->WriteLine(data);
3502                                                 }
3503                                         }
3504                                         return true;
3505                                 }
3506                         }
3507                 }
3508         }
3509         unsigned int items = TreeRoot->ChildCount();
3510         for (unsigned int x = 0; x < items; x++)
3511         {
3512                 TreeServer* Route = TreeRoot->GetChild(x);
3513                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3514                 {
3515                         TreeSocket* Sock = Route->GetSocket();
3516                         if (Sock)
3517                                 Sock->WriteLine(data);
3518                 }
3519         }
3520         return true;
3521 }
3522
3523 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3524 {
3525         TreeServer* omitroute = BestRouteTo(omit);
3526         std::string FullLine = ":" + prefix + " " + command;
3527         unsigned int words = params.size();
3528         for (unsigned int x = 0; x < words; x++)
3529         {
3530                 FullLine = FullLine + " " + params[x];
3531         }
3532         unsigned int items = TreeRoot->ChildCount();
3533         for (unsigned int x = 0; x < items; x++)
3534         {
3535                 TreeServer* Route = TreeRoot->GetChild(x);
3536                 // Send the line IF:
3537                 // The route has a socket (its a direct connection)
3538                 // The route isnt the one to be omitted
3539                 // The route isnt the path to the one to be omitted
3540                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3541                 {
3542                         TreeSocket* Sock = Route->GetSocket();
3543                         if (Sock)
3544                                 Sock->WriteLine(FullLine);
3545                 }
3546         }
3547         return true;
3548 }
3549
3550 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3551 {
3552         std::string FullLine = ":" + prefix + " " + command;
3553         unsigned int words = params.size();
3554         for (unsigned int x = 0; x < words; x++)
3555         {
3556                 FullLine = FullLine + " " + params[x];
3557         }
3558         unsigned int items = TreeRoot->ChildCount();
3559         for (unsigned int x = 0; x < items; x++)
3560         {
3561                 TreeServer* Route = TreeRoot->GetChild(x);
3562                 if (Route && Route->GetSocket())
3563                 {
3564                         TreeSocket* Sock = Route->GetSocket();
3565                         if (Sock)
3566                                 Sock->WriteLine(FullLine);
3567                 }
3568         }
3569         return true;
3570 }
3571
3572 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3573 {
3574         std::string spfx = prefix;
3575         std::string scmd = command;
3576         return DoOneToMany(spfx, scmd, params);
3577 }
3578
3579 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3580 {
3581         std::string spfx = prefix;
3582         std::string scmd = command;
3583         return DoOneToAllButSender(spfx, scmd, params, omit);
3584 }
3585
3586 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3587 {
3588         TreeServer* Route = BestRouteTo(target);
3589         if (Route)
3590         {
3591                 std::string FullLine = ":" + prefix + " " + command;
3592                 unsigned int words = params.size();
3593                 for (unsigned int x = 0; x < words; x++)
3594                 {
3595                         FullLine = FullLine + " " + params[x];
3596                 }
3597                 if (Route && Route->GetSocket())
3598                 {
3599                         TreeSocket* Sock = Route->GetSocket();
3600                         if (Sock)
3601                                 Sock->WriteLine(FullLine);
3602                 }
3603                 return true;
3604         }
3605         else
3606         {
3607                 return false;
3608         }
3609 }
3610
3611 std::vector<TreeSocket*> Bindings;
3612
3613 void ReadConfiguration(bool rebind)
3614 {
3615         Conf = new ConfigReader(ServerInstance);
3616         if (rebind)
3617         {
3618                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3619                 {
3620                         std::string Type = Conf->ReadValue("bind","type",j);
3621                         std::string IP = Conf->ReadValue("bind","address",j);
3622                         long Port = Conf->ReadInteger("bind","port",j,true);
3623                         if (Type == "servers")
3624                         {
3625                                 if (IP == "*")
3626                                 {
3627                                         IP = "";
3628                                 }
3629                                 TreeSocket* listener = new TreeSocket(ServerInstance, IP.c_str(),Port,true,10);
3630                                 if (listener->GetState() == I_LISTENING)
3631                                 {
3632                                         Bindings.push_back(listener);
3633                                 }
3634                                 else
3635                                 {
3636                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3637                                         listener->Close();
3638                                         DELETE(listener);
3639                                 }
3640                         }
3641                 }
3642         }
3643         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3644         HideULines = Conf->ReadFlag("options","hideulines",0);
3645         LinkBlocks.clear();
3646         ValidIPs.clear();
3647         for (int j =0; j < Conf->Enumerate("link"); j++)
3648         {
3649                 Link L;
3650                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3651                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3652                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3653                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3654                 L.Port = Conf->ReadInteger("link","port",j,true);
3655                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3656                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3657                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3658                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3659                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3660                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3661                 /* Bugfix by brain, do not allow people to enter bad configurations */
3662                 if (L.Name != ServerInstance->Config->ServerName)
3663                 {
3664                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3665                         {
3666                                 ValidIPs.push_back(L.IPAddr);
3667
3668                                 if (Allow.length())
3669                                         ValidIPs.push_back(Allow);
3670
3671                                 /* Needs resolving */
3672                                 insp_inaddr binip;
3673                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3674                                 {
3675                                         try
3676                                         {
3677                                                 SecurityIPResolver* sr = new SecurityIPResolver(ServerInstance, L.IPAddr, L);
3678                                                 ServerInstance->AddResolver(sr);
3679                                         }
3680                                         catch (ModuleException& e)
3681                                         {
3682                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3683                                         }
3684                                 }
3685
3686                                 LinkBlocks.push_back(L);
3687                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3688                         }
3689                         else
3690                         {
3691                                 if (L.IPAddr == "")
3692                                 {
3693                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3694                                 }
3695                                 else if (L.RecvPass == "")
3696                                 {
3697                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3698                                 }
3699                                 else if (L.SendPass == "")
3700                                 {
3701                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3702                                 }
3703                                 else if (L.Name == "")
3704                                 {
3705                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3706                                 }
3707                                 else if (!L.Port)
3708                                 {
3709                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3710                                 }
3711                         }
3712                 }
3713                 else
3714                 {
3715                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3716                 }
3717         }
3718         DELETE(Conf);
3719 }
3720
3721
3722 class ModuleSpanningTree : public Module
3723 {
3724         std::vector<TreeSocket*> Bindings;
3725         int line;
3726         int NumServers;
3727         unsigned int max_local;
3728         unsigned int max_global;
3729         cmd_rconnect* command_rconnect;
3730
3731  public:
3732
3733         ModuleSpanningTree(InspIRCd* Me)
3734                 : Module::Module(Me), max_local(0), max_global(0)
3735         {
3736
3737                 Bindings.clear();
3738
3739                 ::ServerInstance = Me;
3740
3741                 // Create the root of the tree
3742                 TreeRoot = new TreeServer(ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3743
3744                 ReadConfiguration(true);
3745
3746                 command_rconnect = new cmd_rconnect(ServerInstance, this);
3747                 ServerInstance->AddCommand(command_rconnect);
3748         }
3749
3750         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3751         {
3752                 std::string Parent = TreeRoot->GetName();
3753                 if (Current->GetParent())
3754                 {
3755                         Parent = Current->GetParent()->GetName();
3756                 }
3757                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3758                 {
3759                         if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3760                         {
3761                                 if (*user->oper)
3762                                 {
3763                                          ShowLinks(Current->GetChild(q),user,hops+1);
3764                                 }
3765                         }
3766                         else
3767                         {
3768                                 ShowLinks(Current->GetChild(q),user,hops+1);
3769                         }
3770                 }
3771                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3772                 if ((HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3773                         return;
3774                 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());
3775         }
3776
3777         int CountLocalServs()
3778         {
3779                 return TreeRoot->ChildCount();
3780         }
3781
3782         int CountServs()
3783         {
3784                 return serverlist.size();
3785         }
3786
3787         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3788         {
3789                 ShowLinks(TreeRoot,user,0);
3790                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3791                 return;
3792         }
3793
3794         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3795         {
3796                 unsigned int n_users = ServerInstance->UserCount();
3797
3798                 /* Only update these when someone wants to see them, more efficient */
3799                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3800                         max_local = ServerInstance->LocalUserCount();
3801                 if (n_users > max_global)
3802                         max_global = n_users;
3803
3804                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3805                 if (ServerInstance->OperCount())
3806                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3807                 if (ServerInstance->UnregisteredUserCount())
3808                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3809                 if (ServerInstance->ChannelCount())
3810                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3811                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3812                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3813                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3814                 return;
3815         }
3816
3817         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3818
3819         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3820         {
3821                 if (line < 128)
3822                 {
3823                         for (int t = 0; t < depth; t++)
3824                         {
3825                                 matrix[line][t] = ' ';
3826                         }
3827
3828                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3829                         // a 'Spacer' String to compensate.
3830                         char spacer[40];
3831
3832                         memset(spacer,' ',40);
3833                         if ((40 - Current->GetName().length() - depth) > 1) {
3834                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3835                         }
3836                         else
3837                         {
3838                                 spacer[5] = '\0';
3839                         }
3840
3841                         float percent;
3842                         char text[80];
3843                         if (ServerInstance->clientlist.size() == 0) {
3844                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3845                                 percent = 0;
3846                         }
3847                         else
3848                         {
3849                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3850                         }
3851                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3852                         totusers += Current->GetUserCount();
3853                         totservers++;
3854                         strlcpy(&matrix[line][depth],text,80);
3855                         line++;
3856                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3857                         {
3858                                 if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3859                                 {
3860                                         if (*user->oper)
3861                                         {
3862                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3863                                         }
3864                                 }
3865                                 else
3866                                 {
3867                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3868                                 }
3869                         }
3870                 }
3871         }
3872
3873         int HandleMotd(const char** parameters, int pcnt, userrec* user)
3874         {
3875                 if (pcnt > 0)
3876                 {
3877                         /* Remote MOTD, the server is within the 1st parameter */
3878                         std::deque<std::string> params;
3879                         params.push_back(parameters[0]);
3880
3881                         /* Send it out remotely, generate no reply yet */
3882                         TreeServer* s = FindServerMask(parameters[0]);
3883                         if (s)
3884                         {
3885                                 DoOneToOne(user->nick, "MOTD", params, s->GetName());
3886                         }
3887                         else
3888                         {
3889                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3890                         }
3891                         return 1;
3892                 }
3893                 return 0;
3894         }
3895
3896         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
3897         {
3898                 if (pcnt > 0)
3899                 {
3900                         /* Remote ADMIN, the server is within the 1st parameter */
3901                         std::deque<std::string> params;
3902                         params.push_back(parameters[0]);
3903
3904                         /* Send it out remotely, generate no reply yet */
3905                         TreeServer* s = FindServerMask(parameters[0]);
3906                         if (s)
3907                         {
3908                                 DoOneToOne(user->nick, "ADMIN", params, s->GetName());
3909                         }
3910                         else
3911                         {
3912                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3913                         }
3914                         return 1;
3915                 }
3916                 return 0;
3917         }
3918
3919         int HandleStats(const char** parameters, int pcnt, userrec* user)
3920         {
3921                 if (pcnt > 1)
3922                 {
3923                         /* Remote STATS, the server is within the 2nd parameter */
3924                         std::deque<std::string> params;
3925                         params.push_back(parameters[0]);
3926                         params.push_back(parameters[1]);
3927                         /* Send it out remotely, generate no reply yet */
3928                         TreeServer* s = FindServerMask(parameters[1]);
3929                         if (s)
3930                         {
3931                                 params[1] = s->GetName();
3932                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
3933                         }
3934                         else
3935                         {
3936                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3937                         }
3938                         return 1;
3939                 }
3940                 return 0;
3941         }
3942
3943         // Ok, prepare to be confused.
3944         // After much mulling over how to approach this, it struck me that
3945         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3946         // keeping track of a ton of ascii characters, and line by line
3947         // under recursion working out where to place them using multiplications
3948         // and divisons, we instead render the map onto a backplane of characters
3949         // (a character matrix), then draw the branches as a series of "L" shapes
3950         // from the nodes. This is not only friendlier on CPU it uses less stack.
3951
3952         void HandleMap(const char** parameters, int pcnt, userrec* user)
3953         {
3954                 // This array represents a virtual screen which we will
3955                 // "scratch" draw to, as the console device of an irc
3956                 // client does not provide for a proper terminal.
3957                 float totusers = 0;
3958                 float totservers = 0;
3959                 char matrix[128][80];
3960                 for (unsigned int t = 0; t < 128; t++)
3961                 {
3962                         matrix[t][0] = '\0';
3963                 }
3964                 line = 0;
3965                 // The only recursive bit is called here.
3966                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3967                 // Process each line one by one. The algorithm has a limit of
3968                 // 128 servers (which is far more than a spanning tree should have
3969                 // anyway, so we're ok). This limit can be raised simply by making
3970                 // the character matrix deeper, 128 rows taking 10k of memory.
3971                 for (int l = 1; l < line; l++)
3972                 {
3973                         // scan across the line looking for the start of the
3974                         // servername (the recursive part of the algorithm has placed
3975                         // the servers at indented positions depending on what they
3976                         // are related to)
3977                         int first_nonspace = 0;
3978                         while (matrix[l][first_nonspace] == ' ')
3979                         {
3980                                 first_nonspace++;
3981                         }
3982                         first_nonspace--;
3983                         // Draw the `- (corner) section: this may be overwritten by
3984                         // another L shape passing along the same vertical pane, becoming
3985                         // a |- (branch) section instead.
3986                         matrix[l][first_nonspace] = '-';
3987                         matrix[l][first_nonspace-1] = '`';
3988                         int l2 = l - 1;
3989                         // Draw upwards until we hit the parent server, causing possibly
3990                         // other corners (`-) to become branches (|-)
3991                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3992                         {
3993                                 matrix[l2][first_nonspace-1] = '|';
3994                                 l2--;
3995                         }
3996                 }
3997                 // dump the whole lot to the user. This is the easy bit, honest.
3998                 for (int t = 0; t < line; t++)
3999                 {
4000                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4001                 }
4002                 float avg_users = totusers / totservers;
4003                 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);
4004         user->WriteServ("007 %s :End of /MAP",user->nick);
4005                 return;
4006         }
4007
4008         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4009         {
4010                 TreeServer* s = FindServerMask(parameters[0]);
4011                 if (s)
4012                 {
4013                         if (s == TreeRoot)
4014                         {
4015                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4016                                 return 1;
4017                         }
4018                         TreeSocket* sock = s->GetSocket();
4019                         if (sock)
4020                         {
4021                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4022                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4023                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
4024                                 ServerInstance->SE->DelFd(sock);
4025                                 sock->Close();
4026                                 delete sock;
4027                         }
4028                         else
4029                         {
4030                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
4031                         }
4032                 }
4033                 else
4034                 {
4035                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4036                 }
4037                 return 1;
4038         }
4039
4040         int HandleTime(const char** parameters, int pcnt, userrec* user)
4041         {
4042                 if ((IS_LOCAL(user)) && (pcnt))
4043                 {
4044                         TreeServer* found = FindServerMask(parameters[0]);
4045                         if (found)
4046                         {
4047                                 // we dont' override for local server
4048                                 if (found == TreeRoot)
4049                                         return 0;
4050
4051                                 std::deque<std::string> params;
4052                                 params.push_back(found->GetName());
4053                                 params.push_back(user->nick);
4054                                 DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4055                         }
4056                         else
4057                         {
4058                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4059                         }
4060                 }
4061                 return 1;
4062         }
4063
4064         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4065         {
4066                 if ((IS_LOCAL(user)) && (pcnt > 1))
4067                 {
4068                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4069                         if ((remote) && (remote->GetFd() < 0))
4070                         {
4071                                 std::deque<std::string> params;
4072                                 params.push_back(parameters[1]);
4073                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
4074                                 return 1;
4075                         }
4076                         else if (!remote)
4077                         {
4078                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4079                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4080                                 return 1;
4081                         }
4082                 }
4083                 return 0;
4084         }
4085
4086         void DoPingChecks(time_t curtime)
4087         {
4088                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
4089                 {
4090                         TreeServer* serv = TreeRoot->GetChild(j);
4091                         TreeSocket* sock = serv->GetSocket();
4092                         if (sock)
4093                         {
4094                                 if (curtime >= serv->NextPingTime())
4095                                 {
4096                                         if (serv->AnsweredLastPing())
4097                                         {
4098                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4099                                                 serv->SetNextPingTime(curtime + 60);
4100                                         }
4101                                         else
4102                                         {
4103                                                 // they didnt answer, boot them
4104                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4105                                                 sock->Squit(serv,"Ping timeout");
4106                                                 ServerInstance->SE->DelFd(sock);
4107                                                 sock->Close();
4108                                                 delete sock;
4109                                                 return;
4110                                         }
4111                                 }
4112                         }
4113                 }
4114         }
4115
4116         void ConnectServer(Link* x)
4117         {
4118                 insp_inaddr binip;
4119
4120                 /* Do we already have an IP? If so, no need to resolve it. */
4121                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4122                 {
4123                         TreeSocket* newsocket = new TreeSocket(ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4124                         if (newsocket->GetFd() > -1)
4125                         {
4126                                 /* Handled automatically on success */
4127                         }
4128                         else
4129                         {
4130                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4131                                 delete newsocket;
4132                                 this->DoFailOver(x);
4133                         }
4134                 }
4135                 else
4136                 {
4137                         try
4138                         {
4139                                 ServernameResolver* snr = new ServernameResolver(ServerInstance,x->IPAddr, *x);
4140                                 ServerInstance->AddResolver(snr);
4141                         }
4142                         catch (ModuleException& e)
4143                         {
4144                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4145                                 this->DoFailOver(x);
4146                         }
4147                 }
4148         }
4149
4150         void DoFailOver(Link* x)
4151         {
4152                 if (x->FailOver.length())
4153                 {
4154                         if (x->FailOver == x->Name)
4155                         {
4156                                 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());
4157                                 return;
4158                         }
4159                         Link* TryThisOne = this->FindLink(x->FailOver.c_str());
4160                         if (TryThisOne)
4161                         {
4162                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
4163                                 ConnectServer(TryThisOne);
4164                         }
4165                         else
4166                         {
4167                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
4168                         }
4169                 }
4170         }
4171
4172         Link* FindLink(const std::string& name)
4173         {
4174                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4175                 {
4176                         if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
4177                         {
4178                                 return &(*x);
4179                         }
4180                 }
4181                 return NULL;
4182         }
4183
4184         void AutoConnectServers(time_t curtime)
4185         {
4186                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4187                 {
4188                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4189                         {
4190                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4191                                 x->NextConnectTime = curtime + x->AutoConnect;
4192                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4193                                 if (x->FailOver.length())
4194                                 {
4195                                         TreeServer* CheckFailOver = FindServer(x->FailOver.c_str());
4196                                         if (CheckFailOver)
4197                                         {
4198                                                 /* The failover for this server is currently a member of the network.
4199                                                  * The failover probably succeeded, where the main link did not.
4200                                                  * Don't try the main link until the failover is gone again.
4201                                                  */
4202                                                 continue;
4203                                         }
4204                                 }
4205                                 if (!CheckDupe)
4206                                 {
4207                                         // an autoconnected server is not connected. Check if its time to connect it
4208                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4209                                         this->ConnectServer(&(*x));
4210                                 }
4211                         }
4212                 }
4213         }
4214
4215         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4216         {
4217                 // we've already checked if pcnt > 0, so this is safe
4218                 TreeServer* found = FindServerMask(parameters[0]);
4219                 if (found)
4220                 {
4221                         std::string Version = found->GetVersion();
4222                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4223                         if (found == TreeRoot)
4224                         {
4225                                 std::stringstream out(ServerInstance->Config->data005);
4226                                 std::string token = "";
4227                                 std::string line5 = "";
4228                                 int token_counter = 0;
4229
4230                                 while (!out.eof())
4231                                 {
4232                                         out >> token;
4233                                         line5 = line5 + token + " ";
4234                                         token_counter++;
4235
4236                                         if ((token_counter >= 13) || (out.eof() == true))
4237                                         {
4238                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4239                                                 line5 = "";
4240                                                 token_counter = 0;
4241                                         }
4242                                 }
4243                         }
4244                 }
4245                 else
4246                 {
4247                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4248                 }
4249                 return 1;
4250         }
4251
4252         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4253         {
4254                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4255                 {
4256                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4257                         {
4258                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4259                                 if (!CheckDupe)
4260                                 {
4261                                         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);
4262                                         ConnectServer(&(*x));
4263                                         return 1;
4264                                 }
4265                                 else
4266                                 {
4267                                         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());
4268                                         return 1;
4269                                 }
4270                         }
4271                 }
4272                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4273                 return 1;
4274         }
4275
4276         virtual int OnStats(char statschar, userrec* user, string_list &results)
4277         {
4278                 if (statschar == 'c')
4279                 {
4280                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
4281                         {
4282                                 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');
4283                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
4284                         }
4285                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4286                         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);
4287                         return 1;
4288                 }
4289                 return 0;
4290         }
4291
4292         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4293         {
4294                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4295                 if (!validated)
4296                         return 0;
4297
4298                 if (command == "CONNECT")
4299                 {
4300                         return this->HandleConnect(parameters,pcnt,user);
4301                 }
4302                 else if (command == "STATS")
4303                 {
4304                         return this->HandleStats(parameters,pcnt,user);
4305                 }
4306                 else if (command == "MOTD")
4307                 {
4308                         return this->HandleMotd(parameters,pcnt,user);
4309                 }
4310                 else if (command == "ADMIN")
4311                 {
4312                         return this->HandleAdmin(parameters,pcnt,user);
4313                 }
4314                 else if (command == "SQUIT")
4315                 {
4316                         return this->HandleSquit(parameters,pcnt,user);
4317                 }
4318                 else if (command == "MAP")
4319                 {
4320                         this->HandleMap(parameters,pcnt,user);
4321                         return 1;
4322                 }
4323                 else if ((command == "TIME") && (pcnt > 0))
4324                 {
4325                         return this->HandleTime(parameters,pcnt,user);
4326                 }
4327                 else if (command == "LUSERS")
4328                 {
4329                         this->HandleLusers(parameters,pcnt,user);
4330                         return 1;
4331                 }
4332                 else if (command == "LINKS")
4333                 {
4334                         this->HandleLinks(parameters,pcnt,user);
4335                         return 1;
4336                 }
4337                 else if (command == "WHOIS")
4338                 {
4339                         if (pcnt > 1)
4340                         {
4341                                 // remote whois
4342                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4343                         }
4344                 }
4345                 else if ((command == "VERSION") && (pcnt > 0))
4346                 {
4347                         this->HandleVersion(parameters,pcnt,user);
4348                         return 1;
4349                 }
4350
4351                 return 0;
4352         }
4353
4354         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4355         {
4356                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4357                 {
4358                         // this bit of code cleverly routes all module commands
4359                         // to all remote severs *automatically* so that modules
4360                         // can just handle commands locally, without having
4361                         // to have any special provision in place for remote
4362                         // commands and linking protocols.
4363                         std::deque<std::string> params;
4364                         params.clear();
4365                         for (int j = 0; j < pcnt; j++)
4366                         {
4367                                 if (strchr(parameters[j],' '))
4368                                 {
4369                                         params.push_back(":" + std::string(parameters[j]));
4370                                 }
4371                                 else
4372                                 {
4373                                         params.push_back(std::string(parameters[j]));
4374                                 }
4375                         }
4376                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4377                         DoOneToMany(user->nick,command,params);
4378                 }
4379         }
4380
4381         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4382         {
4383                 TreeServer* s = FindServer(servername);
4384                 if (s)
4385                 {
4386                         description = s->GetDesc();
4387                 }
4388         }
4389
4390         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4391         {
4392                 if (IS_LOCAL(source))
4393                 {
4394                         std::deque<std::string> params;
4395                         params.push_back(dest->nick);
4396                         params.push_back(channel->name);
4397                         DoOneToMany(source->nick,"INVITE",params);
4398                 }
4399         }
4400
4401         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4402         {
4403                 std::deque<std::string> params;
4404                 params.push_back(chan->name);
4405                 params.push_back(":"+topic);
4406                 DoOneToMany(user->nick,"TOPIC",params);
4407         }
4408
4409         virtual void OnWallops(userrec* user, const std::string &text)
4410         {
4411                 if (IS_LOCAL(user))
4412                 {
4413                         std::deque<std::string> params;
4414                         params.push_back(":"+text);
4415                         DoOneToMany(user->nick,"WALLOPS",params);
4416                 }
4417         }
4418
4419         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4420         {
4421                 if (target_type == TYPE_USER)
4422                 {
4423                         userrec* d = (userrec*)dest;
4424                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4425                         {
4426                                 std::deque<std::string> params;
4427                                 params.clear();
4428                                 params.push_back(d->nick);
4429                                 params.push_back(":"+text);
4430                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4431                         }
4432                 }
4433                 else if (target_type == TYPE_CHANNEL)
4434                 {
4435                         if (IS_LOCAL(user))
4436                         {
4437                                 chanrec *c = (chanrec*)dest;
4438                                 if (c)
4439                                 {
4440                                         std::string cname = c->name;
4441                                         if (status)
4442                                                 cname = status + cname;
4443                                         std::deque<TreeServer*> list;
4444                                         GetListOfServersForChannel(c,list);
4445                                         unsigned int ucount = list.size();
4446                                         for (unsigned int i = 0; i < ucount; i++)
4447                                         {
4448                                                 TreeSocket* Sock = list[i]->GetSocket();
4449                                                 if (Sock)
4450                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4451                                         }
4452                                 }
4453                         }
4454                 }
4455                 else if (target_type == TYPE_SERVER)
4456                 {
4457                         if (IS_LOCAL(user))
4458                         {
4459                                 char* target = (char*)dest;
4460                                 std::deque<std::string> par;
4461                                 par.push_back(target);
4462                                 par.push_back(":"+text);
4463                                 DoOneToMany(user->nick,"NOTICE",par);
4464                         }
4465                 }
4466         }
4467
4468         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4469         {
4470                 if (target_type == TYPE_USER)
4471                 {
4472                         // route private messages which are targetted at clients only to the server
4473                         // which needs to receive them
4474                         userrec* d = (userrec*)dest;
4475                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4476                         {
4477                                 std::deque<std::string> params;
4478                                 params.clear();
4479                                 params.push_back(d->nick);
4480                                 params.push_back(":"+text);
4481                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4482                         }
4483                 }
4484                 else if (target_type == TYPE_CHANNEL)
4485                 {
4486                         if (IS_LOCAL(user))
4487                         {
4488                                 chanrec *c = (chanrec*)dest;
4489                                 if (c)
4490                                 {
4491                                         std::string cname = c->name;
4492                                         if (status)
4493                                                 cname = status + cname;
4494                                         std::deque<TreeServer*> list;
4495                                         GetListOfServersForChannel(c,list);
4496                                         unsigned int ucount = list.size();
4497                                         for (unsigned int i = 0; i < ucount; i++)
4498                                         {
4499                                                 TreeSocket* Sock = list[i]->GetSocket();
4500                                                 if (Sock)
4501                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4502                                         }
4503                                 }
4504                         }
4505                 }
4506                 else if (target_type == TYPE_SERVER)
4507                 {
4508                         if (IS_LOCAL(user))
4509                         {
4510                                 char* target = (char*)dest;
4511                                 std::deque<std::string> par;
4512                                 par.push_back(target);
4513                                 par.push_back(":"+text);
4514                                 DoOneToMany(user->nick,"PRIVMSG",par);
4515                         }
4516                 }
4517         }
4518
4519         virtual void OnBackgroundTimer(time_t curtime)
4520         {
4521                 AutoConnectServers(curtime);
4522                 DoPingChecks(curtime);
4523         }
4524
4525         virtual void OnUserJoin(userrec* user, chanrec* channel)
4526         {
4527                 // Only do this for local users
4528                 if (IS_LOCAL(user))
4529                 {
4530                         std::deque<std::string> params;
4531                         params.clear();
4532                         params.push_back(channel->name);
4533                         // set up their permissions and the channel TS with FJOIN.
4534                         // All users are FJOINed now, because a module may specify
4535                         // new joining permissions for the user.
4536                         params.clear();
4537                         params.push_back(channel->name);
4538                         params.push_back(ConvToStr(channel->age));
4539                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4540                         DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4541                 }
4542         }
4543
4544         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4545         {
4546                 // only occurs for local clients
4547                 if (user->registered != REG_ALL)
4548                         return;
4549                 std::deque<std::string> params;
4550                 params.push_back(newhost);
4551                 DoOneToMany(user->nick,"FHOST",params);
4552         }
4553
4554         virtual void OnChangeName(userrec* user, const std::string &gecos)
4555         {
4556                 // only occurs for local clients
4557                 if (user->registered != REG_ALL)
4558                         return;
4559                 std::deque<std::string> params;
4560                 params.push_back(gecos);
4561                 DoOneToMany(user->nick,"FNAME",params);
4562         }
4563
4564         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4565         {
4566                 if (IS_LOCAL(user))
4567                 {
4568                         std::deque<std::string> params;
4569                         params.push_back(channel->name);
4570                         if (partmessage != "")
4571                                 params.push_back(":"+partmessage);
4572                         DoOneToMany(user->nick,"PART",params);
4573                 }
4574         }
4575
4576         virtual void OnUserConnect(userrec* user)
4577         {
4578                 char agestr[MAXBUF];
4579                 if (IS_LOCAL(user))
4580                 {
4581                         std::deque<std::string> params;
4582                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4583                         params.push_back(agestr);
4584                         params.push_back(user->nick);
4585                         params.push_back(user->host);
4586                         params.push_back(user->dhost);
4587                         params.push_back(user->ident);
4588                         params.push_back("+"+std::string(user->FormatModes()));
4589                         params.push_back(user->GetIPString());
4590                         params.push_back(":"+std::string(user->fullname));
4591                         DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4592
4593                         // User is Local, change needs to be reflected!
4594                         TreeServer* SourceServer = FindServer(user->server);
4595                         if (SourceServer)
4596                         {
4597                                 SourceServer->AddUserCount();
4598                         }
4599
4600                 }
4601         }
4602
4603         virtual void OnUserQuit(userrec* user, const std::string &reason)
4604         {
4605                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4606                 {
4607                         std::deque<std::string> params;
4608                         params.push_back(":"+reason);
4609                         DoOneToMany(user->nick,"QUIT",params);
4610                 }
4611                 // Regardless, We need to modify the user Counts..
4612                 TreeServer* SourceServer = FindServer(user->server);
4613                 if (SourceServer)
4614                 {
4615                         SourceServer->DelUserCount();
4616                 }
4617
4618         }
4619
4620         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4621         {
4622                 if (IS_LOCAL(user))
4623                 {
4624                         std::deque<std::string> params;
4625                         params.push_back(user->nick);
4626                         DoOneToMany(oldnick,"NICK",params);
4627                 }
4628         }
4629
4630         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4631         {
4632                 if ((source) && (IS_LOCAL(source)))
4633                 {
4634                         std::deque<std::string> params;
4635                         params.push_back(chan->name);
4636                         params.push_back(user->nick);
4637                         params.push_back(":"+reason);
4638                         DoOneToMany(source->nick,"KICK",params);
4639                 }
4640                 else if (!source)
4641                 {
4642                         std::deque<std::string> params;
4643                         params.push_back(chan->name);
4644                         params.push_back(user->nick);
4645                         params.push_back(":"+reason);
4646                         DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4647                 }
4648         }
4649
4650         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4651         {
4652                 std::deque<std::string> params;
4653                 params.push_back(dest->nick);
4654                 params.push_back(":"+reason);
4655                 DoOneToMany(source->nick,"KILL",params);
4656         }
4657
4658         virtual void OnRehash(const std::string &parameter)
4659         {
4660                 if (parameter != "")
4661                 {
4662                         std::deque<std::string> params;
4663                         params.push_back(parameter);
4664                         DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4665                         // check for self
4666                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4667                         {
4668                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4669                                 ServerInstance->RehashServer();
4670                         }
4671                 }
4672                 ReadConfiguration(false);
4673         }
4674
4675         // note: the protocol does not allow direct umode +o except
4676         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4677         // locally.
4678         virtual void OnOper(userrec* user, const std::string &opertype)
4679         {
4680                 if (IS_LOCAL(user))
4681                 {
4682                         std::deque<std::string> params;
4683                         params.push_back(opertype);
4684                         DoOneToMany(user->nick,"OPERTYPE",params);
4685                 }
4686         }
4687
4688         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4689         {
4690                 if (IS_LOCAL(source))
4691                 {
4692                         char type[8];
4693                         snprintf(type,8,"%cLINE",linetype);
4694                         std::string stype = type;
4695                         if (adding)
4696                         {
4697                                 char sduration[MAXBUF];
4698                                 snprintf(sduration,MAXBUF,"%ld",duration);
4699                                 std::deque<std::string> params;
4700                                 params.push_back(host);
4701                                 params.push_back(sduration);
4702                                 params.push_back(":"+reason);
4703                                 DoOneToMany(source->nick,stype,params);
4704                         }
4705                         else
4706                         {
4707                                 std::deque<std::string> params;
4708                                 params.push_back(host);
4709                                 DoOneToMany(source->nick,stype,params);
4710                         }
4711                 }
4712         }
4713
4714         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4715         {
4716                 OnLine(source,hostmask,true,'G',duration,reason);
4717         }
4718
4719         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4720         {
4721                 OnLine(source,ipmask,true,'Z',duration,reason);
4722         }
4723
4724         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4725         {
4726                 OnLine(source,nickmask,true,'Q',duration,reason);
4727         }
4728
4729         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4730         {
4731                 OnLine(source,hostmask,true,'E',duration,reason);
4732         }
4733
4734         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4735         {
4736                 OnLine(source,hostmask,false,'G',0,"");
4737         }
4738
4739         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4740         {
4741                 OnLine(source,ipmask,false,'Z',0,"");
4742         }
4743
4744         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4745         {
4746                 OnLine(source,nickmask,false,'Q',0,"");
4747         }
4748
4749         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4750         {
4751                 OnLine(source,hostmask,false,'E',0,"");
4752         }
4753
4754         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4755         {
4756                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4757                 {
4758                         if (target_type == TYPE_USER)
4759                         {
4760                                 userrec* u = (userrec*)dest;
4761                                 std::deque<std::string> params;
4762                                 params.push_back(u->nick);
4763                                 params.push_back(text);
4764                                 DoOneToMany(user->nick,"MODE",params);
4765                         }
4766                         else
4767                         {
4768                                 chanrec* c = (chanrec*)dest;
4769                                 std::deque<std::string> params;
4770                                 params.push_back(c->name);
4771                                 params.push_back(text);
4772                                 DoOneToMany(user->nick,"MODE",params);
4773                         }
4774                 }
4775         }
4776
4777         virtual void OnSetAway(userrec* user)
4778         {
4779                 if (IS_LOCAL(user))
4780                 {
4781                         std::deque<std::string> params;
4782                         params.push_back(":"+std::string(user->awaymsg));
4783                         DoOneToMany(user->nick,"AWAY",params);
4784                 }
4785         }
4786
4787         virtual void OnCancelAway(userrec* user)
4788         {
4789                 if (IS_LOCAL(user))
4790                 {
4791                         std::deque<std::string> params;
4792                         params.clear();
4793                         DoOneToMany(user->nick,"AWAY",params);
4794                 }
4795         }
4796
4797         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4798         {
4799                 TreeSocket* s = (TreeSocket*)opaque;
4800                 if (target)
4801                 {
4802                         if (target_type == TYPE_USER)
4803                         {
4804                                 userrec* u = (userrec*)target;
4805                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4806                         }
4807                         else
4808                         {
4809                                 chanrec* c = (chanrec*)target;
4810                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4811                         }
4812                 }
4813         }
4814
4815         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4816         {
4817                 TreeSocket* s = (TreeSocket*)opaque;
4818                 if (target)
4819                 {
4820                         if (target_type == TYPE_USER)
4821                         {
4822                                 userrec* u = (userrec*)target;
4823                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4824                         }
4825                         else if (target_type == TYPE_OTHER)
4826                         {
4827                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4828                         }
4829                         else if (target_type == TYPE_CHANNEL)
4830                         {
4831                                 chanrec* c = (chanrec*)target;
4832                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4833                         }
4834                 }
4835         }
4836
4837         virtual void OnEvent(Event* event)
4838         {
4839                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4840
4841                 if (event->GetEventID() == "send_metadata")
4842                 {
4843                         if (params->size() < 3)
4844                                 return;
4845                         (*params)[2] = ":" + (*params)[2];
4846                         DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4847                 }
4848                 else if (event->GetEventID() == "send_topic")
4849                 {
4850                         if (params->size() < 2)
4851                                 return;
4852                         (*params)[1] = ":" + (*params)[1];
4853                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
4854                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time()));
4855                         DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
4856                 }
4857                 else if (event->GetEventID() == "send_mode")
4858                 {
4859                         if (params->size() < 2)
4860                                 return;
4861                         // Insert the TS value of the object, either userrec or chanrec
4862                         time_t ourTS = 0;
4863                         userrec* a = ServerInstance->FindNick((*params)[0]);
4864                         if (a)
4865                         {
4866                                 ourTS = a->age;
4867                         }
4868                         else
4869                         {
4870                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4871                                 if (a)
4872                                 {
4873                                         ourTS = a->age;
4874                                 }
4875                         }
4876                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4877                         DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4878                 }
4879         }
4880
4881         virtual ~ModuleSpanningTree()
4882         {
4883         }
4884
4885         virtual Version GetVersion()
4886         {
4887                 return Version(1,1,0,2,VF_STATIC|VF_VENDOR,API_VERSION);
4888         }
4889
4890         void Implements(char* List)
4891         {
4892                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
4893                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
4894                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
4895                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
4896                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
4897                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
4898                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
4899         }
4900
4901         /* It is IMPORTANT that m_spanningtree is the last module in the chain
4902          * so that any activity it sees is FINAL, e.g. we arent going to send out
4903          * a NICK message before m_cloaking has finished putting the +x on the user,
4904          * etc etc.
4905          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
4906          * the module call queue.
4907          */
4908         Priority Prioritize()
4909         {
4910                 return PRIORITY_LAST;
4911         }
4912 };
4913
4914 void DoFailOver(Link* x)
4915 {
4916         TreeProtocolModule->DoFailOver(x);
4917 }
4918
4919 Link* FindLink(const std::string& name)
4920 {
4921         return TreeProtocolModule->FindLink(name);
4922 }
4923
4924 class ModuleSpanningTreeFactory : public ModuleFactory
4925 {
4926  public:
4927         ModuleSpanningTreeFactory()
4928         {
4929         }
4930
4931         ~ModuleSpanningTreeFactory()
4932         {
4933         }
4934
4935         virtual Module * CreateModule(InspIRCd* Me)
4936         {
4937                 TreeProtocolModule = new ModuleSpanningTree(Me);
4938                 return TreeProtocolModule;
4939         }
4940
4941 };
4942
4943
4944 extern "C" void * init_module( void )
4945 {
4946         return new ModuleSpanningTreeFactory;
4947 }