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                                         /* ERROR + CAPAB is still allowed unencryped */
2093                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
2094                                         {
2095                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
2096                                                 if ((nbytes > 0) && (nbytes < 1024))
2097                                                 {
2098                                                         ctx_in->Decrypt(out, result, nbytes, 0);
2099                                                         for (int t = 0; t < nbytes; t++)
2100                                                                 if (result[t] == '\7') result[t] = 0;
2101                                                         ret = result;
2102                                                 }
2103                                         }
2104                                 }
2105                                 if (!this->ProcessLine(ret))
2106                                 {
2107                                         Instance->Log(DEBUG,"ProcessLine says no!");
2108                                         return false;
2109                                 }
2110                         }
2111                         return true;
2112                 }
2113                 /* EAGAIN returns an empty but non-NULL string, so this
2114                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2115                  */
2116                 return (data && !*data);
2117         }
2118
2119         int WriteLine(std::string line)
2120         {
2121                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2122                 if (this->ctx_out)
2123                 {
2124                         char result[10240];
2125                         char result64[10240];
2126                         if (this->keylength)
2127                         {
2128                                 // pad it to the key length
2129                                 int n = this->keylength - (line.length() % this->keylength);
2130                                 if (n)
2131                                         line.append(n,'\7');
2132                         }
2133                         unsigned int ll = line.length();
2134                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2135                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2136                         line = result64;
2137                 }
2138                 return this->Write(line + "\r\n");
2139         }
2140
2141         /* Handle ERROR command */
2142         bool Error(std::deque<std::string> &params)
2143         {
2144                 if (params.size() < 1)
2145                         return false;
2146                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2147                 /* we will return false to cause the socket to close. */
2148                 return false;
2149         }
2150
2151         /** remote MOTD. leet, huh? */
2152         bool Motd(std::string prefix, std::deque<std::string> &params)
2153         {
2154                 if (params.size() > 0)
2155                 {
2156                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2157                         {
2158                                 /* It's for our server */
2159                                 string_list results;
2160                                 userrec* source = this->Instance->FindNick(prefix);
2161
2162                                 if (source)
2163                                 {
2164                                         std::deque<std::string> par;
2165                                         par.push_back(prefix);
2166                                         par.push_back("");
2167
2168                                         if (!Instance->Config->MOTD.size())
2169                                         {
2170                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2171                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2172                                                 return true;
2173                                         }
2174
2175                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2176                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2177
2178                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2179                                         {
2180                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2181                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2182                                         }
2183
2184                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2185                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2186                                 }
2187                         }
2188                         else
2189                         {
2190                                 /* Pass it on */
2191                                 userrec* source = this->Instance->FindNick(prefix);
2192                                 if (source)
2193                                         DoOneToOne(prefix, "MOTD", params, params[0]);
2194                         }
2195                 }
2196                 return true;
2197         }
2198
2199         /** remote ADMIN. leet, huh? */
2200         bool Admin(std::string prefix, std::deque<std::string> &params)
2201         {
2202                 if (params.size() > 0)
2203                 {
2204                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2205                         {
2206                                 /* It's for our server */
2207                                 string_list results;
2208                                 userrec* source = this->Instance->FindNick(prefix);
2209
2210                                 if (source)
2211                                 {
2212                                         std::deque<std::string> par;
2213                                         par.push_back(prefix);
2214                                         par.push_back("");
2215
2216                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2217                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2218
2219                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2220                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2221
2222                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2223                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2224
2225                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2226                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2227                                 }
2228                         }
2229                         else
2230                         {
2231                                 /* Pass it on */
2232                                 userrec* source = this->Instance->FindNick(prefix);
2233                                 if (source)
2234                                         DoOneToOne(prefix, "ADMIN", params, params[0]);
2235                         }
2236                 }
2237                 return true;
2238         }
2239
2240         bool Stats(std::string prefix, std::deque<std::string> &params)
2241         {
2242                 /* Get the reply to a STATS query if it matches this servername,
2243                  * and send it back as a load of PUSH queries
2244                  */
2245                 if (params.size() > 1)
2246                 {
2247                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2248                         {
2249                                 /* It's for our server */
2250                                 string_list results;
2251                                 userrec* source = this->Instance->FindNick(prefix);
2252                                 if (source)
2253                                 {
2254                                         std::deque<std::string> par;
2255                                         par.push_back(prefix);
2256                                         par.push_back("");
2257                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2258                                         for (size_t i = 0; i < results.size(); i++)
2259                                         {
2260                                                 par[1] = "::" + results[i];
2261                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2262                                         }
2263                                 }
2264                         }
2265                         else
2266                         {
2267                                 /* Pass it on */
2268                                 userrec* source = this->Instance->FindNick(prefix);
2269                                 if (source)
2270                                         DoOneToOne(prefix, "STATS", params, params[1]);
2271                         }
2272                 }
2273                 return true;
2274         }
2275
2276
2277         /** Because the core won't let users or even SERVERS set +o,
2278          * we use the OPERTYPE command to do this.
2279          */
2280         bool OperType(std::string prefix, std::deque<std::string> &params)
2281         {
2282                 if (params.size() != 1)
2283                 {
2284                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2285                         return true;
2286                 }
2287                 std::string opertype = params[0];
2288                 userrec* u = this->Instance->FindNick(prefix);
2289                 if (u)
2290                 {
2291                         u->modes[UM_OPERATOR] = 1;
2292                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2293                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2294                 }
2295                 return true;
2296         }
2297
2298         /** Because Andy insists that services-compatible servers must
2299          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2300          */
2301         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2302         {
2303                 if (params.size() < 3)
2304                         return true;
2305
2306                 userrec* u = this->Instance->FindNick(params[0]);
2307
2308                 if (u)
2309                 {
2310                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2311                         if (IS_LOCAL(u))
2312                         {
2313                                 std::deque<std::string> par;
2314                                 par.push_back(params[1]);
2315                                 /* This is not required as one is sent in OnUserPostNick below
2316                                  */
2317                                 //DoOneToMany(u->nick,"NICK",par);
2318                                 if (!u->ForceNickChange(params[1].c_str()))
2319                                 {
2320                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2321                                         return true;
2322                                 }
2323                                 u->age = atoi(params[2].c_str());
2324                         }
2325                 }
2326                 return true;
2327         }
2328
2329         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2330         {
2331                 if (params.size() < 2)
2332                         return true;
2333
2334                 userrec* u = this->Instance->FindNick(params[0]);
2335
2336                 if (u)
2337                 {
2338                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2339                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2340                 }
2341                 return true;
2342         }
2343
2344         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2345         {
2346                 if (params.size() < 1)
2347                         return false;
2348
2349                 std::string servermask = params[0];
2350
2351                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2352                 {
2353                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2354                         this->Instance->RehashServer();
2355                         ReadConfiguration(false);
2356                         InitializeDisabledCommands(ServerInstance->Config->DisabledCommands, ServerInstance);
2357                 }
2358                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2359                 return true;
2360         }
2361
2362         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2363         {
2364                 if (params.size() != 2)
2365                         return true;
2366
2367                 std::string nick = params[0];
2368                 userrec* u = this->Instance->FindNick(prefix);
2369                 userrec* who = this->Instance->FindNick(nick);
2370
2371                 if (who)
2372                 {
2373                         /* Prepend kill source, if we don't have one */
2374                         std::string sourceserv = prefix;
2375                         if (u)
2376                         {
2377                                 sourceserv = u->server;
2378                         }
2379                         if (*(params[1].c_str()) != '[')
2380                         {
2381                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2382                         }
2383                         std::string reason = params[1];
2384                         params[1] = ":" + params[1];
2385                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2386                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2387                         userrec::QuitUser(this->Instance,who,reason);
2388                 }
2389                 return true;
2390         }
2391
2392         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2393         {
2394                 if (params.size() < 1)
2395                         return true;
2396
2397                 if (params.size() == 1)
2398                 {
2399                         TreeServer* ServerSource = FindServer(prefix);
2400                         if (ServerSource)
2401                         {
2402                                 ServerSource->SetPingFlag();
2403                         }
2404                 }
2405                 else
2406                 {
2407                         std::string forwardto = params[1];
2408                         if (forwardto == this->Instance->Config->ServerName)
2409                         {
2410                                 /*
2411                                  * this is a PONG for us
2412                                  * if the prefix is a user, check theyre local, and if they are,
2413                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2414                                  * Services might want to send these s->s, but we dont need to yet.
2415                                  */
2416                                 userrec* u = this->Instance->FindNick(prefix);
2417
2418                                 if (u)
2419                                 {
2420                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2421                                 }
2422                         }
2423                         else
2424                         {
2425                                 // not for us, pass it on :)
2426                                 DoOneToOne(prefix,"PONG",params,forwardto);
2427                         }
2428                 }
2429
2430                 return true;
2431         }
2432
2433         bool MetaData(std::string prefix, std::deque<std::string> &params)
2434         {
2435                 if (params.size() < 3)
2436                         return true;
2437
2438                 TreeServer* ServerSource = FindServer(prefix);
2439
2440                 if (ServerSource)
2441                 {
2442                         if (params[0] == "*")
2443                         {
2444                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2445                         }
2446                         else if (*(params[0].c_str()) == '#')
2447                         {
2448                                 chanrec* c = this->Instance->FindChan(params[0]);
2449                                 if (c)
2450                                 {
2451                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2452                                 }
2453                         }
2454                         else if (*(params[0].c_str()) != '#')
2455                         {
2456                                 userrec* u = this->Instance->FindNick(params[0]);
2457                                 if (u)
2458                                 {
2459                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2460                                 }
2461                         }
2462                 }
2463
2464                 params[2] = ":" + params[2];
2465                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2466                 return true;
2467         }
2468
2469         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2470         {
2471                 if (params.size() < 1)
2472                         return true;
2473
2474                 TreeServer* ServerSource = FindServer(prefix);
2475
2476                 if (ServerSource)
2477                 {
2478                         ServerSource->SetVersion(params[0]);
2479                 }
2480                 params[0] = ":" + params[0];
2481                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2482                 return true;
2483         }
2484
2485         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2486         {
2487                 if (params.size() < 1)
2488                         return true;
2489
2490                 userrec* u = this->Instance->FindNick(prefix);
2491
2492                 if (u)
2493                 {
2494                         u->ChangeDisplayedHost(params[0].c_str());
2495                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2496                 }
2497                 return true;
2498         }
2499
2500         bool AddLine(std::string prefix, std::deque<std::string> &params)
2501         {
2502                 if (params.size() < 6)
2503                         return true;
2504
2505                 bool propogate = false;
2506
2507                 switch (*(params[0].c_str()))
2508                 {
2509                         case 'Z':
2510                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2511                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2512                         break;
2513                         case 'Q':
2514                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2515                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2516                         break;
2517                         case 'E':
2518                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2519                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2520                         break;
2521                         case 'G':
2522                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2523                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2524                         break;
2525                         case 'K':
2526                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2527                         break;
2528                         default:
2529                                 /* Just in case... */
2530                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2531                                 propogate = false;
2532                         break;
2533                 }
2534
2535                 /* Send it on its way */
2536                 if (propogate)
2537                 {
2538                         if (atoi(params[4].c_str()))
2539                         {
2540                                 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());
2541                         }
2542                         else
2543                         {
2544                                 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());
2545                         }
2546                         params[5] = ":" + params[5];
2547                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2548                 }
2549                 if (!this->bursting)
2550                 {
2551                         Instance->Log(DEBUG,"Applying lines...");
2552                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2553                 }
2554                 return true;
2555         }
2556
2557         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2558         {
2559                 if (params.size() < 1)
2560                         return true;
2561
2562                 userrec* u = this->Instance->FindNick(prefix);
2563
2564                 if (u)
2565                 {
2566                         u->ChangeName(params[0].c_str());
2567                         params[0] = ":" + params[0];
2568                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2569                 }
2570                 return true;
2571         }
2572
2573         bool Whois(std::string prefix, std::deque<std::string> &params)
2574         {
2575                 if (params.size() < 1)
2576                         return true;
2577
2578                 Instance->Log(DEBUG,"In IDLE command");
2579                 userrec* u = this->Instance->FindNick(prefix);
2580
2581                 if (u)
2582                 {
2583                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2584                         // an incoming request
2585                         if (params.size() == 1)
2586                         {
2587                                 userrec* x = this->Instance->FindNick(params[0]);
2588                                 if ((x) && (IS_LOCAL(x)))
2589                                 {
2590                                         userrec* x = this->Instance->FindNick(params[0]);
2591                                         char signon[MAXBUF];
2592                                         char idle[MAXBUF];
2593
2594                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2595                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2596                                         std::deque<std::string> par;
2597                                         par.push_back(prefix);
2598                                         par.push_back(signon);
2599                                         par.push_back(idle);
2600                                         // ours, we're done, pass it BACK
2601                                         DoOneToOne(params[0],"IDLE",par,u->server);
2602                                 }
2603                                 else
2604                                 {
2605                                         // not ours pass it on
2606                                         DoOneToOne(prefix,"IDLE",params,x->server);
2607                                 }
2608                         }
2609                         else if (params.size() == 3)
2610                         {
2611                                 std::string who_did_the_whois = params[0];
2612                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2613                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2614                                 {
2615                                         // an incoming reply to a whois we sent out
2616                                         std::string nick_whoised = prefix;
2617                                         unsigned long signon = atoi(params[1].c_str());
2618                                         unsigned long idle = atoi(params[2].c_str());
2619                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2620                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2621                                 }
2622                                 else
2623                                 {
2624                                         // not ours, pass it on
2625                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2626                                 }
2627                         }
2628                 }
2629                 return true;
2630         }
2631
2632         bool Push(std::string prefix, std::deque<std::string> &params)
2633         {
2634                 if (params.size() < 2)
2635                         return true;
2636
2637                 userrec* u = this->Instance->FindNick(params[0]);
2638
2639                 if (!u)
2640                         return true;
2641
2642                 if (IS_LOCAL(u))
2643                 {
2644                         u->Write(params[1]);
2645                 }
2646                 else
2647                 {
2648                         // continue the raw onwards
2649                         params[1] = ":" + params[1];
2650                         DoOneToOne(prefix,"PUSH",params,u->server);
2651                 }
2652                 return true;
2653         }
2654
2655         bool Time(std::string prefix, std::deque<std::string> &params)
2656         {
2657                 // :source.server TIME remote.server sendernick
2658                 // :remote.server TIME source.server sendernick TS
2659                 if (params.size() == 2)
2660                 {
2661                         // someone querying our time?
2662                         if (this->Instance->Config->ServerName == params[0])
2663                         {
2664                                 userrec* u = this->Instance->FindNick(params[1]);
2665                                 if (u)
2666                                 {
2667                                         char curtime[256];
2668                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2669                                         params.push_back(curtime);
2670                                         params[0] = prefix;
2671                                         DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2672                                 }
2673                         }
2674                         else
2675                         {
2676                                 // not us, pass it on
2677                                 userrec* u = this->Instance->FindNick(params[1]);
2678                                 if (u)
2679                                         DoOneToOne(prefix,"TIME",params,params[0]);
2680                         }
2681                 }
2682                 else if (params.size() == 3)
2683                 {
2684                         // a response to a previous TIME
2685                         userrec* u = this->Instance->FindNick(params[1]);
2686                         if ((u) && (IS_LOCAL(u)))
2687                         {
2688                         time_t rawtime = atol(params[2].c_str());
2689                         struct tm * timeinfo;
2690                         timeinfo = localtime(&rawtime);
2691                                 char tms[26];
2692                                 snprintf(tms,26,"%s",asctime(timeinfo));
2693                                 tms[24] = 0;
2694                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2695                         }
2696                         else
2697                         {
2698                                 if (u)
2699                                         DoOneToOne(prefix,"TIME",params,u->server);
2700                         }
2701                 }
2702                 return true;
2703         }
2704
2705         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2706         {
2707                 if (params.size() < 1)
2708                         return true;
2709
2710                 if (params.size() == 1)
2711                 {
2712                         std::string stufftobounce = params[0];
2713                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2714                         return true;
2715                 }
2716                 else
2717                 {
2718                         std::string forwardto = params[1];
2719                         if (forwardto == this->Instance->Config->ServerName)
2720                         {
2721                                 // this is a ping for us, send back PONG to the requesting server
2722                                 params[1] = params[0];
2723                                 params[0] = forwardto;
2724                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2725                         }
2726                         else
2727                         {
2728                                 // not for us, pass it on :)
2729                                 DoOneToOne(prefix,"PING",params,forwardto);
2730                         }
2731                         return true;
2732                 }
2733         }
2734
2735         bool RemoveStatus(std::string prefix, std::deque<std::string> &params)
2736         {
2737                 if (params.size() < 1)
2738                         return true;
2739
2740                 chanrec* c = Instance->FindChan(params[0]);
2741
2742                 if (c)
2743                 {
2744                         irc::modestacker modestack(false);
2745                         CUList *ulist = c->GetUsers();
2746                         const char* y[127];
2747                         std::deque<std::string> stackresult;
2748                         std::string x;
2749
2750                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2751                         {
2752                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2753                                 if (modesequence.length())
2754                                 {
2755                                         ServerInstance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2756                                         irc::spacesepstream sep(modesequence);
2757                                         std::string modeletters = sep.GetToken();
2758                                         ServerInstance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2759
2760                                         while (!modeletters.empty())
2761                                         {
2762                                                 char mletter = *(modeletters.begin());
2763                                                 modestack.Push(mletter,sep.GetToken());
2764                                                 ServerInstance->Log(DEBUG,"Push letter = '%c'",mletter);
2765                                                 modeletters.erase(modeletters.begin());
2766                                                 ServerInstance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2767                                         }
2768                                 }
2769                         }
2770
2771                         while (modestack.GetStackedLine(stackresult))
2772                         {
2773                                 ServerInstance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2774                                 stackresult.push_front(ConvToStr(c->age));
2775                                 stackresult.push_front(c->name);
2776                                 DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2777                                 stackresult.erase(stackresult.begin() + 1);
2778                                 ServerInstance->Log(DEBUG,"Stacked items:");
2779                                 for (size_t z = 0; z < stackresult.size(); z++)
2780                                 {
2781                                         y[z] = stackresult[z].c_str();
2782                                         ServerInstance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2783                                 }
2784                                 userrec* n = new userrec(Instance);
2785                                 n->SetFd(FD_MAGIC_NUMBER);
2786                                 Instance->SendMode(y, stackresult.size(), n);
2787                                 delete n;
2788                         }
2789                 }
2790                 return true;
2791         }
2792
2793         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2794         {
2795                 if (params.size() < 4)
2796                         return false;
2797
2798                 std::string servername = params[0];
2799                 std::string password = params[1];
2800                 // hopcount is not used for a remote server, we calculate this ourselves
2801                 std::string description = params[3];
2802                 TreeServer* ParentOfThis = FindServer(prefix);
2803
2804                 if (!ParentOfThis)
2805                 {
2806                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2807                         return false;
2808                 }
2809                 TreeServer* CheckDupe = FindServer(servername);
2810                 if (CheckDupe)
2811                 {
2812                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2813                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2814                         return false;
2815                 }
2816                 TreeServer* Node = new TreeServer(this->Instance,servername,description,ParentOfThis,NULL);
2817                 ParentOfThis->AddChild(Node);
2818                 params[3] = ":" + params[3];
2819                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2820                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2821                 return true;
2822         }
2823
2824         bool Outbound_Reply_Server(std::deque<std::string> &params)
2825         {
2826                 if (params.size() < 4)
2827                         return false;
2828
2829                 irc::string servername = params[0].c_str();
2830                 std::string sname = params[0];
2831                 std::string password = params[1];
2832                 int hops = atoi(params[2].c_str());
2833
2834                 if (hops)
2835                 {
2836                         this->WriteLine("ERROR :Server too far away for authentication");
2837                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2838                         return false;
2839                 }
2840                 std::string description = params[3];
2841                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2842                 {
2843                         if ((x->Name == servername) && (x->RecvPass == password))
2844                         {
2845                                 TreeServer* CheckDupe = FindServer(sname);
2846                                 if (CheckDupe)
2847                                 {
2848                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2849                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2850                                         return false;
2851                                 }
2852                                 // Begin the sync here. this kickstarts the
2853                                 // other side, waiting in WAIT_AUTH_2 state,
2854                                 // into starting their burst, as it shows
2855                                 // that we're happy.
2856                                 this->LinkState = CONNECTED;
2857                                 // we should add the details of this server now
2858                                 // to the servers tree, as a child of the root
2859                                 // node.
2860                                 TreeServer* Node = new TreeServer(this->Instance,sname,description,TreeRoot,this);
2861                                 TreeRoot->AddChild(Node);
2862                                 params[3] = ":" + params[3];
2863                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2864                                 this->bursting = true;
2865                                 this->DoBurst(Node);
2866                                 return true;
2867                         }
2868                 }
2869                 this->WriteLine("ERROR :Invalid credentials");
2870                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2871                 return false;
2872         }
2873
2874         bool Inbound_Server(std::deque<std::string> &params)
2875         {
2876                 if (params.size() < 4)
2877                         return false;
2878
2879                 irc::string servername = params[0].c_str();
2880                 std::string sname = params[0];
2881                 std::string password = params[1];
2882                 int hops = atoi(params[2].c_str());
2883
2884                 if (hops)
2885                 {
2886                         this->WriteLine("ERROR :Server too far away for authentication");
2887                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2888                         return false;
2889                 }
2890                 std::string description = params[3];
2891                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2892                 {
2893                         if ((x->Name == servername) && (x->RecvPass == password))
2894                         {
2895                                 TreeServer* CheckDupe = FindServer(sname);
2896                                 if (CheckDupe)
2897                                 {
2898                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2899                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2900                                         return false;
2901                                 }
2902                                 /* If the config says this link is encrypted, but the remote side
2903                                  * hasnt bothered to send the AES command before SERVER, then we
2904                                  * boot them off as we MUST have this connection encrypted.
2905                                  */
2906                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2907                                 {
2908                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2909                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2910                                         return false;
2911                                 }
2912                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2913                                 this->InboundServerName = sname;
2914                                 this->InboundDescription = description;
2915                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2916                                 // along with the sendpass from this block.
2917                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2918                                 // move to the next state, we are now waiting for THEM.
2919                                 this->LinkState = WAIT_AUTH_2;
2920                                 return true;
2921                         }
2922                 }
2923                 this->WriteLine("ERROR :Invalid credentials");
2924                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2925                 return false;
2926         }
2927
2928         void Split(std::string line, std::deque<std::string> &n)
2929         {
2930                 n.clear();
2931                 irc::tokenstream tokens(line);
2932                 std::string param;
2933                 while ((param = tokens.GetToken()) != "")
2934                         n.push_back(param);
2935                 return;
2936         }
2937
2938         bool ProcessLine(std::string line)
2939         {
2940                 std::deque<std::string> params;
2941                 irc::string command;
2942                 std::string prefix;
2943
2944                 if (line.empty())
2945                         return true;
2946
2947                 line = line.substr(0, line.find_first_of("\r\n"));
2948
2949                 Instance->Log(DEBUG,"IN: %s", line.c_str());
2950
2951                 this->Split(line.c_str(),params);
2952
2953                 if ((params[0][0] == ':') && (params.size() > 1))
2954                 {
2955                         prefix = params[0].substr(1);
2956                         params.pop_front();
2957                 }
2958
2959                 command = params[0].c_str();
2960                 params.pop_front();
2961
2962                 if ((!this->ctx_in) && (command == "AES"))
2963                 {
2964                         std::string sserv = params[0];
2965                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2966                         {
2967                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2968                                 {
2969                                         this->InitAES(x->EncryptionKey,sserv);
2970                                 }
2971                         }
2972
2973                         return true;
2974                 }
2975                 else if ((this->ctx_in) && (command == "AES"))
2976                 {
2977                         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());
2978                 }
2979
2980                 switch (this->LinkState)
2981                 {
2982                         TreeServer* Node;
2983
2984                         case WAIT_AUTH_1:
2985                                 // Waiting for SERVER command from remote server. Server initiating
2986                                 // the connection sends the first SERVER command, listening server
2987                                 // replies with theirs if its happy, then if the initiator is happy,
2988                                 // it starts to send its net sync, which starts the merge, otherwise
2989                                 // it sends an ERROR.
2990                                 if (command == "PASS")
2991                                 {
2992                                         /* Silently ignored */
2993                                 }
2994                                 else if (command == "SERVER")
2995                                 {
2996                                         return this->Inbound_Server(params);
2997                                 }
2998                                 else if (command == "ERROR")
2999                                 {
3000                                         return this->Error(params);
3001                                 }
3002                                 else if (command == "USER")
3003                                 {
3004                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
3005                                         return false;
3006                                 }
3007                                 else if (command == "CAPAB")
3008                                 {
3009                                         return this->Capab(params);
3010                                 }
3011                                 else if ((command == "U") || (command == "S"))
3012                                 {
3013                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3014                                         return false;
3015                                 }
3016                                 else
3017                                 {
3018                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
3019                                         return false;
3020                                 }
3021                         break;
3022                         case WAIT_AUTH_2:
3023                                 // Waiting for start of other side's netmerge to say they liked our
3024                                 // password.
3025                                 if (command == "SERVER")
3026                                 {
3027                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
3028                                         // silently ignore.
3029                                         return true;
3030                                 }
3031                                 else if ((command == "U") || (command == "S"))
3032                                 {
3033                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3034                                         return false;
3035                                 }
3036                                 else if (command == "BURST")
3037                                 {
3038                                         if (params.size())
3039                                         {
3040                                                 /* If a time stamp is provided, try and check syncronization */
3041                                                 time_t THEM = atoi(params[0].c_str());
3042                                                 long delta = THEM-time(NULL);
3043                                                 if ((delta < -600) || (delta > 600))
3044                                                 {
3045                                                         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));
3046                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
3047                                                         return false;
3048                                                 }
3049                                                 else if ((delta < -60) || (delta > 60))
3050                                                 {
3051                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
3052                                                 }
3053                                         }
3054                                         this->LinkState = CONNECTED;
3055                                         Node = new TreeServer(this->Instance,InboundServerName,InboundDescription,TreeRoot,this);
3056                                         TreeRoot->AddChild(Node);
3057                                         params.clear();
3058                                         params.push_back(InboundServerName);
3059                                         params.push_back("*");
3060                                         params.push_back("1");
3061                                         params.push_back(":"+InboundDescription);
3062                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
3063                                         this->bursting = true;
3064                                         this->DoBurst(Node);
3065                                 }
3066                                 else if (command == "ERROR")
3067                                 {
3068                                         return this->Error(params);
3069                                 }
3070                                 else if (command == "CAPAB")
3071                                 {
3072                                         return this->Capab(params);
3073                                 }
3074
3075                         break;
3076                         case LISTENER:
3077                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
3078                                 return false;
3079                         break;
3080                         case CONNECTING:
3081                                 if (command == "SERVER")
3082                                 {
3083                                         // another server we connected to, which was in WAIT_AUTH_1 state,
3084                                         // has just sent us their credentials. If we get this far, theyre
3085                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
3086                                         // if we're happy with this, we should send our netburst which
3087                                         // kickstarts the merge.
3088                                         return this->Outbound_Reply_Server(params);
3089                                 }
3090                                 else if (command == "ERROR")
3091                                 {
3092                                         return this->Error(params);
3093                                 }
3094                         break;
3095                         case CONNECTED:
3096                                 // This is the 'authenticated' state, when all passwords
3097                                 // have been exchanged and anything past this point is taken
3098                                 // as gospel.
3099
3100                                 if (prefix != "")
3101                                 {
3102                                         std::string direction = prefix;
3103                                         userrec* t = this->Instance->FindNick(prefix);
3104                                         if (t)
3105                                         {
3106                                                 direction = t->server;
3107                                         }
3108                                         TreeServer* route_back_again = BestRouteTo(direction);
3109                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3110                                         {
3111                                                 if (route_back_again)
3112                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3113                                                 return true;
3114                                         }
3115
3116                                         /* Fix by brain:
3117                                          * When there is activity on the socket, reset the ping counter so
3118                                          * that we're not wasting bandwidth pinging an active server.
3119                                          */
3120                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3121                                         route_back_again->SetPingFlag();
3122                                 }
3123
3124                                 if (command == "SVSMODE")
3125                                 {
3126                                         /* Services expects us to implement
3127                                          * SVSMODE. In inspircd its the same as
3128                                          * MODE anyway.
3129                                          */
3130                                         command = "MODE";
3131                                 }
3132                                 std::string target = "";
3133                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3134                                  * working with std::string here.
3135                                  */
3136                                 if ((command == "NICK") && (params.size() > 1))
3137                                 {
3138                                         return this->IntroduceClient(prefix,params);
3139                                 }
3140                                 else if (command == "FJOIN")
3141                                 {
3142                                         return this->ForceJoin(prefix,params);
3143                                 }
3144                                 else if (command == "STATS")
3145                                 {
3146                                         return this->Stats(prefix, params);
3147                                 }
3148                                 else if (command == "MOTD")
3149                                 {
3150                                         return this->Motd(prefix, params);
3151                                 }
3152                                 else if (command == "ADMIN")
3153                                 {
3154                                         return this->Admin(prefix, params);
3155                                 }
3156                                 else if (command == "SERVER")
3157                                 {
3158                                         return this->RemoteServer(prefix,params);
3159                                 }
3160                                 else if (command == "ERROR")
3161                                 {
3162                                         return this->Error(params);
3163                                 }
3164                                 else if (command == "OPERTYPE")
3165                                 {
3166                                         return this->OperType(prefix,params);
3167                                 }
3168                                 else if (command == "FMODE")
3169                                 {
3170                                         return this->ForceMode(prefix,params);
3171                                 }
3172                                 else if (command == "KILL")
3173                                 {
3174                                         return this->RemoteKill(prefix,params);
3175                                 }
3176                                 else if (command == "FTOPIC")
3177                                 {
3178                                         return this->ForceTopic(prefix,params);
3179                                 }
3180                                 else if (command == "REHASH")
3181                                 {
3182                                         return this->RemoteRehash(prefix,params);
3183                                 }
3184                                 else if (command == "METADATA")
3185                                 {
3186                                         return this->MetaData(prefix,params);
3187                                 }
3188                                 else if (command == "REMSTATUS")
3189                                 {
3190                                         return this->RemoveStatus(prefix,params);
3191                                 }
3192                                 else if (command == "PING")
3193                                 {
3194                                         /*
3195                                          * We just got a ping from a server that's bursting.
3196                                          * This can't be right, so set them to not bursting, and
3197                                          * apply their lines.
3198                                          */
3199                                         if (this->bursting)
3200                                         {
3201                                                 this->bursting = false;
3202                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3203                                         }
3204                                         if (prefix == "")
3205                                         {
3206                                                 prefix = this->GetName();
3207                                         }
3208                                         return this->LocalPing(prefix,params);
3209                                 }
3210                                 else if (command == "PONG")
3211                                 {
3212                                         /*
3213                                          * We just got a pong from a server that's bursting.
3214                                          * This can't be right, so set them to not bursting, and
3215                                          * apply their lines.
3216                                          */
3217                                         if (this->bursting)
3218                                         {
3219                                                 this->bursting = false;
3220                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3221                                         }
3222                                         if (prefix == "")
3223                                         {
3224                                                 prefix = this->GetName();
3225                                         }
3226                                         return this->LocalPong(prefix,params);
3227                                 }
3228                                 else if (command == "VERSION")
3229                                 {
3230                                         return this->ServerVersion(prefix,params);
3231                                 }
3232                                 else if (command == "FHOST")
3233                                 {
3234                                         return this->ChangeHost(prefix,params);
3235                                 }
3236                                 else if (command == "FNAME")
3237                                 {
3238                                         return this->ChangeName(prefix,params);
3239                                 }
3240                                 else if (command == "ADDLINE")
3241                                 {
3242                                         return this->AddLine(prefix,params);
3243                                 }
3244                                 else if (command == "SVSNICK")
3245                                 {
3246                                         if (prefix == "")
3247                                         {
3248                                                 prefix = this->GetName();
3249                                         }
3250                                         return this->ForceNick(prefix,params);
3251                                 }
3252                                 else if (command == "IDLE")
3253                                 {
3254                                         return this->Whois(prefix,params);
3255                                 }
3256                                 else if (command == "PUSH")
3257                                 {
3258                                         return this->Push(prefix,params);
3259                                 }
3260                                 else if (command == "TIME")
3261                                 {
3262                                         return this->Time(prefix,params);
3263                                 }
3264                                 else if ((command == "KICK") && (IsServer(prefix)))
3265                                 {
3266                                         std::string sourceserv = this->myhost;
3267                                         if (params.size() == 3)
3268                                         {
3269                                                 userrec* user = this->Instance->FindNick(params[1]);
3270                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3271                                                 if (user && chan)
3272                                                 {
3273                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3274                                                                 /* Yikes, the channels gone! */
3275                                                                 delete chan;
3276                                                 }
3277                                         }
3278                                         if (this->InboundServerName != "")
3279                                         {
3280                                                 sourceserv = this->InboundServerName;
3281                                         }
3282                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3283                                 }
3284                                 else if (command == "SVSJOIN")
3285                                 {
3286                                         if (prefix == "")
3287                                         {
3288                                                 prefix = this->GetName();
3289                                         }
3290                                         return this->ServiceJoin(prefix,params);
3291                                 }
3292                                 else if (command == "SQUIT")
3293                                 {
3294                                         if (params.size() == 2)
3295                                         {
3296                                                 this->Squit(FindServer(params[0]),params[1]);
3297                                         }
3298                                         return true;
3299                                 }
3300                                 else if (command == "ENDBURST")
3301                                 {
3302                                         this->bursting = false;
3303                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3304                                         std::string sourceserv = this->myhost;
3305                                         if (this->InboundServerName != "")
3306                                         {
3307                                                 sourceserv = this->InboundServerName;
3308                                         }
3309                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3310                                         return true;
3311                                 }
3312                                 else
3313                                 {
3314                                         // not a special inter-server command.
3315                                         // Emulate the actual user doing the command,
3316                                         // this saves us having a huge ugly parser.
3317                                         userrec* who = this->Instance->FindNick(prefix);
3318                                         std::string sourceserv = this->myhost;
3319                                         if (this->InboundServerName != "")
3320                                         {
3321                                                 sourceserv = this->InboundServerName;
3322                                         }
3323                                         if (who)
3324                                         {
3325                                                 if ((command == "NICK") && (params.size() > 0))
3326                                                 {
3327                                                         /* On nick messages, check that the nick doesnt
3328                                                          * already exist here. If it does, kill their copy,
3329                                                          * and our copy.
3330                                                          */
3331                                                         userrec* x = this->Instance->FindNick(params[0]);
3332                                                         if ((x) && (x != who))
3333                                                         {
3334                                                                 std::deque<std::string> p;
3335                                                                 p.push_back(params[0]);
3336                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3337                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3338                                                                 p.clear();
3339                                                                 p.push_back(prefix);
3340                                                                 p.push_back("Nickname collision");
3341                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3342                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3343                                                                 userrec* y = this->Instance->FindNick(prefix);
3344                                                                 if (y)
3345                                                                 {
3346                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3347                                                                 }
3348                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3349                                                         }
3350                                                 }
3351                                                 // its a user
3352                                                 target = who->server;
3353                                                 const char* strparams[127];
3354                                                 for (unsigned int q = 0; q < params.size(); q++)
3355                                                 {
3356                                                         strparams[q] = params[q].c_str();
3357                                                 }
3358                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3359                                                 {
3360                                                         case CMD_INVALID:
3361                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3362                                                                 return false;
3363                                                         break;
3364                                                         case CMD_FAILURE:
3365                                                                 return true;
3366                                                         break;
3367                                                         default:
3368                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3369                                                         break;
3370                                                 }
3371                                         }
3372                                         else
3373                                         {
3374                                                 // its not a user. Its either a server, or somethings screwed up.
3375                                                 if (IsServer(prefix))
3376                                                 {
3377                                                         target = this->Instance->Config->ServerName;
3378                                                 }
3379                                                 else
3380                                                 {
3381                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3382                                                         return true;
3383                                                 }
3384                                         }
3385                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3386
3387                                 }
3388                                 return true;
3389                         break;
3390                 }
3391                 return true;
3392         }
3393
3394         virtual std::string GetName()
3395         {
3396                 std::string sourceserv = this->myhost;
3397                 if (this->InboundServerName != "")
3398                 {
3399                         sourceserv = this->InboundServerName;
3400                 }
3401                 return sourceserv;
3402         }
3403
3404         virtual void OnTimeout()
3405         {
3406                 if (this->LinkState == CONNECTING)
3407                 {
3408                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3409                         Link* MyLink = FindLink(myhost);
3410                         if (MyLink)
3411                                 DoFailOver(MyLink);
3412                 }
3413         }
3414
3415         virtual void OnClose()
3416         {
3417                 // Connection closed.
3418                 // If the connection is fully up (state CONNECTED)
3419                 // then propogate a netsplit to all peers.
3420                 std::string quitserver = this->myhost;
3421                 if (this->InboundServerName != "")
3422                 {
3423                         quitserver = this->InboundServerName;
3424                 }
3425                 TreeServer* s = FindServer(quitserver);
3426                 if (s)
3427                 {
3428                         Squit(s,"Remote host closed the connection");
3429                 }
3430                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3431         }
3432
3433         virtual int OnIncomingConnection(int newsock, char* ip)
3434         {
3435                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3436                  * or discovering if this port is the server port, we don't allow connections from any
3437                  * IPs for which we don't have a link block.
3438                  */
3439                 bool found = false;
3440
3441                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3442                 if (!found)
3443                 {
3444                         for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
3445                                 if (MatchCIDR(ip, (*i).c_str()))
3446                                         found = true;
3447
3448                         if (!found)
3449                         {
3450                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3451                                 close(newsock);
3452                                 return false;
3453                         }
3454                 }
3455                 TreeSocket* s = new TreeSocket(this->Instance, newsock, ip);
3456                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3457                 return true;
3458         }
3459 };
3460
3461 /** This class is used to resolve server hostnames during /connect and autoconnect.
3462  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3463  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3464  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3465  * will have an IP address which we can then use to continue our connection.
3466  */
3467 class ServernameResolver : public Resolver
3468 {
3469  private:
3470         /** A copy of the Link tag info for what we're connecting to.
3471          * We take a copy, rather than using a pointer, just in case the
3472          * admin takes the tag away and rehashes while the domain is resolving.
3473          */
3474         Link MyLink;
3475  public:
3476         ServernameResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3477         {
3478                 /* Nothing in here, folks */
3479         }
3480
3481         void OnLookupComplete(const std::string &result)
3482         {
3483                 /* Initiate the connection, now that we have an IP to use.
3484                  * Passing a hostname directly to InspSocket causes it to
3485                  * just bail and set its FD to -1.
3486                  */
3487                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3488                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3489                 {
3490                         TreeSocket* newsocket = new TreeSocket(ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3491                         if (newsocket->GetFd() > -1)
3492                         {
3493                                 /* We're all OK */
3494                         }
3495                         else
3496                         {
3497                                 /* Something barfed, show the opers */
3498                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3499                                 delete newsocket;
3500                                 DoFailOver(&MyLink);
3501                         }
3502                 }
3503         }
3504
3505         void OnError(ResolverError e, const std::string &errormessage)
3506         {
3507                 /* Ooops! */
3508                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3509                 DoFailOver(&MyLink);
3510         }
3511 };
3512
3513 class SecurityIPResolver : public Resolver
3514 {
3515  private:
3516         Link MyLink;
3517  public:
3518         SecurityIPResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3519         {
3520         }
3521
3522         void OnLookupComplete(const std::string &result)
3523         {
3524                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3525                 ValidIPs.push_back(result);
3526         }
3527
3528         void OnError(ResolverError e, const std::string &errormessage)
3529         {
3530                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3531         }
3532 };
3533
3534 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3535 {
3536         for (unsigned int c = 0; c < list.size(); c++)
3537         {
3538                 if (list[c] == server)
3539                 {
3540                         return;
3541                 }
3542         }
3543         list.push_back(server);
3544 }
3545
3546 /** returns a list of DIRECT servernames for a specific channel */
3547 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3548 {
3549         CUList *ulist = c->GetUsers();
3550         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3551         {
3552                 if (i->second->GetFd() < 0)
3553                 {
3554                         TreeServer* best = BestRouteTo(i->second->server);
3555                         if (best)
3556                                 AddThisServer(best,list);
3557                 }
3558         }
3559         return;
3560 }
3561
3562 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3563 {
3564         TreeServer* omitroute = BestRouteTo(omit);
3565         if ((command == "NOTICE") || (command == "PRIVMSG"))
3566         {
3567                 if (params.size() >= 2)
3568                 {
3569                         /* Prefixes */
3570                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3571                         {
3572                                 params[0] = params[0].substr(1, params[0].length()-1);
3573                         }
3574                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3575                         {
3576                                 // special routing for private messages/notices
3577                                 userrec* d = ServerInstance->FindNick(params[0]);
3578                                 if (d)
3579                                 {
3580                                         std::deque<std::string> par;
3581                                         par.push_back(params[0]);
3582                                         par.push_back(":"+params[1]);
3583                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3584                                         return true;
3585                                 }
3586                         }
3587                         else if (*(params[0].c_str()) == '$')
3588                         {
3589                                 std::deque<std::string> par;
3590                                 par.push_back(params[0]);
3591                                 par.push_back(":"+params[1]);
3592                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3593                                 return true;
3594                         }
3595                         else
3596                         {
3597                                 ServerInstance->Log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3598                                 chanrec* c = ServerInstance->FindChan(params[0]);
3599                                 if (c)
3600                                 {
3601                                         std::deque<TreeServer*> list;
3602                                         GetListOfServersForChannel(c,list);
3603                                         ServerInstance->Log(DEBUG,"Got a list of %d servers",list.size());
3604                                         unsigned int lsize = list.size();
3605                                         for (unsigned int i = 0; i < lsize; i++)
3606                                         {
3607                                                 TreeSocket* Sock = list[i]->GetSocket();
3608                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3609                                                 {
3610                                                         ServerInstance->Log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3611                                                         Sock->WriteLine(data);
3612                                                 }
3613                                         }
3614                                         return true;
3615                                 }
3616                         }
3617                 }
3618         }
3619         unsigned int items = TreeRoot->ChildCount();
3620         for (unsigned int x = 0; x < items; x++)
3621         {
3622                 TreeServer* Route = TreeRoot->GetChild(x);
3623                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3624                 {
3625                         TreeSocket* Sock = Route->GetSocket();
3626                         if (Sock)
3627                                 Sock->WriteLine(data);
3628                 }
3629         }
3630         return true;
3631 }
3632
3633 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3634 {
3635         TreeServer* omitroute = BestRouteTo(omit);
3636         std::string FullLine = ":" + prefix + " " + command;
3637         unsigned int words = params.size();
3638         for (unsigned int x = 0; x < words; x++)
3639         {
3640                 FullLine = FullLine + " " + params[x];
3641         }
3642         unsigned int items = TreeRoot->ChildCount();
3643         for (unsigned int x = 0; x < items; x++)
3644         {
3645                 TreeServer* Route = TreeRoot->GetChild(x);
3646                 // Send the line IF:
3647                 // The route has a socket (its a direct connection)
3648                 // The route isnt the one to be omitted
3649                 // The route isnt the path to the one to be omitted
3650                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3651                 {
3652                         TreeSocket* Sock = Route->GetSocket();
3653                         if (Sock)
3654                                 Sock->WriteLine(FullLine);
3655                 }
3656         }
3657         return true;
3658 }
3659
3660 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3661 {
3662         std::string FullLine = ":" + prefix + " " + command;
3663         unsigned int words = params.size();
3664         for (unsigned int x = 0; x < words; x++)
3665         {
3666                 FullLine = FullLine + " " + params[x];
3667         }
3668         unsigned int items = TreeRoot->ChildCount();
3669         for (unsigned int x = 0; x < items; x++)
3670         {
3671                 TreeServer* Route = TreeRoot->GetChild(x);
3672                 if (Route && Route->GetSocket())
3673                 {
3674                         TreeSocket* Sock = Route->GetSocket();
3675                         if (Sock)
3676                                 Sock->WriteLine(FullLine);
3677                 }
3678         }
3679         return true;
3680 }
3681
3682 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3683 {
3684         std::string spfx = prefix;
3685         std::string scmd = command;
3686         return DoOneToMany(spfx, scmd, params);
3687 }
3688
3689 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3690 {
3691         std::string spfx = prefix;
3692         std::string scmd = command;
3693         return DoOneToAllButSender(spfx, scmd, params, omit);
3694 }
3695
3696 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3697 {
3698         TreeServer* Route = BestRouteTo(target);
3699         if (Route)
3700         {
3701                 std::string FullLine = ":" + prefix + " " + command;
3702                 unsigned int words = params.size();
3703                 for (unsigned int x = 0; x < words; x++)
3704                 {
3705                         FullLine = FullLine + " " + params[x];
3706                 }
3707                 if (Route && Route->GetSocket())
3708                 {
3709                         TreeSocket* Sock = Route->GetSocket();
3710                         if (Sock)
3711                                 Sock->WriteLine(FullLine);
3712                 }
3713                 return true;
3714         }
3715         else
3716         {
3717                 return false;
3718         }
3719 }
3720
3721 std::vector<TreeSocket*> Bindings;
3722
3723 void ReadConfiguration(bool rebind)
3724 {
3725         Conf = new ConfigReader(ServerInstance);
3726         if (rebind)
3727         {
3728                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3729                 {
3730                         std::string Type = Conf->ReadValue("bind","type",j);
3731                         std::string IP = Conf->ReadValue("bind","address",j);
3732                         int Port = Conf->ReadInteger("bind","port",j,true);
3733                         if (Type == "servers")
3734                         {
3735                                 ServerInstance->Log(DEBUG,"m_spanningtree: Binding server port %s:%d", IP.c_str(), Port);
3736                                 if (IP == "*")
3737                                 {
3738                                         IP = "";
3739                                 }
3740                                 TreeSocket* listener = new TreeSocket(ServerInstance, IP.c_str(),Port,true,10);
3741                                 if (listener->GetState() == I_LISTENING)
3742                                 {
3743                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), Port);
3744                                         Bindings.push_back(listener);
3745                                 }
3746                                 else
3747                                 {
3748                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3749                                         listener->Close();
3750                                         DELETE(listener);
3751                                 }
3752                                 ServerInstance->Log(DEBUG,"Done with this binding");
3753                         }
3754                 }
3755         }
3756         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3757         HideULines = Conf->ReadFlag("options","hideulines",0);
3758         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
3759         LinkBlocks.clear();
3760         ValidIPs.clear();
3761         for (int j =0; j < Conf->Enumerate("link"); j++)
3762         {
3763                 Link L;
3764                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3765                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3766                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3767                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3768                 L.Port = Conf->ReadInteger("link","port",j,true);
3769                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3770                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3771                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3772                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3773                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3774                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3775                 /* Bugfix by brain, do not allow people to enter bad configurations */
3776                 if (L.Name != ServerInstance->Config->ServerName)
3777                 {
3778                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3779                         {
3780                                 ValidIPs.push_back(L.IPAddr);
3781
3782                                 if (Allow.length())
3783                                         ValidIPs.push_back(Allow);
3784
3785                                 /* Needs resolving */
3786                                 insp_inaddr binip;
3787                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3788                                 {
3789                                         try
3790                                         {
3791                                                 SecurityIPResolver* sr = new SecurityIPResolver(ServerInstance, L.IPAddr, L);
3792                                                 ServerInstance->AddResolver(sr);
3793                                         }
3794                                         catch (ModuleException& e)
3795                                         {
3796                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3797                                         }
3798                                 }
3799
3800                                 LinkBlocks.push_back(L);
3801                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3802                         }
3803                         else
3804                         {
3805                                 if (L.IPAddr == "")
3806                                 {
3807                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3808                                 }
3809                                 else if (L.RecvPass == "")
3810                                 {
3811                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3812                                 }
3813                                 else if (L.SendPass == "")
3814                                 {
3815                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3816                                 }
3817                                 else if (L.Name == "")
3818                                 {
3819                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3820                                 }
3821                                 else if (!L.Port)
3822                                 {
3823                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3824                                 }
3825                         }
3826                 }
3827                 else
3828                 {
3829                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3830                 }
3831         }
3832         DELETE(Conf);
3833 }
3834
3835
3836 class ModuleSpanningTree : public Module
3837 {
3838         int line;
3839         int NumServers;
3840         unsigned int max_local;
3841         unsigned int max_global;
3842         cmd_rconnect* command_rconnect;
3843
3844  public:
3845
3846         ModuleSpanningTree(InspIRCd* Me)
3847                 : Module::Module(Me), max_local(0), max_global(0)
3848         {
3849
3850                 Bindings.clear();
3851
3852                 ::ServerInstance = Me;
3853
3854                 // Create the root of the tree
3855                 TreeRoot = new TreeServer(ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3856
3857                 ReadConfiguration(true);
3858
3859                 command_rconnect = new cmd_rconnect(ServerInstance, this);
3860                 ServerInstance->AddCommand(command_rconnect);
3861         }
3862
3863         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3864         {
3865                 std::string Parent = TreeRoot->GetName();
3866                 if (Current->GetParent())
3867                 {
3868                         Parent = Current->GetParent()->GetName();
3869                 }
3870                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3871                 {
3872                         if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3873                         {
3874                                 if (*user->oper)
3875                                 {
3876                                          ShowLinks(Current->GetChild(q),user,hops+1);
3877                                 }
3878                         }
3879                         else
3880                         {
3881                                 ShowLinks(Current->GetChild(q),user,hops+1);
3882                         }
3883                 }
3884                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3885                 if ((HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3886                         return;
3887                 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());
3888         }
3889
3890         int CountLocalServs()
3891         {
3892                 return TreeRoot->ChildCount();
3893         }
3894
3895         int CountServs()
3896         {
3897                 return serverlist.size();
3898         }
3899
3900         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3901         {
3902                 ShowLinks(TreeRoot,user,0);
3903                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3904                 return;
3905         }
3906
3907         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3908         {
3909                 unsigned int n_users = ServerInstance->UserCount();
3910
3911                 /* Only update these when someone wants to see them, more efficient */
3912                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3913                         max_local = ServerInstance->LocalUserCount();
3914                 if (n_users > max_global)
3915                         max_global = n_users;
3916
3917                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3918                 if (ServerInstance->OperCount())
3919                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3920                 if (ServerInstance->UnregisteredUserCount())
3921                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3922                 if (ServerInstance->ChannelCount())
3923                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3924                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3925                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3926                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3927                 return;
3928         }
3929
3930         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3931
3932         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3933         {
3934                 if (line < 128)
3935                 {
3936                         for (int t = 0; t < depth; t++)
3937                         {
3938                                 matrix[line][t] = ' ';
3939                         }
3940
3941                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3942                         // a 'Spacer' String to compensate.
3943                         char spacer[40];
3944
3945                         memset(spacer,' ',40);
3946                         if ((40 - Current->GetName().length() - depth) > 1) {
3947                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3948                         }
3949                         else
3950                         {
3951                                 spacer[5] = '\0';
3952                         }
3953
3954                         float percent;
3955                         char text[80];
3956                         if (ServerInstance->clientlist.size() == 0) {
3957                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3958                                 percent = 0;
3959                         }
3960                         else
3961                         {
3962                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3963                         }
3964                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3965                         totusers += Current->GetUserCount();
3966                         totservers++;
3967                         strlcpy(&matrix[line][depth],text,80);
3968                         line++;
3969                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3970                         {
3971                                 if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3972                                 {
3973                                         if (*user->oper)
3974                                         {
3975                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3976                                         }
3977                                 }
3978                                 else
3979                                 {
3980                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3981                                 }
3982                         }
3983                 }
3984         }
3985
3986         int HandleMotd(const char** parameters, int pcnt, userrec* user)
3987         {
3988                 if (pcnt > 0)
3989                 {
3990                         /* Remote MOTD, the server is within the 1st parameter */
3991                         std::deque<std::string> params;
3992                         params.push_back(parameters[0]);
3993
3994                         /* Send it out remotely, generate no reply yet */
3995                         TreeServer* s = FindServerMask(parameters[0]);
3996                         if (s)
3997                         {
3998                                 DoOneToOne(user->nick, "MOTD", params, s->GetName());
3999                         }
4000                         else
4001                         {
4002                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4003                         }
4004                         return 1;
4005                 }
4006                 return 0;
4007         }
4008
4009         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
4010         {
4011                 if (pcnt > 0)
4012                 {
4013                         /* Remote ADMIN, the server is within the 1st parameter */
4014                         std::deque<std::string> params;
4015                         params.push_back(parameters[0]);
4016
4017                         /* Send it out remotely, generate no reply yet */
4018                         TreeServer* s = FindServerMask(parameters[0]);
4019                         if (s)
4020                         {
4021                                 DoOneToOne(user->nick, "ADMIN", params, s->GetName());
4022                         }
4023                         else
4024                         {
4025                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4026                         }
4027                         return 1;
4028                 }
4029                 return 0;
4030         }
4031
4032         int HandleStats(const char** parameters, int pcnt, userrec* user)
4033         {
4034                 if (pcnt > 1)
4035                 {
4036                         /* Remote STATS, the server is within the 2nd parameter */
4037                         std::deque<std::string> params;
4038                         params.push_back(parameters[0]);
4039                         params.push_back(parameters[1]);
4040                         /* Send it out remotely, generate no reply yet */
4041                         TreeServer* s = FindServerMask(parameters[1]);
4042                         if (s)
4043                         {
4044                                 params[1] = s->GetName();
4045                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
4046                         }
4047                         else
4048                         {
4049                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4050                         }
4051                         return 1;
4052                 }
4053                 return 0;
4054         }
4055
4056         // Ok, prepare to be confused.
4057         // After much mulling over how to approach this, it struck me that
4058         // the 'usual' way of doing a /MAP isnt the best way. Instead of
4059         // keeping track of a ton of ascii characters, and line by line
4060         // under recursion working out where to place them using multiplications
4061         // and divisons, we instead render the map onto a backplane of characters
4062         // (a character matrix), then draw the branches as a series of "L" shapes
4063         // from the nodes. This is not only friendlier on CPU it uses less stack.
4064
4065         void HandleMap(const char** parameters, int pcnt, userrec* user)
4066         {
4067                 // This array represents a virtual screen which we will
4068                 // "scratch" draw to, as the console device of an irc
4069                 // client does not provide for a proper terminal.
4070                 float totusers = 0;
4071                 float totservers = 0;
4072                 char matrix[128][80];
4073                 for (unsigned int t = 0; t < 128; t++)
4074                 {
4075                         matrix[t][0] = '\0';
4076                 }
4077                 line = 0;
4078                 // The only recursive bit is called here.
4079                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
4080                 // Process each line one by one. The algorithm has a limit of
4081                 // 128 servers (which is far more than a spanning tree should have
4082                 // anyway, so we're ok). This limit can be raised simply by making
4083                 // the character matrix deeper, 128 rows taking 10k of memory.
4084                 for (int l = 1; l < line; l++)
4085                 {
4086                         // scan across the line looking for the start of the
4087                         // servername (the recursive part of the algorithm has placed
4088                         // the servers at indented positions depending on what they
4089                         // are related to)
4090                         int first_nonspace = 0;
4091                         while (matrix[l][first_nonspace] == ' ')
4092                         {
4093                                 first_nonspace++;
4094                         }
4095                         first_nonspace--;
4096                         // Draw the `- (corner) section: this may be overwritten by
4097                         // another L shape passing along the same vertical pane, becoming
4098                         // a |- (branch) section instead.
4099                         matrix[l][first_nonspace] = '-';
4100                         matrix[l][first_nonspace-1] = '`';
4101                         int l2 = l - 1;
4102                         // Draw upwards until we hit the parent server, causing possibly
4103                         // other corners (`-) to become branches (|-)
4104                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
4105                         {
4106                                 matrix[l2][first_nonspace-1] = '|';
4107                                 l2--;
4108                         }
4109                 }
4110                 // dump the whole lot to the user. This is the easy bit, honest.
4111                 for (int t = 0; t < line; t++)
4112                 {
4113                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4114                 }
4115                 float avg_users = totusers / totservers;
4116                 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);
4117         user->WriteServ("007 %s :End of /MAP",user->nick);
4118                 return;
4119         }
4120
4121         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4122         {
4123                 TreeServer* s = FindServerMask(parameters[0]);
4124                 if (s)
4125                 {
4126                         if (s == TreeRoot)
4127                         {
4128                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4129                                 return 1;
4130                         }
4131                         TreeSocket* sock = s->GetSocket();
4132                         if (sock)
4133                         {
4134                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4135                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4136                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
4137                                 ServerInstance->SE->DelFd(sock);
4138                                 sock->Close();
4139                                 delete sock;
4140                         }
4141                         else
4142                         {
4143                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
4144                         }
4145                 }
4146                 else
4147                 {
4148                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4149                 }
4150                 return 1;
4151         }
4152
4153         int HandleTime(const char** parameters, int pcnt, userrec* user)
4154         {
4155                 if ((IS_LOCAL(user)) && (pcnt))
4156                 {
4157                         TreeServer* found = FindServerMask(parameters[0]);
4158                         if (found)
4159                         {
4160                                 // we dont' override for local server
4161                                 if (found == TreeRoot)
4162                                         return 0;
4163
4164                                 std::deque<std::string> params;
4165                                 params.push_back(found->GetName());
4166                                 params.push_back(user->nick);
4167                                 DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4168                         }
4169                         else
4170                         {
4171                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4172                         }
4173                 }
4174                 return 1;
4175         }
4176
4177         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4178         {
4179                 if ((IS_LOCAL(user)) && (pcnt > 1))
4180                 {
4181                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4182                         if ((remote) && (remote->GetFd() < 0))
4183                         {
4184                                 std::deque<std::string> params;
4185                                 params.push_back(parameters[1]);
4186                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
4187                                 return 1;
4188                         }
4189                         else if (!remote)
4190                         {
4191                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4192                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4193                                 return 1;
4194                         }
4195                 }
4196                 return 0;
4197         }
4198
4199         void DoPingChecks(time_t curtime)
4200         {
4201                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
4202                 {
4203                         TreeServer* serv = TreeRoot->GetChild(j);
4204                         TreeSocket* sock = serv->GetSocket();
4205                         if (sock)
4206                         {
4207                                 if (curtime >= serv->NextPingTime())
4208                                 {
4209                                         if (serv->AnsweredLastPing())
4210                                         {
4211                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4212                                                 serv->SetNextPingTime(curtime + 60);
4213                                         }
4214                                         else
4215                                         {
4216                                                 // they didnt answer, boot them
4217                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4218                                                 sock->Squit(serv,"Ping timeout");
4219                                                 ServerInstance->SE->DelFd(sock);
4220                                                 sock->Close();
4221                                                 delete sock;
4222                                                 return;
4223                                         }
4224                                 }
4225                         }
4226                 }
4227         }
4228
4229         void ConnectServer(Link* x)
4230         {
4231                 insp_inaddr binip;
4232
4233                 /* Do we already have an IP? If so, no need to resolve it. */
4234                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4235                 {
4236                         TreeSocket* newsocket = new TreeSocket(ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4237                         if (newsocket->GetFd() > -1)
4238                         {
4239                                 /* Handled automatically on success */
4240                         }
4241                         else
4242                         {
4243                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4244                                 delete newsocket;
4245                                 this->DoFailOver(x);
4246                         }
4247                 }
4248                 else
4249                 {
4250                         try
4251                         {
4252                                 ServernameResolver* snr = new ServernameResolver(ServerInstance,x->IPAddr, *x);
4253                                 ServerInstance->AddResolver(snr);
4254                         }
4255                         catch (ModuleException& e)
4256                         {
4257                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4258                                 this->DoFailOver(x);
4259                         }
4260                 }
4261         }
4262
4263         void DoFailOver(Link* x)
4264         {
4265                 if (x->FailOver.length())
4266                 {
4267                         if (x->FailOver == x->Name)
4268                         {
4269                                 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());
4270                                 return;
4271                         }
4272                         Link* TryThisOne = this->FindLink(x->FailOver.c_str());
4273                         if (TryThisOne)
4274                         {
4275                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
4276                                 ConnectServer(TryThisOne);
4277                         }
4278                         else
4279                         {
4280                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
4281                         }
4282                 }
4283         }
4284
4285         Link* FindLink(const std::string& name)
4286         {
4287                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4288                 {
4289                         if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
4290                         {
4291                                 return &(*x);
4292                         }
4293                 }
4294                 return NULL;
4295         }
4296
4297         void AutoConnectServers(time_t curtime)
4298         {
4299                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4300                 {
4301                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4302                         {
4303                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4304                                 x->NextConnectTime = curtime + x->AutoConnect;
4305                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4306                                 if (x->FailOver.length())
4307                                 {
4308                                         TreeServer* CheckFailOver = FindServer(x->FailOver.c_str());
4309                                         if (CheckFailOver)
4310                                         {
4311                                                 /* The failover for this server is currently a member of the network.
4312                                                  * The failover probably succeeded, where the main link did not.
4313                                                  * Don't try the main link until the failover is gone again.
4314                                                  */
4315                                                 continue;
4316                                         }
4317                                 }
4318                                 if (!CheckDupe)
4319                                 {
4320                                         // an autoconnected server is not connected. Check if its time to connect it
4321                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4322                                         this->ConnectServer(&(*x));
4323                                 }
4324                         }
4325                 }
4326         }
4327
4328         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4329         {
4330                 // we've already checked if pcnt > 0, so this is safe
4331                 TreeServer* found = FindServerMask(parameters[0]);
4332                 if (found)
4333                 {
4334                         std::string Version = found->GetVersion();
4335                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4336                         if (found == TreeRoot)
4337                         {
4338                                 std::stringstream out(ServerInstance->Config->data005);
4339                                 std::string token = "";
4340                                 std::string line5 = "";
4341                                 int token_counter = 0;
4342
4343                                 while (!out.eof())
4344                                 {
4345                                         out >> token;
4346                                         line5 = line5 + token + " ";
4347                                         token_counter++;
4348
4349                                         if ((token_counter >= 13) || (out.eof() == true))
4350                                         {
4351                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4352                                                 line5 = "";
4353                                                 token_counter = 0;
4354                                         }
4355                                 }
4356                         }
4357                 }
4358                 else
4359                 {
4360                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4361                 }
4362                 return 1;
4363         }
4364
4365         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4366         {
4367                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4368                 {
4369                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4370                         {
4371                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4372                                 if (!CheckDupe)
4373                                 {
4374                                         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);
4375                                         ConnectServer(&(*x));
4376                                         return 1;
4377                                 }
4378                                 else
4379                                 {
4380                                         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());
4381                                         return 1;
4382                                 }
4383                         }
4384                 }
4385                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4386                 return 1;
4387         }
4388
4389         virtual int OnStats(char statschar, userrec* user, string_list &results)
4390         {
4391                 if (statschar == 'c')
4392                 {
4393                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
4394                         {
4395                                 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');
4396                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
4397                         }
4398                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4399                         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);
4400                         return 1;
4401                 }
4402                 return 0;
4403         }
4404
4405         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4406         {
4407                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4408                 if (!validated)
4409                         return 0;
4410
4411                 if (command == "CONNECT")
4412                 {
4413                         return this->HandleConnect(parameters,pcnt,user);
4414                 }
4415                 else if (command == "STATS")
4416                 {
4417                         return this->HandleStats(parameters,pcnt,user);
4418                 }
4419                 else if (command == "MOTD")
4420                 {
4421                         return this->HandleMotd(parameters,pcnt,user);
4422                 }
4423                 else if (command == "ADMIN")
4424                 {
4425                         return this->HandleAdmin(parameters,pcnt,user);
4426                 }
4427                 else if (command == "SQUIT")
4428                 {
4429                         return this->HandleSquit(parameters,pcnt,user);
4430                 }
4431                 else if (command == "MAP")
4432                 {
4433                         this->HandleMap(parameters,pcnt,user);
4434                         return 1;
4435                 }
4436                 else if ((command == "TIME") && (pcnt > 0))
4437                 {
4438                         return this->HandleTime(parameters,pcnt,user);
4439                 }
4440                 else if (command == "LUSERS")
4441                 {
4442                         this->HandleLusers(parameters,pcnt,user);
4443                         return 1;
4444                 }
4445                 else if (command == "LINKS")
4446                 {
4447                         this->HandleLinks(parameters,pcnt,user);
4448                         return 1;
4449                 }
4450                 else if (command == "WHOIS")
4451                 {
4452                         if (pcnt > 1)
4453                         {
4454                                 // remote whois
4455                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4456                         }
4457                 }
4458                 else if ((command == "VERSION") && (pcnt > 0))
4459                 {
4460                         this->HandleVersion(parameters,pcnt,user);
4461                         return 1;
4462                 }
4463
4464                 return 0;
4465         }
4466
4467         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4468         {
4469                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4470                 {
4471                         // this bit of code cleverly routes all module commands
4472                         // to all remote severs *automatically* so that modules
4473                         // can just handle commands locally, without having
4474                         // to have any special provision in place for remote
4475                         // commands and linking protocols.
4476                         std::deque<std::string> params;
4477                         params.clear();
4478                         for (int j = 0; j < pcnt; j++)
4479                         {
4480                                 if (strchr(parameters[j],' '))
4481                                 {
4482                                         params.push_back(":" + std::string(parameters[j]));
4483                                 }
4484                                 else
4485                                 {
4486                                         params.push_back(std::string(parameters[j]));
4487                                 }
4488                         }
4489                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4490                         DoOneToMany(user->nick,command,params);
4491                 }
4492         }
4493
4494         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4495         {
4496                 TreeServer* s = FindServer(servername);
4497                 if (s)
4498                 {
4499                         description = s->GetDesc();
4500                 }
4501         }
4502
4503         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4504         {
4505                 if (IS_LOCAL(source))
4506                 {
4507                         std::deque<std::string> params;
4508                         params.push_back(dest->nick);
4509                         params.push_back(channel->name);
4510                         DoOneToMany(source->nick,"INVITE",params);
4511                 }
4512         }
4513
4514         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4515         {
4516                 std::deque<std::string> params;
4517                 params.push_back(chan->name);
4518                 params.push_back(":"+topic);
4519                 DoOneToMany(user->nick,"TOPIC",params);
4520         }
4521
4522         virtual void OnWallops(userrec* user, const std::string &text)
4523         {
4524                 if (IS_LOCAL(user))
4525                 {
4526                         std::deque<std::string> params;
4527                         params.push_back(":"+text);
4528                         DoOneToMany(user->nick,"WALLOPS",params);
4529                 }
4530         }
4531
4532         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4533         {
4534                 if (target_type == TYPE_USER)
4535                 {
4536                         userrec* d = (userrec*)dest;
4537                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4538                         {
4539                                 std::deque<std::string> params;
4540                                 params.clear();
4541                                 params.push_back(d->nick);
4542                                 params.push_back(":"+text);
4543                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4544                         }
4545                 }
4546                 else if (target_type == TYPE_CHANNEL)
4547                 {
4548                         if (IS_LOCAL(user))
4549                         {
4550                                 chanrec *c = (chanrec*)dest;
4551                                 if (c)
4552                                 {
4553                                         std::string cname = c->name;
4554                                         if (status)
4555                                                 cname = status + cname;
4556                                         std::deque<TreeServer*> list;
4557                                         GetListOfServersForChannel(c,list);
4558                                         unsigned int ucount = list.size();
4559                                         for (unsigned int i = 0; i < ucount; i++)
4560                                         {
4561                                                 TreeSocket* Sock = list[i]->GetSocket();
4562                                                 if (Sock)
4563                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4564                                         }
4565                                 }
4566                         }
4567                 }
4568                 else if (target_type == TYPE_SERVER)
4569                 {
4570                         if (IS_LOCAL(user))
4571                         {
4572                                 char* target = (char*)dest;
4573                                 std::deque<std::string> par;
4574                                 par.push_back(target);
4575                                 par.push_back(":"+text);
4576                                 DoOneToMany(user->nick,"NOTICE",par);
4577                         }
4578                 }
4579         }
4580
4581         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4582         {
4583                 if (target_type == TYPE_USER)
4584                 {
4585                         // route private messages which are targetted at clients only to the server
4586                         // which needs to receive them
4587                         userrec* d = (userrec*)dest;
4588                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4589                         {
4590                                 std::deque<std::string> params;
4591                                 params.clear();
4592                                 params.push_back(d->nick);
4593                                 params.push_back(":"+text);
4594                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4595                         }
4596                 }
4597                 else if (target_type == TYPE_CHANNEL)
4598                 {
4599                         if (IS_LOCAL(user))
4600                         {
4601                                 chanrec *c = (chanrec*)dest;
4602                                 if (c)
4603                                 {
4604                                         std::string cname = c->name;
4605                                         if (status)
4606                                                 cname = status + cname;
4607                                         std::deque<TreeServer*> list;
4608                                         GetListOfServersForChannel(c,list);
4609                                         unsigned int ucount = list.size();
4610                                         for (unsigned int i = 0; i < ucount; i++)
4611                                         {
4612                                                 TreeSocket* Sock = list[i]->GetSocket();
4613                                                 if (Sock)
4614                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4615                                         }
4616                                 }
4617                         }
4618                 }
4619                 else if (target_type == TYPE_SERVER)
4620                 {
4621                         if (IS_LOCAL(user))
4622                         {
4623                                 char* target = (char*)dest;
4624                                 std::deque<std::string> par;
4625                                 par.push_back(target);
4626                                 par.push_back(":"+text);
4627                                 DoOneToMany(user->nick,"PRIVMSG",par);
4628                         }
4629                 }
4630         }
4631
4632         virtual void OnBackgroundTimer(time_t curtime)
4633         {
4634                 AutoConnectServers(curtime);
4635                 DoPingChecks(curtime);
4636         }
4637
4638         virtual void OnUserJoin(userrec* user, chanrec* channel)
4639         {
4640                 // Only do this for local users
4641                 if (IS_LOCAL(user))
4642                 {
4643                         std::deque<std::string> params;
4644                         params.clear();
4645                         params.push_back(channel->name);
4646                         // set up their permissions and the channel TS with FJOIN.
4647                         // All users are FJOINed now, because a module may specify
4648                         // new joining permissions for the user.
4649                         params.clear();
4650                         params.push_back(channel->name);
4651                         params.push_back(ConvToStr(channel->age));
4652                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4653                         DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4654                 }
4655         }
4656
4657         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4658         {
4659                 // only occurs for local clients
4660                 if (user->registered != REG_ALL)
4661                         return;
4662                 std::deque<std::string> params;
4663                 params.push_back(newhost);
4664                 DoOneToMany(user->nick,"FHOST",params);
4665         }
4666
4667         virtual void OnChangeName(userrec* user, const std::string &gecos)
4668         {
4669                 // only occurs for local clients
4670                 if (user->registered != REG_ALL)
4671                         return;
4672                 std::deque<std::string> params;
4673                 params.push_back(gecos);
4674                 DoOneToMany(user->nick,"FNAME",params);
4675         }
4676
4677         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4678         {
4679                 if (IS_LOCAL(user))
4680                 {
4681                         std::deque<std::string> params;
4682                         params.push_back(channel->name);
4683                         if (partmessage != "")
4684                                 params.push_back(":"+partmessage);
4685                         DoOneToMany(user->nick,"PART",params);
4686                 }
4687         }
4688
4689         virtual void OnUserConnect(userrec* user)
4690         {
4691                 char agestr[MAXBUF];
4692                 if (IS_LOCAL(user))
4693                 {
4694                         std::deque<std::string> params;
4695                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4696                         params.push_back(agestr);
4697                         params.push_back(user->nick);
4698                         params.push_back(user->host);
4699                         params.push_back(user->dhost);
4700                         params.push_back(user->ident);
4701                         params.push_back("+"+std::string(user->FormatModes()));
4702                         params.push_back(user->GetIPString());
4703                         params.push_back(":"+std::string(user->fullname));
4704                         DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4705
4706                         // User is Local, change needs to be reflected!
4707                         TreeServer* SourceServer = FindServer(user->server);
4708                         if (SourceServer)
4709                         {
4710                                 SourceServer->AddUserCount();
4711                         }
4712
4713                 }
4714         }
4715
4716         virtual void OnUserQuit(userrec* user, const std::string &reason)
4717         {
4718                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4719                 {
4720                         std::deque<std::string> params;
4721                         params.push_back(":"+reason);
4722                         DoOneToMany(user->nick,"QUIT",params);
4723                 }
4724                 // Regardless, We need to modify the user Counts..
4725                 TreeServer* SourceServer = FindServer(user->server);
4726                 if (SourceServer)
4727                 {
4728                         SourceServer->DelUserCount();
4729                 }
4730
4731         }
4732
4733         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4734         {
4735                 if (IS_LOCAL(user))
4736                 {
4737                         std::deque<std::string> params;
4738                         params.push_back(user->nick);
4739                         DoOneToMany(oldnick,"NICK",params);
4740                 }
4741         }
4742
4743         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4744         {
4745                 if ((source) && (IS_LOCAL(source)))
4746                 {
4747                         std::deque<std::string> params;
4748                         params.push_back(chan->name);
4749                         params.push_back(user->nick);
4750                         params.push_back(":"+reason);
4751                         DoOneToMany(source->nick,"KICK",params);
4752                 }
4753                 else if (!source)
4754                 {
4755                         std::deque<std::string> params;
4756                         params.push_back(chan->name);
4757                         params.push_back(user->nick);
4758                         params.push_back(":"+reason);
4759                         DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4760                 }
4761         }
4762
4763         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4764         {
4765                 std::deque<std::string> params;
4766                 params.push_back(dest->nick);
4767                 params.push_back(":"+reason);
4768                 DoOneToMany(source->nick,"KILL",params);
4769         }
4770
4771         virtual void OnRehash(const std::string &parameter)
4772         {
4773                 if (parameter != "")
4774                 {
4775                         std::deque<std::string> params;
4776                         params.push_back(parameter);
4777                         DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4778                         // check for self
4779                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4780                         {
4781                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4782                                 ServerInstance->RehashServer();
4783                         }
4784                 }
4785                 ReadConfiguration(false);
4786         }
4787
4788         // note: the protocol does not allow direct umode +o except
4789         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4790         // locally.
4791         virtual void OnOper(userrec* user, const std::string &opertype)
4792         {
4793                 if (IS_LOCAL(user))
4794                 {
4795                         std::deque<std::string> params;
4796                         params.push_back(opertype);
4797                         DoOneToMany(user->nick,"OPERTYPE",params);
4798                 }
4799         }
4800
4801         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4802         {
4803                 if (IS_LOCAL(source))
4804                 {
4805                         char type[8];
4806                         snprintf(type,8,"%cLINE",linetype);
4807                         std::string stype = type;
4808                         if (adding)
4809                         {
4810                                 char sduration[MAXBUF];
4811                                 snprintf(sduration,MAXBUF,"%ld",duration);
4812                                 std::deque<std::string> params;
4813                                 params.push_back(host);
4814                                 params.push_back(sduration);
4815                                 params.push_back(":"+reason);
4816                                 DoOneToMany(source->nick,stype,params);
4817                         }
4818                         else
4819                         {
4820                                 std::deque<std::string> params;
4821                                 params.push_back(host);
4822                                 DoOneToMany(source->nick,stype,params);
4823                         }
4824                 }
4825         }
4826
4827         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4828         {
4829                 OnLine(source,hostmask,true,'G',duration,reason);
4830         }
4831
4832         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4833         {
4834                 OnLine(source,ipmask,true,'Z',duration,reason);
4835         }
4836
4837         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4838         {
4839                 OnLine(source,nickmask,true,'Q',duration,reason);
4840         }
4841
4842         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4843         {
4844                 OnLine(source,hostmask,true,'E',duration,reason);
4845         }
4846
4847         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4848         {
4849                 OnLine(source,hostmask,false,'G',0,"");
4850         }
4851
4852         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4853         {
4854                 OnLine(source,ipmask,false,'Z',0,"");
4855         }
4856
4857         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4858         {
4859                 OnLine(source,nickmask,false,'Q',0,"");
4860         }
4861
4862         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4863         {
4864                 OnLine(source,hostmask,false,'E',0,"");
4865         }
4866
4867         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4868         {
4869                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4870                 {
4871                         if (target_type == TYPE_USER)
4872                         {
4873                                 userrec* u = (userrec*)dest;
4874                                 std::deque<std::string> params;
4875                                 params.push_back(u->nick);
4876                                 params.push_back(text);
4877                                 DoOneToMany(user->nick,"MODE",params);
4878                         }
4879                         else
4880                         {
4881                                 chanrec* c = (chanrec*)dest;
4882                                 std::deque<std::string> params;
4883                                 params.push_back(c->name);
4884                                 params.push_back(text);
4885                                 DoOneToMany(user->nick,"MODE",params);
4886                         }
4887                 }
4888         }
4889
4890         virtual void OnSetAway(userrec* user)
4891         {
4892                 if (IS_LOCAL(user))
4893                 {
4894                         std::deque<std::string> params;
4895                         params.push_back(":"+std::string(user->awaymsg));
4896                         DoOneToMany(user->nick,"AWAY",params);
4897                 }
4898         }
4899
4900         virtual void OnCancelAway(userrec* user)
4901         {
4902                 if (IS_LOCAL(user))
4903                 {
4904                         std::deque<std::string> params;
4905                         params.clear();
4906                         DoOneToMany(user->nick,"AWAY",params);
4907                 }
4908         }
4909
4910         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4911         {
4912                 TreeSocket* s = (TreeSocket*)opaque;
4913                 if (target)
4914                 {
4915                         if (target_type == TYPE_USER)
4916                         {
4917                                 userrec* u = (userrec*)target;
4918                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4919                         }
4920                         else
4921                         {
4922                                 chanrec* c = (chanrec*)target;
4923                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4924                         }
4925                 }
4926         }
4927
4928         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4929         {
4930                 TreeSocket* s = (TreeSocket*)opaque;
4931                 if (target)
4932                 {
4933                         if (target_type == TYPE_USER)
4934                         {
4935                                 userrec* u = (userrec*)target;
4936                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4937                         }
4938                         else if (target_type == TYPE_OTHER)
4939                         {
4940                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4941                         }
4942                         else if (target_type == TYPE_CHANNEL)
4943                         {
4944                                 chanrec* c = (chanrec*)target;
4945                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4946                         }
4947                 }
4948         }
4949
4950         virtual void OnEvent(Event* event)
4951         {
4952                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4953
4954                 if (event->GetEventID() == "send_metadata")
4955                 {
4956                         if (params->size() < 3)
4957                                 return;
4958                         (*params)[2] = ":" + (*params)[2];
4959                         DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4960                 }
4961                 else if (event->GetEventID() == "send_topic")
4962                 {
4963                         if (params->size() < 2)
4964                                 return;
4965                         (*params)[1] = ":" + (*params)[1];
4966                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
4967                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time()));
4968                         DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
4969                 }
4970                 else if (event->GetEventID() == "send_mode")
4971                 {
4972                         if (params->size() < 2)
4973                                 return;
4974                         // Insert the TS value of the object, either userrec or chanrec
4975                         time_t ourTS = 0;
4976                         userrec* a = ServerInstance->FindNick((*params)[0]);
4977                         if (a)
4978                         {
4979                                 ourTS = a->age;
4980                         }
4981                         else
4982                         {
4983                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4984                                 if (a)
4985                                 {
4986                                         ourTS = a->age;
4987                                 }
4988                         }
4989                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4990                         DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4991                 }
4992         }
4993
4994         virtual ~ModuleSpanningTree()
4995         {
4996                 ServerInstance->Log(DEBUG,"Performing unload of spanningtree!");
4997                 ServerInstance->Log(DEBUG,"Freeing %d bindings...",Bindings.size());
4998                 for (unsigned int i = 0; i < Bindings.size(); i++)
4999                 {
5000                         ServerInstance->Log(DEBUG,"Freeing binding %d of %d",i, Bindings.size());
5001                         ServerInstance->SE->DelFd(Bindings[i]);
5002                         Bindings[i]->Close();
5003                         DELETE(Bindings[i]);
5004                 }
5005                 ServerInstance->Log(DEBUG,"Freeing connected servers...");
5006                 while (TreeRoot->ChildCount())
5007                 {
5008                         TreeServer* child_server = TreeRoot->GetChild(0);
5009                         ServerInstance->Log(DEBUG,"Freeing connected server %s", child_server->GetName().c_str());
5010                         if (child_server)
5011                         {
5012                                 TreeSocket* sock = child_server->GetSocket();
5013                                 ServerInstance->SE->DelFd(sock);
5014                                 sock->Close();
5015                                 DELETE(sock);
5016                         }
5017                 }
5018         }
5019
5020         virtual Version GetVersion()
5021         {
5022                 return Version(1,1,0,2,VF_VENDOR,API_VERSION);
5023         }
5024
5025         void Implements(char* List)
5026         {
5027                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
5028                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
5029                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
5030                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
5031                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
5032                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
5033                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
5034         }
5035
5036         /* It is IMPORTANT that m_spanningtree is the last module in the chain
5037          * so that any activity it sees is FINAL, e.g. we arent going to send out
5038          * a NICK message before m_cloaking has finished putting the +x on the user,
5039          * etc etc.
5040          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
5041          * the module call queue.
5042          */
5043         Priority Prioritize()
5044         {
5045                 return PRIORITY_LAST;
5046         }
5047 };
5048
5049 void DoFailOver(Link* x)
5050 {
5051         TreeProtocolModule->DoFailOver(x);
5052 }
5053
5054 Link* FindLink(const std::string& name)
5055 {
5056         return TreeProtocolModule->FindLink(name);
5057 }
5058
5059 class ModuleSpanningTreeFactory : public ModuleFactory
5060 {
5061  public:
5062         ModuleSpanningTreeFactory()
5063         {
5064         }
5065
5066         ~ModuleSpanningTreeFactory()
5067         {
5068         }
5069
5070         virtual Module * CreateModule(InspIRCd* Me)
5071         {
5072                 TreeProtocolModule = new ModuleSpanningTree(Me);
5073                 return TreeProtocolModule;
5074         }
5075
5076 };
5077
5078
5079 extern "C" void * init_module( void )
5080 {
5081         return new ModuleSpanningTreeFactory;
5082 }