src/modules/m_spanningtree.cpp

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