src/modules/m_spanningtree.cpp

   1 /*   +------------------------------------+
   2  *   | Inspire Internet Relay Chat Daemon |
   3  *   +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                     E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* $ModDesc: Povides a spanning tree server link protocol */
  18
  19 using namespace std;
  20
  21 #include "configreader.h"
  22 #include "users.h"
  23 #include "channels.h"
  24 #include "modules.h"
  25 #include "commands/cmd_whois.h"
  26 #include "commands/cmd_stats.h"
  27 #include "socket.h"
  28 #include "inspircd.h"
  29 #include "wildcard.h"
  30 #include "xline.h"
  31 #include "cull_list.h"
  32 #include "aes.h"
  33
  34 #define nspace __gnu_cxx
  35
  36
  37 /** If you make a change which breaks the protocol, increment this.
  38  * If you  completely change the protocol, completely change the number.
  39  */
  40 const long ProtocolVersion = 1101;
  41
  42 /*
  43  * The server list in InspIRCd is maintained as two structures
  44  * which hold the data in different ways. Most of the time, we
  45  * want to very quicky obtain three pieces of information:
  46  *
  47  * (1) The information on a server
  48  * (2) The information on the server we must send data through
  49  *     to actually REACH the server we're after
  50  * (3) Potentially, the child/parent objects of this server
  51  *
  52  * The InspIRCd spanning protocol provides easy access to these
  53  * by storing the data firstly in a recursive structure, where
  54  * each item references its parent item, and a dynamic list
  55  * of child items, and another structure which stores the items
  56  * hashed, linearly. This means that if we want to find a server
  57  * by name quickly, we can look it up in the hash, avoiding
  58  * any O(n) lookups. If however, during a split or sync, we want
  59  * to apply an operation to a server, and any of its child objects
  60  * we can resort to recursion to walk the tree structure.
  61  */
  62
  63 using irc::sockets::MatchCIDR;
  64
  65 class ModuleSpanningTree;
  66 static ModuleSpanningTree* TreeProtocolModule;
  67 static InspIRCd* ServerInstance;
  68
  69 /** Any socket can have one of five states at any one time.
  70  * The LISTENER state indicates a socket which is listening
  71  * for connections. It cannot receive data itself, only incoming
  72  * sockets.
  73  * The CONNECTING state indicates an outbound socket which is
  74  * waiting to be writeable.
  75  * The WAIT_AUTH_1 state indicates the socket is outbound and
  76  * has successfully connected, but has not yet sent and received
  77  * SERVER strings.
  78  * The WAIT_AUTH_2 state indicates that the socket is inbound
  79  * (allocated by a LISTENER) but has not yet sent and received
  80  * SERVER strings.
  81  * The CONNECTED state represents a fully authorized, fully
  82  * connected server.
  83  */
  84 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  85
  86 /* Foward declarations */
  87 class TreeServer;
  88 class TreeSocket;
  89
  90 /* This variable represents the root of the server tree
  91  * (for all intents and purposes, it's us)
  92  */
  93 TreeServer *TreeRoot;
  94
  95 /* This hash_map holds the hash equivalent of the server
  96  * tree, used for rapid linear lookups.
  97  */
  98 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
  99 server_hash serverlist;
 100
 101 typedef nspace::hash_map<std::string, userrec*> uid_hash;
 102 typedef nspace::hash_map<std::string, char*> sid_hash;
 103
 104 /* More forward declarations */
 105 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 106 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 107 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 108 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 109 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 110 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 111 void ReadConfiguration(bool rebind);
 112
 113 /* Flatten links and /MAP for non-opers */
 114 bool FlatLinks;
 115 /* Hide U-Lined servers in /MAP and /LINKS */
 116 bool HideULines;
 117
 118 std::vector<std::string> ValidIPs;
 119
 120 class UserManager : public classbase
 121 {
 122         uid_hash uids;
 123         sid_hash sids;
 124  public:
 125         UserManager()
 126         {
 127                 uids.clear();
 128                 sids.clear();
 129         }
 130
 131         std::string UserToUID(userrec* user)
 132         {
 133                 return "";
 134         }
 135
 136         std::string UIDToUser(const std::string &UID)
 137         {
 138                 return "";
 139         }
 140
 141         std::string CreateAndAdd(userrec* user)
 142         {
 143                 return "";
 144         }
 145
 146         std::string CreateAndAdd(const std::string &servername)
 147         {
 148                 return "";
 149         }
 150
 151         std::string ServerToSID(const std::string &servername)
 152         {
 153                 return "";
 154         }
 155
 156         std::string SIDToServer(const std::string &SID)
 157         {
 158                 return "";
 159         }
 160
 161         userrec* FindByID(const std::string &UID)
 162         {
 163                 return NULL;
 164         }
 165 };
 166
 167
 168 /** Each server in the tree is represented by one class of
 169  * type TreeServer. A locally connected TreeServer can
 170  * have a class of type TreeSocket associated with it, for
 171  * remote servers, the TreeSocket entry will be NULL.
 172  * Each server also maintains a pointer to its parent
 173  * (NULL if this server is ours, at the top of the tree)
 174  * and a pointer to its "Route" (see the comments in the
 175  * constructors below), and also a dynamic list of pointers
 176  * to its children which can be iterated recursively
 177  * if required. Creating or deleting objects of type
 178  i* TreeServer automatically maintains the hash_map of
 179  * TreeServer items, deleting and inserting them as they
 180  * are created and destroyed.
 181  */
 182 class TreeServer : public classbase
 183 {
 184         InspIRCd* ServerInstance;               /* Creator */
 185         TreeServer* Parent;                     /* Parent entry */
 186         TreeServer* Route;                      /* Route entry */
 187         std::vector<TreeServer*> Children;      /* List of child objects */
 188         irc::string ServerName;                 /* Server's name */
 189         std::string ServerDesc;                 /* Server's description */
 190         std::string VersionString;              /* Version string or empty string */
 191         int UserCount;                          /* Not used in this version */
 192         int OperCount;                          /* Not used in this version */
 193         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 194         time_t NextPing;                        /* After this time, the server should be PINGed*/
 195         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 196
 197  public:
 198
 199         /** We don't use this constructor. Its a dummy, and won't cause any insertion
 200          * of the TreeServer into the hash_map. See below for the two we DO use.
 201          */
 202         TreeServer(InspIRCd* Instance) : ServerInstance(Instance)
 203         {
 204                 Parent = NULL;
 205                 ServerName = "";
 206                 ServerDesc = "";
 207                 VersionString = "";
 208                 UserCount = OperCount = 0;
 209                 VersionString = ServerInstance->GetVersionString();
 210         }
 211
 212         /** We use this constructor only to create the 'root' item, TreeRoot, which
 213          * represents our own server. Therefore, it has no route, no parent, and
 214          * no socket associated with it. Its version string is our own local version.
 215          */
 216         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc)
 217         {
 218                 Parent = NULL;
 219                 VersionString = "";
 220                 UserCount = OperCount = 0;
 221                 VersionString = ServerInstance->GetVersionString();
 222                 Route = NULL;
 223                 Socket = NULL; /* Fix by brain */
 224                 AddHashEntry();
 225         }
 226
 227         /** When we create a new server, we call this constructor to initialize it.
 228          * This constructor initializes the server's Route and Parent, and sets up
 229          * its ping counters so that it will be pinged one minute from now.
 230          */
 231         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 232                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 233         {
 234                 VersionString = "";
 235                 UserCount = OperCount = 0;
 236                 this->SetNextPingTime(time(NULL) + 60);
 237                 this->SetPingFlag();
 238
 239                 /* find the 'route' for this server (e.g. the one directly connected
 240                  * to the local server, which we can use to reach it)
 241                  *
 242                  * In the following example, consider we have just added a TreeServer
 243                  * class for server G on our network, of which we are server A.
 244                  * To route traffic to G (marked with a *) we must send the data to
 245                  * B (marked with a +) so this algorithm initializes the 'Route'
 246                  * value to point at whichever server traffic must be routed through
 247                  * to get here. If we were to try this algorithm with server B,
 248                  * the Route pointer would point at its own object ('this').
 249                  *
 250                  *              A
 251                  *             / \
 252                  *          + B   C
 253                  *           / \   \
 254                  *          D   E   F
 255                  *         /         \
 256                  *      * G           H
 257                  *
 258                  * We only run this algorithm when a server is created, as
 259                  * the routes remain constant while ever the server exists, and
 260                  * do not need to be re-calculated.
 261                  */
 262
 263                 Route = Above;
 264                 if (Route == TreeRoot)
 265                 {
 266                         Route = this;
 267                 }
 268                 else
 269                 {
 270                         while (this->Route->GetParent() != TreeRoot)
 271                         {
 272                                 this->Route = Route->GetParent();
 273                         }
 274                 }
 275
 276                 /* Because recursive code is slow and takes a lot of resources,
 277                  * we store two representations of the server tree. The first
 278                  * is a recursive structure where each server references its
 279                  * children and its parent, which is used for netbursts and
 280                  * netsplits to dump the whole dataset to the other server,
 281                  * and the second is used for very fast lookups when routing
 282                  * messages and is instead a hash_map, where each item can
 283                  * be referenced by its server name. The AddHashEntry()
 284                  * call below automatically inserts each TreeServer class
 285                  * into the hash_map as it is created. There is a similar
 286                  * maintainance call in the destructor to tidy up deleted
 287                  * servers.
 288                  */
 289
 290                 this->AddHashEntry();
 291         }
 292
 293         int QuitUsers(const std::string &reason)
 294         {
 295                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 296                 const char* reason_s = reason.c_str();
 297                 std::vector<userrec*> time_to_die;
 298                 for (user_hash::iterator n = ServerInstance->clientlist.begin(); n != ServerInstance->clientlist.end(); n++)
 299                 {
 300                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 301                         {
 302                                 time_to_die.push_back(n->second);
 303                         }
 304                 }
 305                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 306                 {
 307                         userrec* a = (userrec*)*n;
 308                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 309                         if (!IS_LOCAL(a))
 310                                 userrec::QuitUser(ServerInstance,a,reason_s);
 311                 }
 312                 return time_to_die.size();
 313         }
 314
 315         /** This method is used to add the structure to the
 316          * hash_map for linear searches. It is only called
 317          * by the constructors.
 318          */
 319         void AddHashEntry()
 320         {
 321                 server_hash::iterator iter;
 322                 iter = serverlist.find(this->ServerName.c_str());
 323                 if (iter == serverlist.end())
 324                         serverlist[this->ServerName.c_str()] = this;
 325         }
 326
 327         /** This method removes the reference to this object
 328          * from the hash_map which is used for linear searches.
 329          * It is only called by the default destructor.
 330          */
 331         void DelHashEntry()
 332         {
 333                 server_hash::iterator iter;
 334                 iter = serverlist.find(this->ServerName.c_str());
 335                 if (iter != serverlist.end())
 336                         serverlist.erase(iter);
 337         }
 338
 339         /** These accessors etc should be pretty self-
 340          * explanitory.
 341          */
 342         TreeServer* GetRoute()
 343         {
 344                 return Route;
 345         }
 346
 347         std::string GetName()
 348         {
 349                 return ServerName.c_str();
 350         }
 351
 352         std::string GetDesc()
 353         {
 354                 return ServerDesc;
 355         }
 356
 357         std::string GetVersion()
 358         {
 359                 return VersionString;
 360         }
 361
 362         void SetNextPingTime(time_t t)
 363         {
 364                 this->NextPing = t;
 365                 LastPingWasGood = false;
 366         }
 367
 368         time_t NextPingTime()
 369         {
 370                 return NextPing;
 371         }
 372
 373         bool AnsweredLastPing()
 374         {
 375                 return LastPingWasGood;
 376         }
 377
 378         void SetPingFlag()
 379         {
 380                 LastPingWasGood = true;
 381         }
 382
 383         int GetUserCount()
 384         {
 385                 return UserCount;
 386         }
 387
 388         void AddUserCount()
 389         {
 390                 UserCount++;
 391         }
 392
 393         void DelUserCount()
 394         {
 395                 UserCount--;
 396         }
 397
 398         int GetOperCount()
 399         {
 400                 return OperCount;
 401         }
 402
 403         TreeSocket* GetSocket()
 404         {
 405                 return Socket;
 406         }
 407
 408         TreeServer* GetParent()
 409         {
 410                 return Parent;
 411         }
 412
 413         void SetVersion(std::string Version)
 414         {
 415                 VersionString = Version;
 416         }
 417
 418         unsigned int ChildCount()
 419         {
 420                 return Children.size();
 421         }
 422
 423         TreeServer* GetChild(unsigned int n)
 424         {
 425                 if (n < Children.size())
 426                 {
 427                         /* Make sure they  cant request
 428                          * an out-of-range object. After
 429                          * all we know what these programmer
 430                          * types are like *grin*.
 431                          */
 432                         return Children[n];
 433                 }
 434                 else
 435                 {
 436                         return NULL;
 437                 }
 438         }
 439
 440         void AddChild(TreeServer* Child)
 441         {
 442                 Children.push_back(Child);
 443         }
 444
 445         bool DelChild(TreeServer* Child)
 446         {
 447                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 448                 {
 449                         if (*a == Child)
 450                         {
 451                                 Children.erase(a);
 452                                 return true;
 453                         }
 454                 }
 455                 return false;
 456         }
 457
 458         /** Removes child nodes of this node, and of that node, etc etc.
 459          * This is used during netsplits to automatically tidy up the
 460          * server tree. It is slow, we don't use it for much else.
 461          */
 462         bool Tidy()
 463         {
 464                 bool stillchildren = true;
 465                 while (stillchildren)
 466                 {
 467                         stillchildren = false;
 468                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 469                         {
 470                                 TreeServer* s = (TreeServer*)*a;
 471                                 s->Tidy();
 472                                 Children.erase(a);
 473                                 DELETE(s);
 474                                 stillchildren = true;
 475                                 break;
 476                         }
 477                 }
 478                 return true;
 479         }
 480
 481         ~TreeServer()
 482         {
 483                 /* We'd better tidy up after ourselves, eh? */
 484                 this->DelHashEntry();
 485         }
 486 };
 487
 488 /** The Link class might as well be a struct,
 489  * but this is C++ and we don't believe in structs (!).
 490  * It holds the entire information of one <link>
 491  * tag from the main config file. We maintain a list
 492  * of them, and populate the list on rehash/load.
 493  */
 494 class Link : public classbase
 495 {
 496  public:
 497         irc::string Name;
 498         std::string IPAddr;
 499         int Port;
 500         std::string SendPass;
 501         std::string RecvPass;
 502         unsigned long AutoConnect;
 503         time_t NextConnectTime;
 504         std::string EncryptionKey;
 505         bool HiddenFromStats;
 506         irc::string FailOver;
 507 };
 508
 509 void DoFailOver(Link* x);
 510 Link* FindLink(const std::string& name);
 511
 512 /* The usual stuff for inspircd modules,
 513  * plus the vector of Link classes which we
 514  * use to store the <link> tags from the config
 515  * file.
 516  */
 517 ConfigReader *Conf;
 518 std::vector<Link> LinkBlocks;
 519
 520 /** Yay for fast searches!
 521  * This is hundreds of times faster than recursion
 522  * or even scanning a linked list, especially when
 523  * there are more than a few servers to deal with.
 524  * (read as: lots).
 525  */
 526 TreeServer* FindServer(std::string ServerName)
 527 {
 528         server_hash::iterator iter;
 529         iter = serverlist.find(ServerName.c_str());
 530         if (iter != serverlist.end())
 531         {
 532                 return iter->second;
 533         }
 534         else
 535         {
 536                 return NULL;
 537         }
 538 }
 539
 540 /** Returns the locally connected server we must route a
 541  * message through to reach server 'ServerName'. This
 542  * only applies to one-to-one and not one-to-many routing.
 543  * See the comments for the constructor of TreeServer
 544  * for more details.
 545  */
 546 TreeServer* BestRouteTo(std::string ServerName)
 547 {
 548         if (ServerName.c_str() == TreeRoot->GetName())
 549                 return NULL;
 550         TreeServer* Found = FindServer(ServerName);
 551         if (Found)
 552         {
 553                 return Found->GetRoute();
 554         }
 555         else
 556         {
 557                 return NULL;
 558         }
 559 }
 560
 561 /** Find the first server matching a given glob mask.
 562  * Theres no find-using-glob method of hash_map [awwww :-(]
 563  * so instead, we iterate over the list using an iterator
 564  * and match each one until we get a hit. Yes its slow,
 565  * deal with it.
 566  */
 567 TreeServer* FindServerMask(std::string ServerName)
 568 {
 569         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 570         {
 571                 if (match(i->first.c_str(),ServerName.c_str()))
 572                         return i->second;
 573         }
 574         return NULL;
 575 }
 576
 577 /* A convenient wrapper that returns true if a server exists */
 578 bool IsServer(std::string ServerName)
 579 {
 580         return (FindServer(ServerName) != NULL);
 581 }
 582
 583
 584 class cmd_rconnect : public command_t
 585 {
 586         Module* Creator;
 587  public:
 588         cmd_rconnect (InspIRCd* Instance, Module* Callback) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback)
 589         {
 590                 this->source = "m_spanningtree.so";
 591                 syntax = "<remote-server-mask> <servermask>";
 592         }
 593
 594         CmdResult Handle (const char** parameters, int pcnt, userrec *user)
 595         {
 596                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 597                 /* Is this aimed at our server? */
 598                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 599                 {
 600                         /* Yes, initiate the given connect */
 601                         ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 602                         const char* para[1];
 603                         para[0] = parameters[1];
 604                         std::string original_command = std::string("CONNECT ") + parameters[1];
 605                         Creator->OnPreCommand("CONNECT", para, 1, user, true, original_command);
 606
 607                         return CMD_SUCCESS;
 608                 }
 609
 610                 return CMD_FAILURE;
 611         }
 612 };
 613
 614
 615
 616 /** Every SERVER connection inbound or outbound is represented by
 617  * an object of type TreeSocket.
 618  * TreeSockets, being inherited from InspSocket, can be tied into
 619  * the core socket engine, and we cn therefore receive activity events
 620  * for them, just like activex objects on speed. (yes really, that
 621  * is a technical term!) Each of these which relates to a locally
 622  * connected server is assocated with it, by hooking it onto a
 623  * TreeSocket class using its constructor. In this way, we can
 624  * maintain a list of servers, some of which are directly connected,
 625  * some of which are not.
 626  */
 627 class TreeSocket : public InspSocket
 628 {
 629         std::string myhost;
 630         std::string in_buffer;
 631         ServerState LinkState;
 632         std::string InboundServerName;
 633         std::string InboundDescription;
 634         int num_lost_users;
 635         int num_lost_servers;
 636         time_t NextPing;
 637         bool LastPingWasGood;
 638         bool bursting;
 639         AES* ctx_in;
 640         AES* ctx_out;
 641         unsigned int keylength;
 642         std::string ModuleList;
 643         std::map<std::string,std::string> CapKeys;
 644
 645  public:
 646
 647         /** Because most of the I/O gubbins are encapsulated within
 648          * InspSocket, we just call the superclass constructor for
 649          * most of the action, and append a few of our own values
 650          * to it.
 651          */
 652         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime)
 653                 : InspSocket(SI, host, port, listening, maxtime)
 654         {
 655                 myhost = host;
 656                 this->LinkState = LISTENER;
 657                 this->ctx_in = NULL;
 658                 this->ctx_out = NULL;
 659         }
 660
 661         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 662                 : InspSocket(SI, host, port, listening, maxtime)
 663         {
 664                 myhost = ServerName;
 665                 this->LinkState = CONNECTING;
 666                 this->ctx_in = NULL;
 667                 this->ctx_out = NULL;
 668         }
 669
 670         /** When a listening socket gives us a new file descriptor,
 671          * we must associate it with a socket without creating a new
 672          * connection. This constructor is used for this purpose.
 673          */
 674         TreeSocket(InspIRCd* SI, int newfd, char* ip)
 675                 : InspSocket(SI, newfd, ip)
 676         {
 677                 this->LinkState = WAIT_AUTH_1;
 678                 this->ctx_in = NULL;
 679                 this->ctx_out = NULL;
 680                 this->SendCapabilities();
 681         }
 682
 683         ~TreeSocket()
 684         {
 685                 if (ctx_in)
 686                         DELETE(ctx_in);
 687                 if (ctx_out)
 688                         DELETE(ctx_out);
 689         }
 690
 691         void InitAES(std::string key,std::string SName)
 692         {
 693                 if (key == "")
 694                         return;
 695
 696                 ctx_in = new AES();
 697                 ctx_out = new AES();
 698                 Instance->Log(DEBUG,"Initialized AES key %s",key.c_str());
 699                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 700                 keylength = key.length();
 701                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 702                 {
 703                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 704                         Instance->Log(DEBUG,"Key length not 16, 24 or 32 characters!");
 705                 }
 706                 else
 707                 {
 708                         this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 709                         ctx_in->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 710                                 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 711                         ctx_out->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 712                                 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 713                 }
 714         }
 715
 716         /** When an outbound connection finishes connecting, we receive
 717          * this event, and must send our SERVER string to the other
 718          * side. If the other side is happy, as outlined in the server
 719          * to server docs on the inspircd.org site, the other side
 720          * will then send back its own server string.
 721          */
 722         virtual bool OnConnected()
 723         {
 724                 if (this->LinkState == CONNECTING)
 725                 {
 726                         /* we do not need to change state here. */
 727                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 728                         {
 729                                 if (x->Name == this->myhost)
 730                                 {
 731                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] established.");
 732                                         this->SendCapabilities();
 733                                         if (x->EncryptionKey != "")
 734                                         {
 735                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 736                                                 {
 737                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 738                                                 }
 739                                                 else
 740                                                 {
 741                                                         this->WriteLine(std::string("AES ")+this->Instance->Config->ServerName);
 742                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 743                                                 }
 744                                         }
 745                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 746                                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 747                                         return true;
 748                                 }
 749                         }
 750                 }
 751                 /* There is a (remote) chance that between the /CONNECT and the connection
 752                  * being accepted, some muppet has removed the <link> block and rehashed.
 753                  * If that happens the connection hangs here until it's closed. Unlikely
 754                  * and rather harmless.
 755                  */
 756                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 757                 return true;
 758         }
 759
 760         virtual void OnError(InspSocketError e)
 761         {
 762                 /* We don't handle this method, because all our
 763                  * dirty work is done in OnClose() (see below)
 764                  * which is still called on error conditions too.
 765                  */
 766                 if (e == I_ERR_CONNECT)
 767                 {
 768                         this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
 769                         Link* MyLink = FindLink(myhost);
 770                         if (MyLink)
 771                                 DoFailOver(MyLink);
 772                 }
 773         }
 774
 775         virtual int OnDisconnect()
 776         {
 777                 /* For the same reason as above, we don't
 778                  * handle OnDisconnect()
 779                  */
 780                 return true;
 781         }
 782
 783         /** Recursively send the server tree with distances as hops.
 784          * This is used during network burst to inform the other server
 785          * (and any of ITS servers too) of what servers we know about.
 786          * If at any point any of these servers already exist on the other
 787          * end, our connection may be terminated. The hopcounts given
 788          * by this function are relative, this doesn't matter so long as
 789          * they are all >1, as all the remote servers re-calculate them
 790          * to be relative too, with themselves as hop 0.
 791          */
 792         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 793         {
 794                 char command[1024];
 795                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 796                 {
 797                         TreeServer* recursive_server = Current->GetChild(q);
 798                         if (recursive_server != s)
 799                         {
 800                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 801                                 this->WriteLine(command);
 802                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 803                                 /* down to next level */
 804                                 this->SendServers(recursive_server, s, hops+1);
 805                         }
 806                 }
 807         }
 808
 809         std::string MyCapabilities()
 810         {
 811                 std::vector<std::string> modlist;
 812                 std::string capabilities = "";
 813
 814                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 815                 {
 816                         if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
 817                                 modlist.push_back(this->Instance->Config->module_names[i]);
 818                 }
 819                 sort(modlist.begin(),modlist.end());
 820                 for (unsigned int i = 0; i < modlist.size(); i++)
 821                 {
 822                         if (i)
 823                                 capabilities = capabilities + ",";
 824                         capabilities = capabilities + modlist[i];
 825                 }
 826                 return capabilities;
 827         }
 828
 829         void SendCapabilities()
 830         {
 831                 irc::commasepstream modulelist(MyCapabilities());
 832
 833                 this->WriteLine("CAPAB START");
 834
 835                 /* Send module names, split at 509 length */
 836                 std::string item = "*";
 837                 std::string line = "CAPAB MODULES ";
 838                 while ((item = modulelist.GetToken()) != "")
 839                 {
 840                         if (line.length() + item.length() + 1 > 509)
 841                         {
 842                                 this->WriteLine(line);
 843                                 line = "CAPAB MODULES ";
 844                         }
 845
 846                         if (line != "CAPAB MODULES ")
 847                                 line.append(",");
 848
 849                         line.append(item);
 850                 }
 851                 if (line != "CAPAB MODULES ")
 852                         this->WriteLine(line);
 853
 854                 int ip6 = 0;
 855                 int ip6support = 0;
 856 #ifdef IPV6
 857                 ip6 = 1;
 858 #endif
 859 #ifdef SUPPORT_IP6LINKS
 860                 ip6support = 1;
 861 #endif
 862                 this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support)+" PROTOCOL="+ConvToStr(ProtocolVersion));
 863
 864                 this->WriteLine("CAPAB END");
 865         }
 866
 867         /* Check a comma seperated list for an item */
 868         bool HasItem(const std::string &list, const std::string &item)
 869         {
 870                 irc::commasepstream seplist(list);
 871
 872                 std::string item2 = "*";
 873                 while ((item2 = seplist.GetToken()) != "")
 874                 {
 875                         if (item2 == item)
 876                                 return true;
 877                 }
 878
 879                 return false;
 880         }
 881
 882         /* Isolate and return the elements that are different between two comma seperated lists */
 883         std::string ListDifference(const std::string &one, const std::string &two)
 884         {
 885                 irc::commasepstream list_one(one);
 886                 std::string item = "*";
 887                 std::string result = "";
 888                 while ((item = list_one.GetToken()) != "")
 889                 {
 890                         if (!HasItem(two, item))
 891                         {
 892                                 result.append(" ");
 893                                 result.append(item);
 894                         }
 895                 }
 896                 return result;
 897         }
 898
 899         bool Capab(std::deque<std::string> params)
 900         {
 901                 if (params.size() < 1)
 902                 {
 903                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 904                         return false;
 905                 }
 906
 907                 if (params[0] == "START")
 908                 {
 909                         this->ModuleList = "";
 910                         this->CapKeys.clear();
 911                 }
 912                 else if (params[0] == "END")
 913                 {
 914                         std::string reason = "";
 915                         int ip6support = 0;
 916 #ifdef SUPPORT_IP6LINKS
 917                         ip6support = 1;
 918 #endif
 919                         /* Compare ModuleList and check CapKeys...
 920                          * Maybe this could be tidier? -- Brain
 921                          */
 922                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 923                         {
 924                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 925                                 if (!diff.length())
 926                                 {
 927                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 928                                 }
 929                                 else
 930                                 {
 931                                         diff = "this server:" + diff;
 932                                 }
 933                                 if (diff.length() == 12)
 934                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 935                                 else
 936                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 937                         }
 938
 939                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 940                                 reason = "We don't both support linking to IPV6 servers";
 941
 942                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 943                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 944
 945                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 946                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 947
 948                         if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
 949                         {
 950                                 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
 951                                 {
 952                                         reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
 953                                 }
 954                                 else
 955                                 {
 956                                         reason = "Protocol version not specified";
 957                                 }
 958                         }
 959
 960                         if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
 961                                 reason = "We don't both have halfop support enabled/disabled identically";
 962
 963                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 964                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 965
 966                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 967                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 968
 969                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 970                                 reason = "Maximum modes per line differ or remote modes per line not specified";
 971
 972                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 973                                 reason = "Maximum quit lengths differ or remote quit length not specified";
 974
 975                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 976                                 reason = "Maximum topic lengths differ or remote topic length not specified";
 977
 978                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
 979                                 reason = "Maximum kick lengths differ or remote kick length not specified";
 980
 981                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
 982                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
 983
 984                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
 985                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
 986
 987                         if (reason.length())
 988                         {
 989                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
 990                                 return false;
 991                         }
 992                 }
 993                 else if ((params[0] == "MODULES") && (params.size() == 2))
 994                 {
 995                         if (!this->ModuleList.length())
 996                         {
 997                                 this->ModuleList.append(params[1]);
 998                         }
 999                         else
1000                         {
1001                                 this->ModuleList.append(",");
1002                                 this->ModuleList.append(params[1]);
1003                         }
1004                 }
1005                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
1006                 {
1007                         irc::tokenstream capabs(params[1]);
1008                         std::string item = "*";
1009                         while ((item = capabs.GetToken()) != "")
1010                         {
1011                                 /* Process each key/value pair */
1012                                 std::string::size_type equals = item.rfind('=');
1013                                 if (equals != std::string::npos)
1014                                 {
1015                                         std::string var = item.substr(0, equals);
1016                                         std::string value = item.substr(equals+1, item.length());
1017                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1018                                         CapKeys[var] = value;
1019                                 }
1020                         }
1021                 }
1022
1023                 return true;
1024         }
1025
1026         /** This function forces this server to quit, removing this server
1027          * and any users on it (and servers and users below that, etc etc).
1028          * It's very slow and pretty clunky, but luckily unless your network
1029          * is having a REAL bad hair day, this function shouldnt be called
1030          * too many times a month ;-)
1031          */
1032         void SquitServer(std::string &from, TreeServer* Current)
1033         {
1034                 /* recursively squit the servers attached to 'Current'.
1035                  * We're going backwards so we don't remove users
1036                  * while we still need them ;)
1037                  */
1038                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1039                 {
1040                         TreeServer* recursive_server = Current->GetChild(q);
1041                         this->SquitServer(from,recursive_server);
1042                 }
1043                 /* Now we've whacked the kids, whack self */
1044                 num_lost_servers++;
1045                 num_lost_users += Current->QuitUsers(from);
1046         }
1047
1048         /** This is a wrapper function for SquitServer above, which
1049          * does some validation first and passes on the SQUIT to all
1050          * other remaining servers.
1051          */
1052         void Squit(TreeServer* Current,std::string reason)
1053         {
1054                 if ((Current) && (Current != TreeRoot))
1055                 {
1056                         std::deque<std::string> params;
1057                         params.push_back(Current->GetName());
1058                         params.push_back(":"+reason);
1059                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1060                         if (Current->GetParent() == TreeRoot)
1061                         {
1062                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1063                         }
1064                         else
1065                         {
1066                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1067                         }
1068                         num_lost_servers = 0;
1069                         num_lost_users = 0;
1070                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1071                         SquitServer(from, Current);
1072                         Current->Tidy();
1073                         Current->GetParent()->DelChild(Current);
1074                         DELETE(Current);
1075                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1076                 }
1077                 else
1078                 {
1079                         Instance->Log(DEFAULT,"Squit from unknown server");
1080                 }
1081         }
1082
1083         /** FMODE command - server mode with timestamp checks */
1084         bool ForceMode(std::string source, std::deque<std::string> &params)
1085         {
1086                 /* Chances are this is a 1.0 FMODE without TS */
1087                 if (params.size() < 3)
1088                 {
1089                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
1090                         return false;
1091                 }
1092
1093                 bool smode = false;
1094                 std::string sourceserv;
1095
1096                 /* Are we dealing with an FMODE from a user, or from a server? */
1097                 userrec* who = this->Instance->FindNick(source);
1098                 if (who)
1099                 {
1100                         /* FMODE from a user, set sourceserv to the users server name */
1101                         sourceserv = who->server;
1102                 }
1103                 else
1104                 {
1105                         /* FMODE from a server, create a fake user to receive mode feedback */
1106                         who = new userrec(this->Instance);
1107                         who->SetFd(FD_MAGIC_NUMBER);
1108                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1109                         sourceserv = source;    /* Set sourceserv to the actual source string */
1110                 }
1111                 const char* modelist[64];
1112                 time_t TS = 0;
1113                 int n = 0;
1114                 memset(&modelist,0,sizeof(modelist));
1115                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1116                 {
1117                         if (q == 1)
1118                         {
1119                                 /* The timestamp is in this position.
1120                                  * We don't want to pass that up to the
1121                                  * server->client protocol!
1122                                  */
1123                                 TS = atoi(params[q].c_str());
1124                         }
1125                         else
1126                         {
1127                                 /* Everything else is fine to append to the modelist */
1128                                 modelist[n++] = params[q].c_str();
1129                         }
1130
1131                 }
1132                 /* Extract the TS value of the object, either userrec or chanrec */
1133                 userrec* dst = this->Instance->FindNick(params[0]);
1134                 chanrec* chan = NULL;
1135                 time_t ourTS = 0;
1136                 if (dst)
1137                 {
1138                         ourTS = dst->age;
1139                 }
1140                 else
1141                 {
1142                         chan = this->Instance->FindChan(params[0]);
1143                         if (chan)
1144                         {
1145                                 ourTS = chan->age;
1146                         }
1147                 }
1148
1149                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1150                  * with parameters.
1151                  */
1152                 if (TS == ourTS)
1153                 {
1154                         Instance->Log(DEBUG,"Entering TS equality check");
1155                         ModeHandler* mh = NULL;
1156                         unsigned long paramptr = 3;
1157                         std::string to_bounce = "";
1158                         std::string to_keep = "";
1159                         std::vector<std::string> params_to_keep;
1160                         std::string params_to_bounce = "";
1161                         bool adding = true;
1162                         char cur_change = 1;
1163                         char old_change = 0;
1164                         char old_bounce_change = 0;
1165                         /* Merge modes, basically do special stuff to mode with params */
1166                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1167                         {
1168                                 switch (*x)
1169                                 {
1170                                         case '-':
1171                                                 adding = false;
1172                                         break;
1173                                         case '+':
1174                                                 adding = true;
1175                                         break;
1176                                         default:
1177                                                 if (adding)
1178                                                 {
1179                                                         /* We only care about whats being set,
1180                                                          * not whats being unset
1181                                                          */
1182                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1183
1184                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1185                                                         {
1186                                                                 /* We only want to do special things to
1187                                                                  * modes with parameters, we are going to rewrite
1188                                                                  * those parameters
1189                                                                  */
1190                                                                 ModePair ret;
1191                                                                 adding ? cur_change = '+' : cur_change = '-';
1192
1193                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1194
1195                                                                 /* The mode is set here, check which we should keep */
1196                                                                 if (ret.first)
1197                                                                 {
1198                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1199
1200                                                                         if (which_to_keep == true)
1201                                                                         {
1202                                                                                 /* Keep ours, bounce theirs:
1203                                                                                  * Send back ours to them and
1204                                                                                  * drop their mode changs
1205                                                                                  */
1206                                                                                 adding ? cur_change = '+' : cur_change = '-';
1207                                                                                 if (cur_change != old_bounce_change)
1208                                                                                         to_bounce += cur_change;
1209                                                                                 to_bounce += *x;
1210                                                                                 old_bounce_change = cur_change;
1211
1212                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1213                                                                                         params_to_bounce.append(" ").append(ret.second);
1214                                                                         }
1215                                                                         else
1216                                                                         {
1217                                                                                 /* Keep theirs: Accept their mode change,
1218                                                                                  * do nothing else
1219                                                                                  */
1220                                                                                 adding ? cur_change = '+' : cur_change = '-';
1221                                                                                 if (cur_change != old_change)
1222                                                                                         to_keep += cur_change;
1223                                                                                 to_keep += *x;
1224                                                                                 old_change = cur_change;
1225
1226                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1227                                                                                         params_to_keep.push_back(params[paramptr]);
1228                                                                         }
1229                                                                 }
1230                                                                 else
1231                                                                 {
1232                                                                         /* Mode isnt set here, we want it */
1233                                                                         adding ? cur_change = '+' : cur_change = '-';
1234                                                                         if (cur_change != old_change)
1235                                                                                 to_keep += cur_change;
1236                                                                         to_keep += *x;
1237                                                                         old_change = cur_change;
1238
1239                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1240                                                                                 params_to_keep.push_back(params[paramptr]);
1241                                                                 }
1242
1243                                                                 paramptr++;
1244                                                         }
1245                                                         else
1246                                                         {
1247                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1248
1249                                                                 if (mh)
1250                                                                 {
1251                                                                         adding ? cur_change = '+' : cur_change = '-';
1252
1253                                                                         /* Just keep this, safe to merge with no checks
1254                                                                          * it has no parameters
1255                                                                          */
1256
1257                                                                         if (cur_change != old_change)
1258                                                                                 to_keep += cur_change;
1259                                                                         to_keep += *x;
1260                                                                         old_change = cur_change;
1261
1262                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1263                                                                         {
1264                                                                                 Instance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1265                                                                                 params_to_keep.push_back(params[paramptr++]);
1266                                                                         }
1267                                                                 }
1268                                                         }
1269                                                 }
1270                                                 else
1271                                                 {
1272                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1273
1274                                                         if (mh)
1275                                                         {
1276                                                                 /* Taking a mode away */
1277                                                                 adding ? cur_change = '+' : cur_change = '-';
1278
1279                                                                 if (cur_change != old_change)
1280                                                                         to_keep += cur_change;
1281                                                                 to_keep += *x;
1282                                                                 old_change = cur_change;
1283
1284                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1285                                                                         params_to_keep.push_back(params[paramptr++]);
1286                                                         }
1287                                                 }
1288                                         break;
1289                                 }
1290                         }
1291
1292                         if (to_bounce.length())
1293                         {
1294                                 std::deque<std::string> newparams;
1295                                 newparams.push_back(params[0]);
1296                                 newparams.push_back(ConvToStr(ourTS));
1297                                 newparams.push_back(to_bounce+params_to_bounce);
1298                                 Instance->Log(DEBUG,"BOUNCE BACK: %s",(to_bounce+params_to_bounce).c_str());
1299                                 DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1300                         }
1301
1302                         if (to_keep.length())
1303                         {
1304                                 unsigned int n = 2;
1305                                 unsigned int q = 0;
1306                                 modelist[0] = params[0].c_str();
1307                                 modelist[1] = to_keep.c_str();
1308
1309                                 if (params_to_keep.size() > 1)
1310                                 {
1311                                         for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
1312                                         {
1313                                                 Instance->Log(DEBUG,"KEEP Item %d of %d: %s", q, params_to_keep.size(), params_to_keep[q].c_str());
1314                                                 modelist[n++] = params_to_keep[q].c_str();
1315                                         }
1316                                 }
1317
1318                                 if (smode)
1319                                 {
1320                                         Instance->Log(DEBUG,"Send mode");
1321                                         this->Instance->SendMode(modelist, n+2, who);
1322                                 }
1323                                 else
1324                                 {
1325                                         Instance->Log(DEBUG,"Send mode client");
1326                                         this->Instance->CallCommandHandler("MODE", modelist, n+2, who);
1327                                 }
1328
1329                                 /* HOT POTATO! PASS IT ON! */
1330                                 DoOneToAllButSender(source,"FMODE",params,sourceserv);
1331                         }
1332                 }
1333                 else
1334                 /* U-lined servers always win regardless of their TS */
1335                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1336                 {
1337                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1338                          * SHOULD accept it, if its clock is right.
1339                          *
1340                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1341                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1342                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1343                          *
1344                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1345                          * writing the code. It took me a while to come up with this solution.
1346                          *
1347                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1348                          */
1349
1350                         std::deque<std::string> newparams;      /* New parameter list we send back */
1351                         newparams.push_back(params[0]);         /* Target, user or channel */
1352                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1353                         newparams.push_back("");                /* This contains the mode string. For now
1354                                                                  * it's empty, we fill it below.
1355                                                                  */
1356
1357                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1358                          * set to avoid a desync here.
1359                          */
1360                         std::string modebounce = "";
1361                         bool adding = true;
1362                         unsigned int t = 3;
1363                         ModeHandler* mh = NULL;
1364                         char cur_change = 1;
1365                         char old_change = 0;
1366                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1367                         {
1368                                 /* Iterate over all mode chars in the sent set */
1369                                 switch (*x)
1370                                 {
1371                                         /* Adding or subtracting modes? */
1372                                         case '-':
1373                                                 adding = false;
1374                                         break;
1375                                         case '+':
1376                                                 adding = true;
1377                                         break;
1378                                         default:
1379                                                 /* Find the mode handler for this mode */
1380                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1381
1382                                                 /* Got a mode handler?
1383                                                  * This also prevents us bouncing modes we have no handler for.
1384                                                  */
1385                                                 if (mh)
1386                                                 {
1387                                                         ModePair ret;
1388                                                         std::string p = "";
1389
1390                                                         /* Does the mode require a parameter right now?
1391                                                          * If it does, fetch it if we can
1392                                                          */
1393                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1394                                                                 p = params[t++];
1395
1396                                                         /* Call the ModeSet method to determine if its set with the
1397                                                          * given parameter here or not.
1398                                                          */
1399                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1400
1401                                                         /* XXX: Really. Dont ask.
1402                                                          * Determine from if its set combined with what the current
1403                                                          * 'state' is (adding or not) as to wether we should 'invert'
1404                                                          * or 'reinforce' the mode change
1405                                                          */
1406                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1407
1408                                                         /* Quickly determine if we have 'flipped' from + to -,
1409                                                          * or - to +, to prevent unneccessary +/- chars in the
1410                                                          * output string that waste bandwidth
1411                                                          */
1412                                                         if (cur_change != old_change)
1413                                                                 modebounce += cur_change;
1414                                                         old_change = cur_change;
1415
1416                                                         /* Add the mode character to the output string */
1417                                                         modebounce += mh->GetModeChar();
1418
1419                                                         /* We got a parameter back from ModeHandler::ModeSet,
1420                                                          * are we supposed to be sending one out right now?
1421                                                          */
1422                                                         if (ret.second.length())
1423                                                         {
1424                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1425                                                                         /* Yes we're supposed to be sending out
1426                                                                          * the parameter. Make sure it goes
1427                                                                          */
1428                                                                         newparams.push_back(ret.second);
1429                                                         }
1430
1431                                                 }
1432                                         break;
1433                                 }
1434                         }
1435
1436                         /* Update the parameters for FMODE with the new 'bounced' string */
1437                         newparams[2] = modebounce;
1438                         /* Only send it back the way it came, no need to send it anywhere else */
1439                         DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1440                         Instance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1441                 }
1442                 else
1443                 {
1444                         Instance->Log(DEBUG,"Allow modes, TS lower for sender");
1445                         /* The server was ulined, but something iffy is up with the TS.
1446                          * Sound the alarm bells!
1447                          */
1448                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1449                         {
1450                                 this->Instance->WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",sourceserv.c_str(),params[0].c_str());
1451                         }
1452                         /* Allow the mode, route it to either server or user command handling */
1453                         if (smode)
1454                                 this->Instance->SendMode(modelist,n,who);
1455                         else
1456                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1457
1458                         /* HOT POTATO! PASS IT ON! */
1459                         DoOneToAllButSender(source,"FMODE",params,sourceserv);
1460                 }
1461                 /* Are we supposed to free the userrec? */
1462                 if (smode)
1463                         DELETE(who);
1464
1465                 return true;
1466         }
1467
1468         /** FTOPIC command */
1469         bool ForceTopic(std::string source, std::deque<std::string> &params)
1470         {
1471                 if (params.size() != 4)
1472                         return true;
1473                 time_t ts = atoi(params[1].c_str());
1474                 std::string nsource = source;
1475
1476                 chanrec* c = this->Instance->FindChan(params[0]);
1477                 if (c)
1478                 {
1479                         if ((ts >= c->topicset) || (!*c->topic))
1480                         {
1481                                 std::string oldtopic = c->topic;
1482                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1483                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1484                                 c->topicset = ts;
1485                                 /* if the topic text is the same as the current topic,
1486                                  * dont bother to send the TOPIC command out, just silently
1487                                  * update the set time and set nick.
1488                                  */
1489                                 if (oldtopic != params[3])
1490                                 {
1491                                         userrec* user = this->Instance->FindNick(source);
1492                                         if (!user)
1493                                         {
1494                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1495                                         }
1496                                         else
1497                                         {
1498                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1499                                                 nsource = user->server;
1500                                         }
1501                                         /* all done, send it on its way */
1502                                         params[3] = ":" + params[3];
1503                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
1504                                 }
1505                         }
1506
1507                 }
1508
1509                 return true;
1510         }
1511
1512         /** FJOIN, similar to unreal SJOIN */
1513         bool ForceJoin(std::string source, std::deque<std::string> &params)
1514         {
1515                 if (params.size() < 3)
1516                         return true;
1517
1518                 char first[MAXBUF];
1519                 char modestring[MAXBUF];
1520                 char* mode_users[127];
1521                 memset(&mode_users,0,sizeof(mode_users));
1522                 mode_users[0] = first;
1523                 mode_users[1] = modestring;
1524                 strcpy(modestring,"+");
1525                 unsigned int modectr = 2;
1526
1527                 userrec* who = NULL;
1528                 std::string channel = params[0];
1529                 time_t TS = atoi(params[1].c_str());
1530                 char* key = "";
1531
1532                 chanrec* chan = this->Instance->FindChan(channel);
1533                 if (chan)
1534                 {
1535                         key = chan->key;
1536                 }
1537                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1538
1539                 /* default is a high value, which if we dont have this
1540                  * channel will let the other side apply their modes.
1541                  */
1542                 time_t ourTS = time(NULL)+600;
1543                 chanrec* us = this->Instance->FindChan(channel);
1544                 if (us)
1545                 {
1546                         ourTS = us->age;
1547                 }
1548
1549                 Instance->Log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
1550
1551                 irc::tokenstream users(params[2]);
1552                 std::string item = "*";
1553
1554                 /* do this first, so our mode reversals are correctly received by other servers
1555                  * if there is a TS collision.
1556                  */
1557                 params[2] = ":" + params[2];
1558                 DoOneToAllButSender(source,"FJOIN",params,source);
1559                 while (item != "")
1560                 {
1561                         item = users.GetToken();
1562                         /* process one user at a time, applying modes. */
1563                         char* usr = (char*)item.c_str();
1564                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1565                          * (is this even possible?) */
1566                         if (usr && *usr)
1567                         {
1568                                 char* permissions = usr;
1569                                 int ntimes = 0;
1570                                 while ((*permissions) && (*permissions != ','))
1571                                 {
1572                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1573                                         if (mh)
1574                                         {
1575                                                 ntimes++;
1576                                                 charlcat(modestring,mh->GetModeChar(),MAXBUF);
1577                                         }
1578                                         else
1579                                         {
1580                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",mh->GetPrefix());
1581                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+mh->GetModeChar()+"' in FJOIN");
1582                                                 return false;
1583                                         }
1584                                         usr++;
1585                                         permissions++;
1586                                 }
1587                                 usr++;
1588
1589                                 /* Did they get any modes? How many times? */
1590                                 for (int k = 0; k < ntimes; k++)
1591                                         mode_users[modectr++] = strdup(usr);
1592
1593                                 who = this->Instance->FindNick(usr);
1594                                 if (who)
1595                                 {
1596                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, key);
1597                                         if (modectr >= (MAXMODES-1))
1598                                         {
1599                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1600                                                  * if there are more than MAXMODES to go.
1601                                                  */
1602                                                 if ((ourTS >= TS) || (this->Instance->ULine(who->server)))
1603                                                 {
1604                                                         /* We also always let u-lined clients win, no matter what the TS value */
1605                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1606                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1607                                                         if (ourTS != TS)
1608                                                         {
1609                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1610                                                                 us->age = TS;
1611                                                                 ourTS = TS;
1612                                                         }
1613                                                 }
1614                                                 else
1615                                                 {
1616                                                         Instance->Log(DEBUG,"Their channel newer than ours, bouncing their modes");
1617                                                         /* bouncy bouncy! */
1618                                                         std::deque<std::string> params;
1619                                                         /* modes are now being UNSET... */
1620                                                         *mode_users[1] = '-';
1621                                                         for (unsigned int x = 0; x < modectr; x++)
1622                                                         {
1623                                                                 if (x == 1)
1624                                                                 {
1625                                                                         params.push_back(ConvToStr(us->age));
1626                                                                 }
1627                                                                 params.push_back(mode_users[x]);
1628
1629                                                         }
1630                                                         // tell everyone to bounce the modes. bad modes, bad!
1631                                                         DoOneToMany(this->Instance->Config->ServerName,"FMODE",params);
1632                                                 }
1633                                                 strcpy(mode_users[1],"+");
1634                                                 for (unsigned int f = 2; f < modectr; f++)
1635                                                         free(mode_users[f]);
1636                                                 modectr = 2;
1637                                         }
1638                                 }
1639                                 else
1640                                 {
1641                                         Instance->Log(SPARSE,"Warning! Invalid user %s in FJOIN to channel %s IGNORED", who->nick, channel.c_str());
1642                                         continue;
1643                                 }
1644                         }
1645                 }
1646                 /* there werent enough modes built up to flush it during FJOIN,
1647                  * or, there are a number left over. flush them out.
1648                  */
1649                 if ((modectr > 2) && (who) && (us))
1650                 {
1651                         if (ourTS >= TS)
1652                         {
1653                                 Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1654                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1655                                 if (ourTS != TS)
1656                                 {
1657                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1658                                         us->age = TS;
1659                                         ourTS = TS;
1660                                 }
1661                         }
1662                         else
1663                         {
1664                                 Instance->Log(DEBUG,"Their channel newer than ours, bouncing their modes");
1665                                 std::deque<std::string> params;
1666                                 *mode_users[1] = '-';
1667                                 for (unsigned int x = 0; x < modectr; x++)
1668                                 {
1669                                         if (x == 1)
1670                                         {
1671                                                 params.push_back(ConvToStr(us->age));
1672                                         }
1673                                         params.push_back(mode_users[x]);
1674                                 }
1675                                 DoOneToMany(this->Instance->Config->ServerName,"FMODE",params);
1676                         }
1677
1678                         for (unsigned int f = 2; f < modectr; f++)
1679                                 free(mode_users[f]);
1680                 }
1681                 return true;
1682         }
1683
1684         /** NICK command */
1685         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1686         {
1687                 if (params.size() < 8)
1688                         return true;
1689                 if (params.size() > 8)
1690                 {
1691                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1692                         return true;
1693                 }
1694                 // NICK age nick host dhost ident +modes ip :gecos
1695                 //       0    1   2     3     4      5   6     7
1696                 time_t age = atoi(params[0].c_str());
1697
1698                 /* This used to have a pretty craq'y loop doing the same thing,
1699                  * now we just let the STL do the hard work (more efficiently)
1700                  */
1701                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1702                 if (pos_after_plus != std::string::npos)
1703                         params[5] = params[5].substr(pos_after_plus);
1704
1705                 const char* tempnick = params[1].c_str();
1706                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1707
1708                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1709
1710                 if (iter != this->Instance->clientlist.end())
1711                 {
1712                         // nick collision
1713                         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);
1714                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1715                         return true;
1716                 }
1717
1718                 userrec* _new = new userrec(this->Instance);
1719                 this->Instance->clientlist[tempnick] = _new;
1720                 _new->SetFd(FD_MAGIC_NUMBER);
1721                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1722                 strlcpy(_new->host, params[2].c_str(),63);
1723                 strlcpy(_new->dhost, params[3].c_str(),63);
1724                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1725                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1726                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1727                 _new->registered = REG_ALL;
1728                 _new->signon = age;
1729
1730                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1731                         _new->modes[(*v)-65] = 1;
1732
1733 #ifdef SUPPORT_IP6LINKS
1734                 if (params[6].find_first_of(":") != std::string::npos)
1735                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1736                 else
1737 #endif
1738                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1739
1740                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1741
1742                 params[7] = ":" + params[7];
1743                 DoOneToAllButSender(source,"NICK",params,source);
1744
1745                 // Increment the Source Servers User Count..
1746                 TreeServer* SourceServer = FindServer(source);
1747                 if (SourceServer)
1748                 {
1749                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1750                         SourceServer->AddUserCount();
1751                 }
1752
1753                 return true;
1754         }
1755
1756         /** Send one or more FJOINs for a channel of users.
1757          * If the length of a single line is more than 480-NICKMAX
1758          * in length, it is split over multiple lines.
1759          */
1760         void SendFJoins(TreeServer* Current, chanrec* c)
1761         {
1762                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1763                 char list[MAXBUF];
1764                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1765
1766                 size_t dlen, curlen;
1767                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1768                 int numusers = 0;
1769                 char* ptr = list + dlen;
1770
1771                 CUList *ulist = c->GetUsers();
1772                 std::vector<userrec*> specific_halfop;
1773                 std::vector<userrec*> specific_voice;
1774                 std::string modes = "";
1775                 std::string params = "";
1776
1777                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1778                 {
1779                         // The first parameter gets a : before it
1780                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1781
1782                         curlen += ptrlen;
1783                         ptr += ptrlen;
1784
1785                         numusers++;
1786
1787                         if (curlen > (480-NICKMAX))
1788                         {
1789                                 this->WriteLine(list);
1790                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1791                                 ptr = list + dlen;
1792                                 ptrlen = 0;
1793                                 numusers = 0;
1794                         }
1795                 }
1796
1797                 if (numusers)
1798                         this->WriteLine(list);
1799
1800                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1801                 {
1802                         modes.append("b");
1803                         params.append(b->data).append(" ");
1804                 }
1805                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1806         }
1807
1808         /** Send G, Q, Z and E lines */
1809         void SendXLines(TreeServer* Current)
1810         {
1811                 char data[MAXBUF];
1812                 std::string n = this->Instance->Config->ServerName;
1813                 const char* sn = n.c_str();
1814                 int iterations = 0;
1815                 /* Yes, these arent too nice looking, but they get the job done */
1816                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1817                 {
1818                         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);
1819                         this->WriteLine(data);
1820                 }
1821                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1822                 {
1823                         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);
1824                         this->WriteLine(data);
1825                 }
1826                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1827                 {
1828                         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);
1829                         this->WriteLine(data);
1830                 }
1831                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1832                 {
1833                         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);
1834                         this->WriteLine(data);
1835                 }
1836                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1837                 {
1838                         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);
1839                         this->WriteLine(data);
1840                 }
1841                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1842                 {
1843                         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);
1844                         this->WriteLine(data);
1845                 }
1846                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1847                 {
1848                         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);
1849                         this->WriteLine(data);
1850                 }
1851                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1852                 {
1853                         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);
1854                         this->WriteLine(data);
1855                 }
1856         }
1857
1858         /** Send channel modes and topics */
1859         void SendChannelModes(TreeServer* Current)
1860         {
1861                 char data[MAXBUF];
1862                 std::deque<std::string> list;
1863                 int iterations = 0;
1864                 std::string n = this->Instance->Config->ServerName;
1865                 const char* sn = n.c_str();
1866                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1867                 {
1868                         SendFJoins(Current, c->second);
1869                         if (*c->second->topic)
1870                         {
1871                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1872                                 this->WriteLine(data);
1873                         }
1874                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1875                         list.clear();
1876                         c->second->GetExtList(list);
1877                         for (unsigned int j = 0; j < list.size(); j++)
1878                         {
1879                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1880                         }
1881                 }
1882         }
1883
1884         /** send all users and their oper state/modes */
1885         void SendUsers(TreeServer* Current)
1886         {
1887                 char data[MAXBUF];
1888                 std::deque<std::string> list;
1889                 int iterations = 0;
1890                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
1891                 {
1892                         if (u->second->registered == REG_ALL)
1893                         {
1894                                 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);
1895                                 this->WriteLine(data);
1896                                 if (*u->second->oper)
1897                                 {
1898                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1899                                 }
1900                                 if (*u->second->awaymsg)
1901                                 {
1902                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1903                                 }
1904                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1905                                 list.clear();
1906                                 u->second->GetExtList(list);
1907                                 for (unsigned int j = 0; j < list.size(); j++)
1908                                 {
1909                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1910                                 }
1911                         }
1912                 }
1913         }
1914
1915         /** This function is called when we want to send a netburst to a local
1916          * server. There is a set order we must do this, because for example
1917          * users require their servers to exist, and channels require their
1918          * users to exist. You get the idea.
1919          */
1920         void DoBurst(TreeServer* s)
1921         {
1922                 std::string burst = "BURST "+ConvToStr(time(NULL));
1923                 std::string endburst = "ENDBURST";
1924                 // Because by the end of the netburst, it  could be gone!
1925                 std::string name = s->GetName();
1926                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
1927                 this->WriteLine(burst);
1928                 /* send our version string */
1929                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
1930                 /* Send server tree */
1931                 this->SendServers(TreeRoot,s,1);
1932                 /* Send users and their oper status */
1933                 this->SendUsers(s);
1934                 /* Send everything else (channel modes, xlines etc) */
1935                 this->SendChannelModes(s);
1936                 this->SendXLines(s);
1937                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1938                 this->WriteLine(endburst);
1939                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
1940         }
1941
1942         /** This function is called when we receive data from a remote
1943          * server. We buffer the data in a std::string (it doesnt stay
1944          * there for long), reading using InspSocket::Read() which can
1945          * read up to 16 kilobytes in one operation.
1946          *
1947          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1948          * THE SOCKET OBJECT FOR US.
1949          */
1950         virtual bool OnDataReady()
1951         {
1952                 char* data = this->Read();
1953                 /* Check that the data read is a valid pointer and it has some content */
1954                 if (data && *data)
1955                 {
1956                         this->in_buffer.append(data);
1957                         /* While there is at least one new line in the buffer,
1958                          * do something useful (we hope!) with it.
1959                          */
1960                         while (in_buffer.find("\n") != std::string::npos)
1961                         {
1962                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1963                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1964                                 if (ret.find("\r") != std::string::npos)
1965                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1966                                 /* Process this one, abort if it
1967                                  * didnt return true.
1968                                  */
1969                                 if (this->ctx_in)
1970                                 {
1971                                         char out[1024];
1972                                         char result[1024];
1973                                         memset(result,0,1024);
1974                                         memset(out,0,1024);
1975                                         Instance->Log(DEBUG,"Original string '%s'",ret.c_str());
1976                                         /* ERROR + CAPAB is still allowed unencryped */
1977                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1978                                         {
1979                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1980                                                 if ((nbytes > 0) && (nbytes < 1024))
1981                                                 {
1982                                                         Instance->Log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1983                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1984                                                         for (int t = 0; t < nbytes; t++)
1985                                                                 if (result[t] == '\7') result[t] = 0;
1986                                                         ret = result;
1987                                                 }
1988                                         }
1989                                 }
1990                                 if (!this->ProcessLine(ret))
1991                                 {
1992                                         Instance->Log(DEBUG,"ProcessLine says no!");
1993                                         return false;
1994                                 }
1995                         }
1996                         return true;
1997                 }
1998                 /* EAGAIN returns an empty but non-NULL string, so this
1999                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2000                  */
2001                 return (data && !*data);
2002         }
2003
2004         int WriteLine(std::string line)
2005         {
2006                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2007                 if (this->ctx_out)
2008                 {
2009                         char result[10240];
2010                         char result64[10240];
2011                         if (this->keylength)
2012                         {
2013                                 // pad it to the key length
2014                                 int n = this->keylength - (line.length() % this->keylength);
2015                                 if (n)
2016                                 {
2017                                         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);
2018                                         line.append(n,'\7');
2019                                 }
2020                         }
2021                         unsigned int ll = line.length();
2022                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2023                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2024                         line = result64;
2025                         //int from64tobits(char *out, const char *in, int maxlen);
2026                 }
2027                 return this->Write(line + "\r\n");
2028         }
2029
2030         /* Handle ERROR command */
2031         bool Error(std::deque<std::string> &params)
2032         {
2033                 if (params.size() < 1)
2034                         return false;
2035                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2036                 /* we will return false to cause the socket to close. */
2037                 return false;
2038         }
2039
2040         /** remote MOTD. leet, huh? */
2041         bool Motd(std::string prefix, std::deque<std::string> &params)
2042         {
2043                 if (params.size() > 0)
2044                 {
2045                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2046                         {
2047                                 /* It's for our server */
2048                                 string_list results;
2049                                 userrec* source = this->Instance->FindNick(prefix);
2050
2051                                 if (source)
2052                                 {
2053                                         std::deque<std::string> par;
2054                                         par.push_back(prefix);
2055                                         par.push_back("");
2056
2057                                         if (!Instance->Config->MOTD.size())
2058                                         {
2059                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2060                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2061                                                 return true;
2062                                         }
2063
2064                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2065                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2066
2067                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2068                                         {
2069                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2070                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2071                                         }
2072
2073                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2074                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2075                                 }
2076                         }
2077                         else
2078                         {
2079                                 /* Pass it on */
2080                                 userrec* source = this->Instance->FindNick(prefix);
2081                                 if (source)
2082                                         DoOneToOne(prefix, "MOTD", params, params[0]);
2083                         }
2084                 }
2085                 return true;
2086         }
2087
2088         /** remote ADMIN. leet, huh? */
2089         bool Admin(std::string prefix, std::deque<std::string> &params)
2090         {
2091                 if (params.size() > 0)
2092                 {
2093                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2094                         {
2095                                 /* It's for our server */
2096                                 string_list results;
2097                                 userrec* source = this->Instance->FindNick(prefix);
2098
2099                                 if (source)
2100                                 {
2101                                         std::deque<std::string> par;
2102                                         par.push_back(prefix);
2103                                         par.push_back("");
2104
2105                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2106                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2107
2108                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2109                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2110
2111                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2112                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2113
2114                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2115                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2116                                 }
2117                         }
2118                         else
2119                         {
2120                                 /* Pass it on */
2121                                 userrec* source = this->Instance->FindNick(prefix);
2122                                 if (source)
2123                                         DoOneToOne(prefix, "ADMIN", params, params[0]);
2124                         }
2125                 }
2126                 return true;
2127         }
2128
2129         bool Stats(std::string prefix, std::deque<std::string> &params)
2130         {
2131                 /* Get the reply to a STATS query if it matches this servername,
2132                  * and send it back as a load of PUSH queries
2133                  */
2134                 if (params.size() > 1)
2135                 {
2136                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2137                         {
2138                                 /* It's for our server */
2139                                 string_list results;
2140                                 userrec* source = this->Instance->FindNick(prefix);
2141                                 if (source)
2142                                 {
2143                                         std::deque<std::string> par;
2144                                         par.push_back(prefix);
2145                                         par.push_back("");
2146                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2147                                         for (size_t i = 0; i < results.size(); i++)
2148                                         {
2149                                                 par[1] = "::" + results[i];
2150                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2151                                         }
2152                                 }
2153                         }
2154                         else
2155                         {
2156                                 /* Pass it on */
2157                                 userrec* source = this->Instance->FindNick(prefix);
2158                                 if (source)
2159                                         DoOneToOne(prefix, "STATS", params, params[1]);
2160                         }
2161                 }
2162                 return true;
2163         }
2164
2165
2166         /** Because the core won't let users or even SERVERS set +o,
2167          * we use the OPERTYPE command to do this.
2168          */
2169         bool OperType(std::string prefix, std::deque<std::string> &params)
2170         {
2171                 if (params.size() != 1)
2172                 {
2173                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2174                         return true;
2175                 }
2176                 std::string opertype = params[0];
2177                 userrec* u = this->Instance->FindNick(prefix);
2178                 if (u)
2179                 {
2180                         u->modes[UM_OPERATOR] = 1;
2181                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2182                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2183                 }
2184                 return true;
2185         }
2186
2187         /** Because Andy insists that services-compatible servers must
2188          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2189          */
2190         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2191         {
2192                 if (params.size() < 3)
2193                         return true;
2194
2195                 userrec* u = this->Instance->FindNick(params[0]);
2196
2197                 if (u)
2198                 {
2199                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2200                         if (IS_LOCAL(u))
2201                         {
2202                                 std::deque<std::string> par;
2203                                 par.push_back(params[1]);
2204                                 /* This is not required as one is sent in OnUserPostNick below
2205                                  */
2206                                 //DoOneToMany(u->nick,"NICK",par);
2207                                 if (!u->ForceNickChange(params[1].c_str()))
2208                                 {
2209                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2210                                         return true;
2211                                 }
2212                                 u->age = atoi(params[2].c_str());
2213                         }
2214                 }
2215                 return true;
2216         }
2217
2218         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2219         {
2220                 if (params.size() < 2)
2221                         return true;
2222
2223                 userrec* u = this->Instance->FindNick(params[0]);
2224
2225                 if (u)
2226                 {
2227                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2228                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2229                 }
2230                 return true;
2231         }
2232
2233         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2234         {
2235                 if (params.size() < 1)
2236                         return false;
2237
2238                 std::string servermask = params[0];
2239
2240                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2241                 {
2242                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2243                         this->Instance->RehashServer();
2244                         ReadConfiguration(false);
2245                 }
2246                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2247                 return true;
2248         }
2249
2250         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2251         {
2252                 if (params.size() != 2)
2253                         return true;
2254
2255                 std::string nick = params[0];
2256                 userrec* u = this->Instance->FindNick(prefix);
2257                 userrec* who = this->Instance->FindNick(nick);
2258
2259                 if (who)
2260                 {
2261                         /* Prepend kill source, if we don't have one */
2262                         std::string sourceserv = prefix;
2263                         if (u)
2264                         {
2265                                 sourceserv = u->server;
2266                         }
2267                         if (*(params[1].c_str()) != '[')
2268                         {
2269                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2270                         }
2271                         std::string reason = params[1];
2272                         params[1] = ":" + params[1];
2273                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2274                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2275                         userrec::QuitUser(this->Instance,who,reason);
2276                 }
2277                 return true;
2278         }
2279
2280         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2281         {
2282                 if (params.size() < 1)
2283                         return true;
2284
2285                 if (params.size() == 1)
2286                 {
2287                         TreeServer* ServerSource = FindServer(prefix);
2288                         if (ServerSource)
2289                         {
2290                                 ServerSource->SetPingFlag();
2291                         }
2292                 }
2293                 else
2294                 {
2295                         std::string forwardto = params[1];
2296                         if (forwardto == this->Instance->Config->ServerName)
2297                         {
2298                                 /*
2299                                  * this is a PONG for us
2300                                  * if the prefix is a user, check theyre local, and if they are,
2301                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2302                                  * Services might want to send these s->s, but we dont need to yet.
2303                                  */
2304                                 userrec* u = this->Instance->FindNick(prefix);
2305
2306                                 if (u)
2307                                 {
2308                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2309                                 }
2310                         }
2311                         else
2312                         {
2313                                 // not for us, pass it on :)
2314                                 DoOneToOne(prefix,"PONG",params,forwardto);
2315                         }
2316                 }
2317
2318                 return true;
2319         }
2320
2321         bool MetaData(std::string prefix, std::deque<std::string> &params)
2322         {
2323                 if (params.size() < 3)
2324                         return true;
2325
2326                 TreeServer* ServerSource = FindServer(prefix);
2327
2328                 if (ServerSource)
2329                 {
2330                         if (params[0] == "*")
2331                         {
2332                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2333                         }
2334                         else if (*(params[0].c_str()) == '#')
2335                         {
2336                                 chanrec* c = this->Instance->FindChan(params[0]);
2337                                 if (c)
2338                                 {
2339                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2340                                 }
2341                         }
2342                         else if (*(params[0].c_str()) != '#')
2343                         {
2344                                 userrec* u = this->Instance->FindNick(params[0]);
2345                                 if (u)
2346                                 {
2347                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2348                                 }
2349                         }
2350                 }
2351
2352                 params[2] = ":" + params[2];
2353                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2354                 return true;
2355         }
2356
2357         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2358         {
2359                 if (params.size() < 1)
2360                         return true;
2361
2362                 TreeServer* ServerSource = FindServer(prefix);
2363
2364                 if (ServerSource)
2365                 {
2366                         ServerSource->SetVersion(params[0]);
2367                 }
2368                 params[0] = ":" + params[0];
2369                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2370                 return true;
2371         }
2372
2373         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2374         {
2375                 if (params.size() < 1)
2376                         return true;
2377
2378                 userrec* u = this->Instance->FindNick(prefix);
2379
2380                 if (u)
2381                 {
2382                         u->ChangeDisplayedHost(params[0].c_str());
2383                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2384                 }
2385                 return true;
2386         }
2387
2388         bool AddLine(std::string prefix, std::deque<std::string> &params)
2389         {
2390                 if (params.size() < 6)
2391                         return true;
2392
2393                 bool propogate = false;
2394
2395                 switch (*(params[0].c_str()))
2396                 {
2397                         case 'Z':
2398                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2399                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2400                         break;
2401                         case 'Q':
2402                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2403                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2404                         break;
2405                         case 'E':
2406                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2407                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2408                         break;
2409                         case 'G':
2410                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2411                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2412                         break;
2413                         case 'K':
2414                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2415                         break;
2416                         default:
2417                                 /* Just in case... */
2418                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2419                                 propogate = false;
2420                         break;
2421                 }
2422
2423                 /* Send it on its way */
2424                 if (propogate)
2425                 {
2426                         if (atoi(params[4].c_str()))
2427                         {
2428                                 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());
2429                         }
2430                         else
2431                         {
2432                                 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());
2433                         }
2434                         params[5] = ":" + params[5];
2435                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2436                 }
2437                 if (!this->bursting)
2438                 {
2439                         Instance->Log(DEBUG,"Applying lines...");
2440                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2441                 }
2442                 return true;
2443         }
2444
2445         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2446         {
2447                 if (params.size() < 1)
2448                         return true;
2449
2450                 userrec* u = this->Instance->FindNick(prefix);
2451
2452                 if (u)
2453                 {
2454                         u->ChangeName(params[0].c_str());
2455                         params[0] = ":" + params[0];
2456                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2457                 }
2458                 return true;
2459         }
2460
2461         bool Whois(std::string prefix, std::deque<std::string> &params)
2462         {
2463                 if (params.size() < 1)
2464                         return true;
2465
2466                 Instance->Log(DEBUG,"In IDLE command");
2467                 userrec* u = this->Instance->FindNick(prefix);
2468
2469                 if (u)
2470                 {
2471                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2472                         // an incoming request
2473                         if (params.size() == 1)
2474                         {
2475                                 userrec* x = this->Instance->FindNick(params[0]);
2476                                 if ((x) && (IS_LOCAL(x)))
2477                                 {
2478                                         userrec* x = this->Instance->FindNick(params[0]);
2479                                         char signon[MAXBUF];
2480                                         char idle[MAXBUF];
2481
2482                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2483                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2484                                         std::deque<std::string> par;
2485                                         par.push_back(prefix);
2486                                         par.push_back(signon);
2487                                         par.push_back(idle);
2488                                         // ours, we're done, pass it BACK
2489                                         DoOneToOne(params[0],"IDLE",par,u->server);
2490                                 }
2491                                 else
2492                                 {
2493                                         // not ours pass it on
2494                                         DoOneToOne(prefix,"IDLE",params,x->server);
2495                                 }
2496                         }
2497                         else if (params.size() == 3)
2498                         {
2499                                 std::string who_did_the_whois = params[0];
2500                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2501                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2502                                 {
2503                                         // an incoming reply to a whois we sent out
2504                                         std::string nick_whoised = prefix;
2505                                         unsigned long signon = atoi(params[1].c_str());
2506                                         unsigned long idle = atoi(params[2].c_str());
2507                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2508                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2509                                 }
2510                                 else
2511                                 {
2512                                         // not ours, pass it on
2513                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2514                                 }
2515                         }
2516                 }
2517                 return true;
2518         }
2519
2520         bool Push(std::string prefix, std::deque<std::string> &params)
2521         {
2522                 if (params.size() < 2)
2523                         return true;
2524
2525                 userrec* u = this->Instance->FindNick(params[0]);
2526
2527                 if (!u)
2528                         return true;
2529
2530                 if (IS_LOCAL(u))
2531                 {
2532                         u->Write(params[1]);
2533                 }
2534                 else
2535                 {
2536                         // continue the raw onwards
2537                         params[1] = ":" + params[1];
2538                         DoOneToOne(prefix,"PUSH",params,u->server);
2539                 }
2540                 return true;
2541         }
2542
2543         bool Time(std::string prefix, std::deque<std::string> &params)
2544         {
2545                 // :source.server TIME remote.server sendernick
2546                 // :remote.server TIME source.server sendernick TS
2547                 if (params.size() == 2)
2548                 {
2549                         // someone querying our time?
2550                         if (this->Instance->Config->ServerName == params[0])
2551                         {
2552                                 userrec* u = this->Instance->FindNick(params[1]);
2553                                 if (u)
2554                                 {
2555                                         char curtime[256];
2556                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2557                                         params.push_back(curtime);
2558                                         params[0] = prefix;
2559                                         DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2560                                 }
2561                         }
2562                         else
2563                         {
2564                                 // not us, pass it on
2565                                 userrec* u = this->Instance->FindNick(params[1]);
2566                                 if (u)
2567                                         DoOneToOne(prefix,"TIME",params,params[0]);
2568                         }
2569                 }
2570                 else if (params.size() == 3)
2571                 {
2572                         // a response to a previous TIME
2573                         userrec* u = this->Instance->FindNick(params[1]);
2574                         if ((u) && (IS_LOCAL(u)))
2575                         {
2576                         time_t rawtime = atol(params[2].c_str());
2577                         struct tm * timeinfo;
2578                         timeinfo = localtime(&rawtime);
2579                                 char tms[26];
2580                                 snprintf(tms,26,"%s",asctime(timeinfo));
2581                                 tms[24] = 0;
2582                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2583                         }
2584                         else
2585                         {
2586                                 if (u)
2587                                         DoOneToOne(prefix,"TIME",params,u->server);
2588                         }
2589                 }
2590                 return true;
2591         }
2592
2593         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2594         {
2595                 if (params.size() < 1)
2596                         return true;
2597
2598                 if (params.size() == 1)
2599                 {
2600                         std::string stufftobounce = params[0];
2601                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2602                         return true;
2603                 }
2604                 else
2605                 {
2606                         std::string forwardto = params[1];
2607                         if (forwardto == this->Instance->Config->ServerName)
2608                         {
2609                                 // this is a ping for us, send back PONG to the requesting server
2610                                 params[1] = params[0];
2611                                 params[0] = forwardto;
2612                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2613                         }
2614                         else
2615                         {
2616                                 // not for us, pass it on :)
2617                                 DoOneToOne(prefix,"PING",params,forwardto);
2618                         }
2619                         return true;
2620                 }
2621         }
2622
2623         bool RemoveStatus(std::string prefix, std::deque<std::string> &params)
2624         {
2625                 if (params.size() < 1)
2626                         return true;
2627
2628                 chanrec* c = Instance->FindChan(params[0]);
2629
2630                 if (c)
2631                 {
2632                         CUList *ulist = c->GetUsers();
2633                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2634                         {
2635                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2636                                 if (modesequence.length())
2637                                 {
2638                                         modesequence = "-" + modesequence;
2639
2640                                         std::deque<std::string> items;
2641                                         const char* y[127];
2642                                         unsigned int z = 0;
2643                                         std::string x = "*";
2644                                         irc::spacesepstream sep(modesequence);
2645
2646                                         while ((x = sep.GetToken()) != "")
2647                                         {
2648                                                 if (!z)
2649                                                 {
2650                                                         y[z++] = c->name;
2651                                                         items.push_back(c->name);
2652                                                         items.push_back(ConvToStr(c->age));
2653                                                 }
2654                                                 items.push_back(x);
2655                                                 y[z++] = (items.end() - 1)->c_str();
2656                                         }
2657
2658                                         DoOneToMany(Instance->Config->ServerName, "FMODE", items);
2659                                         userrec* n = new userrec(Instance);
2660                                         n->SetFd(FD_MAGIC_NUMBER);
2661                                         Instance->SendMode(y,z,n);
2662                                         delete n;
2663                                 }
2664                         }
2665                 }
2666                 return true;
2667         }
2668
2669         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2670         {
2671                 if (params.size() < 4)
2672                         return false;
2673
2674                 std::string servername = params[0];
2675                 std::string password = params[1];
2676                 // hopcount is not used for a remote server, we calculate this ourselves
2677                 std::string description = params[3];
2678                 TreeServer* ParentOfThis = FindServer(prefix);
2679
2680                 if (!ParentOfThis)
2681                 {
2682                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2683                         return false;
2684                 }
2685                 TreeServer* CheckDupe = FindServer(servername);
2686                 if (CheckDupe)
2687                 {
2688                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2689                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2690                         return false;
2691                 }
2692                 TreeServer* Node = new TreeServer(this->Instance,servername,description,ParentOfThis,NULL);
2693                 ParentOfThis->AddChild(Node);
2694                 params[3] = ":" + params[3];
2695                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2696                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2697                 return true;
2698         }
2699
2700         bool Outbound_Reply_Server(std::deque<std::string> &params)
2701         {
2702                 if (params.size() < 4)
2703                         return false;
2704
2705                 irc::string servername = params[0].c_str();
2706                 std::string sname = params[0];
2707                 std::string password = params[1];
2708                 int hops = atoi(params[2].c_str());
2709
2710                 if (hops)
2711                 {
2712                         this->WriteLine("ERROR :Server too far away for authentication");
2713                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2714                         return false;
2715                 }
2716                 std::string description = params[3];
2717                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2718                 {
2719                         if ((x->Name == servername) && (x->RecvPass == password))
2720                         {
2721                                 TreeServer* CheckDupe = FindServer(sname);
2722                                 if (CheckDupe)
2723                                 {
2724                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2725                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2726                                         return false;
2727                                 }
2728                                 // Begin the sync here. this kickstarts the
2729                                 // other side, waiting in WAIT_AUTH_2 state,
2730                                 // into starting their burst, as it shows
2731                                 // that we're happy.
2732                                 this->LinkState = CONNECTED;
2733                                 // we should add the details of this server now
2734                                 // to the servers tree, as a child of the root
2735                                 // node.
2736                                 TreeServer* Node = new TreeServer(this->Instance,sname,description,TreeRoot,this);
2737                                 TreeRoot->AddChild(Node);
2738                                 params[3] = ":" + params[3];
2739                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2740                                 this->bursting = true;
2741                                 this->DoBurst(Node);
2742                                 return true;
2743                         }
2744                 }
2745                 this->WriteLine("ERROR :Invalid credentials");
2746                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2747                 return false;
2748         }
2749
2750         bool Inbound_Server(std::deque<std::string> &params)
2751         {
2752                 if (params.size() < 4)
2753                         return false;
2754
2755                 irc::string servername = params[0].c_str();
2756                 std::string sname = params[0];
2757                 std::string password = params[1];
2758                 int hops = atoi(params[2].c_str());
2759
2760                 if (hops)
2761                 {
2762                         this->WriteLine("ERROR :Server too far away for authentication");
2763                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2764                         return false;
2765                 }
2766                 std::string description = params[3];
2767                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2768                 {
2769                         if ((x->Name == servername) && (x->RecvPass == password))
2770                         {
2771                                 TreeServer* CheckDupe = FindServer(sname);
2772                                 if (CheckDupe)
2773                                 {
2774                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2775                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2776                                         return false;
2777                                 }
2778                                 /* If the config says this link is encrypted, but the remote side
2779                                  * hasnt bothered to send the AES command before SERVER, then we
2780                                  * boot them off as we MUST have this connection encrypted.
2781                                  */
2782                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2783                                 {
2784                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2785                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2786                                         return false;
2787                                 }
2788                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2789                                 this->InboundServerName = sname;
2790                                 this->InboundDescription = description;
2791                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2792                                 // along with the sendpass from this block.
2793                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2794                                 // move to the next state, we are now waiting for THEM.
2795                                 this->LinkState = WAIT_AUTH_2;
2796                                 return true;
2797                         }
2798                 }
2799                 this->WriteLine("ERROR :Invalid credentials");
2800                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2801                 return false;
2802         }
2803
2804         void Split(std::string line, std::deque<std::string> &n)
2805         {
2806                 n.clear();
2807                 irc::tokenstream tokens(line);
2808                 std::string param;
2809                 while ((param = tokens.GetToken()) != "")
2810                         n.push_back(param);
2811                 return;
2812         }
2813
2814         bool ProcessLine(std::string line)
2815         {
2816                 std::deque<std::string> params;
2817                 irc::string command;
2818                 std::string prefix;
2819
2820                 if (line.empty())
2821                         return true;
2822
2823                 line = line.substr(0, line.find_first_of("\r\n"));
2824
2825                 Instance->Log(DEBUG,"IN: %s", line.c_str());
2826
2827                 this->Split(line.c_str(),params);
2828
2829                 if ((params[0][0] == ':') && (params.size() > 1))
2830                 {
2831                         prefix = params[0].substr(1);
2832                         params.pop_front();
2833                 }
2834
2835                 command = params[0].c_str();
2836                 params.pop_front();
2837
2838                 if ((!this->ctx_in) && (command == "AES"))
2839                 {
2840                         std::string sserv = params[0];
2841                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2842                         {
2843                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2844                                 {
2845                                         this->InitAES(x->EncryptionKey,sserv);
2846                                 }
2847                         }
2848
2849                         return true;
2850                 }
2851                 else if ((this->ctx_in) && (command == "AES"))
2852                 {
2853                         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());
2854                 }
2855
2856                 switch (this->LinkState)
2857                 {
2858                         TreeServer* Node;
2859
2860                         case WAIT_AUTH_1:
2861                                 // Waiting for SERVER command from remote server. Server initiating
2862                                 // the connection sends the first SERVER command, listening server
2863                                 // replies with theirs if its happy, then if the initiator is happy,
2864                                 // it starts to send its net sync, which starts the merge, otherwise
2865                                 // it sends an ERROR.
2866                                 if (command == "PASS")
2867                                 {
2868                                         /* Silently ignored */
2869                                 }
2870                                 else if (command == "SERVER")
2871                                 {
2872                                         return this->Inbound_Server(params);
2873                                 }
2874                                 else if (command == "ERROR")
2875                                 {
2876                                         return this->Error(params);
2877                                 }
2878                                 else if (command == "USER")
2879                                 {
2880                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2881                                         return false;
2882                                 }
2883                                 else if (command == "CAPAB")
2884                                 {
2885                                         return this->Capab(params);
2886                                 }
2887                                 else if ((command == "U") || (command == "S"))
2888                                 {
2889                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2890                                         return false;
2891                                 }
2892                                 else
2893                                 {
2894                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2895                                         return false;
2896                                 }
2897                         break;
2898                         case WAIT_AUTH_2:
2899                                 // Waiting for start of other side's netmerge to say they liked our
2900                                 // password.
2901                                 if (command == "SERVER")
2902                                 {
2903                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2904                                         // silently ignore.
2905                                         return true;
2906                                 }
2907                                 else if ((command == "U") || (command == "S"))
2908                                 {
2909                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2910                                         return false;
2911                                 }
2912                                 else if (command == "BURST")
2913                                 {
2914                                         if (params.size())
2915                                         {
2916                                                 /* If a time stamp is provided, try and check syncronization */
2917                                                 time_t THEM = atoi(params[0].c_str());
2918                                                 long delta = THEM-time(NULL);
2919                                                 if ((delta < -600) || (delta > 600))
2920                                                 {
2921                                                         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));
2922                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2923                                                         return false;
2924                                                 }
2925                                                 else if ((delta < -60) || (delta > 60))
2926                                                 {
2927                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2928                                                 }
2929                                         }
2930                                         this->LinkState = CONNECTED;
2931                                         Node = new TreeServer(this->Instance,InboundServerName,InboundDescription,TreeRoot,this);
2932                                         TreeRoot->AddChild(Node);
2933                                         params.clear();
2934                                         params.push_back(InboundServerName);
2935                                         params.push_back("*");
2936                                         params.push_back("1");
2937                                         params.push_back(":"+InboundDescription);
2938                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2939                                         this->bursting = true;
2940                                         this->DoBurst(Node);
2941                                 }
2942                                 else if (command == "ERROR")
2943                                 {
2944                                         return this->Error(params);
2945                                 }
2946                                 else if (command == "CAPAB")
2947                                 {
2948                                         return this->Capab(params);
2949                                 }
2950
2951                         break;
2952                         case LISTENER:
2953                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2954                                 return false;
2955                         break;
2956                         case CONNECTING:
2957                                 if (command == "SERVER")
2958                                 {
2959                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2960                                         // has just sent us their credentials. If we get this far, theyre
2961                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2962                                         // if we're happy with this, we should send our netburst which
2963                                         // kickstarts the merge.
2964                                         return this->Outbound_Reply_Server(params);
2965                                 }
2966                                 else if (command == "ERROR")
2967                                 {
2968                                         return this->Error(params);
2969                                 }
2970                         break;
2971                         case CONNECTED:
2972                                 // This is the 'authenticated' state, when all passwords
2973                                 // have been exchanged and anything past this point is taken
2974                                 // as gospel.
2975
2976                                 if (prefix != "")
2977                                 {
2978                                         std::string direction = prefix;
2979                                         userrec* t = this->Instance->FindNick(prefix);
2980                                         if (t)
2981                                         {
2982                                                 direction = t->server;
2983                                         }
2984                                         TreeServer* route_back_again = BestRouteTo(direction);
2985                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2986                                         {
2987                                                 if (route_back_again)
2988                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2989                                                 return true;
2990                                         }
2991
2992                                         /* Fix by brain:
2993                                          * When there is activity on the socket, reset the ping counter so
2994                                          * that we're not wasting bandwidth pinging an active server.
2995                                          */
2996                                         route_back_again->SetNextPingTime(time(NULL) + 60);
2997                                         route_back_again->SetPingFlag();
2998                                 }
2999
3000                                 if (command == "SVSMODE")
3001                                 {
3002                                         /* Services expects us to implement
3003                                          * SVSMODE. In inspircd its the same as
3004                                          * MODE anyway.
3005                                          */
3006                                         command = "MODE";
3007                                 }
3008                                 std::string target = "";
3009                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3010                                  * working with std::string here.
3011                                  */
3012                                 if ((command == "NICK") && (params.size() > 1))
3013                                 {
3014                                         return this->IntroduceClient(prefix,params);
3015                                 }
3016                                 else if (command == "FJOIN")
3017                                 {
3018                                         return this->ForceJoin(prefix,params);
3019                                 }
3020                                 else if (command == "STATS")
3021                                 {
3022                                         return this->Stats(prefix, params);
3023                                 }
3024                                 else if (command == "MOTD")
3025                                 {
3026                                         return this->Motd(prefix, params);
3027                                 }
3028                                 else if (command == "ADMIN")
3029                                 {
3030                                         return this->Admin(prefix, params);
3031                                 }
3032                                 else if (command == "SERVER")
3033                                 {
3034                                         return this->RemoteServer(prefix,params);
3035                                 }
3036                                 else if (command == "ERROR")
3037                                 {
3038                                         return this->Error(params);
3039                                 }
3040                                 else if (command == "OPERTYPE")
3041                                 {
3042                                         return this->OperType(prefix,params);
3043                                 }
3044                                 else if (command == "FMODE")
3045                                 {
3046                                         return this->ForceMode(prefix,params);
3047                                 }
3048                                 else if (command == "KILL")
3049                                 {
3050                                         return this->RemoteKill(prefix,params);
3051                                 }
3052                                 else if (command == "FTOPIC")
3053                                 {
3054                                         return this->ForceTopic(prefix,params);
3055                                 }
3056                                 else if (command == "REHASH")
3057                                 {
3058                                         return this->RemoteRehash(prefix,params);
3059                                 }
3060                                 else if (command == "METADATA")
3061                                 {
3062                                         return this->MetaData(prefix,params);
3063                                 }
3064                                 else if (command == "REMSTATUS")
3065                                 {
3066                                         return this->RemoveStatus(prefix,params);
3067                                 }
3068                                 else if (command == "PING")
3069                                 {
3070                                         /*
3071                                          * We just got a ping from a server that's bursting.
3072                                          * This can't be right, so set them to not bursting, and
3073                                          * apply their lines.
3074                                          */
3075                                         if (this->bursting)
3076                                         {
3077                                                 this->bursting = false;
3078                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3079                                         }
3080                                         if (prefix == "")
3081                                         {
3082                                                 prefix = this->GetName();
3083                                         }
3084                                         return this->LocalPing(prefix,params);
3085                                 }
3086                                 else if (command == "PONG")
3087                                 {
3088                                         /*
3089                                          * We just got a pong from a server that's bursting.
3090                                          * This can't be right, so set them to not bursting, and
3091                                          * apply their lines.
3092                                          */
3093                                         if (this->bursting)
3094                                         {
3095                                                 this->bursting = false;
3096                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3097                                         }
3098                                         if (prefix == "")
3099                                         {
3100                                                 prefix = this->GetName();
3101                                         }
3102                                         return this->LocalPong(prefix,params);
3103                                 }
3104                                 else if (command == "VERSION")
3105                                 {
3106                                         return this->ServerVersion(prefix,params);
3107                                 }
3108                                 else if (command == "FHOST")
3109                                 {
3110                                         return this->ChangeHost(prefix,params);
3111                                 }
3112                                 else if (command == "FNAME")
3113                                 {
3114                                         return this->ChangeName(prefix,params);
3115                                 }
3116                                 else if (command == "ADDLINE")
3117                                 {
3118                                         return this->AddLine(prefix,params);
3119                                 }
3120                                 else if (command == "SVSNICK")
3121                                 {
3122                                         if (prefix == "")
3123                                         {
3124                                                 prefix = this->GetName();
3125                                         }
3126                                         return this->ForceNick(prefix,params);
3127                                 }
3128                                 else if (command == "IDLE")
3129                                 {
3130                                         return this->Whois(prefix,params);
3131                                 }
3132                                 else if (command == "PUSH")
3133                                 {
3134                                         return this->Push(prefix,params);
3135                                 }
3136                                 else if (command == "TIME")
3137                                 {
3138                                         return this->Time(prefix,params);
3139                                 }
3140                                 else if ((command == "KICK") && (IsServer(prefix)))
3141                                 {
3142                                         std::string sourceserv = this->myhost;
3143                                         if (params.size() == 3)
3144                                         {
3145                                                 userrec* user = this->Instance->FindNick(params[1]);
3146                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3147                                                 if (user && chan)
3148                                                 {
3149                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3150                                                                 /* Yikes, the channels gone! */
3151                                                                 delete chan;
3152                                                 }
3153                                         }
3154                                         if (this->InboundServerName != "")
3155                                         {
3156                                                 sourceserv = this->InboundServerName;
3157                                         }
3158                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3159                                 }
3160                                 else if (command == "SVSJOIN")
3161                                 {
3162                                         if (prefix == "")
3163                                         {
3164                                                 prefix = this->GetName();
3165                                         }
3166                                         return this->ServiceJoin(prefix,params);
3167                                 }
3168                                 else if (command == "SQUIT")
3169                                 {
3170                                         if (params.size() == 2)
3171                                         {
3172                                                 this->Squit(FindServer(params[0]),params[1]);
3173                                         }
3174                                         return true;
3175                                 }
3176                                 else if (command == "ENDBURST")
3177                                 {
3178                                         this->bursting = false;
3179                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3180                                         std::string sourceserv = this->myhost;
3181                                         if (this->InboundServerName != "")
3182                                         {
3183                                                 sourceserv = this->InboundServerName;
3184                                         }
3185                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3186                                         return true;
3187                                 }
3188                                 else
3189                                 {
3190                                         // not a special inter-server command.
3191                                         // Emulate the actual user doing the command,
3192                                         // this saves us having a huge ugly parser.
3193                                         userrec* who = this->Instance->FindNick(prefix);
3194                                         std::string sourceserv = this->myhost;
3195                                         if (this->InboundServerName != "")
3196                                         {
3197                                                 sourceserv = this->InboundServerName;
3198                                         }
3199                                         if (who)
3200                                         {
3201                                                 if ((command == "NICK") && (params.size() > 0))
3202                                                 {
3203                                                         /* On nick messages, check that the nick doesnt
3204                                                          * already exist here. If it does, kill their copy,
3205                                                          * and our copy.
3206                                                          */
3207                                                         userrec* x = this->Instance->FindNick(params[0]);
3208                                                         if ((x) && (x != who))
3209                                                         {
3210                                                                 std::deque<std::string> p;
3211                                                                 p.push_back(params[0]);
3212                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3213                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3214                                                                 p.clear();
3215                                                                 p.push_back(prefix);
3216                                                                 p.push_back("Nickname collision");
3217                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3218                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3219                                                                 userrec* y = this->Instance->FindNick(prefix);
3220                                                                 if (y)
3221                                                                 {
3222                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3223                                                                 }
3224                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3225                                                         }
3226                                                 }
3227                                                 // its a user
3228                                                 target = who->server;
3229                                                 const char* strparams[127];
3230                                                 for (unsigned int q = 0; q < params.size(); q++)
3231                                                 {
3232                                                         strparams[q] = params[q].c_str();
3233                                                 }
3234                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3235                                                 {
3236                                                         case CMD_INVALID:
3237                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3238                                                                 return false;
3239                                                         break;
3240                                                         case CMD_FAILURE:
3241                                                                 return true;
3242                                                         break;
3243                                                         default:
3244                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3245                                                         break;
3246                                                 }
3247                                         }
3248                                         else
3249                                         {
3250                                                 // its not a user. Its either a server, or somethings screwed up.
3251                                                 if (IsServer(prefix))
3252                                                 {
3253                                                         target = this->Instance->Config->ServerName;
3254                                                 }
3255                                                 else
3256                                                 {
3257                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3258                                                         return true;
3259                                                 }
3260                                         }
3261                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3262
3263                                 }
3264                                 return true;
3265                         break;
3266                 }
3267                 return true;
3268         }
3269
3270         virtual std::string GetName()
3271         {
3272                 std::string sourceserv = this->myhost;
3273                 if (this->InboundServerName != "")
3274                 {
3275                         sourceserv = this->InboundServerName;
3276                 }
3277                 return sourceserv;
3278         }
3279
3280         virtual void OnTimeout()
3281         {
3282                 if (this->LinkState == CONNECTING)
3283                 {
3284                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3285                         Link* MyLink = FindLink(myhost);
3286                         if (MyLink)
3287                                 DoFailOver(MyLink);
3288                 }
3289         }
3290
3291         virtual void OnClose()
3292         {
3293                 // Connection closed.
3294                 // If the connection is fully up (state CONNECTED)
3295                 // then propogate a netsplit to all peers.
3296                 std::string quitserver = this->myhost;
3297                 if (this->InboundServerName != "")
3298                 {
3299                         quitserver = this->InboundServerName;
3300                 }
3301                 TreeServer* s = FindServer(quitserver);
3302                 if (s)
3303                 {
3304                         Squit(s,"Remote host closed the connection");
3305                 }
3306                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3307         }
3308
3309         virtual int OnIncomingConnection(int newsock, char* ip)
3310         {
3311                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3312                  * or discovering if this port is the server port, we don't allow connections from any
3313                  * IPs for which we don't have a link block.
3314                  */
3315                 bool found = false;
3316
3317                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3318                 if (!found)
3319                 {
3320                         for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
3321                                 if (MatchCIDR(ip, (*i).c_str()))
3322                                         found = true;
3323
3324                         if (!found)
3325                         {
3326                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3327                                 close(newsock);
3328                                 return false;
3329                         }
3330                 }
3331                 TreeSocket* s = new TreeSocket(this->Instance, newsock, ip);
3332                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3333                 return true;
3334         }
3335 };
3336
3337 /** This class is used to resolve server hostnames during /connect and autoconnect.
3338  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3339  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3340  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3341  * will have an IP address which we can then use to continue our connection.
3342  */
3343 class ServernameResolver : public Resolver
3344 {
3345  private:
3346         /** A copy of the Link tag info for what we're connecting to.
3347          * We take a copy, rather than using a pointer, just in case the
3348          * admin takes the tag away and rehashes while the domain is resolving.
3349          */
3350         Link MyLink;
3351  public:
3352         ServernameResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3353         {
3354                 /* Nothing in here, folks */
3355         }
3356
3357         void OnLookupComplete(const std::string &result)
3358         {
3359                 /* Initiate the connection, now that we have an IP to use.
3360                  * Passing a hostname directly to InspSocket causes it to
3361                  * just bail and set its FD to -1.
3362                  */
3363                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3364                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3365                 {
3366                         TreeSocket* newsocket = new TreeSocket(ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3367                         if (newsocket->GetFd() > -1)
3368                         {
3369                                 /* We're all OK */
3370                         }
3371                         else
3372                         {
3373                                 /* Something barfed, show the opers */
3374                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3375                                 delete newsocket;
3376                                 DoFailOver(&MyLink);
3377                         }
3378                 }
3379         }
3380
3381         void OnError(ResolverError e, const std::string &errormessage)
3382         {
3383                 /* Ooops! */
3384                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3385                 DoFailOver(&MyLink);
3386         }
3387 };
3388
3389 class SecurityIPResolver : public Resolver
3390 {
3391  private:
3392         Link MyLink;
3393  public:
3394         SecurityIPResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3395         {
3396         }
3397
3398         void OnLookupComplete(const std::string &result)
3399         {
3400                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3401                 ValidIPs.push_back(result);
3402         }
3403
3404         void OnError(ResolverError e, const std::string &errormessage)
3405         {
3406                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3407         }
3408 };
3409
3410 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3411 {
3412         for (unsigned int c = 0; c < list.size(); c++)
3413         {
3414                 if (list[c] == server)
3415                 {
3416                         return;
3417                 }
3418         }
3419         list.push_back(server);
3420 }
3421
3422 /** returns a list of DIRECT servernames for a specific channel */
3423 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3424 {
3425         CUList *ulist = c->GetUsers();
3426         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3427         {
3428                 if (i->second->GetFd() < 0)
3429                 {
3430                         TreeServer* best = BestRouteTo(i->second->server);
3431                         if (best)
3432                                 AddThisServer(best,list);
3433                 }
3434         }
3435         return;
3436 }
3437
3438 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3439 {
3440         TreeServer* omitroute = BestRouteTo(omit);
3441         if ((command == "NOTICE") || (command == "PRIVMSG"))
3442         {
3443                 if (params.size() >= 2)
3444                 {
3445                         /* Prefixes */
3446                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3447                         {
3448                                 params[0] = params[0].substr(1, params[0].length()-1);
3449                         }
3450                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3451                         {
3452                                 // special routing for private messages/notices
3453                                 userrec* d = ServerInstance->FindNick(params[0]);
3454                                 if (d)
3455                                 {
3456                                         std::deque<std::string> par;
3457                                         par.push_back(params[0]);
3458                                         par.push_back(":"+params[1]);
3459                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3460                                         return true;
3461                                 }
3462                         }
3463                         else if (*(params[0].c_str()) == '$')
3464                         {
3465                                 std::deque<std::string> par;
3466                                 par.push_back(params[0]);
3467                                 par.push_back(":"+params[1]);
3468                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3469                                 return true;
3470                         }
3471                         else
3472                         {
3473                                 ServerInstance->Log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3474                                 chanrec* c = ServerInstance->FindChan(params[0]);
3475                                 if (c)
3476                                 {
3477                                         std::deque<TreeServer*> list;
3478                                         GetListOfServersForChannel(c,list);
3479                                         ServerInstance->Log(DEBUG,"Got a list of %d servers",list.size());
3480                                         unsigned int lsize = list.size();
3481                                         for (unsigned int i = 0; i < lsize; i++)
3482                                         {
3483                                                 TreeSocket* Sock = list[i]->GetSocket();
3484                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3485                                                 {
3486                                                         ServerInstance->Log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3487                                                         Sock->WriteLine(data);
3488                                                 }
3489                                         }
3490                                         return true;
3491                                 }
3492                         }
3493                 }
3494         }
3495         unsigned int items = TreeRoot->ChildCount();
3496         for (unsigned int x = 0; x < items; x++)
3497         {
3498                 TreeServer* Route = TreeRoot->GetChild(x);
3499                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3500                 {
3501                         TreeSocket* Sock = Route->GetSocket();
3502                         if (Sock)
3503                                 Sock->WriteLine(data);
3504                 }
3505         }
3506         return true;
3507 }
3508
3509 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3510 {
3511         TreeServer* omitroute = BestRouteTo(omit);
3512         std::string FullLine = ":" + prefix + " " + command;
3513         unsigned int words = params.size();
3514         for (unsigned int x = 0; x < words; x++)
3515         {
3516                 FullLine = FullLine + " " + params[x];
3517         }
3518         unsigned int items = TreeRoot->ChildCount();
3519         for (unsigned int x = 0; x < items; x++)
3520         {
3521                 TreeServer* Route = TreeRoot->GetChild(x);
3522                 // Send the line IF:
3523                 // The route has a socket (its a direct connection)
3524                 // The route isnt the one to be omitted
3525                 // The route isnt the path to the one to be omitted
3526                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3527                 {
3528                         TreeSocket* Sock = Route->GetSocket();
3529                         if (Sock)
3530                                 Sock->WriteLine(FullLine);
3531                 }
3532         }
3533         return true;
3534 }
3535
3536 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3537 {
3538         std::string FullLine = ":" + prefix + " " + command;
3539         unsigned int words = params.size();
3540         for (unsigned int x = 0; x < words; x++)
3541         {
3542                 FullLine = FullLine + " " + params[x];
3543         }
3544         unsigned int items = TreeRoot->ChildCount();
3545         for (unsigned int x = 0; x < items; x++)
3546         {
3547                 TreeServer* Route = TreeRoot->GetChild(x);
3548                 if (Route && Route->GetSocket())
3549                 {
3550                         TreeSocket* Sock = Route->GetSocket();
3551                         if (Sock)
3552                                 Sock->WriteLine(FullLine);
3553                 }
3554         }
3555         return true;
3556 }
3557
3558 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3559 {
3560         std::string spfx = prefix;
3561         std::string scmd = command;
3562         return DoOneToMany(spfx, scmd, params);
3563 }
3564
3565 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3566 {
3567         std::string spfx = prefix;
3568         std::string scmd = command;
3569         return DoOneToAllButSender(spfx, scmd, params, omit);
3570 }
3571
3572 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3573 {
3574         TreeServer* Route = BestRouteTo(target);
3575         if (Route)
3576         {
3577                 std::string FullLine = ":" + prefix + " " + command;
3578                 unsigned int words = params.size();
3579                 for (unsigned int x = 0; x < words; x++)
3580                 {
3581                         FullLine = FullLine + " " + params[x];
3582                 }
3583                 if (Route && Route->GetSocket())
3584                 {
3585                         TreeSocket* Sock = Route->GetSocket();
3586                         if (Sock)
3587                                 Sock->WriteLine(FullLine);
3588                 }
3589                 return true;
3590         }
3591         else
3592         {
3593                 return false;
3594         }
3595 }
3596
3597 std::vector<TreeSocket*> Bindings;
3598
3599 void ReadConfiguration(bool rebind)
3600 {
3601         Conf = new ConfigReader(ServerInstance);
3602         if (rebind)
3603         {
3604                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3605                 {
3606                         std::string Type = Conf->ReadValue("bind","type",j);
3607                         std::string IP = Conf->ReadValue("bind","address",j);
3608                         long Port = Conf->ReadInteger("bind","port",j,true);
3609                         if (Type == "servers")
3610                         {
3611                                 if (IP == "*")
3612                                 {
3613                                         IP = "";
3614                                 }
3615                                 TreeSocket* listener = new TreeSocket(ServerInstance, IP.c_str(),Port,true,10);
3616                                 if (listener->GetState() == I_LISTENING)
3617                                 {
3618                                         Bindings.push_back(listener);
3619                                 }
3620                                 else
3621                                 {
3622                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3623                                         listener->Close();
3624                                         DELETE(listener);
3625                                 }
3626                         }
3627                 }
3628         }
3629         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3630         HideULines = Conf->ReadFlag("options","hideulines",0);
3631         LinkBlocks.clear();
3632         ValidIPs.clear();
3633         for (int j =0; j < Conf->Enumerate("link"); j++)
3634         {
3635                 Link L;
3636                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3637                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3638                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3639                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3640                 L.Port = Conf->ReadInteger("link","port",j,true);
3641                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3642                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3643                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3644                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3645                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3646                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3647                 /* Bugfix by brain, do not allow people to enter bad configurations */
3648                 if (L.Name != ServerInstance->Config->ServerName)
3649                 {
3650                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3651                         {
3652                                 ValidIPs.push_back(L.IPAddr);
3653
3654                                 if (Allow.length())
3655                                         ValidIPs.push_back(Allow);
3656
3657                                 /* Needs resolving */
3658                                 insp_inaddr binip;
3659                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3660                                 {
3661                                         try
3662                                         {
3663                                                 SecurityIPResolver* sr = new SecurityIPResolver(ServerInstance, L.IPAddr, L);
3664                                                 ServerInstance->AddResolver(sr);
3665                                         }
3666                                         catch (ModuleException& e)
3667                                         {
3668                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3669                                         }
3670                                 }
3671
3672                                 LinkBlocks.push_back(L);
3673                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3674                         }
3675                         else
3676                         {
3677                                 if (L.IPAddr == "")
3678                                 {
3679                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3680                                 }
3681                                 else if (L.RecvPass == "")
3682                                 {
3683                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3684                                 }
3685                                 else if (L.SendPass == "")
3686                                 {
3687                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3688                                 }
3689                                 else if (L.Name == "")
3690                                 {
3691                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3692                                 }
3693                                 else if (!L.Port)
3694                                 {
3695                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3696                                 }
3697                         }
3698                 }
3699                 else
3700                 {
3701                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3702                 }
3703         }
3704         DELETE(Conf);
3705 }
3706
3707
3708 class ModuleSpanningTree : public Module
3709 {
3710         std::vector<TreeSocket*> Bindings;
3711         int line;
3712         int NumServers;
3713         unsigned int max_local;
3714         unsigned int max_global;
3715         cmd_rconnect* command_rconnect;
3716
3717  public:
3718
3719         ModuleSpanningTree(InspIRCd* Me)
3720                 : Module::Module(Me), max_local(0), max_global(0)
3721         {
3722
3723                 Bindings.clear();
3724
3725                 ::ServerInstance = Me;
3726
3727                 // Create the root of the tree
3728                 TreeRoot = new TreeServer(ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3729
3730                 ReadConfiguration(true);
3731
3732                 command_rconnect = new cmd_rconnect(ServerInstance, this);
3733                 ServerInstance->AddCommand(command_rconnect);
3734         }
3735
3736         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3737         {
3738                 std::string Parent = TreeRoot->GetName();
3739                 if (Current->GetParent())
3740                 {
3741                         Parent = Current->GetParent()->GetName();
3742                 }
3743                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3744                 {
3745                         if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3746                         {
3747                                 if (*user->oper)
3748                                 {
3749                                          ShowLinks(Current->GetChild(q),user,hops+1);
3750                                 }
3751                         }
3752                         else
3753                         {
3754                                 ShowLinks(Current->GetChild(q),user,hops+1);
3755                         }
3756                 }
3757                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3758                 if ((HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3759                         return;
3760                 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());
3761         }
3762
3763         int CountLocalServs()
3764         {
3765                 return TreeRoot->ChildCount();
3766         }
3767
3768         int CountServs()
3769         {
3770                 return serverlist.size();
3771         }
3772
3773         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3774         {
3775                 ShowLinks(TreeRoot,user,0);
3776                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3777                 return;
3778         }
3779
3780         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3781         {
3782                 unsigned int n_users = ServerInstance->UserCount();
3783
3784                 /* Only update these when someone wants to see them, more efficient */
3785                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3786                         max_local = ServerInstance->LocalUserCount();
3787                 if (n_users > max_global)
3788                         max_global = n_users;
3789
3790                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3791                 if (ServerInstance->OperCount())
3792                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3793                 if (ServerInstance->UnregisteredUserCount())
3794                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3795                 if (ServerInstance->ChannelCount())
3796                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3797                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3798                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3799                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3800                 return;
3801         }
3802
3803         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3804
3805         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3806         {
3807                 if (line < 128)
3808                 {
3809                         for (int t = 0; t < depth; t++)
3810                         {
3811                                 matrix[line][t] = ' ';
3812                         }
3813
3814                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3815                         // a 'Spacer' String to compensate.
3816                         char spacer[40];
3817
3818                         memset(spacer,' ',40);
3819                         if ((40 - Current->GetName().length() - depth) > 1) {
3820                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3821                         }
3822                         else
3823                         {
3824                                 spacer[5] = '\0';
3825                         }
3826
3827                         float percent;
3828                         char text[80];
3829                         if (ServerInstance->clientlist.size() == 0) {
3830                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3831                                 percent = 0;
3832                         }
3833                         else
3834                         {
3835                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3836                         }
3837                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3838                         totusers += Current->GetUserCount();
3839                         totservers++;
3840                         strlcpy(&matrix[line][depth],text,80);
3841                         line++;
3842                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3843                         {
3844                                 if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3845                                 {
3846                                         if (*user->oper)
3847                                         {
3848                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3849                                         }
3850                                 }
3851                                 else
3852                                 {
3853                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3854                                 }
3855                         }
3856                 }
3857         }
3858
3859         int HandleMotd(const char** parameters, int pcnt, userrec* user)
3860         {
3861                 if (pcnt > 0)
3862                 {
3863                         /* Remote MOTD, the server is within the 1st parameter */
3864                         std::deque<std::string> params;
3865                         params.push_back(parameters[0]);
3866
3867                         /* Send it out remotely, generate no reply yet */
3868                         TreeServer* s = FindServerMask(parameters[0]);
3869                         if (s)
3870                         {
3871                                 DoOneToOne(user->nick, "MOTD", params, s->GetName());
3872                         }
3873                         else
3874                         {
3875                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3876                         }
3877                         return 1;
3878                 }
3879                 return 0;
3880         }
3881
3882         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
3883         {
3884                 if (pcnt > 0)
3885                 {
3886                         /* Remote ADMIN, the server is within the 1st parameter */
3887                         std::deque<std::string> params;
3888                         params.push_back(parameters[0]);
3889
3890                         /* Send it out remotely, generate no reply yet */
3891                         TreeServer* s = FindServerMask(parameters[0]);
3892                         if (s)
3893                         {
3894                                 DoOneToOne(user->nick, "ADMIN", params, s->GetName());
3895                         }
3896                         else
3897                         {
3898                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3899                         }
3900                         return 1;
3901                 }
3902                 return 0;
3903         }
3904
3905         int HandleStats(const char** parameters, int pcnt, userrec* user)
3906         {
3907                 if (pcnt > 1)
3908                 {
3909                         /* Remote STATS, the server is within the 2nd parameter */
3910                         std::deque<std::string> params;
3911                         params.push_back(parameters[0]);
3912                         params.push_back(parameters[1]);
3913                         /* Send it out remotely, generate no reply yet */
3914                         TreeServer* s = FindServerMask(parameters[1]);
3915                         if (s)
3916                         {
3917                                 params[1] = s->GetName();
3918                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
3919                         }
3920                         else
3921                         {
3922                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3923                         }
3924                         return 1;
3925                 }
3926                 return 0;
3927         }
3928
3929         // Ok, prepare to be confused.
3930         // After much mulling over how to approach this, it struck me that
3931         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3932         // keeping track of a ton of ascii characters, and line by line
3933         // under recursion working out where to place them using multiplications
3934         // and divisons, we instead render the map onto a backplane of characters
3935         // (a character matrix), then draw the branches as a series of "L" shapes
3936         // from the nodes. This is not only friendlier on CPU it uses less stack.
3937
3938         void HandleMap(const char** parameters, int pcnt, userrec* user)
3939         {
3940                 // This array represents a virtual screen which we will
3941                 // "scratch" draw to, as the console device of an irc
3942                 // client does not provide for a proper terminal.
3943                 float totusers = 0;
3944                 float totservers = 0;
3945                 char matrix[128][80];
3946                 for (unsigned int t = 0; t < 128; t++)
3947                 {
3948                         matrix[t][0] = '\0';
3949                 }
3950                 line = 0;
3951                 // The only recursive bit is called here.
3952                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3953                 // Process each line one by one. The algorithm has a limit of
3954                 // 128 servers (which is far more than a spanning tree should have
3955                 // anyway, so we're ok). This limit can be raised simply by making
3956                 // the character matrix deeper, 128 rows taking 10k of memory.
3957                 for (int l = 1; l < line; l++)
3958                 {
3959                         // scan across the line looking for the start of the
3960                         // servername (the recursive part of the algorithm has placed
3961                         // the servers at indented positions depending on what they
3962                         // are related to)
3963                         int first_nonspace = 0;
3964                         while (matrix[l][first_nonspace] == ' ')
3965                         {
3966                                 first_nonspace++;
3967                         }
3968                         first_nonspace--;
3969                         // Draw the `- (corner) section: this may be overwritten by
3970                         // another L shape passing along the same vertical pane, becoming
3971                         // a |- (branch) section instead.
3972                         matrix[l][first_nonspace] = '-';
3973                         matrix[l][first_nonspace-1] = '`';
3974                         int l2 = l - 1;
3975                         // Draw upwards until we hit the parent server, causing possibly
3976                         // other corners (`-) to become branches (|-)
3977                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3978                         {
3979                                 matrix[l2][first_nonspace-1] = '|';
3980                                 l2--;
3981                         }
3982                 }
3983                 // dump the whole lot to the user. This is the easy bit, honest.
3984                 for (int t = 0; t < line; t++)
3985                 {
3986                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
3987                 }
3988                 float avg_users = totusers / totservers;
3989                 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);
3990         user->WriteServ("007 %s :End of /MAP",user->nick);
3991                 return;
3992         }
3993
3994         int HandleSquit(const char** parameters, int pcnt, userrec* user)
3995         {
3996                 TreeServer* s = FindServerMask(parameters[0]);
3997                 if (s)
3998                 {
3999                         if (s == TreeRoot)
4000                         {
4001                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4002                                 return 1;
4003                         }
4004                         TreeSocket* sock = s->GetSocket();
4005                         if (sock)
4006                         {
4007                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4008                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4009                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
4010                                 ServerInstance->SE->DelFd(sock);
4011                                 sock->Close();
4012                                 delete sock;
4013                         }
4014                         else
4015                         {
4016                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
4017                         }
4018                 }
4019                 else
4020                 {
4021                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4022                 }
4023                 return 1;
4024         }
4025
4026         int HandleTime(const char** parameters, int pcnt, userrec* user)
4027         {
4028                 if ((IS_LOCAL(user)) && (pcnt))
4029                 {
4030                         TreeServer* found = FindServerMask(parameters[0]);
4031                         if (found)
4032                         {
4033                                 // we dont' override for local server
4034                                 if (found == TreeRoot)
4035                                         return 0;
4036
4037                                 std::deque<std::string> params;
4038                                 params.push_back(found->GetName());
4039                                 params.push_back(user->nick);
4040                                 DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4041                         }
4042                         else
4043                         {
4044                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4045                         }
4046                 }
4047                 return 1;
4048         }
4049
4050         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4051         {
4052                 if ((IS_LOCAL(user)) && (pcnt > 1))
4053                 {
4054                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4055                         if ((remote) && (remote->GetFd() < 0))
4056                         {
4057                                 std::deque<std::string> params;
4058                                 params.push_back(parameters[1]);
4059                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
4060                                 return 1;
4061                         }
4062                         else if (!remote)
4063                         {
4064                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4065                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4066                                 return 1;
4067                         }
4068                 }
4069                 return 0;
4070         }
4071
4072         void DoPingChecks(time_t curtime)
4073         {
4074                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
4075                 {
4076                         TreeServer* serv = TreeRoot->GetChild(j);
4077                         TreeSocket* sock = serv->GetSocket();
4078                         if (sock)
4079                         {
4080                                 if (curtime >= serv->NextPingTime())
4081                                 {
4082                                         if (serv->AnsweredLastPing())
4083                                         {
4084                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4085                                                 serv->SetNextPingTime(curtime + 60);
4086                                         }
4087                                         else
4088                                         {
4089                                                 // they didnt answer, boot them
4090                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4091                                                 sock->Squit(serv,"Ping timeout");
4092                                                 ServerInstance->SE->DelFd(sock);
4093                                                 sock->Close();
4094                                                 delete sock;
4095                                                 return;
4096                                         }
4097                                 }
4098                         }
4099                 }
4100         }
4101
4102         void ConnectServer(Link* x)
4103         {
4104                 insp_inaddr binip;
4105
4106                 /* Do we already have an IP? If so, no need to resolve it. */
4107                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4108                 {
4109                         TreeSocket* newsocket = new TreeSocket(ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4110                         if (newsocket->GetFd() > -1)
4111                         {
4112                                 /* Handled automatically on success */
4113                         }
4114                         else
4115                         {
4116                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4117                                 delete newsocket;
4118                                 this->DoFailOver(x);
4119                         }
4120                 }
4121                 else
4122                 {
4123                         try
4124                         {
4125                                 ServernameResolver* snr = new ServernameResolver(ServerInstance,x->IPAddr, *x);
4126                                 ServerInstance->AddResolver(snr);
4127                         }
4128                         catch (ModuleException& e)
4129                         {
4130                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4131                                 this->DoFailOver(x);
4132                         }
4133                 }
4134         }
4135
4136         void DoFailOver(Link* x)
4137         {
4138                 if (x->FailOver.length())
4139                 {
4140                         if (x->FailOver == x->Name)
4141                         {
4142                                 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());
4143                                 return;
4144                         }
4145                         Link* TryThisOne = this->FindLink(x->FailOver.c_str());
4146                         if (TryThisOne)
4147                         {
4148                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
4149                                 ConnectServer(TryThisOne);
4150                         }
4151                         else
4152                         {
4153                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
4154                         }
4155                 }
4156         }
4157
4158         Link* FindLink(const std::string& name)
4159         {
4160                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4161                 {
4162                         if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
4163                         {
4164                                 return &(*x);
4165                         }
4166                 }
4167                 return NULL;
4168         }
4169
4170         void AutoConnectServers(time_t curtime)
4171         {
4172                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4173                 {
4174                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4175                         {
4176                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4177                                 x->NextConnectTime = curtime + x->AutoConnect;
4178                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4179                                 if (x->FailOver.length())
4180                                 {
4181                                         TreeServer* CheckFailOver = FindServer(x->FailOver.c_str());
4182                                         if (CheckFailOver)
4183                                         {
4184                                                 /* The failover for this server is currently a member of the network.
4185                                                  * The failover probably succeeded, where the main link did not.
4186                                                  * Don't try the main link until the failover is gone again.
4187                                                  */
4188                                                 continue;
4189                                         }
4190                                 }
4191                                 if (!CheckDupe)
4192                                 {
4193                                         // an autoconnected server is not connected. Check if its time to connect it
4194                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4195                                         this->ConnectServer(&(*x));
4196                                 }
4197                         }
4198                 }
4199         }
4200
4201         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4202         {
4203                 // we've already checked if pcnt > 0, so this is safe
4204                 TreeServer* found = FindServerMask(parameters[0]);
4205                 if (found)
4206                 {
4207                         std::string Version = found->GetVersion();
4208                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4209                         if (found == TreeRoot)
4210                         {
4211                                 std::stringstream out(ServerInstance->Config->data005);
4212                                 std::string token = "";
4213                                 std::string line5 = "";
4214                                 int token_counter = 0;
4215
4216                                 while (!out.eof())
4217                                 {
4218                                         out >> token;
4219                                         line5 = line5 + token + " ";
4220                                         token_counter++;
4221
4222                                         if ((token_counter >= 13) || (out.eof() == true))
4223                                         {
4224                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4225                                                 line5 = "";
4226                                                 token_counter = 0;
4227                                         }
4228                                 }
4229                         }
4230                 }
4231                 else
4232                 {
4233                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4234                 }
4235                 return 1;
4236         }
4237
4238         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4239         {
4240                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4241                 {
4242                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4243                         {
4244                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4245                                 if (!CheckDupe)
4246                                 {
4247                                         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);
4248                                         ConnectServer(&(*x));
4249                                         return 1;
4250                                 }
4251                                 else
4252                                 {
4253                                         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());
4254                                         return 1;
4255                                 }
4256                         }
4257                 }
4258                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4259                 return 1;
4260         }
4261
4262         virtual int OnStats(char statschar, userrec* user, string_list &results)
4263         {
4264                 if (statschar == 'c')
4265                 {
4266                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
4267                         {
4268                                 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');
4269                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
4270                         }
4271                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4272                         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);
4273                         return 1;
4274                 }
4275                 return 0;
4276         }
4277
4278         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4279         {
4280                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4281                 if (!validated)
4282                         return 0;
4283
4284                 if (command == "CONNECT")
4285                 {
4286                         return this->HandleConnect(parameters,pcnt,user);
4287                 }
4288                 else if (command == "STATS")
4289                 {
4290                         return this->HandleStats(parameters,pcnt,user);
4291                 }
4292                 else if (command == "MOTD")
4293                 {
4294                         return this->HandleMotd(parameters,pcnt,user);
4295                 }
4296                 else if (command == "ADMIN")
4297                 {
4298                         return this->HandleAdmin(parameters,pcnt,user);
4299                 }
4300                 else if (command == "SQUIT")
4301                 {
4302                         return this->HandleSquit(parameters,pcnt,user);
4303                 }
4304                 else if (command == "MAP")
4305                 {
4306                         this->HandleMap(parameters,pcnt,user);
4307                         return 1;
4308                 }
4309                 else if ((command == "TIME") && (pcnt > 0))
4310                 {
4311                         return this->HandleTime(parameters,pcnt,user);
4312                 }
4313                 else if (command == "LUSERS")
4314                 {
4315                         this->HandleLusers(parameters,pcnt,user);
4316                         return 1;
4317                 }
4318                 else if (command == "LINKS")
4319                 {
4320                         this->HandleLinks(parameters,pcnt,user);
4321                         return 1;
4322                 }
4323                 else if (command == "WHOIS")
4324                 {
4325                         if (pcnt > 1)
4326                         {
4327                                 // remote whois
4328                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4329                         }
4330                 }
4331                 else if ((command == "VERSION") && (pcnt > 0))
4332                 {
4333                         this->HandleVersion(parameters,pcnt,user);
4334                         return 1;
4335                 }
4336
4337                 return 0;
4338         }
4339
4340         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4341         {
4342                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4343                 {
4344                         // this bit of code cleverly routes all module commands
4345                         // to all remote severs *automatically* so that modules
4346                         // can just handle commands locally, without having
4347                         // to have any special provision in place for remote
4348                         // commands and linking protocols.
4349                         std::deque<std::string> params;
4350                         params.clear();
4351                         for (int j = 0; j < pcnt; j++)
4352                         {
4353                                 if (strchr(parameters[j],' '))
4354                                 {
4355                                         params.push_back(":" + std::string(parameters[j]));
4356                                 }
4357                                 else
4358                                 {
4359                                         params.push_back(std::string(parameters[j]));
4360                                 }
4361                         }
4362                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4363                         DoOneToMany(user->nick,command,params);
4364                 }
4365         }
4366
4367         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4368         {
4369                 TreeServer* s = FindServer(servername);
4370                 if (s)
4371                 {
4372                         description = s->GetDesc();
4373                 }
4374         }
4375
4376         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4377         {
4378                 if (IS_LOCAL(source))
4379                 {
4380                         std::deque<std::string> params;
4381                         params.push_back(dest->nick);
4382                         params.push_back(channel->name);
4383                         DoOneToMany(source->nick,"INVITE",params);
4384                 }
4385         }
4386
4387         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4388         {
4389                 std::deque<std::string> params;
4390                 params.push_back(chan->name);
4391                 params.push_back(":"+topic);
4392                 DoOneToMany(user->nick,"TOPIC",params);
4393         }
4394
4395         virtual void OnWallops(userrec* user, const std::string &text)
4396         {
4397                 if (IS_LOCAL(user))
4398                 {
4399                         std::deque<std::string> params;
4400                         params.push_back(":"+text);
4401                         DoOneToMany(user->nick,"WALLOPS",params);
4402                 }
4403         }
4404
4405         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4406         {
4407                 if (target_type == TYPE_USER)
4408                 {
4409                         userrec* d = (userrec*)dest;
4410                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4411                         {
4412                                 std::deque<std::string> params;
4413                                 params.clear();
4414                                 params.push_back(d->nick);
4415                                 params.push_back(":"+text);
4416                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4417                         }
4418                 }
4419                 else if (target_type == TYPE_CHANNEL)
4420                 {
4421                         if (IS_LOCAL(user))
4422                         {
4423                                 chanrec *c = (chanrec*)dest;
4424                                 if (c)
4425                                 {
4426                                         std::string cname = c->name;
4427                                         if (status)
4428                                                 cname = status + cname;
4429                                         std::deque<TreeServer*> list;
4430                                         GetListOfServersForChannel(c,list);
4431                                         unsigned int ucount = list.size();
4432                                         for (unsigned int i = 0; i < ucount; i++)
4433                                         {
4434                                                 TreeSocket* Sock = list[i]->GetSocket();
4435                                                 if (Sock)
4436                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4437                                         }
4438                                 }
4439                         }
4440                 }
4441                 else if (target_type == TYPE_SERVER)
4442                 {
4443                         if (IS_LOCAL(user))
4444                         {
4445                                 char* target = (char*)dest;
4446                                 std::deque<std::string> par;
4447                                 par.push_back(target);
4448                                 par.push_back(":"+text);
4449                                 DoOneToMany(user->nick,"NOTICE",par);
4450                         }
4451                 }
4452         }
4453
4454         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4455         {
4456                 if (target_type == TYPE_USER)
4457                 {
4458                         // route private messages which are targetted at clients only to the server
4459                         // which needs to receive them
4460                         userrec* d = (userrec*)dest;
4461                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4462                         {
4463                                 std::deque<std::string> params;
4464                                 params.clear();
4465                                 params.push_back(d->nick);
4466                                 params.push_back(":"+text);
4467                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4468                         }
4469                 }
4470                 else if (target_type == TYPE_CHANNEL)
4471                 {
4472                         if (IS_LOCAL(user))
4473                         {
4474                                 chanrec *c = (chanrec*)dest;
4475                                 if (c)
4476                                 {
4477                                         std::string cname = c->name;
4478                                         if (status)
4479                                                 cname = status + cname;
4480                                         std::deque<TreeServer*> list;
4481                                         GetListOfServersForChannel(c,list);
4482                                         unsigned int ucount = list.size();
4483                                         for (unsigned int i = 0; i < ucount; i++)
4484                                         {
4485                                                 TreeSocket* Sock = list[i]->GetSocket();
4486                                                 if (Sock)
4487                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4488                                         }
4489                                 }
4490                         }
4491                 }
4492                 else if (target_type == TYPE_SERVER)
4493                 {
4494                         if (IS_LOCAL(user))
4495                         {
4496                                 char* target = (char*)dest;
4497                                 std::deque<std::string> par;
4498                                 par.push_back(target);
4499                                 par.push_back(":"+text);
4500                                 DoOneToMany(user->nick,"PRIVMSG",par);
4501                         }
4502                 }
4503         }
4504
4505         virtual void OnBackgroundTimer(time_t curtime)
4506         {
4507                 AutoConnectServers(curtime);
4508                 DoPingChecks(curtime);
4509         }
4510
4511         virtual void OnUserJoin(userrec* user, chanrec* channel)
4512         {
4513                 // Only do this for local users
4514                 if (IS_LOCAL(user))
4515                 {
4516                         char ts[24];
4517                         snprintf(ts,24,"%lu",(unsigned long)channel->age);
4518
4519                         std::deque<std::string> params;
4520                         params.clear();
4521                         params.push_back(channel->name);
4522
4523                         /** XXX: The client protocol will IGNORE this parameter.
4524                          * We could make use of it if we wanted to keep the TS
4525                          * in step if somehow we lose it.
4526                          */
4527                         params.push_back(ts);
4528
4529                         if (channel->GetUserCounter() > 1)
4530                         {
4531                                 // not the first in the channel
4532                                 DoOneToMany(user->nick,"JOIN",params);
4533                         }
4534                         else
4535                         {
4536                                 // first in the channel, set up their permissions
4537                                 // and the channel TS with FJOIN.
4538                                 params.clear();
4539                                 params.push_back(channel->name);
4540                                 params.push_back(ts);
4541                                 params.push_back("@,"+std::string(user->nick));
4542                                 DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4543                         }
4544                 }
4545         }
4546
4547         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4548         {
4549                 // only occurs for local clients
4550                 if (user->registered != REG_ALL)
4551                         return;
4552                 std::deque<std::string> params;
4553                 params.push_back(newhost);
4554                 DoOneToMany(user->nick,"FHOST",params);
4555         }
4556
4557         virtual void OnChangeName(userrec* user, const std::string &gecos)
4558         {
4559                 // only occurs for local clients
4560                 if (user->registered != REG_ALL)
4561                         return;
4562                 std::deque<std::string> params;
4563                 params.push_back(gecos);
4564                 DoOneToMany(user->nick,"FNAME",params);
4565         }
4566
4567         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4568         {
4569                 if (IS_LOCAL(user))
4570                 {
4571                         std::deque<std::string> params;
4572                         params.push_back(channel->name);
4573                         if (partmessage != "")
4574                                 params.push_back(":"+partmessage);
4575                         DoOneToMany(user->nick,"PART",params);
4576                 }
4577         }
4578
4579         virtual void OnUserConnect(userrec* user)
4580         {
4581                 char agestr[MAXBUF];
4582                 if (IS_LOCAL(user))
4583                 {
4584                         std::deque<std::string> params;
4585                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4586                         params.push_back(agestr);
4587                         params.push_back(user->nick);
4588                         params.push_back(user->host);
4589                         params.push_back(user->dhost);
4590                         params.push_back(user->ident);
4591                         params.push_back("+"+std::string(user->FormatModes()));
4592                         params.push_back(user->GetIPString());
4593                         params.push_back(":"+std::string(user->fullname));
4594                         DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4595
4596                         // User is Local, change needs to be reflected!
4597                         TreeServer* SourceServer = FindServer(user->server);
4598                         if (SourceServer)
4599                         {
4600                                 SourceServer->AddUserCount();
4601                         }
4602
4603                 }
4604         }
4605
4606         virtual void OnUserQuit(userrec* user, const std::string &reason)
4607         {
4608                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4609                 {
4610                         std::deque<std::string> params;
4611                         params.push_back(":"+reason);
4612                         DoOneToMany(user->nick,"QUIT",params);
4613                 }
4614                 // Regardless, We need to modify the user Counts..
4615                 TreeServer* SourceServer = FindServer(user->server);
4616                 if (SourceServer)
4617                 {
4618                         SourceServer->DelUserCount();
4619                 }
4620
4621         }
4622
4623         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4624         {
4625                 if (IS_LOCAL(user))
4626                 {
4627                         std::deque<std::string> params;
4628                         params.push_back(user->nick);
4629                         DoOneToMany(oldnick,"NICK",params);
4630                 }
4631         }
4632
4633         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4634         {
4635                 if ((source) && (IS_LOCAL(source)))
4636                 {
4637                         std::deque<std::string> params;
4638                         params.push_back(chan->name);
4639                         params.push_back(user->nick);
4640                         params.push_back(":"+reason);
4641                         DoOneToMany(source->nick,"KICK",params);
4642                 }
4643                 else if (!source)
4644                 {
4645                         std::deque<std::string> params;
4646                         params.push_back(chan->name);
4647                         params.push_back(user->nick);
4648                         params.push_back(":"+reason);
4649                         DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4650                 }
4651         }
4652
4653         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4654         {
4655                 std::deque<std::string> params;
4656                 params.push_back(dest->nick);
4657                 params.push_back(":"+reason);
4658                 DoOneToMany(source->nick,"KILL",params);
4659         }
4660
4661         virtual void OnRehash(const std::string &parameter)
4662         {
4663                 if (parameter != "")
4664                 {
4665                         std::deque<std::string> params;
4666                         params.push_back(parameter);
4667                         DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4668                         // check for self
4669                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4670                         {
4671                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4672                                 ServerInstance->RehashServer();
4673                         }
4674                 }
4675                 ReadConfiguration(false);
4676         }
4677
4678         // note: the protocol does not allow direct umode +o except
4679         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4680         // locally.
4681         virtual void OnOper(userrec* user, const std::string &opertype)
4682         {
4683                 if (IS_LOCAL(user))
4684                 {
4685                         std::deque<std::string> params;
4686                         params.push_back(opertype);
4687                         DoOneToMany(user->nick,"OPERTYPE",params);
4688                 }
4689         }
4690
4691         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4692         {
4693                 if (IS_LOCAL(source))
4694                 {
4695                         char type[8];
4696                         snprintf(type,8,"%cLINE",linetype);
4697                         std::string stype = type;
4698                         if (adding)
4699                         {
4700                                 char sduration[MAXBUF];
4701                                 snprintf(sduration,MAXBUF,"%ld",duration);
4702                                 std::deque<std::string> params;
4703                                 params.push_back(host);
4704                                 params.push_back(sduration);
4705                                 params.push_back(":"+reason);
4706                                 DoOneToMany(source->nick,stype,params);
4707                         }
4708                         else
4709                         {
4710                                 std::deque<std::string> params;
4711                                 params.push_back(host);
4712                                 DoOneToMany(source->nick,stype,params);
4713                         }
4714                 }
4715         }
4716
4717         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4718         {
4719                 OnLine(source,hostmask,true,'G',duration,reason);
4720         }
4721
4722         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4723         {
4724                 OnLine(source,ipmask,true,'Z',duration,reason);
4725         }
4726
4727         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4728         {
4729                 OnLine(source,nickmask,true,'Q',duration,reason);
4730         }
4731
4732         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4733         {
4734                 OnLine(source,hostmask,true,'E',duration,reason);
4735         }
4736
4737         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4738         {
4739                 OnLine(source,hostmask,false,'G',0,"");
4740         }
4741
4742         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4743         {
4744                 OnLine(source,ipmask,false,'Z',0,"");
4745         }
4746
4747         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4748         {
4749                 OnLine(source,nickmask,false,'Q',0,"");
4750         }
4751
4752         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4753         {
4754                 OnLine(source,hostmask,false,'E',0,"");
4755         }
4756
4757         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4758         {
4759                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4760                 {
4761                         if (target_type == TYPE_USER)
4762                         {
4763                                 userrec* u = (userrec*)dest;
4764                                 std::deque<std::string> params;
4765                                 params.push_back(u->nick);
4766                                 params.push_back(text);
4767                                 DoOneToMany(user->nick,"MODE",params);
4768                         }
4769                         else
4770                         {
4771                                 chanrec* c = (chanrec*)dest;
4772                                 std::deque<std::string> params;
4773                                 params.push_back(c->name);
4774                                 params.push_back(text);
4775                                 DoOneToMany(user->nick,"MODE",params);
4776                         }
4777                 }
4778         }
4779
4780         virtual void OnSetAway(userrec* user)
4781         {
4782                 if (IS_LOCAL(user))
4783                 {
4784                         std::deque<std::string> params;
4785                         params.push_back(":"+std::string(user->awaymsg));
4786                         DoOneToMany(user->nick,"AWAY",params);
4787                 }
4788         }
4789
4790         virtual void OnCancelAway(userrec* user)
4791         {
4792                 if (IS_LOCAL(user))
4793                 {
4794                         std::deque<std::string> params;
4795                         params.clear();
4796                         DoOneToMany(user->nick,"AWAY",params);
4797                 }
4798         }
4799
4800         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4801         {
4802                 TreeSocket* s = (TreeSocket*)opaque;
4803                 if (target)
4804                 {
4805                         if (target_type == TYPE_USER)
4806                         {
4807                                 userrec* u = (userrec*)target;
4808                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4809                         }
4810                         else
4811                         {
4812                                 chanrec* c = (chanrec*)target;
4813                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4814                         }
4815                 }
4816         }
4817
4818         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4819         {
4820                 TreeSocket* s = (TreeSocket*)opaque;
4821                 if (target)
4822                 {
4823                         if (target_type == TYPE_USER)
4824                         {
4825                                 userrec* u = (userrec*)target;
4826                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4827                         }
4828                         else if (target_type == TYPE_OTHER)
4829                         {
4830                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4831                         }
4832                         else if (target_type == TYPE_CHANNEL)
4833                         {
4834                                 chanrec* c = (chanrec*)target;
4835                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4836                         }
4837                 }
4838         }
4839
4840         virtual void OnEvent(Event* event)
4841         {
4842                 if (event->GetEventID() == "send_metadata")
4843                 {
4844                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4845                         if (params->size() < 3)
4846                                 return;
4847                         (*params)[2] = ":" + (*params)[2];
4848                         DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4849                 }
4850                 else if (event->GetEventID() == "send_mode")
4851                 {
4852                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4853                         if (params->size() < 2)
4854                                 return;
4855                         // Insert the TS value of the object, either userrec or chanrec
4856                         time_t ourTS = 0;
4857                         userrec* a = ServerInstance->FindNick((*params)[0]);
4858                         if (a)
4859                         {
4860                                 ourTS = a->age;
4861                         }
4862                         else
4863                         {
4864                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4865                                 if (a)
4866                                 {
4867                                         ourTS = a->age;
4868                                 }
4869                         }
4870                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4871                         DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4872                 }
4873         }
4874
4875         virtual ~ModuleSpanningTree()
4876         {
4877         }
4878
4879         virtual Version GetVersion()
4880         {
4881                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
4882         }
4883
4884         void Implements(char* List)
4885         {
4886                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
4887                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
4888                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
4889                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
4890                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
4891                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
4892                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
4893         }
4894
4895         /* It is IMPORTANT that m_spanningtree is the last module in the chain
4896          * so that any activity it sees is FINAL, e.g. we arent going to send out
4897          * a NICK message before m_cloaking has finished putting the +x on the user,
4898          * etc etc.
4899          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
4900          * the module call queue.
4901          */
4902         Priority Prioritize()
4903         {
4904                 return PRIORITY_LAST;
4905         }
4906 };
4907
4908 void DoFailOver(Link* x)
4909 {
4910         TreeProtocolModule->DoFailOver(x);
4911 }
4912
4913 Link* FindLink(const std::string& name)
4914 {
4915         return TreeProtocolModule->FindLink(name);
4916 }
4917
4918 class ModuleSpanningTreeFactory : public ModuleFactory
4919 {
4920  public:
4921         ModuleSpanningTreeFactory()
4922         {
4923         }
4924
4925         ~ModuleSpanningTreeFactory()
4926         {
4927         }
4928
4929         virtual Module * CreateModule(InspIRCd* Me)
4930         {
4931                 TreeProtocolModule = new ModuleSpanningTree(Me);
4932                 return TreeProtocolModule;
4933         }
4934
4935 };
4936
4937
4938 extern "C" void * init_module( void )
4939 {
4940         return new ModuleSpanningTreeFactory;
4941 }