src/modules/m_spanningtree.cpp

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