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 /* Announce TS changes to channels on merge */
 118 bool AnnounceTSChange;
 119
 120 std::vector<std::string> ValidIPs;
 121
 122 class UserManager : public classbase
 123 {
 124         uid_hash uids;
 125         sid_hash sids;
 126  public:
 127         UserManager()
 128         {
 129                 uids.clear();
 130                 sids.clear();
 131         }
 132
 133         std::string UserToUID(userrec* user)
 134         {
 135                 return "";
 136         }
 137
 138         std::string UIDToUser(const std::string &UID)
 139         {
 140                 return "";
 141         }
 142
 143         std::string CreateAndAdd(userrec* user)
 144         {
 145                 return "";
 146         }
 147
 148         std::string CreateAndAdd(const std::string &servername)
 149         {
 150                 return "";
 151         }
 152
 153         std::string ServerToSID(const std::string &servername)
 154         {
 155                 return "";
 156         }
 157
 158         std::string SIDToServer(const std::string &SID)
 159         {
 160                 return "";
 161         }
 162
 163         userrec* FindByID(const std::string &UID)
 164         {
 165                 return NULL;
 166         }
 167 };
 168
 169
 170 /** Each server in the tree is represented by one class of
 171  * type TreeServer. A locally connected TreeServer can
 172  * have a class of type TreeSocket associated with it, for
 173  * remote servers, the TreeSocket entry will be NULL.
 174  * Each server also maintains a pointer to its parent
 175  * (NULL if this server is ours, at the top of the tree)
 176  * and a pointer to its "Route" (see the comments in the
 177  * constructors below), and also a dynamic list of pointers
 178  * to its children which can be iterated recursively
 179  * if required. Creating or deleting objects of type
 180  i* TreeServer automatically maintains the hash_map of
 181  * TreeServer items, deleting and inserting them as they
 182  * are created and destroyed.
 183  */
 184 class TreeServer : public classbase
 185 {
 186         InspIRCd* ServerInstance;               /* Creator */
 187         TreeServer* Parent;                     /* Parent entry */
 188         TreeServer* Route;                      /* Route entry */
 189         std::vector<TreeServer*> Children;      /* List of child objects */
 190         irc::string ServerName;                 /* Server's name */
 191         std::string ServerDesc;                 /* Server's description */
 192         std::string VersionString;              /* Version string or empty string */
 193         int UserCount;                          /* Not used in this version */
 194         int OperCount;                          /* Not used in this version */
 195         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 196         time_t NextPing;                        /* After this time, the server should be PINGed*/
 197         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 198
 199  public:
 200
 201         /** We don't use this constructor. Its a dummy, and won't cause any insertion
 202          * of the TreeServer into the hash_map. See below for the two we DO use.
 203          */
 204         TreeServer(InspIRCd* Instance) : ServerInstance(Instance)
 205         {
 206                 Parent = NULL;
 207                 ServerName = "";
 208                 ServerDesc = "";
 209                 VersionString = "";
 210                 UserCount = OperCount = 0;
 211                 VersionString = ServerInstance->GetVersionString();
 212         }
 213
 214         /** We use this constructor only to create the 'root' item, TreeRoot, which
 215          * represents our own server. Therefore, it has no route, no parent, and
 216          * no socket associated with it. Its version string is our own local version.
 217          */
 218         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc)
 219         {
 220                 Parent = NULL;
 221                 VersionString = "";
 222                 UserCount = OperCount = 0;
 223                 VersionString = ServerInstance->GetVersionString();
 224                 Route = NULL;
 225                 Socket = NULL; /* Fix by brain */
 226                 AddHashEntry();
 227         }
 228
 229         /** When we create a new server, we call this constructor to initialize it.
 230          * This constructor initializes the server's Route and Parent, and sets up
 231          * its ping counters so that it will be pinged one minute from now.
 232          */
 233         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 234                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 235         {
 236                 VersionString = "";
 237                 UserCount = OperCount = 0;
 238                 this->SetNextPingTime(time(NULL) + 60);
 239                 this->SetPingFlag();
 240
 241                 /* find the 'route' for this server (e.g. the one directly connected
 242                  * to the local server, which we can use to reach it)
 243                  *
 244                  * In the following example, consider we have just added a TreeServer
 245                  * class for server G on our network, of which we are server A.
 246                  * To route traffic to G (marked with a *) we must send the data to
 247                  * B (marked with a +) so this algorithm initializes the 'Route'
 248                  * value to point at whichever server traffic must be routed through
 249                  * to get here. If we were to try this algorithm with server B,
 250                  * the Route pointer would point at its own object ('this').
 251                  *
 252                  *              A
 253                  *             / \
 254                  *          + B   C
 255                  *           / \   \
 256                  *          D   E   F
 257                  *         /         \
 258                  *      * G           H
 259                  *
 260                  * We only run this algorithm when a server is created, as
 261                  * the routes remain constant while ever the server exists, and
 262                  * do not need to be re-calculated.
 263                  */
 264
 265                 Route = Above;
 266                 if (Route == TreeRoot)
 267                 {
 268                         Route = this;
 269                 }
 270                 else
 271                 {
 272                         while (this->Route->GetParent() != TreeRoot)
 273                         {
 274                                 this->Route = Route->GetParent();
 275                         }
 276                 }
 277
 278                 /* Because recursive code is slow and takes a lot of resources,
 279                  * we store two representations of the server tree. The first
 280                  * is a recursive structure where each server references its
 281                  * children and its parent, which is used for netbursts and
 282                  * netsplits to dump the whole dataset to the other server,
 283                  * and the second is used for very fast lookups when routing
 284                  * messages and is instead a hash_map, where each item can
 285                  * be referenced by its server name. The AddHashEntry()
 286                  * call below automatically inserts each TreeServer class
 287                  * into the hash_map as it is created. There is a similar
 288                  * maintainance call in the destructor to tidy up deleted
 289                  * servers.
 290                  */
 291
 292                 this->AddHashEntry();
 293         }
 294
 295         int QuitUsers(const std::string &reason)
 296         {
 297                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 298                 const char* reason_s = reason.c_str();
 299                 std::vector<userrec*> time_to_die;
 300                 for (user_hash::iterator n = ServerInstance->clientlist.begin(); n != ServerInstance->clientlist.end(); n++)
 301                 {
 302                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 303                         {
 304                                 time_to_die.push_back(n->second);
 305                         }
 306                 }
 307                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 308                 {
 309                         userrec* a = (userrec*)*n;
 310                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 311                         if (!IS_LOCAL(a))
 312                                 userrec::QuitUser(ServerInstance,a,reason_s);
 313                 }
 314                 return time_to_die.size();
 315         }
 316
 317         /** This method is used to add the structure to the
 318          * hash_map for linear searches. It is only called
 319          * by the constructors.
 320          */
 321         void AddHashEntry()
 322         {
 323                 server_hash::iterator iter;
 324                 iter = serverlist.find(this->ServerName.c_str());
 325                 if (iter == serverlist.end())
 326                         serverlist[this->ServerName.c_str()] = this;
 327         }
 328
 329         /** This method removes the reference to this object
 330          * from the hash_map which is used for linear searches.
 331          * It is only called by the default destructor.
 332          */
 333         void DelHashEntry()
 334         {
 335                 server_hash::iterator iter;
 336                 iter = serverlist.find(this->ServerName.c_str());
 337                 if (iter != serverlist.end())
 338                         serverlist.erase(iter);
 339         }
 340
 341         /** These accessors etc should be pretty self-
 342          * explanitory.
 343          */
 344         TreeServer* GetRoute()
 345         {
 346                 return Route;
 347         }
 348
 349         std::string GetName()
 350         {
 351                 return ServerName.c_str();
 352         }
 353
 354         std::string GetDesc()
 355         {
 356                 return ServerDesc;
 357         }
 358
 359         std::string GetVersion()
 360         {
 361                 return VersionString;
 362         }
 363
 364         void SetNextPingTime(time_t t)
 365         {
 366                 this->NextPing = t;
 367                 LastPingWasGood = false;
 368         }
 369
 370         time_t NextPingTime()
 371         {
 372                 return NextPing;
 373         }
 374
 375         bool AnsweredLastPing()
 376         {
 377                 return LastPingWasGood;
 378         }
 379
 380         void SetPingFlag()
 381         {
 382                 LastPingWasGood = true;
 383         }
 384
 385         int GetUserCount()
 386         {
 387                 return UserCount;
 388         }
 389
 390         void AddUserCount()
 391         {
 392                 UserCount++;
 393         }
 394
 395         void DelUserCount()
 396         {
 397                 UserCount--;
 398         }
 399
 400         int GetOperCount()
 401         {
 402                 return OperCount;
 403         }
 404
 405         TreeSocket* GetSocket()
 406         {
 407                 return Socket;
 408         }
 409
 410         TreeServer* GetParent()
 411         {
 412                 return Parent;
 413         }
 414
 415         void SetVersion(std::string Version)
 416         {
 417                 VersionString = Version;
 418         }
 419
 420         unsigned int ChildCount()
 421         {
 422                 return Children.size();
 423         }
 424
 425         TreeServer* GetChild(unsigned int n)
 426         {
 427                 if (n < Children.size())
 428                 {
 429                         /* Make sure they  cant request
 430                          * an out-of-range object. After
 431                          * all we know what these programmer
 432                          * types are like *grin*.
 433                          */
 434                         return Children[n];
 435                 }
 436                 else
 437                 {
 438                         return NULL;
 439                 }
 440         }
 441
 442         void AddChild(TreeServer* Child)
 443         {
 444                 Children.push_back(Child);
 445         }
 446
 447         bool DelChild(TreeServer* Child)
 448         {
 449                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 450                 {
 451                         if (*a == Child)
 452                         {
 453                                 Children.erase(a);
 454                                 return true;
 455                         }
 456                 }
 457                 return false;
 458         }
 459
 460         /** Removes child nodes of this node, and of that node, etc etc.
 461          * This is used during netsplits to automatically tidy up the
 462          * server tree. It is slow, we don't use it for much else.
 463          */
 464         bool Tidy()
 465         {
 466                 bool stillchildren = true;
 467                 while (stillchildren)
 468                 {
 469                         stillchildren = false;
 470                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 471                         {
 472                                 TreeServer* s = (TreeServer*)*a;
 473                                 s->Tidy();
 474                                 Children.erase(a);
 475                                 DELETE(s);
 476                                 stillchildren = true;
 477                                 break;
 478                         }
 479                 }
 480                 return true;
 481         }
 482
 483         ~TreeServer()
 484         {
 485                 /* We'd better tidy up after ourselves, eh? */
 486                 this->DelHashEntry();
 487         }
 488 };
 489
 490 /** The Link class might as well be a struct,
 491  * but this is C++ and we don't believe in structs (!).
 492  * It holds the entire information of one <link>
 493  * tag from the main config file. We maintain a list
 494  * of them, and populate the list on rehash/load.
 495  */
 496 class Link : public classbase
 497 {
 498  public:
 499         irc::string Name;
 500         std::string IPAddr;
 501         int Port;
 502         std::string SendPass;
 503         std::string RecvPass;
 504         unsigned long AutoConnect;
 505         time_t NextConnectTime;
 506         std::string EncryptionKey;
 507         bool HiddenFromStats;
 508         irc::string FailOver;
 509 };
 510
 511 void DoFailOver(Link* x);
 512 Link* FindLink(const std::string& name);
 513
 514 /* The usual stuff for inspircd modules,
 515  * plus the vector of Link classes which we
 516  * use to store the <link> tags from the config
 517  * file.
 518  */
 519 ConfigReader *Conf;
 520 std::vector<Link> LinkBlocks;
 521
 522 /** Yay for fast searches!
 523  * This is hundreds of times faster than recursion
 524  * or even scanning a linked list, especially when
 525  * there are more than a few servers to deal with.
 526  * (read as: lots).
 527  */
 528 TreeServer* FindServer(std::string ServerName)
 529 {
 530         server_hash::iterator iter;
 531         iter = serverlist.find(ServerName.c_str());
 532         if (iter != serverlist.end())
 533         {
 534                 return iter->second;
 535         }
 536         else
 537         {
 538                 return NULL;
 539         }
 540 }
 541
 542 /** Returns the locally connected server we must route a
 543  * message through to reach server 'ServerName'. This
 544  * only applies to one-to-one and not one-to-many routing.
 545  * See the comments for the constructor of TreeServer
 546  * for more details.
 547  */
 548 TreeServer* BestRouteTo(std::string ServerName)
 549 {
 550         if (ServerName.c_str() == TreeRoot->GetName())
 551                 return NULL;
 552         TreeServer* Found = FindServer(ServerName);
 553         if (Found)
 554         {
 555                 return Found->GetRoute();
 556         }
 557         else
 558         {
 559                 return NULL;
 560         }
 561 }
 562
 563 /** Find the first server matching a given glob mask.
 564  * Theres no find-using-glob method of hash_map [awwww :-(]
 565  * so instead, we iterate over the list using an iterator
 566  * and match each one until we get a hit. Yes its slow,
 567  * deal with it.
 568  */
 569 TreeServer* FindServerMask(std::string ServerName)
 570 {
 571         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 572         {
 573                 if (match(i->first.c_str(),ServerName.c_str()))
 574                         return i->second;
 575         }
 576         return NULL;
 577 }
 578
 579 /* A convenient wrapper that returns true if a server exists */
 580 bool IsServer(std::string ServerName)
 581 {
 582         return (FindServer(ServerName) != NULL);
 583 }
 584
 585
 586 class cmd_rconnect : public command_t
 587 {
 588         Module* Creator;
 589  public:
 590         cmd_rconnect (InspIRCd* Instance, Module* Callback) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback)
 591         {
 592                 this->source = "m_spanningtree.so";
 593                 syntax = "<remote-server-mask> <servermask>";
 594         }
 595
 596         CmdResult Handle (const char** parameters, int pcnt, userrec *user)
 597         {
 598                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 599                 /* Is this aimed at our server? */
 600                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 601                 {
 602                         /* Yes, initiate the given connect */
 603                         ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 604                         const char* para[1];
 605                         para[0] = parameters[1];
 606                         std::string original_command = std::string("CONNECT ") + parameters[1];
 607                         Creator->OnPreCommand("CONNECT", para, 1, user, true, original_command);
 608
 609                         return CMD_SUCCESS;
 610                 }
 611
 612                 return CMD_FAILURE;
 613         }
 614 };
 615
 616
 617
 618 /** Every SERVER connection inbound or outbound is represented by
 619  * an object of type TreeSocket.
 620  * TreeSockets, being inherited from InspSocket, can be tied into
 621  * the core socket engine, and we cn therefore receive activity events
 622  * for them, just like activex objects on speed. (yes really, that
 623  * is a technical term!) Each of these which relates to a locally
 624  * connected server is assocated with it, by hooking it onto a
 625  * TreeSocket class using its constructor. In this way, we can
 626  * maintain a list of servers, some of which are directly connected,
 627  * some of which are not.
 628  */
 629 class TreeSocket : public InspSocket
 630 {
 631         std::string myhost;
 632         std::string in_buffer;
 633         ServerState LinkState;
 634         std::string InboundServerName;
 635         std::string InboundDescription;
 636         int num_lost_users;
 637         int num_lost_servers;
 638         time_t NextPing;
 639         bool LastPingWasGood;
 640         bool bursting;
 641         AES* ctx_in;
 642         AES* ctx_out;
 643         unsigned int keylength;
 644         std::string ModuleList;
 645         std::map<std::string,std::string> CapKeys;
 646
 647  public:
 648
 649         /** Because most of the I/O gubbins are encapsulated within
 650          * InspSocket, we just call the superclass constructor for
 651          * most of the action, and append a few of our own values
 652          * to it.
 653          */
 654         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime)
 655                 : InspSocket(SI, host, port, listening, maxtime)
 656         {
 657                 myhost = host;
 658                 this->LinkState = LISTENER;
 659                 this->ctx_in = NULL;
 660                 this->ctx_out = NULL;
 661         }
 662
 663         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 664                 : InspSocket(SI, host, port, listening, maxtime)
 665         {
 666                 myhost = ServerName;
 667                 this->LinkState = CONNECTING;
 668                 this->ctx_in = NULL;
 669                 this->ctx_out = NULL;
 670         }
 671
 672         /** When a listening socket gives us a new file descriptor,
 673          * we must associate it with a socket without creating a new
 674          * connection. This constructor is used for this purpose.
 675          */
 676         TreeSocket(InspIRCd* SI, int newfd, char* ip)
 677                 : InspSocket(SI, newfd, ip)
 678         {
 679                 this->LinkState = WAIT_AUTH_1;
 680                 this->ctx_in = NULL;
 681                 this->ctx_out = NULL;
 682                 this->SendCapabilities();
 683         }
 684
 685         ~TreeSocket()
 686         {
 687                 if (ctx_in)
 688                         DELETE(ctx_in);
 689                 if (ctx_out)
 690                         DELETE(ctx_out);
 691         }
 692
 693         void InitAES(std::string key,std::string SName)
 694         {
 695                 if (key == "")
 696                         return;
 697
 698                 ctx_in = new AES();
 699                 ctx_out = new AES();
 700                 Instance->Log(DEBUG,"Initialized AES key %s",key.c_str());
 701                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 702                 keylength = key.length();
 703                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 704                 {
 705                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 706                         Instance->Log(DEBUG,"Key length not 16, 24 or 32 characters!");
 707                 }
 708                 else
 709                 {
 710                         if (this->GetState() != I_ERROR)
 711                         {
 712                                 this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 713                                 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\
 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                                 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\
 716                                         \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);
 717                         }
 718                 }
 719         }
 720
 721         /** When an outbound connection finishes connecting, we receive
 722          * this event, and must send our SERVER string to the other
 723          * side. If the other side is happy, as outlined in the server
 724          * to server docs on the inspircd.org site, the other side
 725          * will then send back its own server string.
 726          */
 727         virtual bool OnConnected()
 728         {
 729                 if (this->LinkState == CONNECTING)
 730                 {
 731                         /* we do not need to change state here. */
 732                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 733                         {
 734                                 if (x->Name == this->myhost)
 735                                 {
 736                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
 737                                         this->SendCapabilities();
 738                                         if (x->EncryptionKey != "")
 739                                         {
 740                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 741                                                 {
 742                                                         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.");
 743                                                 }
 744                                                 else
 745                                                 {
 746                                                         this->WriteLine(std::string("AES ")+this->Instance->Config->ServerName);
 747                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 748                                                 }
 749                                         }
 750                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 751                                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 752                                         return true;
 753                                 }
 754                         }
 755                 }
 756                 /* There is a (remote) chance that between the /CONNECT and the connection
 757                  * being accepted, some muppet has removed the <link> block and rehashed.
 758                  * If that happens the connection hangs here until it's closed. Unlikely
 759                  * and rather harmless.
 760                  */
 761                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 762                 return true;
 763         }
 764
 765         virtual void OnError(InspSocketError e)
 766         {
 767                 /* We don't handle this method, because all our
 768                  * dirty work is done in OnClose() (see below)
 769                  * which is still called on error conditions too.
 770                  */
 771                 if (e == I_ERR_CONNECT)
 772                 {
 773                         this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
 774                         Link* MyLink = FindLink(myhost);
 775                         if (MyLink)
 776                                 DoFailOver(MyLink);
 777                 }
 778         }
 779
 780         virtual int OnDisconnect()
 781         {
 782                 /* For the same reason as above, we don't
 783                  * handle OnDisconnect()
 784                  */
 785                 return true;
 786         }
 787
 788         /** Recursively send the server tree with distances as hops.
 789          * This is used during network burst to inform the other server
 790          * (and any of ITS servers too) of what servers we know about.
 791          * If at any point any of these servers already exist on the other
 792          * end, our connection may be terminated. The hopcounts given
 793          * by this function are relative, this doesn't matter so long as
 794          * they are all >1, as all the remote servers re-calculate them
 795          * to be relative too, with themselves as hop 0.
 796          */
 797         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 798         {
 799                 char command[1024];
 800                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 801                 {
 802                         TreeServer* recursive_server = Current->GetChild(q);
 803                         if (recursive_server != s)
 804                         {
 805                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 806                                 this->WriteLine(command);
 807                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 808                                 /* down to next level */
 809                                 this->SendServers(recursive_server, s, hops+1);
 810                         }
 811                 }
 812         }
 813
 814         std::string MyCapabilities()
 815         {
 816                 std::vector<std::string> modlist;
 817                 std::string capabilities = "";
 818
 819                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 820                 {
 821                         if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
 822                                 modlist.push_back(this->Instance->Config->module_names[i]);
 823                 }
 824                 sort(modlist.begin(),modlist.end());
 825                 for (unsigned int i = 0; i < modlist.size(); i++)
 826                 {
 827                         if (i)
 828                                 capabilities = capabilities + ",";
 829                         capabilities = capabilities + modlist[i];
 830                 }
 831                 return capabilities;
 832         }
 833
 834         void SendCapabilities()
 835         {
 836                 irc::commasepstream modulelist(MyCapabilities());
 837
 838                 this->WriteLine("CAPAB START");
 839
 840                 /* Send module names, split at 509 length */
 841                 std::string item = "*";
 842                 std::string line = "CAPAB MODULES ";
 843                 while ((item = modulelist.GetToken()) != "")
 844                 {
 845                         if (line.length() + item.length() + 1 > 509)
 846                         {
 847                                 this->WriteLine(line);
 848                                 line = "CAPAB MODULES ";
 849                         }
 850
 851                         if (line != "CAPAB MODULES ")
 852                                 line.append(",");
 853
 854                         line.append(item);
 855                 }
 856                 if (line != "CAPAB MODULES ")
 857                         this->WriteLine(line);
 858
 859                 int ip6 = 0;
 860                 int ip6support = 0;
 861 #ifdef IPV6
 862                 ip6 = 1;
 863 #endif
 864 #ifdef SUPPORT_IP6LINKS
 865                 ip6support = 1;
 866 #endif
 867                 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));
 868
 869                 this->WriteLine("CAPAB END");
 870         }
 871
 872         /* Check a comma seperated list for an item */
 873         bool HasItem(const std::string &list, const std::string &item)
 874         {
 875                 irc::commasepstream seplist(list);
 876
 877                 std::string item2 = "*";
 878                 while ((item2 = seplist.GetToken()) != "")
 879                 {
 880                         if (item2 == item)
 881                                 return true;
 882                 }
 883
 884                 return false;
 885         }
 886
 887         /* Isolate and return the elements that are different between two comma seperated lists */
 888         std::string ListDifference(const std::string &one, const std::string &two)
 889         {
 890                 irc::commasepstream list_one(one);
 891                 std::string item = "*";
 892                 std::string result = "";
 893                 while ((item = list_one.GetToken()) != "")
 894                 {
 895                         if (!HasItem(two, item))
 896                         {
 897                                 result.append(" ");
 898                                 result.append(item);
 899                         }
 900                 }
 901                 return result;
 902         }
 903
 904         bool Capab(std::deque<std::string> params)
 905         {
 906                 if (params.size() < 1)
 907                 {
 908                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 909                         return false;
 910                 }
 911
 912                 if (params[0] == "START")
 913                 {
 914                         this->ModuleList = "";
 915                         this->CapKeys.clear();
 916                 }
 917                 else if (params[0] == "END")
 918                 {
 919                         std::string reason = "";
 920                         int ip6support = 0;
 921 #ifdef SUPPORT_IP6LINKS
 922                         ip6support = 1;
 923 #endif
 924                         /* Compare ModuleList and check CapKeys...
 925                          * Maybe this could be tidier? -- Brain
 926                          */
 927                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 928                         {
 929                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 930                                 if (!diff.length())
 931                                 {
 932                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 933                                 }
 934                                 else
 935                                 {
 936                                         diff = "this server:" + diff;
 937                                 }
 938                                 if (diff.length() == 12)
 939                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 940                                 else
 941                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 942                         }
 943
 944                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 945                                 reason = "We don't both support linking to IPV6 servers";
 946
 947                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 948                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 949
 950                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 951                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 952
 953                         if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
 954                         {
 955                                 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
 956                                 {
 957                                         reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
 958                                 }
 959                                 else
 960                                 {
 961                                         reason = "Protocol version not specified";
 962                                 }
 963                         }
 964
 965                         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))))
 966                                 reason = "We don't both have halfop support enabled/disabled identically";
 967
 968                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 969                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 970
 971                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 972                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 973
 974                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 975                                 reason = "Maximum modes per line differ or remote modes per line not specified";
 976
 977                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 978                                 reason = "Maximum quit lengths differ or remote quit length not specified";
 979
 980                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 981                                 reason = "Maximum topic lengths differ or remote topic length not specified";
 982
 983                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
 984                                 reason = "Maximum kick lengths differ or remote kick length not specified";
 985
 986                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
 987                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
 988
 989                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
 990                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
 991
 992                         if (reason.length())
 993                         {
 994                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
 995                                 return false;
 996                         }
 997                 }
 998                 else if ((params[0] == "MODULES") && (params.size() == 2))
 999                 {
1000                         if (!this->ModuleList.length())
1001                         {
1002                                 this->ModuleList.append(params[1]);
1003                         }
1004                         else
1005                         {
1006                                 this->ModuleList.append(",");
1007                                 this->ModuleList.append(params[1]);
1008                         }
1009                 }
1010                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
1011                 {
1012                         irc::tokenstream capabs(params[1]);
1013                         std::string item = "*";
1014                         while ((item = capabs.GetToken()) != "")
1015                         {
1016                                 /* Process each key/value pair */
1017                                 std::string::size_type equals = item.rfind('=');
1018                                 if (equals != std::string::npos)
1019                                 {
1020                                         std::string var = item.substr(0, equals);
1021                                         std::string value = item.substr(equals+1, item.length());
1022                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1023                                         CapKeys[var] = value;
1024                                 }
1025                         }
1026                 }
1027
1028                 return true;
1029         }
1030
1031         /** This function forces this server to quit, removing this server
1032          * and any users on it (and servers and users below that, etc etc).
1033          * It's very slow and pretty clunky, but luckily unless your network
1034          * is having a REAL bad hair day, this function shouldnt be called
1035          * too many times a month ;-)
1036          */
1037         void SquitServer(std::string &from, TreeServer* Current)
1038         {
1039                 /* recursively squit the servers attached to 'Current'.
1040                  * We're going backwards so we don't remove users
1041                  * while we still need them ;)
1042                  */
1043                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1044                 {
1045                         TreeServer* recursive_server = Current->GetChild(q);
1046                         this->SquitServer(from,recursive_server);
1047                 }
1048                 /* Now we've whacked the kids, whack self */
1049                 num_lost_servers++;
1050                 num_lost_users += Current->QuitUsers(from);
1051         }
1052
1053         /** This is a wrapper function for SquitServer above, which
1054          * does some validation first and passes on the SQUIT to all
1055          * other remaining servers.
1056          */
1057         void Squit(TreeServer* Current,std::string reason)
1058         {
1059                 if ((Current) && (Current != TreeRoot))
1060                 {
1061                         std::deque<std::string> params;
1062                         params.push_back(Current->GetName());
1063                         params.push_back(":"+reason);
1064                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1065                         if (Current->GetParent() == TreeRoot)
1066                         {
1067                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1068                         }
1069                         else
1070                         {
1071                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1072                         }
1073                         num_lost_servers = 0;
1074                         num_lost_users = 0;
1075                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1076                         SquitServer(from, Current);
1077                         Current->Tidy();
1078                         Current->GetParent()->DelChild(Current);
1079                         DELETE(Current);
1080                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1081                 }
1082                 else
1083                 {
1084                         Instance->Log(DEFAULT,"Squit from unknown server");
1085                 }
1086         }
1087
1088         /** FMODE command - server mode with timestamp checks */
1089         bool ForceMode(std::string source, std::deque<std::string> &params)
1090         {
1091                 /* Chances are this is a 1.0 FMODE without TS */
1092                 if (params.size() < 3)
1093                 {
1094                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
1095                         return false;
1096                 }
1097
1098                 bool smode = false;
1099                 std::string sourceserv;
1100
1101                 /* Are we dealing with an FMODE from a user, or from a server? */
1102                 userrec* who = this->Instance->FindNick(source);
1103                 if (who)
1104                 {
1105                         /* FMODE from a user, set sourceserv to the users server name */
1106                         sourceserv = who->server;
1107                 }
1108                 else
1109                 {
1110                         /* FMODE from a server, create a fake user to receive mode feedback */
1111                         who = new userrec(this->Instance);
1112                         who->SetFd(FD_MAGIC_NUMBER);
1113                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1114                         sourceserv = source;    /* Set sourceserv to the actual source string */
1115                 }
1116                 const char* modelist[64];
1117                 time_t TS = 0;
1118                 int n = 0;
1119                 memset(&modelist,0,sizeof(modelist));
1120                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1121                 {
1122                         if (q == 1)
1123                         {
1124                                 /* The timestamp is in this position.
1125                                  * We don't want to pass that up to the
1126                                  * server->client protocol!
1127                                  */
1128                                 TS = atoi(params[q].c_str());
1129                         }
1130                         else
1131                         {
1132                                 /* Everything else is fine to append to the modelist */
1133                                 modelist[n++] = params[q].c_str();
1134                         }
1135
1136                 }
1137                 /* Extract the TS value of the object, either userrec or chanrec */
1138                 userrec* dst = this->Instance->FindNick(params[0]);
1139                 chanrec* chan = NULL;
1140                 time_t ourTS = 0;
1141                 if (dst)
1142                 {
1143                         ourTS = dst->age;
1144                 }
1145                 else
1146                 {
1147                         chan = this->Instance->FindChan(params[0]);
1148                         if (chan)
1149                         {
1150                                 ourTS = chan->age;
1151                         }
1152                         else
1153                                 /* Oops, channel doesnt exist! */
1154                                 return true;
1155                 }
1156
1157                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1158                  * with parameters.
1159                  */
1160                 if (TS == ourTS)
1161                 {
1162                         Instance->Log(DEBUG,"Entering TS equality check");
1163                         ModeHandler* mh = NULL;
1164                         unsigned long paramptr = 3;
1165                         std::string to_bounce = "";
1166                         std::string to_keep = "";
1167                         std::vector<std::string> params_to_keep;
1168                         std::string params_to_bounce = "";
1169                         bool adding = true;
1170                         char cur_change = 1;
1171                         char old_change = 0;
1172                         char old_bounce_change = 0;
1173                         /* Merge modes, basically do special stuff to mode with params */
1174                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1175                         {
1176                                 switch (*x)
1177                                 {
1178                                         case '-':
1179                                                 adding = false;
1180                                         break;
1181                                         case '+':
1182                                                 adding = true;
1183                                         break;
1184                                         default:
1185                                                 if (adding)
1186                                                 {
1187                                                         /* We only care about whats being set,
1188                                                          * not whats being unset
1189                                                          */
1190                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1191
1192                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1193                                                         {
1194                                                                 /* We only want to do special things to
1195                                                                  * modes with parameters, we are going to rewrite
1196                                                                  * those parameters
1197                                                                  */
1198                                                                 ModePair ret;
1199                                                                 adding ? cur_change = '+' : cur_change = '-';
1200
1201                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1202
1203                                                                 /* The mode is set here, check which we should keep */
1204                                                                 if (ret.first)
1205                                                                 {
1206                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1207
1208                                                                         if (which_to_keep == true)
1209                                                                         {
1210                                                                                 /* Keep ours, bounce theirs:
1211                                                                                  * Send back ours to them and
1212                                                                                  * drop their mode changs
1213                                                                                  */
1214                                                                                 adding ? cur_change = '+' : cur_change = '-';
1215                                                                                 if (cur_change != old_bounce_change)
1216                                                                                         to_bounce += cur_change;
1217                                                                                 to_bounce += *x;
1218                                                                                 old_bounce_change = cur_change;
1219
1220                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1221                                                                                         params_to_bounce.append(" ").append(ret.second);
1222                                                                         }
1223                                                                         else
1224                                                                         {
1225                                                                                 /* Keep theirs: Accept their mode change,
1226                                                                                  * do nothing else
1227                                                                                  */
1228                                                                                 adding ? cur_change = '+' : cur_change = '-';
1229                                                                                 if (cur_change != old_change)
1230                                                                                         to_keep += cur_change;
1231                                                                                 to_keep += *x;
1232                                                                                 old_change = cur_change;
1233
1234                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1235                                                                                         params_to_keep.push_back(params[paramptr]);
1236                                                                         }
1237                                                                 }
1238                                                                 else
1239                                                                 {
1240                                                                         /* Mode isnt set here, we want it */
1241                                                                         adding ? cur_change = '+' : cur_change = '-';
1242                                                                         if (cur_change != old_change)
1243                                                                                 to_keep += cur_change;
1244                                                                         to_keep += *x;
1245                                                                         old_change = cur_change;
1246
1247                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1248                                                                                 params_to_keep.push_back(params[paramptr]);
1249                                                                 }
1250
1251                                                                 paramptr++;
1252                                                         }
1253                                                         else
1254                                                         {
1255                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1256
1257                                                                 if (mh)
1258                                                                 {
1259                                                                         adding ? cur_change = '+' : cur_change = '-';
1260
1261                                                                         /* Just keep this, safe to merge with no checks
1262                                                                          * it has no parameters
1263                                                                          */
1264
1265                                                                         if (cur_change != old_change)
1266                                                                                 to_keep += cur_change;
1267                                                                         to_keep += *x;
1268                                                                         old_change = cur_change;
1269
1270                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1271                                                                         {
1272                                                                                 Instance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1273                                                                                 params_to_keep.push_back(params[paramptr++]);
1274                                                                         }
1275                                                                 }
1276                                                         }
1277                                                 }
1278                                                 else
1279                                                 {
1280                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1281
1282                                                         if (mh)
1283                                                         {
1284                                                                 /* Taking a mode away */
1285                                                                 adding ? cur_change = '+' : cur_change = '-';
1286
1287                                                                 if (cur_change != old_change)
1288                                                                         to_keep += cur_change;
1289                                                                 to_keep += *x;
1290                                                                 old_change = cur_change;
1291
1292                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1293                                                                         params_to_keep.push_back(params[paramptr++]);
1294                                                         }
1295                                                 }
1296                                         break;
1297                                 }
1298                         }
1299
1300                         if (to_bounce.length())
1301                         {
1302                                 std::deque<std::string> newparams;
1303                                 newparams.push_back(params[0]);
1304                                 newparams.push_back(ConvToStr(ourTS));
1305                                 newparams.push_back(to_bounce+params_to_bounce);
1306                                 Instance->Log(DEBUG,"BOUNCE BACK: %s",(to_bounce+params_to_bounce).c_str());
1307                                 DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1308                         }
1309
1310                         if (to_keep.length())
1311                         {
1312                                 unsigned int n = 2;
1313                                 unsigned int q = 0;
1314                                 modelist[0] = params[0].c_str();
1315                                 modelist[1] = to_keep.c_str();
1316
1317                                 if (params_to_keep.size() > 0)
1318                                 {
1319                                         for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
1320                                         {
1321                                                 Instance->Log(DEBUG,"KEEP Item %d of %d: %s", q, params_to_keep.size(), params_to_keep[q].c_str());
1322                                                 modelist[n++] = params_to_keep[q].c_str();
1323                                         }
1324                                 }
1325
1326                                 if (smode)
1327                                 {
1328                                         Instance->Log(DEBUG,"Send mode");
1329                                         this->Instance->SendMode(modelist, n, who);
1330                                 }
1331                                 else
1332                                 {
1333                                         Instance->Log(DEBUG,"Send mode client");
1334                                         this->Instance->CallCommandHandler("MODE", modelist, n, who);
1335                                 }
1336
1337                                 /* HOT POTATO! PASS IT ON! */
1338                                 DoOneToAllButSender(source,"FMODE",params,sourceserv);
1339                         }
1340                 }
1341                 else
1342                 /* U-lined servers always win regardless of their TS */
1343                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1344                 {
1345                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1346                          * SHOULD accept it, if its clock is right.
1347                          *
1348                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1349                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1350                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1351                          *
1352                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1353                          * writing the code. It took me a while to come up with this solution.
1354                          *
1355                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1356                          */
1357
1358                         std::deque<std::string> newparams;      /* New parameter list we send back */
1359                         newparams.push_back(params[0]);         /* Target, user or channel */
1360                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1361                         newparams.push_back("");                /* This contains the mode string. For now
1362                                                                  * it's empty, we fill it below.
1363                                                                  */
1364
1365                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1366                          * set to avoid a desync here.
1367                          */
1368                         std::string modebounce = "";
1369                         bool adding = true;
1370                         unsigned int t = 3;
1371                         ModeHandler* mh = NULL;
1372                         char cur_change = 1;
1373                         char old_change = 0;
1374                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1375                         {
1376                                 /* Iterate over all mode chars in the sent set */
1377                                 switch (*x)
1378                                 {
1379                                         /* Adding or subtracting modes? */
1380                                         case '-':
1381                                                 adding = false;
1382                                         break;
1383                                         case '+':
1384                                                 adding = true;
1385                                         break;
1386                                         default:
1387                                                 /* Find the mode handler for this mode */
1388                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1389
1390                                                 /* Got a mode handler?
1391                                                  * This also prevents us bouncing modes we have no handler for.
1392                                                  */
1393                                                 if (mh)
1394                                                 {
1395                                                         ModePair ret;
1396                                                         std::string p = "";
1397
1398                                                         /* Does the mode require a parameter right now?
1399                                                          * If it does, fetch it if we can
1400                                                          */
1401                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1402                                                                 p = params[t++];
1403
1404                                                         /* Call the ModeSet method to determine if its set with the
1405                                                          * given parameter here or not.
1406                                                          */
1407                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1408
1409                                                         /* XXX: Really. Dont ask.
1410                                                          * Determine from if its set combined with what the current
1411                                                          * 'state' is (adding or not) as to wether we should 'invert'
1412                                                          * or 'reinforce' the mode change
1413                                                          */
1414                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1415
1416                                                         /* Quickly determine if we have 'flipped' from + to -,
1417                                                          * or - to +, to prevent unneccessary +/- chars in the
1418                                                          * output string that waste bandwidth
1419                                                          */
1420                                                         if (cur_change != old_change)
1421                                                                 modebounce += cur_change;
1422                                                         old_change = cur_change;
1423
1424                                                         /* Add the mode character to the output string */
1425                                                         modebounce += mh->GetModeChar();
1426
1427                                                         /* We got a parameter back from ModeHandler::ModeSet,
1428                                                          * are we supposed to be sending one out right now?
1429                                                          */
1430                                                         if (ret.second.length())
1431                                                         {
1432                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1433                                                                         /* Yes we're supposed to be sending out
1434                                                                          * the parameter. Make sure it goes
1435                                                                          */
1436                                                                         newparams.push_back(ret.second);
1437                                                         }
1438
1439                                                 }
1440                                         break;
1441                                 }
1442                         }
1443
1444                         /* Update the parameters for FMODE with the new 'bounced' string */
1445                         newparams[2] = modebounce;
1446                         /* Only send it back the way it came, no need to send it anywhere else */
1447                         DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1448                         Instance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1449                 }
1450                 else
1451                 {
1452                         Instance->Log(DEBUG,"Allow modes, TS lower for sender");
1453                         /* The server was ulined, but something iffy is up with the TS.
1454                          * Sound the alarm bells!
1455                          */
1456                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1457                         {
1458                                 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());
1459                         }
1460                         /* Allow the mode, route it to either server or user command handling */
1461                         if (smode)
1462                                 this->Instance->SendMode(modelist,n,who);
1463                         else
1464                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1465
1466                         /* HOT POTATO! PASS IT ON! */
1467                         DoOneToAllButSender(source,"FMODE",params,sourceserv);
1468                 }
1469                 /* Are we supposed to free the userrec? */
1470                 if (smode)
1471                         DELETE(who);
1472
1473                 return true;
1474         }
1475
1476         /** FTOPIC command */
1477         bool ForceTopic(std::string source, std::deque<std::string> &params)
1478         {
1479                 if (params.size() != 4)
1480                         return true;
1481                 time_t ts = atoi(params[1].c_str());
1482                 std::string nsource = source;
1483
1484                 chanrec* c = this->Instance->FindChan(params[0]);
1485                 if (c)
1486                 {
1487                         if ((ts >= c->topicset) || (!*c->topic))
1488                         {
1489                                 std::string oldtopic = c->topic;
1490                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1491                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1492                                 c->topicset = ts;
1493                                 /* if the topic text is the same as the current topic,
1494                                  * dont bother to send the TOPIC command out, just silently
1495                                  * update the set time and set nick.
1496                                  */
1497                                 if (oldtopic != params[3])
1498                                 {
1499                                         userrec* user = this->Instance->FindNick(source);
1500                                         if (!user)
1501                                         {
1502                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1503                                         }
1504                                         else
1505                                         {
1506                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1507                                                 nsource = user->server;
1508                                         }
1509                                         /* all done, send it on its way */
1510                                         params[3] = ":" + params[3];
1511                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
1512                                 }
1513                         }
1514
1515                 }
1516
1517                 return true;
1518         }
1519
1520         /** FJOIN, similar to TS6 SJOIN, but not quite. */
1521         bool ForceJoin(std::string source, std::deque<std::string> &params)
1522         {
1523                 /* 1.1 FJOIN works as follows:
1524                  *
1525                  * Each FJOIN is sent along with a timestamp, and the side with the lowest
1526                  * timestamp 'wins'. From this point on we will refer to this side as the
1527                  * winner. The side with the higher timestamp loses, from this point on we
1528                  * will call this side the loser or losing side. This should be familiar to
1529                  * anyone who's dealt with dreamforge or TS6 before.
1530                  *
1531                  * When two sides of a split heal and this occurs, the following things
1532                  * will happen:
1533                  *
1534                  * If the timestamps are exactly equal, both sides merge their privilages
1535                  * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
1536                  * re-created during a split, this is safe to do.
1537                  *
1538                  *
1539                  * If the timestamps are NOT equal, the losing side removes all privilage
1540                  * modes from all of its users that currently exist in the channel, before
1541                  * introducing new users into the channel which are listed in the FJOIN
1542                  * command's parameters. This means, all modes +ohv, and privilages added
1543                  * by modules, such as +qa. The losing side then LOWERS its timestamp value
1544                  * of the channel to match that of the winning side, and the modes of the
1545                  * users of the winning side are merged in with the losing side. The loser
1546                  * then sends out a set of FMODE commands which 'confirm' that it just
1547                  * removed all privilage modes from its existing users, which allows for
1548                  * services packages to still work correctly without needing to know the
1549                  * timestamping rules which InspIRCd follows. In TS6 servers this is always
1550                  * a problem, and services packages must contain code which explicitly
1551                  * behaves as TS6 does, removing ops from the losing side of a split where
1552                  * neccessary within its internal records, as this state information is
1553                  * not explicitly echoed out in that protocol.
1554                  *
1555                  * The winning side on the other hand will ignore all user modes from the
1556                  * losing side, so only its own modes get applied. Life is simple for those
1557                  * who succeed at internets. :-)
1558                  *
1559                  * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
1560                  * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
1561                  * you ask? Well, quite simply because we don't need to. They'll be sent
1562                  * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
1563                  * the losing side sends any modes for the channel which shouldnt win,
1564                  * they wont as their timestamp will be too high :-)
1565                  */
1566
1567                 if (params.size() < 3)
1568                         return true;
1569
1570                 char first[MAXBUF];             /* The first parameter of the mode command */
1571                 char modestring[MAXBUF];        /* The mode sequence (2nd parameter) of the mode command */
1572                 char* mode_users[127];          /* The values used by the mode command */
1573                 memset(&mode_users,0,sizeof(mode_users));       /* Initialize mode parameters */
1574                 mode_users[0] = first;          /* Set this up to be our on-stack value */
1575                 mode_users[1] = modestring;     /* Same here as above */
1576                 strcpy(modestring,"+");         /* Initialize the mode sequence to just '+' */
1577                 unsigned int modectr = 2;       /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */
1578
1579                 userrec* who = NULL;                    /* User we are currently checking */
1580                 std::string channel = params[0];        /* Channel name, as a string */
1581                 time_t TS = atoi(params[1].c_str());    /* Timestamp given to us for remote side */
1582
1583                 /* Try and find the channel */
1584                 chanrec* chan = this->Instance->FindChan(channel);
1585
1586                 /* Initialize channel name in the mode parameters */
1587                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1588
1589                 /* default TS is a high value, which if we dont have this
1590                  * channel will let the other side apply their modes.
1591                  */
1592                 time_t ourTS = time(NULL)+600;
1593
1594                 /* Does this channel exist? if it does, get its REAL timestamp */
1595                 if (chan)
1596                         ourTS = chan->age;
1597
1598                 /* In 1.1, if they have the newer channel, we immediately clear
1599                  * all status modes from our users. We then accept their modes.
1600                  * If WE have the newer channel its the other side's job to do this.
1601                  * Note that this causes the losing server to send out confirming
1602                  * FMODE lines.
1603                  */
1604                 if (ourTS > TS)
1605                 {
1606                         std::deque<std::string> param_list;
1607
1608                         if (chan)
1609                                 chan->age = TS;
1610
1611                         /* Lower the TS here */
1612                         if (AnnounceTSChange && chan)
1613                                 chan->WriteChannelWithServ(Instance->Config->ServerName,
1614                                 "TS for %s changed from %lu to %lu", chan->name, ourTS, TS);
1615                         ourTS = TS;
1616
1617                         param_list.push_back(channel);
1618                         /* Zap all the privilage modes on our side */
1619                         this->RemoveStatus(Instance->Config->ServerName, param_list);
1620                 }
1621
1622                 /* Put the final parameter of the FJOIN into a tokenstream ready to split it */
1623                 irc::tokenstream users(params[2]);
1624                 std::string item = "*";
1625
1626                 /* do this first, so our mode reversals are correctly received by other servers
1627                  * if there is a TS collision.
1628                  */
1629                 params[2] = ":" + params[2];
1630                 DoOneToAllButSender(source,"FJOIN",params,source);
1631
1632                 /* Now, process every 'prefixes,nick' pair */
1633                 while (item != "")
1634                 {
1635                         /* Find next user */
1636                         item = users.GetToken();
1637
1638                         const char* usr = item.c_str();
1639
1640                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1641                          * (is this even possible?) */
1642                         if (usr && *usr)
1643                         {
1644                                 const char* permissions = usr;
1645                                 int ntimes = 0;
1646                                 char* nm = new char[MAXBUF];
1647                                 char* tnm = nm;
1648
1649                                 /* Iterate through all the prefix values, convert them from prefixes
1650                                  * to mode letters, and append them to the mode sequence
1651                                  */
1652                                 while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
1653                                 {
1654                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1655                                         if (mh)
1656                                         {
1657                                                 /* This is a valid prefix */
1658                                                 ntimes++;
1659                                                 *tnm++ = mh->GetModeChar();
1660                                         }
1661                                         else
1662                                         {
1663                                                 /* Not a valid prefix...
1664                                                  * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
1665                                                  */
1666                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
1667                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
1668                                                 return false;
1669                                         }
1670                                         usr++;
1671                                         permissions++;
1672                                 }
1673
1674                                 /* Null terminate modes */
1675                                 *tnm = 0;
1676                                 /* Advance past the comma, to the nick */
1677                                 usr++;
1678
1679                                 /* Check the user actually exists */
1680                                 who = this->Instance->FindNick(usr);
1681                                 if (who)
1682                                 {
1683                                         /* Did they get any modes? How many times? */
1684                                         strlcat(modestring, nm, MAXBUF);
1685                                         for (int k = 0; k < ntimes; k++)
1686                                                 mode_users[modectr++] = strdup(usr);
1687
1688                                         /* Free temporary buffer used for mode sequence */
1689                                         delete[] nm;
1690
1691                                         /* Check that the user's 'direction' is correct
1692                                          * based on the server sending the FJOIN. We must
1693                                          * check each nickname in turn, because the origin of
1694                                          * the FJOIN may be different to the origin of the nicks
1695                                          * in the command itself.
1696                                          */
1697                                         TreeServer* route_back_again = BestRouteTo(who->server);
1698                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
1699                                         {
1700                                                 /* Oh dear oh dear. */
1701                                                 Instance->Log(DEBUG,"Fake direction in FJOIN, user '%s'",who->nick);
1702                                                 continue;
1703                                         }
1704                                         /* Finally, we can actually place the user into the channel.
1705                                          * We're sure its right. Final answer, phone a friend.
1706                                          */
1707                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
1708
1709                                         /* Have we already queued up MAXMODES modes with parameters
1710                                          * (+qaohv) ready to be sent to the server?
1711                                          */
1712                                         if (modectr >= (MAXMODES-1))
1713                                         {
1714                                                 /* Only actually give the users any status if we lost
1715                                                  * the FJOIN or drew (equal timestamps).
1716                                                  * It isn't actually possible for ourTS to be > TS here,
1717                                                  * only possible to actually have ourTS == TS, or
1718                                                  * ourTS < TS, because if we lost, we already lowered
1719                                                  * our TS above before we entered this loop. We only
1720                                                  * check >= as a safety measure, in case someone stuffed
1721                                                  * up. If someone DID stuff up, it was most likely me.
1722                                                  * Note: I do not like baseball bats in the face...
1723                                                  */
1724                                                 if (ourTS >= TS)
1725                                                 {
1726                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1727                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1728
1729                                                         /* Something stuffed up, and for some reason, the timestamp is
1730                                                          * NOT lowered right now and should be. Lower it. Usually this
1731                                                          * code won't be executed, doubtless someone will remove it some
1732                                                          * day soon.
1733                                                          */
1734                                                         if (ourTS > TS)
1735                                                         {
1736                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1737                                                                 chan->age = TS;
1738                                                                 ourTS = TS;
1739                                                         }
1740                                                 }
1741
1742                                                 /* Reset all this back to defaults, and
1743                                                  * free any ram we have left allocated.
1744                                                  */
1745                                                 strcpy(mode_users[1],"+");
1746                                                 for (unsigned int f = 2; f < modectr; f++)
1747                                                         free(mode_users[f]);
1748                                                 modectr = 2;
1749                                         }
1750                                 }
1751                                 else
1752                                 {
1753                                         /* Remember to free this */
1754                                         delete[] nm;
1755                                         /* If we got here, there's a nick in FJOIN which doesnt exist on this server.
1756                                          * We don't try to process the nickname here (that WOULD cause a segfault because
1757                                          * we'd be playing with null pointers) however, we DO pass the nickname on, just
1758                                          * in case somehow we're desynched, so that other users which might be able to see
1759                                          * the nickname get their fair chance to process it.
1760                                          */
1761                                         Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
1762                                         continue;
1763                                 }
1764                         }
1765                 }
1766
1767                 /* there werent enough modes built up to flush it during FJOIN,
1768                  * or, there are a number left over. flush them out.
1769                  */
1770                 if ((modectr > 2) && (who) && (chan))
1771                 {
1772                         if (ourTS >= TS)
1773                         {
1774                                 /* Our channel is newer than theirs. Evil deeds must be afoot. */
1775                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1776                                 /* Yet again, we can't actually get a true value here, if everything else
1777                                  * is working as it should.
1778                                  */
1779                                 if (ourTS > TS)
1780                                 {
1781                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1782                                         chan->age = TS;
1783                                         ourTS = TS;
1784                                 }
1785                         }
1786
1787                         /* Free anything we have left to free */
1788                         for (unsigned int f = 2; f < modectr; f++)
1789                                 free(mode_users[f]);
1790                 }
1791
1792                 /* All done. That wasnt so bad was it, you can wipe
1793                  * the sweat from your forehead now. :-)
1794                  */
1795                 return true;
1796         }
1797
1798         /** NICK command */
1799         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1800         {
1801                 if (params.size() < 8)
1802                         return true;
1803                 if (params.size() > 8)
1804                 {
1805                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1806                         return true;
1807                 }
1808                 // NICK age nick host dhost ident +modes ip :gecos
1809                 //       0    1   2     3     4      5   6     7
1810                 time_t age = atoi(params[0].c_str());
1811
1812                 /* This used to have a pretty craq'y loop doing the same thing,
1813                  * now we just let the STL do the hard work (more efficiently)
1814                  */
1815                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1816                 if (pos_after_plus != std::string::npos)
1817                         params[5] = params[5].substr(pos_after_plus);
1818
1819                 const char* tempnick = params[1].c_str();
1820                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1821
1822                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1823
1824                 if (iter != this->Instance->clientlist.end())
1825                 {
1826                         // nick collision
1827                         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);
1828                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1829                         userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
1830                         return true;
1831                 }
1832
1833                 userrec* _new = new userrec(this->Instance);
1834                 this->Instance->clientlist[tempnick] = _new;
1835                 _new->SetFd(FD_MAGIC_NUMBER);
1836                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1837                 strlcpy(_new->host, params[2].c_str(),63);
1838                 strlcpy(_new->dhost, params[3].c_str(),63);
1839                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1840                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1841                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1842                 _new->registered = REG_ALL;
1843                 _new->signon = age;
1844
1845                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1846                         _new->modes[(*v)-65] = 1;
1847
1848 #ifdef SUPPORT_IP6LINKS
1849                 if (params[6].find_first_of(":") != std::string::npos)
1850                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1851                 else
1852 #endif
1853                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1854
1855                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1856
1857                 params[7] = ":" + params[7];
1858                 DoOneToAllButSender(source,"NICK",params,source);
1859
1860                 // Increment the Source Servers User Count..
1861                 TreeServer* SourceServer = FindServer(source);
1862                 if (SourceServer)
1863                 {
1864                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1865                         SourceServer->AddUserCount();
1866                 }
1867
1868                 FOREACH_MOD(I_OnPostConnect,OnPostConnect(_new));
1869
1870                 return true;
1871         }
1872
1873         /** Send one or more FJOINs for a channel of users.
1874          * If the length of a single line is more than 480-NICKMAX
1875          * in length, it is split over multiple lines.
1876          */
1877         void SendFJoins(TreeServer* Current, chanrec* c)
1878         {
1879                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1880                 char list[MAXBUF];
1881                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1882
1883                 size_t dlen, curlen;
1884                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1885                 int numusers = 0;
1886                 char* ptr = list + dlen;
1887
1888                 CUList *ulist = c->GetUsers();
1889                 std::vector<userrec*> specific_halfop;
1890                 std::vector<userrec*> specific_voice;
1891                 std::string modes = "";
1892                 std::string params = "";
1893
1894                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1895                 {
1896                         // The first parameter gets a : before it
1897                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1898
1899                         curlen += ptrlen;
1900                         ptr += ptrlen;
1901
1902                         numusers++;
1903
1904                         if (curlen > (480-NICKMAX))
1905                         {
1906                                 this->WriteLine(list);
1907                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1908                                 ptr = list + dlen;
1909                                 ptrlen = 0;
1910                                 numusers = 0;
1911                         }
1912                 }
1913
1914                 if (numusers)
1915                         this->WriteLine(list);
1916
1917                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1918                 {
1919                         modes.append("b");
1920                         params.append(b->data).append(" ");
1921                 }
1922                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1923         }
1924
1925         /** Send G, Q, Z and E lines */
1926         void SendXLines(TreeServer* Current)
1927         {
1928                 char data[MAXBUF];
1929                 std::string n = this->Instance->Config->ServerName;
1930                 const char* sn = n.c_str();
1931                 int iterations = 0;
1932                 /* Yes, these arent too nice looking, but they get the job done */
1933                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1934                 {
1935                         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);
1936                         this->WriteLine(data);
1937                 }
1938                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1939                 {
1940                         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);
1941                         this->WriteLine(data);
1942                 }
1943                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1944                 {
1945                         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);
1946                         this->WriteLine(data);
1947                 }
1948                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1949                 {
1950                         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);
1951                         this->WriteLine(data);
1952                 }
1953                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1954                 {
1955                         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);
1956                         this->WriteLine(data);
1957                 }
1958                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1959                 {
1960                         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);
1961                         this->WriteLine(data);
1962                 }
1963                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1964                 {
1965                         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);
1966                         this->WriteLine(data);
1967                 }
1968                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1969                 {
1970                         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);
1971                         this->WriteLine(data);
1972                 }
1973         }
1974
1975         /** Send channel modes and topics */
1976         void SendChannelModes(TreeServer* Current)
1977         {
1978                 char data[MAXBUF];
1979                 std::deque<std::string> list;
1980                 int iterations = 0;
1981                 std::string n = this->Instance->Config->ServerName;
1982                 const char* sn = n.c_str();
1983                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1984                 {
1985                         SendFJoins(Current, c->second);
1986                         if (*c->second->topic)
1987                         {
1988                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1989                                 this->WriteLine(data);
1990                         }
1991                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1992                         list.clear();
1993                         c->second->GetExtList(list);
1994                         for (unsigned int j = 0; j < list.size(); j++)
1995                         {
1996                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1997                         }
1998                 }
1999         }
2000
2001         /** send all users and their oper state/modes */
2002         void SendUsers(TreeServer* Current)
2003         {
2004                 char data[MAXBUF];
2005                 std::deque<std::string> list;
2006                 int iterations = 0;
2007                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
2008                 {
2009                         if (u->second->registered == REG_ALL)
2010                         {
2011                                 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);
2012                                 this->WriteLine(data);
2013                                 if (*u->second->oper)
2014                                 {
2015                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
2016                                 }
2017                                 if (*u->second->awaymsg)
2018                                 {
2019                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
2020                                 }
2021                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
2022                                 list.clear();
2023                                 u->second->GetExtList(list);
2024                                 for (unsigned int j = 0; j < list.size(); j++)
2025                                 {
2026                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
2027                                 }
2028                         }
2029                 }
2030         }
2031
2032         /** This function is called when we want to send a netburst to a local
2033          * server. There is a set order we must do this, because for example
2034          * users require their servers to exist, and channels require their
2035          * users to exist. You get the idea.
2036          */
2037         void DoBurst(TreeServer* s)
2038         {
2039                 std::string burst = "BURST "+ConvToStr(time(NULL));
2040                 std::string endburst = "ENDBURST";
2041                 // Because by the end of the netburst, it  could be gone!
2042                 std::string name = s->GetName();
2043                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
2044                 this->WriteLine(burst);
2045                 /* send our version string */
2046                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
2047                 /* Send server tree */
2048                 this->SendServers(TreeRoot,s,1);
2049                 /* Send users and their oper status */
2050                 this->SendUsers(s);
2051                 /* Send everything else (channel modes, xlines etc) */
2052                 this->SendChannelModes(s);
2053                 this->SendXLines(s);
2054                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
2055                 this->WriteLine(endburst);
2056                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
2057         }
2058
2059         /** This function is called when we receive data from a remote
2060          * server. We buffer the data in a std::string (it doesnt stay
2061          * there for long), reading using InspSocket::Read() which can
2062          * read up to 16 kilobytes in one operation.
2063          *
2064          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
2065          * THE SOCKET OBJECT FOR US.
2066          */
2067         virtual bool OnDataReady()
2068         {
2069                 char* data = this->Read();
2070                 /* Check that the data read is a valid pointer and it has some content */
2071                 if (data && *data)
2072                 {
2073                         this->in_buffer.append(data);
2074                         /* While there is at least one new line in the buffer,
2075                          * do something useful (we hope!) with it.
2076                          */
2077                         while (in_buffer.find("\n") != std::string::npos)
2078                         {
2079                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
2080                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
2081                                 if (ret.find("\r") != std::string::npos)
2082                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
2083                                 /* Process this one, abort if it
2084                                  * didnt return true.
2085                                  */
2086                                 if (this->ctx_in)
2087                                 {
2088                                         char out[1024];
2089                                         char result[1024];
2090                                         memset(result,0,1024);
2091                                         memset(out,0,1024);
2092                                         Instance->Log(DEBUG,"Original string '%s'",ret.c_str());
2093                                         /* ERROR + CAPAB is still allowed unencryped */
2094                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
2095                                         {
2096                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
2097                                                 if ((nbytes > 0) && (nbytes < 1024))
2098                                                 {
2099                                                         Instance->Log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
2100                                                         ctx_in->Decrypt(out, result, nbytes, 0);
2101                                                         for (int t = 0; t < nbytes; t++)
2102                                                                 if (result[t] == '\7') result[t] = 0;
2103                                                         ret = result;
2104                                                 }
2105                                         }
2106                                 }
2107                                 if (!this->ProcessLine(ret))
2108                                 {
2109                                         Instance->Log(DEBUG,"ProcessLine says no!");
2110                                         return false;
2111                                 }
2112                         }
2113                         return true;
2114                 }
2115                 /* EAGAIN returns an empty but non-NULL string, so this
2116                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2117                  */
2118                 return (data && !*data);
2119         }
2120
2121         int WriteLine(std::string line)
2122         {
2123                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2124                 if (this->ctx_out)
2125                 {
2126                         char result[10240];
2127                         char result64[10240];
2128                         if (this->keylength)
2129                         {
2130                                 // pad it to the key length
2131                                 int n = this->keylength - (line.length() % this->keylength);
2132                                 if (n)
2133                                 {
2134                                         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);
2135                                         line.append(n,'\7');
2136                                 }
2137                         }
2138                         unsigned int ll = line.length();
2139                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2140                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2141                         line = result64;
2142                         //int from64tobits(char *out, const char *in, int maxlen);
2143                 }
2144                 return this->Write(line + "\r\n");
2145         }
2146
2147         /* Handle ERROR command */
2148         bool Error(std::deque<std::string> &params)
2149         {
2150                 if (params.size() < 1)
2151                         return false;
2152                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2153                 /* we will return false to cause the socket to close. */
2154                 return false;
2155         }
2156
2157         /** remote MOTD. leet, huh? */
2158         bool Motd(std::string prefix, std::deque<std::string> &params)
2159         {
2160                 if (params.size() > 0)
2161                 {
2162                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2163                         {
2164                                 /* It's for our server */
2165                                 string_list results;
2166                                 userrec* source = this->Instance->FindNick(prefix);
2167
2168                                 if (source)
2169                                 {
2170                                         std::deque<std::string> par;
2171                                         par.push_back(prefix);
2172                                         par.push_back("");
2173
2174                                         if (!Instance->Config->MOTD.size())
2175                                         {
2176                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2177                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2178                                                 return true;
2179                                         }
2180
2181                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2182                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2183
2184                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2185                                         {
2186                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2187                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2188                                         }
2189
2190                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2191                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2192                                 }
2193                         }
2194                         else
2195                         {
2196                                 /* Pass it on */
2197                                 userrec* source = this->Instance->FindNick(prefix);
2198                                 if (source)
2199                                         DoOneToOne(prefix, "MOTD", params, params[0]);
2200                         }
2201                 }
2202                 return true;
2203         }
2204
2205         /** remote ADMIN. leet, huh? */
2206         bool Admin(std::string prefix, std::deque<std::string> &params)
2207         {
2208                 if (params.size() > 0)
2209                 {
2210                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2211                         {
2212                                 /* It's for our server */
2213                                 string_list results;
2214                                 userrec* source = this->Instance->FindNick(prefix);
2215
2216                                 if (source)
2217                                 {
2218                                         std::deque<std::string> par;
2219                                         par.push_back(prefix);
2220                                         par.push_back("");
2221
2222                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2223                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2224
2225                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2226                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2227
2228                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2229                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2230
2231                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2232                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2233                                 }
2234                         }
2235                         else
2236                         {
2237                                 /* Pass it on */
2238                                 userrec* source = this->Instance->FindNick(prefix);
2239                                 if (source)
2240                                         DoOneToOne(prefix, "ADMIN", params, params[0]);
2241                         }
2242                 }
2243                 return true;
2244         }
2245
2246         bool Stats(std::string prefix, std::deque<std::string> &params)
2247         {
2248                 /* Get the reply to a STATS query if it matches this servername,
2249                  * and send it back as a load of PUSH queries
2250                  */
2251                 if (params.size() > 1)
2252                 {
2253                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2254                         {
2255                                 /* It's for our server */
2256                                 string_list results;
2257                                 userrec* source = this->Instance->FindNick(prefix);
2258                                 if (source)
2259                                 {
2260                                         std::deque<std::string> par;
2261                                         par.push_back(prefix);
2262                                         par.push_back("");
2263                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2264                                         for (size_t i = 0; i < results.size(); i++)
2265                                         {
2266                                                 par[1] = "::" + results[i];
2267                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2268                                         }
2269                                 }
2270                         }
2271                         else
2272                         {
2273                                 /* Pass it on */
2274                                 userrec* source = this->Instance->FindNick(prefix);
2275                                 if (source)
2276                                         DoOneToOne(prefix, "STATS", params, params[1]);
2277                         }
2278                 }
2279                 return true;
2280         }
2281
2282
2283         /** Because the core won't let users or even SERVERS set +o,
2284          * we use the OPERTYPE command to do this.
2285          */
2286         bool OperType(std::string prefix, std::deque<std::string> &params)
2287         {
2288                 if (params.size() != 1)
2289                 {
2290                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2291                         return true;
2292                 }
2293                 std::string opertype = params[0];
2294                 userrec* u = this->Instance->FindNick(prefix);
2295                 if (u)
2296                 {
2297                         u->modes[UM_OPERATOR] = 1;
2298                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2299                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2300                 }
2301                 return true;
2302         }
2303
2304         /** Because Andy insists that services-compatible servers must
2305          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2306          */
2307         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2308         {
2309                 if (params.size() < 3)
2310                         return true;
2311
2312                 userrec* u = this->Instance->FindNick(params[0]);
2313
2314                 if (u)
2315                 {
2316                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2317                         if (IS_LOCAL(u))
2318                         {
2319                                 std::deque<std::string> par;
2320                                 par.push_back(params[1]);
2321                                 /* This is not required as one is sent in OnUserPostNick below
2322                                  */
2323                                 //DoOneToMany(u->nick,"NICK",par);
2324                                 if (!u->ForceNickChange(params[1].c_str()))
2325                                 {
2326                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2327                                         return true;
2328                                 }
2329                                 u->age = atoi(params[2].c_str());
2330                         }
2331                 }
2332                 return true;
2333         }
2334
2335         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2336         {
2337                 if (params.size() < 2)
2338                         return true;
2339
2340                 userrec* u = this->Instance->FindNick(params[0]);
2341
2342                 if (u)
2343                 {
2344                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2345                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2346                 }
2347                 return true;
2348         }
2349
2350         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2351         {
2352                 if (params.size() < 1)
2353                         return false;
2354
2355                 std::string servermask = params[0];
2356
2357                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2358                 {
2359                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2360                         this->Instance->RehashServer();
2361                         ReadConfiguration(false);
2362                         InitializeDisabledCommands(ServerInstance->Config->DisabledCommands, ServerInstance);
2363                 }
2364                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2365                 return true;
2366         }
2367
2368         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2369         {
2370                 if (params.size() != 2)
2371                         return true;
2372
2373                 std::string nick = params[0];
2374                 userrec* u = this->Instance->FindNick(prefix);
2375                 userrec* who = this->Instance->FindNick(nick);
2376
2377                 if (who)
2378                 {
2379                         /* Prepend kill source, if we don't have one */
2380                         std::string sourceserv = prefix;
2381                         if (u)
2382                         {
2383                                 sourceserv = u->server;
2384                         }
2385                         if (*(params[1].c_str()) != '[')
2386                         {
2387                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2388                         }
2389                         std::string reason = params[1];
2390                         params[1] = ":" + params[1];
2391                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2392                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2393                         userrec::QuitUser(this->Instance,who,reason);
2394                 }
2395                 return true;
2396         }
2397
2398         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2399         {
2400                 if (params.size() < 1)
2401                         return true;
2402
2403                 if (params.size() == 1)
2404                 {
2405                         TreeServer* ServerSource = FindServer(prefix);
2406                         if (ServerSource)
2407                         {
2408                                 ServerSource->SetPingFlag();
2409                         }
2410                 }
2411                 else
2412                 {
2413                         std::string forwardto = params[1];
2414                         if (forwardto == this->Instance->Config->ServerName)
2415                         {
2416                                 /*
2417                                  * this is a PONG for us
2418                                  * if the prefix is a user, check theyre local, and if they are,
2419                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2420                                  * Services might want to send these s->s, but we dont need to yet.
2421                                  */
2422                                 userrec* u = this->Instance->FindNick(prefix);
2423
2424                                 if (u)
2425                                 {
2426                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2427                                 }
2428                         }
2429                         else
2430                         {
2431                                 // not for us, pass it on :)
2432                                 DoOneToOne(prefix,"PONG",params,forwardto);
2433                         }
2434                 }
2435
2436                 return true;
2437         }
2438
2439         bool MetaData(std::string prefix, std::deque<std::string> &params)
2440         {
2441                 if (params.size() < 3)
2442                         return true;
2443
2444                 TreeServer* ServerSource = FindServer(prefix);
2445
2446                 if (ServerSource)
2447                 {
2448                         if (params[0] == "*")
2449                         {
2450                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2451                         }
2452                         else if (*(params[0].c_str()) == '#')
2453                         {
2454                                 chanrec* c = this->Instance->FindChan(params[0]);
2455                                 if (c)
2456                                 {
2457                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2458                                 }
2459                         }
2460                         else if (*(params[0].c_str()) != '#')
2461                         {
2462                                 userrec* u = this->Instance->FindNick(params[0]);
2463                                 if (u)
2464                                 {
2465                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2466                                 }
2467                         }
2468                 }
2469
2470                 params[2] = ":" + params[2];
2471                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2472                 return true;
2473         }
2474
2475         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2476         {
2477                 if (params.size() < 1)
2478                         return true;
2479
2480                 TreeServer* ServerSource = FindServer(prefix);
2481
2482                 if (ServerSource)
2483                 {
2484                         ServerSource->SetVersion(params[0]);
2485                 }
2486                 params[0] = ":" + params[0];
2487                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2488                 return true;
2489         }
2490
2491         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2492         {
2493                 if (params.size() < 1)
2494                         return true;
2495
2496                 userrec* u = this->Instance->FindNick(prefix);
2497
2498                 if (u)
2499                 {
2500                         u->ChangeDisplayedHost(params[0].c_str());
2501                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2502                 }
2503                 return true;
2504         }
2505
2506         bool AddLine(std::string prefix, std::deque<std::string> &params)
2507         {
2508                 if (params.size() < 6)
2509                         return true;
2510
2511                 bool propogate = false;
2512
2513                 switch (*(params[0].c_str()))
2514                 {
2515                         case 'Z':
2516                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2517                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2518                         break;
2519                         case 'Q':
2520                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2521                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2522                         break;
2523                         case 'E':
2524                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2525                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2526                         break;
2527                         case 'G':
2528                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2529                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2530                         break;
2531                         case 'K':
2532                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2533                         break;
2534                         default:
2535                                 /* Just in case... */
2536                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2537                                 propogate = false;
2538                         break;
2539                 }
2540
2541                 /* Send it on its way */
2542                 if (propogate)
2543                 {
2544                         if (atoi(params[4].c_str()))
2545                         {
2546                                 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());
2547                         }
2548                         else
2549                         {
2550                                 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());
2551                         }
2552                         params[5] = ":" + params[5];
2553                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2554                 }
2555                 if (!this->bursting)
2556                 {
2557                         Instance->Log(DEBUG,"Applying lines...");
2558                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2559                 }
2560                 return true;
2561         }
2562
2563         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2564         {
2565                 if (params.size() < 1)
2566                         return true;
2567
2568                 userrec* u = this->Instance->FindNick(prefix);
2569
2570                 if (u)
2571                 {
2572                         u->ChangeName(params[0].c_str());
2573                         params[0] = ":" + params[0];
2574                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2575                 }
2576                 return true;
2577         }
2578
2579         bool Whois(std::string prefix, std::deque<std::string> &params)
2580         {
2581                 if (params.size() < 1)
2582                         return true;
2583
2584                 Instance->Log(DEBUG,"In IDLE command");
2585                 userrec* u = this->Instance->FindNick(prefix);
2586
2587                 if (u)
2588                 {
2589                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2590                         // an incoming request
2591                         if (params.size() == 1)
2592                         {
2593                                 userrec* x = this->Instance->FindNick(params[0]);
2594                                 if ((x) && (IS_LOCAL(x)))
2595                                 {
2596                                         userrec* x = this->Instance->FindNick(params[0]);
2597                                         char signon[MAXBUF];
2598                                         char idle[MAXBUF];
2599
2600                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2601                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2602                                         std::deque<std::string> par;
2603                                         par.push_back(prefix);
2604                                         par.push_back(signon);
2605                                         par.push_back(idle);
2606                                         // ours, we're done, pass it BACK
2607                                         DoOneToOne(params[0],"IDLE",par,u->server);
2608                                 }
2609                                 else
2610                                 {
2611                                         // not ours pass it on
2612                                         DoOneToOne(prefix,"IDLE",params,x->server);
2613                                 }
2614                         }
2615                         else if (params.size() == 3)
2616                         {
2617                                 std::string who_did_the_whois = params[0];
2618                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2619                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2620                                 {
2621                                         // an incoming reply to a whois we sent out
2622                                         std::string nick_whoised = prefix;
2623                                         unsigned long signon = atoi(params[1].c_str());
2624                                         unsigned long idle = atoi(params[2].c_str());
2625                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2626                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2627                                 }
2628                                 else
2629                                 {
2630                                         // not ours, pass it on
2631                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2632                                 }
2633                         }
2634                 }
2635                 return true;
2636         }
2637
2638         bool Push(std::string prefix, std::deque<std::string> &params)
2639         {
2640                 if (params.size() < 2)
2641                         return true;
2642
2643                 userrec* u = this->Instance->FindNick(params[0]);
2644
2645                 if (!u)
2646                         return true;
2647
2648                 if (IS_LOCAL(u))
2649                 {
2650                         u->Write(params[1]);
2651                 }
2652                 else
2653                 {
2654                         // continue the raw onwards
2655                         params[1] = ":" + params[1];
2656                         DoOneToOne(prefix,"PUSH",params,u->server);
2657                 }
2658                 return true;
2659         }
2660
2661         bool Time(std::string prefix, std::deque<std::string> &params)
2662         {
2663                 // :source.server TIME remote.server sendernick
2664                 // :remote.server TIME source.server sendernick TS
2665                 if (params.size() == 2)
2666                 {
2667                         // someone querying our time?
2668                         if (this->Instance->Config->ServerName == params[0])
2669                         {
2670                                 userrec* u = this->Instance->FindNick(params[1]);
2671                                 if (u)
2672                                 {
2673                                         char curtime[256];
2674                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2675                                         params.push_back(curtime);
2676                                         params[0] = prefix;
2677                                         DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2678                                 }
2679                         }
2680                         else
2681                         {
2682                                 // not us, pass it on
2683                                 userrec* u = this->Instance->FindNick(params[1]);
2684                                 if (u)
2685                                         DoOneToOne(prefix,"TIME",params,params[0]);
2686                         }
2687                 }
2688                 else if (params.size() == 3)
2689                 {
2690                         // a response to a previous TIME
2691                         userrec* u = this->Instance->FindNick(params[1]);
2692                         if ((u) && (IS_LOCAL(u)))
2693                         {
2694                         time_t rawtime = atol(params[2].c_str());
2695                         struct tm * timeinfo;
2696                         timeinfo = localtime(&rawtime);
2697                                 char tms[26];
2698                                 snprintf(tms,26,"%s",asctime(timeinfo));
2699                                 tms[24] = 0;
2700                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2701                         }
2702                         else
2703                         {
2704                                 if (u)
2705                                         DoOneToOne(prefix,"TIME",params,u->server);
2706                         }
2707                 }
2708                 return true;
2709         }
2710
2711         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2712         {
2713                 if (params.size() < 1)
2714                         return true;
2715
2716                 if (params.size() == 1)
2717                 {
2718                         std::string stufftobounce = params[0];
2719                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2720                         return true;
2721                 }
2722                 else
2723                 {
2724                         std::string forwardto = params[1];
2725                         if (forwardto == this->Instance->Config->ServerName)
2726                         {
2727                                 // this is a ping for us, send back PONG to the requesting server
2728                                 params[1] = params[0];
2729                                 params[0] = forwardto;
2730                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2731                         }
2732                         else
2733                         {
2734                                 // not for us, pass it on :)
2735                                 DoOneToOne(prefix,"PING",params,forwardto);
2736                         }
2737                         return true;
2738                 }
2739         }
2740
2741         bool RemoveStatus(std::string prefix, std::deque<std::string> &params)
2742         {
2743                 if (params.size() < 1)
2744                         return true;
2745
2746                 chanrec* c = Instance->FindChan(params[0]);
2747
2748                 if (c)
2749                 {
2750                         irc::modestacker modestack(false);
2751                         CUList *ulist = c->GetUsers();
2752                         const char* y[127];
2753                         std::deque<std::string> stackresult;
2754                         std::string x;
2755
2756                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2757                         {
2758                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2759                                 if (modesequence.length())
2760                                 {
2761                                         ServerInstance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2762                                         irc::spacesepstream sep(modesequence);
2763                                         std::string modeletters = sep.GetToken();
2764                                         ServerInstance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2765
2766                                         while (!modeletters.empty())
2767                                         {
2768                                                 char mletter = *(modeletters.begin());
2769                                                 modestack.Push(mletter,sep.GetToken());
2770                                                 ServerInstance->Log(DEBUG,"Push letter = '%c'",mletter);
2771                                                 modeletters.erase(modeletters.begin());
2772                                                 ServerInstance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2773                                         }
2774                                 }
2775                         }
2776
2777                         while (modestack.GetStackedLine(stackresult))
2778                         {
2779                                 ServerInstance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2780                                 stackresult.push_front(ConvToStr(c->age));
2781                                 stackresult.push_front(c->name);
2782                                 DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2783                                 stackresult.erase(stackresult.begin() + 1);
2784                                 ServerInstance->Log(DEBUG,"Stacked items:");
2785                                 for (size_t z = 0; z < stackresult.size(); z++)
2786                                 {
2787                                         y[z] = stackresult[z].c_str();
2788                                         ServerInstance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2789                                 }
2790                                 userrec* n = new userrec(Instance);
2791                                 n->SetFd(FD_MAGIC_NUMBER);
2792                                 Instance->SendMode(y, stackresult.size(), n);
2793                                 delete n;
2794                         }
2795                 }
2796                 return true;
2797         }
2798
2799         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2800         {
2801                 if (params.size() < 4)
2802                         return false;
2803
2804                 std::string servername = params[0];
2805                 std::string password = params[1];
2806                 // hopcount is not used for a remote server, we calculate this ourselves
2807                 std::string description = params[3];
2808                 TreeServer* ParentOfThis = FindServer(prefix);
2809
2810                 if (!ParentOfThis)
2811                 {
2812                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2813                         return false;
2814                 }
2815                 TreeServer* CheckDupe = FindServer(servername);
2816                 if (CheckDupe)
2817                 {
2818                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2819                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2820                         return false;
2821                 }
2822                 TreeServer* Node = new TreeServer(this->Instance,servername,description,ParentOfThis,NULL);
2823                 ParentOfThis->AddChild(Node);
2824                 params[3] = ":" + params[3];
2825                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2826                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2827                 return true;
2828         }
2829
2830         bool Outbound_Reply_Server(std::deque<std::string> &params)
2831         {
2832                 if (params.size() < 4)
2833                         return false;
2834
2835                 irc::string servername = params[0].c_str();
2836                 std::string sname = params[0];
2837                 std::string password = params[1];
2838                 int hops = atoi(params[2].c_str());
2839
2840                 if (hops)
2841                 {
2842                         this->WriteLine("ERROR :Server too far away for authentication");
2843                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2844                         return false;
2845                 }
2846                 std::string description = params[3];
2847                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2848                 {
2849                         if ((x->Name == servername) && (x->RecvPass == password))
2850                         {
2851                                 TreeServer* CheckDupe = FindServer(sname);
2852                                 if (CheckDupe)
2853                                 {
2854                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2855                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2856                                         return false;
2857                                 }
2858                                 // Begin the sync here. this kickstarts the
2859                                 // other side, waiting in WAIT_AUTH_2 state,
2860                                 // into starting their burst, as it shows
2861                                 // that we're happy.
2862                                 this->LinkState = CONNECTED;
2863                                 // we should add the details of this server now
2864                                 // to the servers tree, as a child of the root
2865                                 // node.
2866                                 TreeServer* Node = new TreeServer(this->Instance,sname,description,TreeRoot,this);
2867                                 TreeRoot->AddChild(Node);
2868                                 params[3] = ":" + params[3];
2869                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2870                                 this->bursting = true;
2871                                 this->DoBurst(Node);
2872                                 return true;
2873                         }
2874                 }
2875                 this->WriteLine("ERROR :Invalid credentials");
2876                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2877                 return false;
2878         }
2879
2880         bool Inbound_Server(std::deque<std::string> &params)
2881         {
2882                 if (params.size() < 4)
2883                         return false;
2884
2885                 irc::string servername = params[0].c_str();
2886                 std::string sname = params[0];
2887                 std::string password = params[1];
2888                 int hops = atoi(params[2].c_str());
2889
2890                 if (hops)
2891                 {
2892                         this->WriteLine("ERROR :Server too far away for authentication");
2893                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2894                         return false;
2895                 }
2896                 std::string description = params[3];
2897                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2898                 {
2899                         if ((x->Name == servername) && (x->RecvPass == password))
2900                         {
2901                                 TreeServer* CheckDupe = FindServer(sname);
2902                                 if (CheckDupe)
2903                                 {
2904                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2905                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2906                                         return false;
2907                                 }
2908                                 /* If the config says this link is encrypted, but the remote side
2909                                  * hasnt bothered to send the AES command before SERVER, then we
2910                                  * boot them off as we MUST have this connection encrypted.
2911                                  */
2912                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2913                                 {
2914                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2915                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2916                                         return false;
2917                                 }
2918                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2919                                 this->InboundServerName = sname;
2920                                 this->InboundDescription = description;
2921                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2922                                 // along with the sendpass from this block.
2923                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2924                                 // move to the next state, we are now waiting for THEM.
2925                                 this->LinkState = WAIT_AUTH_2;
2926                                 return true;
2927                         }
2928                 }
2929                 this->WriteLine("ERROR :Invalid credentials");
2930                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2931                 return false;
2932         }
2933
2934         void Split(std::string line, std::deque<std::string> &n)
2935         {
2936                 n.clear();
2937                 irc::tokenstream tokens(line);
2938                 std::string param;
2939                 while ((param = tokens.GetToken()) != "")
2940                         n.push_back(param);
2941                 return;
2942         }
2943
2944         bool ProcessLine(std::string line)
2945         {
2946                 std::deque<std::string> params;
2947                 irc::string command;
2948                 std::string prefix;
2949
2950                 if (line.empty())
2951                         return true;
2952
2953                 line = line.substr(0, line.find_first_of("\r\n"));
2954
2955                 Instance->Log(DEBUG,"IN: %s", line.c_str());
2956
2957                 this->Split(line.c_str(),params);
2958
2959                 if ((params[0][0] == ':') && (params.size() > 1))
2960                 {
2961                         prefix = params[0].substr(1);
2962                         params.pop_front();
2963                 }
2964
2965                 command = params[0].c_str();
2966                 params.pop_front();
2967
2968                 if ((!this->ctx_in) && (command == "AES"))
2969                 {
2970                         std::string sserv = params[0];
2971                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2972                         {
2973                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2974                                 {
2975                                         this->InitAES(x->EncryptionKey,sserv);
2976                                 }
2977                         }
2978
2979                         return true;
2980                 }
2981                 else if ((this->ctx_in) && (command == "AES"))
2982                 {
2983                         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());
2984                 }
2985
2986                 switch (this->LinkState)
2987                 {
2988                         TreeServer* Node;
2989
2990                         case WAIT_AUTH_1:
2991                                 // Waiting for SERVER command from remote server. Server initiating
2992                                 // the connection sends the first SERVER command, listening server
2993                                 // replies with theirs if its happy, then if the initiator is happy,
2994                                 // it starts to send its net sync, which starts the merge, otherwise
2995                                 // it sends an ERROR.
2996                                 if (command == "PASS")
2997                                 {
2998                                         /* Silently ignored */
2999                                 }
3000                                 else if (command == "SERVER")
3001                                 {
3002                                         return this->Inbound_Server(params);
3003                                 }
3004                                 else if (command == "ERROR")
3005                                 {
3006                                         return this->Error(params);
3007                                 }
3008                                 else if (command == "USER")
3009                                 {
3010                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
3011                                         return false;
3012                                 }
3013                                 else if (command == "CAPAB")
3014                                 {
3015                                         return this->Capab(params);
3016                                 }
3017                                 else if ((command == "U") || (command == "S"))
3018                                 {
3019                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3020                                         return false;
3021                                 }
3022                                 else
3023                                 {
3024                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
3025                                         return false;
3026                                 }
3027                         break;
3028                         case WAIT_AUTH_2:
3029                                 // Waiting for start of other side's netmerge to say they liked our
3030                                 // password.
3031                                 if (command == "SERVER")
3032                                 {
3033                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
3034                                         // silently ignore.
3035                                         return true;
3036                                 }
3037                                 else if ((command == "U") || (command == "S"))
3038                                 {
3039                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3040                                         return false;
3041                                 }
3042                                 else if (command == "BURST")
3043                                 {
3044                                         if (params.size())
3045                                         {
3046                                                 /* If a time stamp is provided, try and check syncronization */
3047                                                 time_t THEM = atoi(params[0].c_str());
3048                                                 long delta = THEM-time(NULL);
3049                                                 if ((delta < -600) || (delta > 600))
3050                                                 {
3051                                                         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));
3052                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
3053                                                         return false;
3054                                                 }
3055                                                 else if ((delta < -60) || (delta > 60))
3056                                                 {
3057                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
3058                                                 }
3059                                         }
3060                                         this->LinkState = CONNECTED;
3061                                         Node = new TreeServer(this->Instance,InboundServerName,InboundDescription,TreeRoot,this);
3062                                         TreeRoot->AddChild(Node);
3063                                         params.clear();
3064                                         params.push_back(InboundServerName);
3065                                         params.push_back("*");
3066                                         params.push_back("1");
3067                                         params.push_back(":"+InboundDescription);
3068                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
3069                                         this->bursting = true;
3070                                         this->DoBurst(Node);
3071                                 }
3072                                 else if (command == "ERROR")
3073                                 {
3074                                         return this->Error(params);
3075                                 }
3076                                 else if (command == "CAPAB")
3077                                 {
3078                                         return this->Capab(params);
3079                                 }
3080
3081                         break;
3082                         case LISTENER:
3083                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
3084                                 return false;
3085                         break;
3086                         case CONNECTING:
3087                                 if (command == "SERVER")
3088                                 {
3089                                         // another server we connected to, which was in WAIT_AUTH_1 state,
3090                                         // has just sent us their credentials. If we get this far, theyre
3091                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
3092                                         // if we're happy with this, we should send our netburst which
3093                                         // kickstarts the merge.
3094                                         return this->Outbound_Reply_Server(params);
3095                                 }
3096                                 else if (command == "ERROR")
3097                                 {
3098                                         return this->Error(params);
3099                                 }
3100                         break;
3101                         case CONNECTED:
3102                                 // This is the 'authenticated' state, when all passwords
3103                                 // have been exchanged and anything past this point is taken
3104                                 // as gospel.
3105
3106                                 if (prefix != "")
3107                                 {
3108                                         std::string direction = prefix;
3109                                         userrec* t = this->Instance->FindNick(prefix);
3110                                         if (t)
3111                                         {
3112                                                 direction = t->server;
3113                                         }
3114                                         TreeServer* route_back_again = BestRouteTo(direction);
3115                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3116                                         {
3117                                                 if (route_back_again)
3118                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3119                                                 return true;
3120                                         }
3121
3122                                         /* Fix by brain:
3123                                          * When there is activity on the socket, reset the ping counter so
3124                                          * that we're not wasting bandwidth pinging an active server.
3125                                          */
3126                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3127                                         route_back_again->SetPingFlag();
3128                                 }
3129
3130                                 if (command == "SVSMODE")
3131                                 {
3132                                         /* Services expects us to implement
3133                                          * SVSMODE. In inspircd its the same as
3134                                          * MODE anyway.
3135                                          */
3136                                         command = "MODE";
3137                                 }
3138                                 std::string target = "";
3139                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3140                                  * working with std::string here.
3141                                  */
3142                                 if ((command == "NICK") && (params.size() > 1))
3143                                 {
3144                                         return this->IntroduceClient(prefix,params);
3145                                 }
3146                                 else if (command == "FJOIN")
3147                                 {
3148                                         return this->ForceJoin(prefix,params);
3149                                 }
3150                                 else if (command == "STATS")
3151                                 {
3152                                         return this->Stats(prefix, params);
3153                                 }
3154                                 else if (command == "MOTD")
3155                                 {
3156                                         return this->Motd(prefix, params);
3157                                 }
3158                                 else if (command == "ADMIN")
3159                                 {
3160                                         return this->Admin(prefix, params);
3161                                 }
3162                                 else if (command == "SERVER")
3163                                 {
3164                                         return this->RemoteServer(prefix,params);
3165                                 }
3166                                 else if (command == "ERROR")
3167                                 {
3168                                         return this->Error(params);
3169                                 }
3170                                 else if (command == "OPERTYPE")
3171                                 {
3172                                         return this->OperType(prefix,params);
3173                                 }
3174                                 else if (command == "FMODE")
3175                                 {
3176                                         return this->ForceMode(prefix,params);
3177                                 }
3178                                 else if (command == "KILL")
3179                                 {
3180                                         return this->RemoteKill(prefix,params);
3181                                 }
3182                                 else if (command == "FTOPIC")
3183                                 {
3184                                         return this->ForceTopic(prefix,params);
3185                                 }
3186                                 else if (command == "REHASH")
3187                                 {
3188                                         return this->RemoteRehash(prefix,params);
3189                                 }
3190                                 else if (command == "METADATA")
3191                                 {
3192                                         return this->MetaData(prefix,params);
3193                                 }
3194                                 else if (command == "REMSTATUS")
3195                                 {
3196                                         return this->RemoveStatus(prefix,params);
3197                                 }
3198                                 else if (command == "PING")
3199                                 {
3200                                         /*
3201                                          * We just got a ping from a server that's bursting.
3202                                          * This can't be right, so set them to not bursting, and
3203                                          * apply their lines.
3204                                          */
3205                                         if (this->bursting)
3206                                         {
3207                                                 this->bursting = false;
3208                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3209                                         }
3210                                         if (prefix == "")
3211                                         {
3212                                                 prefix = this->GetName();
3213                                         }
3214                                         return this->LocalPing(prefix,params);
3215                                 }
3216                                 else if (command == "PONG")
3217                                 {
3218                                         /*
3219                                          * We just got a pong from a server that's bursting.
3220                                          * This can't be right, so set them to not bursting, and
3221                                          * apply their lines.
3222                                          */
3223                                         if (this->bursting)
3224                                         {
3225                                                 this->bursting = false;
3226                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3227                                         }
3228                                         if (prefix == "")
3229                                         {
3230                                                 prefix = this->GetName();
3231                                         }
3232                                         return this->LocalPong(prefix,params);
3233                                 }
3234                                 else if (command == "VERSION")
3235                                 {
3236                                         return this->ServerVersion(prefix,params);
3237                                 }
3238                                 else if (command == "FHOST")
3239                                 {
3240                                         return this->ChangeHost(prefix,params);
3241                                 }
3242                                 else if (command == "FNAME")
3243                                 {
3244                                         return this->ChangeName(prefix,params);
3245                                 }
3246                                 else if (command == "ADDLINE")
3247                                 {
3248                                         return this->AddLine(prefix,params);
3249                                 }
3250                                 else if (command == "SVSNICK")
3251                                 {
3252                                         if (prefix == "")
3253                                         {
3254                                                 prefix = this->GetName();
3255                                         }
3256                                         return this->ForceNick(prefix,params);
3257                                 }
3258                                 else if (command == "IDLE")
3259                                 {
3260                                         return this->Whois(prefix,params);
3261                                 }
3262                                 else if (command == "PUSH")
3263                                 {
3264                                         return this->Push(prefix,params);
3265                                 }
3266                                 else if (command == "TIME")
3267                                 {
3268                                         return this->Time(prefix,params);
3269                                 }
3270                                 else if ((command == "KICK") && (IsServer(prefix)))
3271                                 {
3272                                         std::string sourceserv = this->myhost;
3273                                         if (params.size() == 3)
3274                                         {
3275                                                 userrec* user = this->Instance->FindNick(params[1]);
3276                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3277                                                 if (user && chan)
3278                                                 {
3279                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3280                                                                 /* Yikes, the channels gone! */
3281                                                                 delete chan;
3282                                                 }
3283                                         }
3284                                         if (this->InboundServerName != "")
3285                                         {
3286                                                 sourceserv = this->InboundServerName;
3287                                         }
3288                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3289                                 }
3290                                 else if (command == "SVSJOIN")
3291                                 {
3292                                         if (prefix == "")
3293                                         {
3294                                                 prefix = this->GetName();
3295                                         }
3296                                         return this->ServiceJoin(prefix,params);
3297                                 }
3298                                 else if (command == "SQUIT")
3299                                 {
3300                                         if (params.size() == 2)
3301                                         {
3302                                                 this->Squit(FindServer(params[0]),params[1]);
3303                                         }
3304                                         return true;
3305                                 }
3306                                 else if (command == "ENDBURST")
3307                                 {
3308                                         this->bursting = false;
3309                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3310                                         std::string sourceserv = this->myhost;
3311                                         if (this->InboundServerName != "")
3312                                         {
3313                                                 sourceserv = this->InboundServerName;
3314                                         }
3315                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3316                                         return true;
3317                                 }
3318                                 else
3319                                 {
3320                                         // not a special inter-server command.
3321                                         // Emulate the actual user doing the command,
3322                                         // this saves us having a huge ugly parser.
3323                                         userrec* who = this->Instance->FindNick(prefix);
3324                                         std::string sourceserv = this->myhost;
3325                                         if (this->InboundServerName != "")
3326                                         {
3327                                                 sourceserv = this->InboundServerName;
3328                                         }
3329                                         if (who)
3330                                         {
3331                                                 if ((command == "NICK") && (params.size() > 0))
3332                                                 {
3333                                                         /* On nick messages, check that the nick doesnt
3334                                                          * already exist here. If it does, kill their copy,
3335                                                          * and our copy.
3336                                                          */
3337                                                         userrec* x = this->Instance->FindNick(params[0]);
3338                                                         if ((x) && (x != who))
3339                                                         {
3340                                                                 std::deque<std::string> p;
3341                                                                 p.push_back(params[0]);
3342                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3343                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3344                                                                 p.clear();
3345                                                                 p.push_back(prefix);
3346                                                                 p.push_back("Nickname collision");
3347                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3348                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3349                                                                 userrec* y = this->Instance->FindNick(prefix);
3350                                                                 if (y)
3351                                                                 {
3352                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3353                                                                 }
3354                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3355                                                         }
3356                                                 }
3357                                                 // its a user
3358                                                 target = who->server;
3359                                                 const char* strparams[127];
3360                                                 for (unsigned int q = 0; q < params.size(); q++)
3361                                                 {
3362                                                         strparams[q] = params[q].c_str();
3363                                                 }
3364                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3365                                                 {
3366                                                         case CMD_INVALID:
3367                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3368                                                                 return false;
3369                                                         break;
3370                                                         case CMD_FAILURE:
3371                                                                 return true;
3372                                                         break;
3373                                                         default:
3374                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3375                                                         break;
3376                                                 }
3377                                         }
3378                                         else
3379                                         {
3380                                                 // its not a user. Its either a server, or somethings screwed up.
3381                                                 if (IsServer(prefix))
3382                                                 {
3383                                                         target = this->Instance->Config->ServerName;
3384                                                 }
3385                                                 else
3386                                                 {
3387                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3388                                                         return true;
3389                                                 }
3390                                         }
3391                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3392
3393                                 }
3394                                 return true;
3395                         break;
3396                 }
3397                 return true;
3398         }
3399
3400         virtual std::string GetName()
3401         {
3402                 std::string sourceserv = this->myhost;
3403                 if (this->InboundServerName != "")
3404                 {
3405                         sourceserv = this->InboundServerName;
3406                 }
3407                 return sourceserv;
3408         }
3409
3410         virtual void OnTimeout()
3411         {
3412                 if (this->LinkState == CONNECTING)
3413                 {
3414                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3415                         Link* MyLink = FindLink(myhost);
3416                         if (MyLink)
3417                                 DoFailOver(MyLink);
3418                 }
3419         }
3420
3421         virtual void OnClose()
3422         {
3423                 // Connection closed.
3424                 // If the connection is fully up (state CONNECTED)
3425                 // then propogate a netsplit to all peers.
3426                 std::string quitserver = this->myhost;
3427                 if (this->InboundServerName != "")
3428                 {
3429                         quitserver = this->InboundServerName;
3430                 }
3431                 TreeServer* s = FindServer(quitserver);
3432                 if (s)
3433                 {
3434                         Squit(s,"Remote host closed the connection");
3435                 }
3436                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3437         }
3438
3439         virtual int OnIncomingConnection(int newsock, char* ip)
3440         {
3441                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3442                  * or discovering if this port is the server port, we don't allow connections from any
3443                  * IPs for which we don't have a link block.
3444                  */
3445                 bool found = false;
3446
3447                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3448                 if (!found)
3449                 {
3450                         for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
3451                                 if (MatchCIDR(ip, (*i).c_str()))
3452                                         found = true;
3453
3454                         if (!found)
3455                         {
3456                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3457                                 close(newsock);
3458                                 return false;
3459                         }
3460                 }
3461                 TreeSocket* s = new TreeSocket(this->Instance, newsock, ip);
3462                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3463                 return true;
3464         }
3465 };
3466
3467 /** This class is used to resolve server hostnames during /connect and autoconnect.
3468  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3469  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3470  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3471  * will have an IP address which we can then use to continue our connection.
3472  */
3473 class ServernameResolver : public Resolver
3474 {
3475  private:
3476         /** A copy of the Link tag info for what we're connecting to.
3477          * We take a copy, rather than using a pointer, just in case the
3478          * admin takes the tag away and rehashes while the domain is resolving.
3479          */
3480         Link MyLink;
3481  public:
3482         ServernameResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3483         {
3484                 /* Nothing in here, folks */
3485         }
3486
3487         void OnLookupComplete(const std::string &result)
3488         {
3489                 /* Initiate the connection, now that we have an IP to use.
3490                  * Passing a hostname directly to InspSocket causes it to
3491                  * just bail and set its FD to -1.
3492                  */
3493                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3494                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3495                 {
3496                         TreeSocket* newsocket = new TreeSocket(ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3497                         if (newsocket->GetFd() > -1)
3498                         {
3499                                 /* We're all OK */
3500                         }
3501                         else
3502                         {
3503                                 /* Something barfed, show the opers */
3504                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3505                                 delete newsocket;
3506                                 DoFailOver(&MyLink);
3507                         }
3508                 }
3509         }
3510
3511         void OnError(ResolverError e, const std::string &errormessage)
3512         {
3513                 /* Ooops! */
3514                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3515                 DoFailOver(&MyLink);
3516         }
3517 };
3518
3519 class SecurityIPResolver : public Resolver
3520 {
3521  private:
3522         Link MyLink;
3523  public:
3524         SecurityIPResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3525         {
3526         }
3527
3528         void OnLookupComplete(const std::string &result)
3529         {
3530                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3531                 ValidIPs.push_back(result);
3532         }
3533
3534         void OnError(ResolverError e, const std::string &errormessage)
3535         {
3536                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3537         }
3538 };
3539
3540 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3541 {
3542         for (unsigned int c = 0; c < list.size(); c++)
3543         {
3544                 if (list[c] == server)
3545                 {
3546                         return;
3547                 }
3548         }
3549         list.push_back(server);
3550 }
3551
3552 /** returns a list of DIRECT servernames for a specific channel */
3553 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3554 {
3555         CUList *ulist = c->GetUsers();
3556         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3557         {
3558                 if (i->second->GetFd() < 0)
3559                 {
3560                         TreeServer* best = BestRouteTo(i->second->server);
3561                         if (best)
3562                                 AddThisServer(best,list);
3563                 }
3564         }
3565         return;
3566 }
3567
3568 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3569 {
3570         TreeServer* omitroute = BestRouteTo(omit);
3571         if ((command == "NOTICE") || (command == "PRIVMSG"))
3572         {
3573                 if (params.size() >= 2)
3574                 {
3575                         /* Prefixes */
3576                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3577                         {
3578                                 params[0] = params[0].substr(1, params[0].length()-1);
3579                         }
3580                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3581                         {
3582                                 // special routing for private messages/notices
3583                                 userrec* d = ServerInstance->FindNick(params[0]);
3584                                 if (d)
3585                                 {
3586                                         std::deque<std::string> par;
3587                                         par.push_back(params[0]);
3588                                         par.push_back(":"+params[1]);
3589                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3590                                         return true;
3591                                 }
3592                         }
3593                         else if (*(params[0].c_str()) == '$')
3594                         {
3595                                 std::deque<std::string> par;
3596                                 par.push_back(params[0]);
3597                                 par.push_back(":"+params[1]);
3598                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3599                                 return true;
3600                         }
3601                         else
3602                         {
3603                                 ServerInstance->Log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3604                                 chanrec* c = ServerInstance->FindChan(params[0]);
3605                                 if (c)
3606                                 {
3607                                         std::deque<TreeServer*> list;
3608                                         GetListOfServersForChannel(c,list);
3609                                         ServerInstance->Log(DEBUG,"Got a list of %d servers",list.size());
3610                                         unsigned int lsize = list.size();
3611                                         for (unsigned int i = 0; i < lsize; i++)
3612                                         {
3613                                                 TreeSocket* Sock = list[i]->GetSocket();
3614                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3615                                                 {
3616                                                         ServerInstance->Log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3617                                                         Sock->WriteLine(data);
3618                                                 }
3619                                         }
3620                                         return true;
3621                                 }
3622                         }
3623                 }
3624         }
3625         unsigned int items = TreeRoot->ChildCount();
3626         for (unsigned int x = 0; x < items; x++)
3627         {
3628                 TreeServer* Route = TreeRoot->GetChild(x);
3629                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3630                 {
3631                         TreeSocket* Sock = Route->GetSocket();
3632                         if (Sock)
3633                                 Sock->WriteLine(data);
3634                 }
3635         }
3636         return true;
3637 }
3638
3639 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3640 {
3641         TreeServer* omitroute = BestRouteTo(omit);
3642         std::string FullLine = ":" + prefix + " " + command;
3643         unsigned int words = params.size();
3644         for (unsigned int x = 0; x < words; x++)
3645         {
3646                 FullLine = FullLine + " " + params[x];
3647         }
3648         unsigned int items = TreeRoot->ChildCount();
3649         for (unsigned int x = 0; x < items; x++)
3650         {
3651                 TreeServer* Route = TreeRoot->GetChild(x);
3652                 // Send the line IF:
3653                 // The route has a socket (its a direct connection)
3654                 // The route isnt the one to be omitted
3655                 // The route isnt the path to the one to be omitted
3656                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3657                 {
3658                         TreeSocket* Sock = Route->GetSocket();
3659                         if (Sock)
3660                                 Sock->WriteLine(FullLine);
3661                 }
3662         }
3663         return true;
3664 }
3665
3666 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3667 {
3668         std::string FullLine = ":" + prefix + " " + command;
3669         unsigned int words = params.size();
3670         for (unsigned int x = 0; x < words; x++)
3671         {
3672                 FullLine = FullLine + " " + params[x];
3673         }
3674         unsigned int items = TreeRoot->ChildCount();
3675         for (unsigned int x = 0; x < items; x++)
3676         {
3677                 TreeServer* Route = TreeRoot->GetChild(x);
3678                 if (Route && Route->GetSocket())
3679                 {
3680                         TreeSocket* Sock = Route->GetSocket();
3681                         if (Sock)
3682                                 Sock->WriteLine(FullLine);
3683                 }
3684         }
3685         return true;
3686 }
3687
3688 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3689 {
3690         std::string spfx = prefix;
3691         std::string scmd = command;
3692         return DoOneToMany(spfx, scmd, params);
3693 }
3694
3695 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3696 {
3697         std::string spfx = prefix;
3698         std::string scmd = command;
3699         return DoOneToAllButSender(spfx, scmd, params, omit);
3700 }
3701
3702 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3703 {
3704         TreeServer* Route = BestRouteTo(target);
3705         if (Route)
3706         {
3707                 std::string FullLine = ":" + prefix + " " + command;
3708                 unsigned int words = params.size();
3709                 for (unsigned int x = 0; x < words; x++)
3710                 {
3711                         FullLine = FullLine + " " + params[x];
3712                 }
3713                 if (Route && Route->GetSocket())
3714                 {
3715                         TreeSocket* Sock = Route->GetSocket();
3716                         if (Sock)
3717                                 Sock->WriteLine(FullLine);
3718                 }
3719                 return true;
3720         }
3721         else
3722         {
3723                 return false;
3724         }
3725 }
3726
3727 std::vector<TreeSocket*> Bindings;
3728
3729 void ReadConfiguration(bool rebind)
3730 {
3731         Conf = new ConfigReader(ServerInstance);
3732         if (rebind)
3733         {
3734                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3735                 {
3736                         std::string Type = Conf->ReadValue("bind","type",j);
3737                         std::string IP = Conf->ReadValue("bind","address",j);
3738                         long Port = Conf->ReadInteger("bind","port",j,true);
3739                         if (Type == "servers")
3740                         {
3741                                 if (IP == "*")
3742                                 {
3743                                         IP = "";
3744                                 }
3745                                 TreeSocket* listener = new TreeSocket(ServerInstance, IP.c_str(),Port,true,10);
3746                                 if (listener->GetState() == I_LISTENING)
3747                                 {
3748                                         Bindings.push_back(listener);
3749                                 }
3750                                 else
3751                                 {
3752                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3753                                         listener->Close();
3754                                         DELETE(listener);
3755                                 }
3756                         }
3757                 }
3758         }
3759         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3760         HideULines = Conf->ReadFlag("options","hideulines",0);
3761         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
3762         LinkBlocks.clear();
3763         ValidIPs.clear();
3764         for (int j =0; j < Conf->Enumerate("link"); j++)
3765         {
3766                 Link L;
3767                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3768                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3769                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3770                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3771                 L.Port = Conf->ReadInteger("link","port",j,true);
3772                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3773                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3774                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3775                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3776                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3777                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3778                 /* Bugfix by brain, do not allow people to enter bad configurations */
3779                 if (L.Name != ServerInstance->Config->ServerName)
3780                 {
3781                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3782                         {
3783                                 ValidIPs.push_back(L.IPAddr);
3784
3785                                 if (Allow.length())
3786                                         ValidIPs.push_back(Allow);
3787
3788                                 /* Needs resolving */
3789                                 insp_inaddr binip;
3790                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3791                                 {
3792                                         try
3793                                         {
3794                                                 SecurityIPResolver* sr = new SecurityIPResolver(ServerInstance, L.IPAddr, L);
3795                                                 ServerInstance->AddResolver(sr);
3796                                         }
3797                                         catch (ModuleException& e)
3798                                         {
3799                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3800                                         }
3801                                 }
3802
3803                                 LinkBlocks.push_back(L);
3804                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3805                         }
3806                         else
3807                         {
3808                                 if (L.IPAddr == "")
3809                                 {
3810                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3811                                 }
3812                                 else if (L.RecvPass == "")
3813                                 {
3814                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3815                                 }
3816                                 else if (L.SendPass == "")
3817                                 {
3818                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3819                                 }
3820                                 else if (L.Name == "")
3821                                 {
3822                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3823                                 }
3824                                 else if (!L.Port)
3825                                 {
3826                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3827                                 }
3828                         }
3829                 }
3830                 else
3831                 {
3832                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3833                 }
3834         }
3835         DELETE(Conf);
3836 }
3837
3838
3839 class ModuleSpanningTree : public Module
3840 {
3841         std::vector<TreeSocket*> Bindings;
3842         int line;
3843         int NumServers;
3844         unsigned int max_local;
3845         unsigned int max_global;
3846         cmd_rconnect* command_rconnect;
3847
3848  public:
3849
3850         ModuleSpanningTree(InspIRCd* Me)
3851                 : Module::Module(Me), max_local(0), max_global(0)
3852         {
3853
3854                 Bindings.clear();
3855
3856                 ::ServerInstance = Me;
3857
3858                 // Create the root of the tree
3859                 TreeRoot = new TreeServer(ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3860
3861                 ReadConfiguration(true);
3862
3863                 command_rconnect = new cmd_rconnect(ServerInstance, this);
3864                 ServerInstance->AddCommand(command_rconnect);
3865         }
3866
3867         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3868         {
3869                 std::string Parent = TreeRoot->GetName();
3870                 if (Current->GetParent())
3871                 {
3872                         Parent = Current->GetParent()->GetName();
3873                 }
3874                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3875                 {
3876                         if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3877                         {
3878                                 if (*user->oper)
3879                                 {
3880                                          ShowLinks(Current->GetChild(q),user,hops+1);
3881                                 }
3882                         }
3883                         else
3884                         {
3885                                 ShowLinks(Current->GetChild(q),user,hops+1);
3886                         }
3887                 }
3888                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3889                 if ((HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3890                         return;
3891                 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());
3892         }
3893
3894         int CountLocalServs()
3895         {
3896                 return TreeRoot->ChildCount();
3897         }
3898
3899         int CountServs()
3900         {
3901                 return serverlist.size();
3902         }
3903
3904         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3905         {
3906                 ShowLinks(TreeRoot,user,0);
3907                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3908                 return;
3909         }
3910
3911         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3912         {
3913                 unsigned int n_users = ServerInstance->UserCount();
3914
3915                 /* Only update these when someone wants to see them, more efficient */
3916                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3917                         max_local = ServerInstance->LocalUserCount();
3918                 if (n_users > max_global)
3919                         max_global = n_users;
3920
3921                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3922                 if (ServerInstance->OperCount())
3923                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3924                 if (ServerInstance->UnregisteredUserCount())
3925                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3926                 if (ServerInstance->ChannelCount())
3927                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3928                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3929                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3930                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3931                 return;
3932         }
3933
3934         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3935
3936         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3937         {
3938                 if (line < 128)
3939                 {
3940                         for (int t = 0; t < depth; t++)
3941                         {
3942                                 matrix[line][t] = ' ';
3943                         }
3944
3945                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3946                         // a 'Spacer' String to compensate.
3947                         char spacer[40];
3948
3949                         memset(spacer,' ',40);
3950                         if ((40 - Current->GetName().length() - depth) > 1) {
3951                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3952                         }
3953                         else
3954                         {
3955                                 spacer[5] = '\0';
3956                         }
3957
3958                         float percent;
3959                         char text[80];
3960                         if (ServerInstance->clientlist.size() == 0) {
3961                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3962                                 percent = 0;
3963                         }
3964                         else
3965                         {
3966                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3967                         }
3968                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3969                         totusers += Current->GetUserCount();
3970                         totservers++;
3971                         strlcpy(&matrix[line][depth],text,80);
3972                         line++;
3973                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3974                         {
3975                                 if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3976                                 {
3977                                         if (*user->oper)
3978                                         {
3979                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3980                                         }
3981                                 }
3982                                 else
3983                                 {
3984                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3985                                 }
3986                         }
3987                 }
3988         }
3989
3990         int HandleMotd(const char** parameters, int pcnt, userrec* user)
3991         {
3992                 if (pcnt > 0)
3993                 {
3994                         /* Remote MOTD, the server is within the 1st parameter */
3995                         std::deque<std::string> params;
3996                         params.push_back(parameters[0]);
3997
3998                         /* Send it out remotely, generate no reply yet */
3999                         TreeServer* s = FindServerMask(parameters[0]);
4000                         if (s)
4001                         {
4002                                 DoOneToOne(user->nick, "MOTD", params, s->GetName());
4003                         }
4004                         else
4005                         {
4006                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4007                         }
4008                         return 1;
4009                 }
4010                 return 0;
4011         }
4012
4013         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
4014         {
4015                 if (pcnt > 0)
4016                 {
4017                         /* Remote ADMIN, the server is within the 1st parameter */
4018                         std::deque<std::string> params;
4019                         params.push_back(parameters[0]);
4020
4021                         /* Send it out remotely, generate no reply yet */
4022                         TreeServer* s = FindServerMask(parameters[0]);
4023                         if (s)
4024                         {
4025                                 DoOneToOne(user->nick, "ADMIN", params, s->GetName());
4026                         }
4027                         else
4028                         {
4029                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4030                         }
4031                         return 1;
4032                 }
4033                 return 0;
4034         }
4035
4036         int HandleStats(const char** parameters, int pcnt, userrec* user)
4037         {
4038                 if (pcnt > 1)
4039                 {
4040                         /* Remote STATS, the server is within the 2nd parameter */
4041                         std::deque<std::string> params;
4042                         params.push_back(parameters[0]);
4043                         params.push_back(parameters[1]);
4044                         /* Send it out remotely, generate no reply yet */
4045                         TreeServer* s = FindServerMask(parameters[1]);
4046                         if (s)
4047                         {
4048                                 params[1] = s->GetName();
4049                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
4050                         }
4051                         else
4052                         {
4053                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4054                         }
4055                         return 1;
4056                 }
4057                 return 0;
4058         }
4059
4060         // Ok, prepare to be confused.
4061         // After much mulling over how to approach this, it struck me that
4062         // the 'usual' way of doing a /MAP isnt the best way. Instead of
4063         // keeping track of a ton of ascii characters, and line by line
4064         // under recursion working out where to place them using multiplications
4065         // and divisons, we instead render the map onto a backplane of characters
4066         // (a character matrix), then draw the branches as a series of "L" shapes
4067         // from the nodes. This is not only friendlier on CPU it uses less stack.
4068
4069         void HandleMap(const char** parameters, int pcnt, userrec* user)
4070         {
4071                 // This array represents a virtual screen which we will
4072                 // "scratch" draw to, as the console device of an irc
4073                 // client does not provide for a proper terminal.
4074                 float totusers = 0;
4075                 float totservers = 0;
4076                 char matrix[128][80];
4077                 for (unsigned int t = 0; t < 128; t++)
4078                 {
4079                         matrix[t][0] = '\0';
4080                 }
4081                 line = 0;
4082                 // The only recursive bit is called here.
4083                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
4084                 // Process each line one by one. The algorithm has a limit of
4085                 // 128 servers (which is far more than a spanning tree should have
4086                 // anyway, so we're ok). This limit can be raised simply by making
4087                 // the character matrix deeper, 128 rows taking 10k of memory.
4088                 for (int l = 1; l < line; l++)
4089                 {
4090                         // scan across the line looking for the start of the
4091                         // servername (the recursive part of the algorithm has placed
4092                         // the servers at indented positions depending on what they
4093                         // are related to)
4094                         int first_nonspace = 0;
4095                         while (matrix[l][first_nonspace] == ' ')
4096                         {
4097                                 first_nonspace++;
4098                         }
4099                         first_nonspace--;
4100                         // Draw the `- (corner) section: this may be overwritten by
4101                         // another L shape passing along the same vertical pane, becoming
4102                         // a |- (branch) section instead.
4103                         matrix[l][first_nonspace] = '-';
4104                         matrix[l][first_nonspace-1] = '`';
4105                         int l2 = l - 1;
4106                         // Draw upwards until we hit the parent server, causing possibly
4107                         // other corners (`-) to become branches (|-)
4108                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
4109                         {
4110                                 matrix[l2][first_nonspace-1] = '|';
4111                                 l2--;
4112                         }
4113                 }
4114                 // dump the whole lot to the user. This is the easy bit, honest.
4115                 for (int t = 0; t < line; t++)
4116                 {
4117                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4118                 }
4119                 float avg_users = totusers / totservers;
4120                 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);
4121         user->WriteServ("007 %s :End of /MAP",user->nick);
4122                 return;
4123         }
4124
4125         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4126         {
4127                 TreeServer* s = FindServerMask(parameters[0]);
4128                 if (s)
4129                 {
4130                         if (s == TreeRoot)
4131                         {
4132                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4133                                 return 1;
4134                         }
4135                         TreeSocket* sock = s->GetSocket();
4136                         if (sock)
4137                         {
4138                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4139                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4140                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
4141                                 ServerInstance->SE->DelFd(sock);
4142                                 sock->Close();
4143                                 delete sock;
4144                         }
4145                         else
4146                         {
4147                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
4148                         }
4149                 }
4150                 else
4151                 {
4152                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4153                 }
4154                 return 1;
4155         }
4156
4157         int HandleTime(const char** parameters, int pcnt, userrec* user)
4158         {
4159                 if ((IS_LOCAL(user)) && (pcnt))
4160                 {
4161                         TreeServer* found = FindServerMask(parameters[0]);
4162                         if (found)
4163                         {
4164                                 // we dont' override for local server
4165                                 if (found == TreeRoot)
4166                                         return 0;
4167
4168                                 std::deque<std::string> params;
4169                                 params.push_back(found->GetName());
4170                                 params.push_back(user->nick);
4171                                 DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4172                         }
4173                         else
4174                         {
4175                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4176                         }
4177                 }
4178                 return 1;
4179         }
4180
4181         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4182         {
4183                 if ((IS_LOCAL(user)) && (pcnt > 1))
4184                 {
4185                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4186                         if ((remote) && (remote->GetFd() < 0))
4187                         {
4188                                 std::deque<std::string> params;
4189                                 params.push_back(parameters[1]);
4190                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
4191                                 return 1;
4192                         }
4193                         else if (!remote)
4194                         {
4195                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4196                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4197                                 return 1;
4198                         }
4199                 }
4200                 return 0;
4201         }
4202
4203         void DoPingChecks(time_t curtime)
4204         {
4205                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
4206                 {
4207                         TreeServer* serv = TreeRoot->GetChild(j);
4208                         TreeSocket* sock = serv->GetSocket();
4209                         if (sock)
4210                         {
4211                                 if (curtime >= serv->NextPingTime())
4212                                 {
4213                                         if (serv->AnsweredLastPing())
4214                                         {
4215                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4216                                                 serv->SetNextPingTime(curtime + 60);
4217                                         }
4218                                         else
4219                                         {
4220                                                 // they didnt answer, boot them
4221                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4222                                                 sock->Squit(serv,"Ping timeout");
4223                                                 ServerInstance->SE->DelFd(sock);
4224                                                 sock->Close();
4225                                                 delete sock;
4226                                                 return;
4227                                         }
4228                                 }
4229                         }
4230                 }
4231         }
4232
4233         void ConnectServer(Link* x)
4234         {
4235                 insp_inaddr binip;
4236
4237                 /* Do we already have an IP? If so, no need to resolve it. */
4238                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4239                 {
4240                         TreeSocket* newsocket = new TreeSocket(ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4241                         if (newsocket->GetFd() > -1)
4242                         {
4243                                 /* Handled automatically on success */
4244                         }
4245                         else
4246                         {
4247                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4248                                 delete newsocket;
4249                                 this->DoFailOver(x);
4250                         }
4251                 }
4252                 else
4253                 {
4254                         try
4255                         {
4256                                 ServernameResolver* snr = new ServernameResolver(ServerInstance,x->IPAddr, *x);
4257                                 ServerInstance->AddResolver(snr);
4258                         }
4259                         catch (ModuleException& e)
4260                         {
4261                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4262                                 this->DoFailOver(x);
4263                         }
4264                 }
4265         }
4266
4267         void DoFailOver(Link* x)
4268         {
4269                 if (x->FailOver.length())
4270                 {
4271                         if (x->FailOver == x->Name)
4272                         {
4273                                 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());
4274                                 return;
4275                         }
4276                         Link* TryThisOne = this->FindLink(x->FailOver.c_str());
4277                         if (TryThisOne)
4278                         {
4279                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
4280                                 ConnectServer(TryThisOne);
4281                         }
4282                         else
4283                         {
4284                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
4285                         }
4286                 }
4287         }
4288
4289         Link* FindLink(const std::string& name)
4290         {
4291                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4292                 {
4293                         if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
4294                         {
4295                                 return &(*x);
4296                         }
4297                 }
4298                 return NULL;
4299         }
4300
4301         void AutoConnectServers(time_t curtime)
4302         {
4303                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4304                 {
4305                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4306                         {
4307                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4308                                 x->NextConnectTime = curtime + x->AutoConnect;
4309                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4310                                 if (x->FailOver.length())
4311                                 {
4312                                         TreeServer* CheckFailOver = FindServer(x->FailOver.c_str());
4313                                         if (CheckFailOver)
4314                                         {
4315                                                 /* The failover for this server is currently a member of the network.
4316                                                  * The failover probably succeeded, where the main link did not.
4317                                                  * Don't try the main link until the failover is gone again.
4318                                                  */
4319                                                 continue;
4320                                         }
4321                                 }
4322                                 if (!CheckDupe)
4323                                 {
4324                                         // an autoconnected server is not connected. Check if its time to connect it
4325                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4326                                         this->ConnectServer(&(*x));
4327                                 }
4328                         }
4329                 }
4330         }
4331
4332         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4333         {
4334                 // we've already checked if pcnt > 0, so this is safe
4335                 TreeServer* found = FindServerMask(parameters[0]);
4336                 if (found)
4337                 {
4338                         std::string Version = found->GetVersion();
4339                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4340                         if (found == TreeRoot)
4341                         {
4342                                 std::stringstream out(ServerInstance->Config->data005);
4343                                 std::string token = "";
4344                                 std::string line5 = "";
4345                                 int token_counter = 0;
4346
4347                                 while (!out.eof())
4348                                 {
4349                                         out >> token;
4350                                         line5 = line5 + token + " ";
4351                                         token_counter++;
4352
4353                                         if ((token_counter >= 13) || (out.eof() == true))
4354                                         {
4355                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4356                                                 line5 = "";
4357                                                 token_counter = 0;
4358                                         }
4359                                 }
4360                         }
4361                 }
4362                 else
4363                 {
4364                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4365                 }
4366                 return 1;
4367         }
4368
4369         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4370         {
4371                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4372                 {
4373                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4374                         {
4375                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4376                                 if (!CheckDupe)
4377                                 {
4378                                         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);
4379                                         ConnectServer(&(*x));
4380                                         return 1;
4381                                 }
4382                                 else
4383                                 {
4384                                         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());
4385                                         return 1;
4386                                 }
4387                         }
4388                 }
4389                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4390                 return 1;
4391         }
4392
4393         virtual int OnStats(char statschar, userrec* user, string_list &results)
4394         {
4395                 if (statschar == 'c')
4396                 {
4397                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
4398                         {
4399                                 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');
4400                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
4401                         }
4402                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4403                         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);
4404                         return 1;
4405                 }
4406                 return 0;
4407         }
4408
4409         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4410         {
4411                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4412                 if (!validated)
4413                         return 0;
4414
4415                 if (command == "CONNECT")
4416                 {
4417                         return this->HandleConnect(parameters,pcnt,user);
4418                 }
4419                 else if (command == "STATS")
4420                 {
4421                         return this->HandleStats(parameters,pcnt,user);
4422                 }
4423                 else if (command == "MOTD")
4424                 {
4425                         return this->HandleMotd(parameters,pcnt,user);
4426                 }
4427                 else if (command == "ADMIN")
4428                 {
4429                         return this->HandleAdmin(parameters,pcnt,user);
4430                 }
4431                 else if (command == "SQUIT")
4432                 {
4433                         return this->HandleSquit(parameters,pcnt,user);
4434                 }
4435                 else if (command == "MAP")
4436                 {
4437                         this->HandleMap(parameters,pcnt,user);
4438                         return 1;
4439                 }
4440                 else if ((command == "TIME") && (pcnt > 0))
4441                 {
4442                         return this->HandleTime(parameters,pcnt,user);
4443                 }
4444                 else if (command == "LUSERS")
4445                 {
4446                         this->HandleLusers(parameters,pcnt,user);
4447                         return 1;
4448                 }
4449                 else if (command == "LINKS")
4450                 {
4451                         this->HandleLinks(parameters,pcnt,user);
4452                         return 1;
4453                 }
4454                 else if (command == "WHOIS")
4455                 {
4456                         if (pcnt > 1)
4457                         {
4458                                 // remote whois
4459                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4460                         }
4461                 }
4462                 else if ((command == "VERSION") && (pcnt > 0))
4463                 {
4464                         this->HandleVersion(parameters,pcnt,user);
4465                         return 1;
4466                 }
4467
4468                 return 0;
4469         }
4470
4471         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4472         {
4473                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4474                 {
4475                         // this bit of code cleverly routes all module commands
4476                         // to all remote severs *automatically* so that modules
4477                         // can just handle commands locally, without having
4478                         // to have any special provision in place for remote
4479                         // commands and linking protocols.
4480                         std::deque<std::string> params;
4481                         params.clear();
4482                         for (int j = 0; j < pcnt; j++)
4483                         {
4484                                 if (strchr(parameters[j],' '))
4485                                 {
4486                                         params.push_back(":" + std::string(parameters[j]));
4487                                 }
4488                                 else
4489                                 {
4490                                         params.push_back(std::string(parameters[j]));
4491                                 }
4492                         }
4493                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4494                         DoOneToMany(user->nick,command,params);
4495                 }
4496         }
4497
4498         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4499         {
4500                 TreeServer* s = FindServer(servername);
4501                 if (s)
4502                 {
4503                         description = s->GetDesc();
4504                 }
4505         }
4506
4507         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4508         {
4509                 if (IS_LOCAL(source))
4510                 {
4511                         std::deque<std::string> params;
4512                         params.push_back(dest->nick);
4513                         params.push_back(channel->name);
4514                         DoOneToMany(source->nick,"INVITE",params);
4515                 }
4516         }
4517
4518         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4519         {
4520                 std::deque<std::string> params;
4521                 params.push_back(chan->name);
4522                 params.push_back(":"+topic);
4523                 DoOneToMany(user->nick,"TOPIC",params);
4524         }
4525
4526         virtual void OnWallops(userrec* user, const std::string &text)
4527         {
4528                 if (IS_LOCAL(user))
4529                 {
4530                         std::deque<std::string> params;
4531                         params.push_back(":"+text);
4532                         DoOneToMany(user->nick,"WALLOPS",params);
4533                 }
4534         }
4535
4536         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4537         {
4538                 if (target_type == TYPE_USER)
4539                 {
4540                         userrec* d = (userrec*)dest;
4541                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4542                         {
4543                                 std::deque<std::string> params;
4544                                 params.clear();
4545                                 params.push_back(d->nick);
4546                                 params.push_back(":"+text);
4547                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4548                         }
4549                 }
4550                 else if (target_type == TYPE_CHANNEL)
4551                 {
4552                         if (IS_LOCAL(user))
4553                         {
4554                                 chanrec *c = (chanrec*)dest;
4555                                 if (c)
4556                                 {
4557                                         std::string cname = c->name;
4558                                         if (status)
4559                                                 cname = status + cname;
4560                                         std::deque<TreeServer*> list;
4561                                         GetListOfServersForChannel(c,list);
4562                                         unsigned int ucount = list.size();
4563                                         for (unsigned int i = 0; i < ucount; i++)
4564                                         {
4565                                                 TreeSocket* Sock = list[i]->GetSocket();
4566                                                 if (Sock)
4567                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4568                                         }
4569                                 }
4570                         }
4571                 }
4572                 else if (target_type == TYPE_SERVER)
4573                 {
4574                         if (IS_LOCAL(user))
4575                         {
4576                                 char* target = (char*)dest;
4577                                 std::deque<std::string> par;
4578                                 par.push_back(target);
4579                                 par.push_back(":"+text);
4580                                 DoOneToMany(user->nick,"NOTICE",par);
4581                         }
4582                 }
4583         }
4584
4585         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4586         {
4587                 if (target_type == TYPE_USER)
4588                 {
4589                         // route private messages which are targetted at clients only to the server
4590                         // which needs to receive them
4591                         userrec* d = (userrec*)dest;
4592                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4593                         {
4594                                 std::deque<std::string> params;
4595                                 params.clear();
4596                                 params.push_back(d->nick);
4597                                 params.push_back(":"+text);
4598                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4599                         }
4600                 }
4601                 else if (target_type == TYPE_CHANNEL)
4602                 {
4603                         if (IS_LOCAL(user))
4604                         {
4605                                 chanrec *c = (chanrec*)dest;
4606                                 if (c)
4607                                 {
4608                                         std::string cname = c->name;
4609                                         if (status)
4610                                                 cname = status + cname;
4611                                         std::deque<TreeServer*> list;
4612                                         GetListOfServersForChannel(c,list);
4613                                         unsigned int ucount = list.size();
4614                                         for (unsigned int i = 0; i < ucount; i++)
4615                                         {
4616                                                 TreeSocket* Sock = list[i]->GetSocket();
4617                                                 if (Sock)
4618                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4619                                         }
4620                                 }
4621                         }
4622                 }
4623                 else if (target_type == TYPE_SERVER)
4624                 {
4625                         if (IS_LOCAL(user))
4626                         {
4627                                 char* target = (char*)dest;
4628                                 std::deque<std::string> par;
4629                                 par.push_back(target);
4630                                 par.push_back(":"+text);
4631                                 DoOneToMany(user->nick,"PRIVMSG",par);
4632                         }
4633                 }
4634         }
4635
4636         virtual void OnBackgroundTimer(time_t curtime)
4637         {
4638                 AutoConnectServers(curtime);
4639                 DoPingChecks(curtime);
4640         }
4641
4642         virtual void OnUserJoin(userrec* user, chanrec* channel)
4643         {
4644                 // Only do this for local users
4645                 if (IS_LOCAL(user))
4646                 {
4647                         std::deque<std::string> params;
4648                         params.clear();
4649                         params.push_back(channel->name);
4650                         // set up their permissions and the channel TS with FJOIN.
4651                         // All users are FJOINed now, because a module may specify
4652                         // new joining permissions for the user.
4653                         params.clear();
4654                         params.push_back(channel->name);
4655                         params.push_back(ConvToStr(channel->age));
4656                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4657                         DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4658                 }
4659         }
4660
4661         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4662         {
4663                 // only occurs for local clients
4664                 if (user->registered != REG_ALL)
4665                         return;
4666                 std::deque<std::string> params;
4667                 params.push_back(newhost);
4668                 DoOneToMany(user->nick,"FHOST",params);
4669         }
4670
4671         virtual void OnChangeName(userrec* user, const std::string &gecos)
4672         {
4673                 // only occurs for local clients
4674                 if (user->registered != REG_ALL)
4675                         return;
4676                 std::deque<std::string> params;
4677                 params.push_back(gecos);
4678                 DoOneToMany(user->nick,"FNAME",params);
4679         }
4680
4681         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4682         {
4683                 if (IS_LOCAL(user))
4684                 {
4685                         std::deque<std::string> params;
4686                         params.push_back(channel->name);
4687                         if (partmessage != "")
4688                                 params.push_back(":"+partmessage);
4689                         DoOneToMany(user->nick,"PART",params);
4690                 }
4691         }
4692
4693         virtual void OnUserConnect(userrec* user)
4694         {
4695                 char agestr[MAXBUF];
4696                 if (IS_LOCAL(user))
4697                 {
4698                         std::deque<std::string> params;
4699                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4700                         params.push_back(agestr);
4701                         params.push_back(user->nick);
4702                         params.push_back(user->host);
4703                         params.push_back(user->dhost);
4704                         params.push_back(user->ident);
4705                         params.push_back("+"+std::string(user->FormatModes()));
4706                         params.push_back(user->GetIPString());
4707                         params.push_back(":"+std::string(user->fullname));
4708                         DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4709
4710                         // User is Local, change needs to be reflected!
4711                         TreeServer* SourceServer = FindServer(user->server);
4712                         if (SourceServer)
4713                         {
4714                                 SourceServer->AddUserCount();
4715                         }
4716
4717                 }
4718         }
4719
4720         virtual void OnUserQuit(userrec* user, const std::string &reason)
4721         {
4722                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4723                 {
4724                         std::deque<std::string> params;
4725                         params.push_back(":"+reason);
4726                         DoOneToMany(user->nick,"QUIT",params);
4727                 }
4728                 // Regardless, We need to modify the user Counts..
4729                 TreeServer* SourceServer = FindServer(user->server);
4730                 if (SourceServer)
4731                 {
4732                         SourceServer->DelUserCount();
4733                 }
4734
4735         }
4736
4737         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4738         {
4739                 if (IS_LOCAL(user))
4740                 {
4741                         std::deque<std::string> params;
4742                         params.push_back(user->nick);
4743                         DoOneToMany(oldnick,"NICK",params);
4744                 }
4745         }
4746
4747         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4748         {
4749                 if ((source) && (IS_LOCAL(source)))
4750                 {
4751                         std::deque<std::string> params;
4752                         params.push_back(chan->name);
4753                         params.push_back(user->nick);
4754                         params.push_back(":"+reason);
4755                         DoOneToMany(source->nick,"KICK",params);
4756                 }
4757                 else if (!source)
4758                 {
4759                         std::deque<std::string> params;
4760                         params.push_back(chan->name);
4761                         params.push_back(user->nick);
4762                         params.push_back(":"+reason);
4763                         DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4764                 }
4765         }
4766
4767         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4768         {
4769                 std::deque<std::string> params;
4770                 params.push_back(dest->nick);
4771                 params.push_back(":"+reason);
4772                 DoOneToMany(source->nick,"KILL",params);
4773         }
4774
4775         virtual void OnRehash(const std::string &parameter)
4776         {
4777                 if (parameter != "")
4778                 {
4779                         std::deque<std::string> params;
4780                         params.push_back(parameter);
4781                         DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4782                         // check for self
4783                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4784                         {
4785                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4786                                 ServerInstance->RehashServer();
4787                         }
4788                 }
4789                 ReadConfiguration(false);
4790         }
4791
4792         // note: the protocol does not allow direct umode +o except
4793         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4794         // locally.
4795         virtual void OnOper(userrec* user, const std::string &opertype)
4796         {
4797                 if (IS_LOCAL(user))
4798                 {
4799                         std::deque<std::string> params;
4800                         params.push_back(opertype);
4801                         DoOneToMany(user->nick,"OPERTYPE",params);
4802                 }
4803         }
4804
4805         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4806         {
4807                 if (IS_LOCAL(source))
4808                 {
4809                         char type[8];
4810                         snprintf(type,8,"%cLINE",linetype);
4811                         std::string stype = type;
4812                         if (adding)
4813                         {
4814                                 char sduration[MAXBUF];
4815                                 snprintf(sduration,MAXBUF,"%ld",duration);
4816                                 std::deque<std::string> params;
4817                                 params.push_back(host);
4818                                 params.push_back(sduration);
4819                                 params.push_back(":"+reason);
4820                                 DoOneToMany(source->nick,stype,params);
4821                         }
4822                         else
4823                         {
4824                                 std::deque<std::string> params;
4825                                 params.push_back(host);
4826                                 DoOneToMany(source->nick,stype,params);
4827                         }
4828                 }
4829         }
4830
4831         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4832         {
4833                 OnLine(source,hostmask,true,'G',duration,reason);
4834         }
4835
4836         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4837         {
4838                 OnLine(source,ipmask,true,'Z',duration,reason);
4839         }
4840
4841         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4842         {
4843                 OnLine(source,nickmask,true,'Q',duration,reason);
4844         }
4845
4846         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4847         {
4848                 OnLine(source,hostmask,true,'E',duration,reason);
4849         }
4850
4851         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4852         {
4853                 OnLine(source,hostmask,false,'G',0,"");
4854         }
4855
4856         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4857         {
4858                 OnLine(source,ipmask,false,'Z',0,"");
4859         }
4860
4861         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4862         {
4863                 OnLine(source,nickmask,false,'Q',0,"");
4864         }
4865
4866         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4867         {
4868                 OnLine(source,hostmask,false,'E',0,"");
4869         }
4870
4871         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4872         {
4873                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4874                 {
4875                         if (target_type == TYPE_USER)
4876                         {
4877                                 userrec* u = (userrec*)dest;
4878                                 std::deque<std::string> params;
4879                                 params.push_back(u->nick);
4880                                 params.push_back(text);
4881                                 DoOneToMany(user->nick,"MODE",params);
4882                         }
4883                         else
4884                         {
4885                                 chanrec* c = (chanrec*)dest;
4886                                 std::deque<std::string> params;
4887                                 params.push_back(c->name);
4888                                 params.push_back(text);
4889                                 DoOneToMany(user->nick,"MODE",params);
4890                         }
4891                 }
4892         }
4893
4894         virtual void OnSetAway(userrec* user)
4895         {
4896                 if (IS_LOCAL(user))
4897                 {
4898                         std::deque<std::string> params;
4899                         params.push_back(":"+std::string(user->awaymsg));
4900                         DoOneToMany(user->nick,"AWAY",params);
4901                 }
4902         }
4903
4904         virtual void OnCancelAway(userrec* user)
4905         {
4906                 if (IS_LOCAL(user))
4907                 {
4908                         std::deque<std::string> params;
4909                         params.clear();
4910                         DoOneToMany(user->nick,"AWAY",params);
4911                 }
4912         }
4913
4914         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4915         {
4916                 TreeSocket* s = (TreeSocket*)opaque;
4917                 if (target)
4918                 {
4919                         if (target_type == TYPE_USER)
4920                         {
4921                                 userrec* u = (userrec*)target;
4922                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4923                         }
4924                         else
4925                         {
4926                                 chanrec* c = (chanrec*)target;
4927                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4928                         }
4929                 }
4930         }
4931
4932         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4933         {
4934                 TreeSocket* s = (TreeSocket*)opaque;
4935                 if (target)
4936                 {
4937                         if (target_type == TYPE_USER)
4938                         {
4939                                 userrec* u = (userrec*)target;
4940                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4941                         }
4942                         else if (target_type == TYPE_OTHER)
4943                         {
4944                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4945                         }
4946                         else if (target_type == TYPE_CHANNEL)
4947                         {
4948                                 chanrec* c = (chanrec*)target;
4949                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4950                         }
4951                 }
4952         }
4953
4954         virtual void OnEvent(Event* event)
4955         {
4956                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4957
4958                 if (event->GetEventID() == "send_metadata")
4959                 {
4960                         if (params->size() < 3)
4961                                 return;
4962                         (*params)[2] = ":" + (*params)[2];
4963                         DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4964                 }
4965                 else if (event->GetEventID() == "send_topic")
4966                 {
4967                         if (params->size() < 2)
4968                                 return;
4969                         (*params)[1] = ":" + (*params)[1];
4970                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
4971                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time()));
4972                         DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
4973                 }
4974                 else if (event->GetEventID() == "send_mode")
4975                 {
4976                         if (params->size() < 2)
4977                                 return;
4978                         // Insert the TS value of the object, either userrec or chanrec
4979                         time_t ourTS = 0;
4980                         userrec* a = ServerInstance->FindNick((*params)[0]);
4981                         if (a)
4982                         {
4983                                 ourTS = a->age;
4984                         }
4985                         else
4986                         {
4987                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4988                                 if (a)
4989                                 {
4990                                         ourTS = a->age;
4991                                 }
4992                         }
4993                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4994                         DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4995                 }
4996         }
4997
4998         virtual ~ModuleSpanningTree()
4999         {
5000                 ServerInstance->Log(DEBUG,"Performing unload of spanningtree!");
5001                 ServerInstance->Log(DEBUG,"Freeing bindings...");
5002                 for (unsigned int i = 0; i < Bindings.size(); i++)
5003                 {
5004                         ServerInstance->Log(DEBUG,"Freeing binding %d of %d",i, Bindings.size());
5005                         ServerInstance->SE->DelFd(Bindings[i]);
5006                         Bindings[i]->Close();
5007                         DELETE(Bindings[i]);
5008                 }
5009                 ServerInstance->Log(DEBUG,"Freeing connected servers...");
5010                 while (TreeRoot->ChildCount())
5011                 {
5012                         TreeServer* child_server = TreeRoot->GetChild(0);
5013                         ServerInstance->Log(DEBUG,"Freeing connected server %s", child_server->GetName().c_str());
5014                         if (child_server)
5015                         {
5016                                 TreeSocket* sock = child_server->GetSocket();
5017                                 ServerInstance->SE->DelFd(sock);
5018                                 sock->Close();
5019                                 DELETE(sock);
5020                         }
5021                 }
5022         }
5023
5024         virtual Version GetVersion()
5025         {
5026                 return Version(1,1,0,2,VF_VENDOR,API_VERSION);
5027         }
5028
5029         void Implements(char* List)
5030         {
5031                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
5032                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
5033                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
5034                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
5035                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
5036                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
5037                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
5038         }
5039
5040         /* It is IMPORTANT that m_spanningtree is the last module in the chain
5041          * so that any activity it sees is FINAL, e.g. we arent going to send out
5042          * a NICK message before m_cloaking has finished putting the +x on the user,
5043          * etc etc.
5044          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
5045          * the module call queue.
5046          */
5047         Priority Prioritize()
5048         {
5049                 return PRIORITY_LAST;
5050         }
5051 };
5052
5053 void DoFailOver(Link* x)
5054 {
5055         TreeProtocolModule->DoFailOver(x);
5056 }
5057
5058 Link* FindLink(const std::string& name)
5059 {
5060         return TreeProtocolModule->FindLink(name);
5061 }
5062
5063 class ModuleSpanningTreeFactory : public ModuleFactory
5064 {
5065  public:
5066         ModuleSpanningTreeFactory()
5067         {
5068         }
5069
5070         ~ModuleSpanningTreeFactory()
5071         {
5072         }
5073
5074         virtual Module * CreateModule(InspIRCd* Me)
5075         {
5076                 TreeProtocolModule = new ModuleSpanningTree(Me);
5077                 return TreeProtocolModule;
5078         }
5079
5080 };
5081
5082
5083 extern "C" void * init_module( void )
5084 {
5085         return new ModuleSpanningTreeFactory;
5086 }