src/modules/m_spanningtree.cpp

   1 /*   +------------------------------------+
   2  *   | Inspire Internet Relay Chat Daemon |
   3  *   +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                     E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* $ModDesc: Povides a spanning tree server link protocol */
  18
  19 using namespace std;
  20
  21 #include "configreader.h"
  22 #include "users.h"
  23 #include "channels.h"
  24 #include "modules.h"
  25 #include "commands/cmd_whois.h"
  26 #include "commands/cmd_stats.h"
  27 #include "socket.h"
  28 #include "inspircd.h"
  29 #include "wildcard.h"
  30 #include "xline.h"
  31 #include "cull_list.h"
  32 #include "aes.h"
  33
  34 #define nspace __gnu_cxx
  35
  36
  37 /** If you make a change which breaks the protocol, increment this.
  38  * If you  completely change the protocol, completely change the number.
  39  */
  40 const long ProtocolVersion = 1101;
  41
  42 /*
  43  * The server list in InspIRCd is maintained as two structures
  44  * which hold the data in different ways. Most of the time, we
  45  * want to very quicky obtain three pieces of information:
  46  *
  47  * (1) The information on a server
  48  * (2) The information on the server we must send data through
  49  *     to actually REACH the server we're after
  50  * (3) Potentially, the child/parent objects of this server
  51  *
  52  * The InspIRCd spanning protocol provides easy access to these
  53  * by storing the data firstly in a recursive structure, where
  54  * each item references its parent item, and a dynamic list
  55  * of child items, and another structure which stores the items
  56  * hashed, linearly. This means that if we want to find a server
  57  * by name quickly, we can look it up in the hash, avoiding
  58  * any O(n) lookups. If however, during a split or sync, we want
  59  * to apply an operation to a server, and any of its child objects
  60  * we can resort to recursion to walk the tree structure.
  61  */
  62
  63 using irc::sockets::MatchCIDR;
  64
  65 class ModuleSpanningTree;
  66 static ModuleSpanningTree* TreeProtocolModule;
  67 static InspIRCd* ServerInstance;
  68
  69 /** Any socket can have one of five states at any one time.
  70  * The LISTENER state indicates a socket which is listening
  71  * for connections. It cannot receive data itself, only incoming
  72  * sockets.
  73  * The CONNECTING state indicates an outbound socket which is
  74  * waiting to be writeable.
  75  * The WAIT_AUTH_1 state indicates the socket is outbound and
  76  * has successfully connected, but has not yet sent and received
  77  * SERVER strings.
  78  * The WAIT_AUTH_2 state indicates that the socket is inbound
  79  * (allocated by a LISTENER) but has not yet sent and received
  80  * SERVER strings.
  81  * The CONNECTED state represents a fully authorized, fully
  82  * connected server.
  83  */
  84 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  85
  86 /* Foward declarations */
  87 class TreeServer;
  88 class TreeSocket;
  89
  90 /* This variable represents the root of the server tree
  91  * (for all intents and purposes, it's us)
  92  */
  93 TreeServer *TreeRoot;
  94
  95 /* This hash_map holds the hash equivalent of the server
  96  * tree, used for rapid linear lookups.
  97  */
  98 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
  99 server_hash serverlist;
 100
 101 typedef nspace::hash_map<std::string, userrec*> uid_hash;
 102 typedef nspace::hash_map<std::string, char*> sid_hash;
 103
 104 /* More forward declarations */
 105 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 106 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 107 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 108 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 109 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 110 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 111 void ReadConfiguration(bool rebind);
 112
 113 /* Flatten links and /MAP for non-opers */
 114 bool FlatLinks;
 115 /* Hide U-Lined servers in /MAP and /LINKS */
 116 bool HideULines;
 117
 118 std::vector<std::string> ValidIPs;
 119
 120 class UserManager : public classbase
 121 {
 122         uid_hash uids;
 123         sid_hash sids;
 124  public:
 125         UserManager()
 126         {
 127                 uids.clear();
 128                 sids.clear();
 129         }
 130
 131         std::string UserToUID(userrec* user)
 132         {
 133                 return "";
 134         }
 135
 136         std::string UIDToUser(const std::string &UID)
 137         {
 138                 return "";
 139         }
 140
 141         std::string CreateAndAdd(userrec* user)
 142         {
 143                 return "";
 144         }
 145
 146         std::string CreateAndAdd(const std::string &servername)
 147         {
 148                 return "";
 149         }
 150
 151         std::string ServerToSID(const std::string &servername)
 152         {
 153                 return "";
 154         }
 155
 156         std::string SIDToServer(const std::string &SID)
 157         {
 158                 return "";
 159         }
 160
 161         userrec* FindByID(const std::string &UID)
 162         {
 163                 return NULL;
 164         }
 165 };
 166
 167
 168 /** Each server in the tree is represented by one class of
 169  * type TreeServer. A locally connected TreeServer can
 170  * have a class of type TreeSocket associated with it, for
 171  * remote servers, the TreeSocket entry will be NULL.
 172  * Each server also maintains a pointer to its parent
 173  * (NULL if this server is ours, at the top of the tree)
 174  * and a pointer to its "Route" (see the comments in the
 175  * constructors below), and also a dynamic list of pointers
 176  * to its children which can be iterated recursively
 177  * if required. Creating or deleting objects of type
 178  i* TreeServer automatically maintains the hash_map of
 179  * TreeServer items, deleting and inserting them as they
 180  * are created and destroyed.
 181  */
 182 class TreeServer : public classbase
 183 {
 184         InspIRCd* ServerInstance;               /* Creator */
 185         TreeServer* Parent;                     /* Parent entry */
 186         TreeServer* Route;                      /* Route entry */
 187         std::vector<TreeServer*> Children;      /* List of child objects */
 188         irc::string ServerName;                 /* Server's name */
 189         std::string ServerDesc;                 /* Server's description */
 190         std::string VersionString;              /* Version string or empty string */
 191         int UserCount;                          /* Not used in this version */
 192         int OperCount;                          /* Not used in this version */
 193         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 194         time_t NextPing;                        /* After this time, the server should be PINGed*/
 195         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 196
 197  public:
 198
 199         /** We don't use this constructor. Its a dummy, and won't cause any insertion
 200          * of the TreeServer into the hash_map. See below for the two we DO use.
 201          */
 202         TreeServer(InspIRCd* Instance) : ServerInstance(Instance)
 203         {
 204                 Parent = NULL;
 205                 ServerName = "";
 206                 ServerDesc = "";
 207                 VersionString = "";
 208                 UserCount = OperCount = 0;
 209                 VersionString = ServerInstance->GetVersionString();
 210         }
 211
 212         /** We use this constructor only to create the 'root' item, TreeRoot, which
 213          * represents our own server. Therefore, it has no route, no parent, and
 214          * no socket associated with it. Its version string is our own local version.
 215          */
 216         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc)
 217         {
 218                 Parent = NULL;
 219                 VersionString = "";
 220                 UserCount = OperCount = 0;
 221                 VersionString = ServerInstance->GetVersionString();
 222                 Route = NULL;
 223                 Socket = NULL; /* Fix by brain */
 224                 AddHashEntry();
 225         }
 226
 227         /** When we create a new server, we call this constructor to initialize it.
 228          * This constructor initializes the server's Route and Parent, and sets up
 229          * its ping counters so that it will be pinged one minute from now.
 230          */
 231         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 232                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 233         {
 234                 VersionString = "";
 235                 UserCount = OperCount = 0;
 236                 this->SetNextPingTime(time(NULL) + 60);
 237                 this->SetPingFlag();
 238
 239                 /* find the 'route' for this server (e.g. the one directly connected
 240                  * to the local server, which we can use to reach it)
 241                  *
 242                  * In the following example, consider we have just added a TreeServer
 243                  * class for server G on our network, of which we are server A.
 244                  * To route traffic to G (marked with a *) we must send the data to
 245                  * B (marked with a +) so this algorithm initializes the 'Route'
 246                  * value to point at whichever server traffic must be routed through
 247                  * to get here. If we were to try this algorithm with server B,
 248                  * the Route pointer would point at its own object ('this').
 249                  *
 250                  *              A
 251                  *             / \
 252                  *          + B   C
 253                  *           / \   \
 254                  *          D   E   F
 255                  *         /         \
 256                  *      * G           H
 257                  *
 258                  * We only run this algorithm when a server is created, as
 259                  * the routes remain constant while ever the server exists, and
 260                  * do not need to be re-calculated.
 261                  */
 262
 263                 Route = Above;
 264                 if (Route == TreeRoot)
 265                 {
 266                         Route = this;
 267                 }
 268                 else
 269                 {
 270                         while (this->Route->GetParent() != TreeRoot)
 271                         {
 272                                 this->Route = Route->GetParent();
 273                         }
 274                 }
 275
 276                 /* Because recursive code is slow and takes a lot of resources,
 277                  * we store two representations of the server tree. The first
 278                  * is a recursive structure where each server references its
 279                  * children and its parent, which is used for netbursts and
 280                  * netsplits to dump the whole dataset to the other server,
 281                  * and the second is used for very fast lookups when routing
 282                  * messages and is instead a hash_map, where each item can
 283                  * be referenced by its server name. The AddHashEntry()
 284                  * call below automatically inserts each TreeServer class
 285                  * into the hash_map as it is created. There is a similar
 286                  * maintainance call in the destructor to tidy up deleted
 287                  * servers.
 288                  */
 289
 290                 this->AddHashEntry();
 291         }
 292
 293         int QuitUsers(const std::string &reason)
 294         {
 295                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 296                 const char* reason_s = reason.c_str();
 297                 std::vector<userrec*> time_to_die;
 298                 for (user_hash::iterator n = ServerInstance->clientlist.begin(); n != ServerInstance->clientlist.end(); n++)
 299                 {
 300                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 301                         {
 302                                 time_to_die.push_back(n->second);
 303                         }
 304                 }
 305                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 306                 {
 307                         userrec* a = (userrec*)*n;
 308                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 309                         if (!IS_LOCAL(a))
 310                                 userrec::QuitUser(ServerInstance,a,reason_s);
 311                 }
 312                 return time_to_die.size();
 313         }
 314
 315         /** This method is used to add the structure to the
 316          * hash_map for linear searches. It is only called
 317          * by the constructors.
 318          */
 319         void AddHashEntry()
 320         {
 321                 server_hash::iterator iter;
 322                 iter = serverlist.find(this->ServerName.c_str());
 323                 if (iter == serverlist.end())
 324                         serverlist[this->ServerName.c_str()] = this;
 325         }
 326
 327         /** This method removes the reference to this object
 328          * from the hash_map which is used for linear searches.
 329          * It is only called by the default destructor.
 330          */
 331         void DelHashEntry()
 332         {
 333                 server_hash::iterator iter;
 334                 iter = serverlist.find(this->ServerName.c_str());
 335                 if (iter != serverlist.end())
 336                         serverlist.erase(iter);
 337         }
 338
 339         /** These accessors etc should be pretty self-
 340          * explanitory.
 341          */
 342         TreeServer* GetRoute()
 343         {
 344                 return Route;
 345         }
 346
 347         std::string GetName()
 348         {
 349                 return ServerName.c_str();
 350         }
 351
 352         std::string GetDesc()
 353         {
 354                 return ServerDesc;
 355         }
 356
 357         std::string GetVersion()
 358         {
 359                 return VersionString;
 360         }
 361
 362         void SetNextPingTime(time_t t)
 363         {
 364                 this->NextPing = t;
 365                 LastPingWasGood = false;
 366         }
 367
 368         time_t NextPingTime()
 369         {
 370                 return NextPing;
 371         }
 372
 373         bool AnsweredLastPing()
 374         {
 375                 return LastPingWasGood;
 376         }
 377
 378         void SetPingFlag()
 379         {
 380                 LastPingWasGood = true;
 381         }
 382
 383         int GetUserCount()
 384         {
 385                 return UserCount;
 386         }
 387
 388         void AddUserCount()
 389         {
 390                 UserCount++;
 391         }
 392
 393         void DelUserCount()
 394         {
 395                 UserCount--;
 396         }
 397
 398         int GetOperCount()
 399         {
 400                 return OperCount;
 401         }
 402
 403         TreeSocket* GetSocket()
 404         {
 405                 return Socket;
 406         }
 407
 408         TreeServer* GetParent()
 409         {
 410                 return Parent;
 411         }
 412
 413         void SetVersion(std::string Version)
 414         {
 415                 VersionString = Version;
 416         }
 417
 418         unsigned int ChildCount()
 419         {
 420                 return Children.size();
 421         }
 422
 423         TreeServer* GetChild(unsigned int n)
 424         {
 425                 if (n < Children.size())
 426                 {
 427                         /* Make sure they  cant request
 428                          * an out-of-range object. After
 429                          * all we know what these programmer
 430                          * types are like *grin*.
 431                          */
 432                         return Children[n];
 433                 }
 434                 else
 435                 {
 436                         return NULL;
 437                 }
 438         }
 439
 440         void AddChild(TreeServer* Child)
 441         {
 442                 Children.push_back(Child);
 443         }
 444
 445         bool DelChild(TreeServer* Child)
 446         {
 447                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 448                 {
 449                         if (*a == Child)
 450                         {
 451                                 Children.erase(a);
 452                                 return true;
 453                         }
 454                 }
 455                 return false;
 456         }
 457
 458         /** Removes child nodes of this node, and of that node, etc etc.
 459          * This is used during netsplits to automatically tidy up the
 460          * server tree. It is slow, we don't use it for much else.
 461          */
 462         bool Tidy()
 463         {
 464                 bool stillchildren = true;
 465                 while (stillchildren)
 466                 {
 467                         stillchildren = false;
 468                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 469                         {
 470                                 TreeServer* s = (TreeServer*)*a;
 471                                 s->Tidy();
 472                                 Children.erase(a);
 473                                 DELETE(s);
 474                                 stillchildren = true;
 475                                 break;
 476                         }
 477                 }
 478                 return true;
 479         }
 480
 481         ~TreeServer()
 482         {
 483                 /* We'd better tidy up after ourselves, eh? */
 484                 this->DelHashEntry();
 485         }
 486 };
 487
 488 /** The Link class might as well be a struct,
 489  * but this is C++ and we don't believe in structs (!).
 490  * It holds the entire information of one <link>
 491  * tag from the main config file. We maintain a list
 492  * of them, and populate the list on rehash/load.
 493  */
 494 class Link : public classbase
 495 {
 496  public:
 497         irc::string Name;
 498         std::string IPAddr;
 499         int Port;
 500         std::string SendPass;
 501         std::string RecvPass;
 502         unsigned long AutoConnect;
 503         time_t NextConnectTime;
 504         std::string EncryptionKey;
 505         bool HiddenFromStats;
 506         irc::string FailOver;
 507 };
 508
 509 void DoFailOver(Link* x);
 510 Link* FindLink(const std::string& name);
 511
 512 /* The usual stuff for inspircd modules,
 513  * plus the vector of Link classes which we
 514  * use to store the <link> tags from the config
 515  * file.
 516  */
 517 ConfigReader *Conf;
 518 std::vector<Link> LinkBlocks;
 519
 520 /** Yay for fast searches!
 521  * This is hundreds of times faster than recursion
 522  * or even scanning a linked list, especially when
 523  * there are more than a few servers to deal with.
 524  * (read as: lots).
 525  */
 526 TreeServer* FindServer(std::string ServerName)
 527 {
 528         server_hash::iterator iter;
 529         iter = serverlist.find(ServerName.c_str());
 530         if (iter != serverlist.end())
 531         {
 532                 return iter->second;
 533         }
 534         else
 535         {
 536                 return NULL;
 537         }
 538 }
 539
 540 /** Returns the locally connected server we must route a
 541  * message through to reach server 'ServerName'. This
 542  * only applies to one-to-one and not one-to-many routing.
 543  * See the comments for the constructor of TreeServer
 544  * for more details.
 545  */
 546 TreeServer* BestRouteTo(std::string ServerName)
 547 {
 548         if (ServerName.c_str() == TreeRoot->GetName())
 549                 return NULL;
 550         TreeServer* Found = FindServer(ServerName);
 551         if (Found)
 552         {
 553                 return Found->GetRoute();
 554         }
 555         else
 556         {
 557                 return NULL;
 558         }
 559 }
 560
 561 /** Find the first server matching a given glob mask.
 562  * Theres no find-using-glob method of hash_map [awwww :-(]
 563  * so instead, we iterate over the list using an iterator
 564  * and match each one until we get a hit. Yes its slow,
 565  * deal with it.
 566  */
 567 TreeServer* FindServerMask(std::string ServerName)
 568 {
 569         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 570         {
 571                 if (match(i->first.c_str(),ServerName.c_str()))
 572                         return i->second;
 573         }
 574         return NULL;
 575 }
 576
 577 /* A convenient wrapper that returns true if a server exists */
 578 bool IsServer(std::string ServerName)
 579 {
 580         return (FindServer(ServerName) != NULL);
 581 }
 582
 583
 584 class cmd_rconnect : public command_t
 585 {
 586         Module* Creator;
 587  public:
 588         cmd_rconnect (InspIRCd* Instance, Module* Callback) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback)
 589         {
 590                 this->source = "m_spanningtree.so";
 591                 syntax = "<remote-server-mask> <servermask>";
 592         }
 593
 594         CmdResult Handle (const char** parameters, int pcnt, userrec *user)
 595         {
 596                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 597                 /* Is this aimed at our server? */
 598                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 599                 {
 600                         /* Yes, initiate the given connect */
 601                         ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 602                         const char* para[1];
 603                         para[0] = parameters[1];
 604                         std::string original_command = std::string("CONNECT ") + parameters[1];
 605                         Creator->OnPreCommand("CONNECT", para, 1, user, true, original_command);
 606
 607                         return CMD_SUCCESS;
 608                 }
 609
 610                 return CMD_FAILURE;
 611         }
 612 };
 613
 614
 615
 616 /** Every SERVER connection inbound or outbound is represented by
 617  * an object of type TreeSocket.
 618  * TreeSockets, being inherited from InspSocket, can be tied into
 619  * the core socket engine, and we cn therefore receive activity events
 620  * for them, just like activex objects on speed. (yes really, that
 621  * is a technical term!) Each of these which relates to a locally
 622  * connected server is assocated with it, by hooking it onto a
 623  * TreeSocket class using its constructor. In this way, we can
 624  * maintain a list of servers, some of which are directly connected,
 625  * some of which are not.
 626  */
 627 class TreeSocket : public InspSocket
 628 {
 629         std::string myhost;
 630         std::string in_buffer;
 631         ServerState LinkState;
 632         std::string InboundServerName;
 633         std::string InboundDescription;
 634         int num_lost_users;
 635         int num_lost_servers;
 636         time_t NextPing;
 637         bool LastPingWasGood;
 638         bool bursting;
 639         AES* ctx_in;
 640         AES* ctx_out;
 641         unsigned int keylength;
 642         std::string ModuleList;
 643         std::map<std::string,std::string> CapKeys;
 644
 645  public:
 646
 647         /** Because most of the I/O gubbins are encapsulated within
 648          * InspSocket, we just call the superclass constructor for
 649          * most of the action, and append a few of our own values
 650          * to it.
 651          */
 652         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime)
 653                 : InspSocket(SI, host, port, listening, maxtime)
 654         {
 655                 myhost = host;
 656                 this->LinkState = LISTENER;
 657                 this->ctx_in = NULL;
 658                 this->ctx_out = NULL;
 659         }
 660
 661         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 662                 : InspSocket(SI, host, port, listening, maxtime)
 663         {
 664                 myhost = ServerName;
 665                 this->LinkState = CONNECTING;
 666                 this->ctx_in = NULL;
 667                 this->ctx_out = NULL;
 668         }
 669
 670         /** When a listening socket gives us a new file descriptor,
 671          * we must associate it with a socket without creating a new
 672          * connection. This constructor is used for this purpose.
 673          */
 674         TreeSocket(InspIRCd* SI, int newfd, char* ip)
 675                 : InspSocket(SI, newfd, ip)
 676         {
 677                 this->LinkState = WAIT_AUTH_1;
 678                 this->ctx_in = NULL;
 679                 this->ctx_out = NULL;
 680                 this->SendCapabilities();
 681         }
 682
 683         ~TreeSocket()
 684         {
 685                 if (ctx_in)
 686                         DELETE(ctx_in);
 687                 if (ctx_out)
 688                         DELETE(ctx_out);
 689         }
 690
 691         void InitAES(std::string key,std::string SName)
 692         {
 693                 if (key == "")
 694                         return;
 695
 696                 ctx_in = new AES();
 697                 ctx_out = new AES();
 698                 Instance->Log(DEBUG,"Initialized AES key %s",key.c_str());
 699                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 700                 keylength = key.length();
 701                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 702                 {
 703                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 704                         Instance->Log(DEBUG,"Key length not 16, 24 or 32 characters!");
 705                 }
 706                 else
 707                 {
 708                         if (this->GetState() != I_ERROR)
 709                         {
 710                                 this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 711                                 ctx_in->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 712                                         \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 713                                 ctx_out->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 714                                         \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 715                         }
 716                 }
 717         }
 718
 719         /** When an outbound connection finishes connecting, we receive
 720          * this event, and must send our SERVER string to the other
 721          * side. If the other side is happy, as outlined in the server
 722          * to server docs on the inspircd.org site, the other side
 723          * will then send back its own server string.
 724          */
 725         virtual bool OnConnected()
 726         {
 727                 if (this->LinkState == CONNECTING)
 728                 {
 729                         /* we do not need to change state here. */
 730                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 731                         {
 732                                 if (x->Name == this->myhost)
 733                                 {
 734                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
 735                                         this->SendCapabilities();
 736                                         if (x->EncryptionKey != "")
 737                                         {
 738                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 739                                                 {
 740                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 741                                                 }
 742                                                 else
 743                                                 {
 744                                                         this->WriteLine(std::string("AES ")+this->Instance->Config->ServerName);
 745                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 746                                                 }
 747                                         }
 748                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 749                                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 750                                         return true;
 751                                 }
 752                         }
 753                 }
 754                 /* There is a (remote) chance that between the /CONNECT and the connection
 755                  * being accepted, some muppet has removed the <link> block and rehashed.
 756                  * If that happens the connection hangs here until it's closed. Unlikely
 757                  * and rather harmless.
 758                  */
 759                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 760                 return true;
 761         }
 762
 763         virtual void OnError(InspSocketError e)
 764         {
 765                 /* We don't handle this method, because all our
 766                  * dirty work is done in OnClose() (see below)
 767                  * which is still called on error conditions too.
 768                  */
 769                 if (e == I_ERR_CONNECT)
 770                 {
 771                         this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
 772                         Link* MyLink = FindLink(myhost);
 773                         if (MyLink)
 774                                 DoFailOver(MyLink);
 775                 }
 776         }
 777
 778         virtual int OnDisconnect()
 779         {
 780                 /* For the same reason as above, we don't
 781                  * handle OnDisconnect()
 782                  */
 783                 return true;
 784         }
 785
 786         /** Recursively send the server tree with distances as hops.
 787          * This is used during network burst to inform the other server
 788          * (and any of ITS servers too) of what servers we know about.
 789          * If at any point any of these servers already exist on the other
 790          * end, our connection may be terminated. The hopcounts given
 791          * by this function are relative, this doesn't matter so long as
 792          * they are all >1, as all the remote servers re-calculate them
 793          * to be relative too, with themselves as hop 0.
 794          */
 795         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 796         {
 797                 char command[1024];
 798                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 799                 {
 800                         TreeServer* recursive_server = Current->GetChild(q);
 801                         if (recursive_server != s)
 802                         {
 803                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 804                                 this->WriteLine(command);
 805                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 806                                 /* down to next level */
 807                                 this->SendServers(recursive_server, s, hops+1);
 808                         }
 809                 }
 810         }
 811
 812         std::string MyCapabilities()
 813         {
 814                 std::vector<std::string> modlist;
 815                 std::string capabilities = "";
 816
 817                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 818                 {
 819                         if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
 820                                 modlist.push_back(this->Instance->Config->module_names[i]);
 821                 }
 822                 sort(modlist.begin(),modlist.end());
 823                 for (unsigned int i = 0; i < modlist.size(); i++)
 824                 {
 825                         if (i)
 826                                 capabilities = capabilities + ",";
 827                         capabilities = capabilities + modlist[i];
 828                 }
 829                 return capabilities;
 830         }
 831
 832         void SendCapabilities()
 833         {
 834                 irc::commasepstream modulelist(MyCapabilities());
 835
 836                 this->WriteLine("CAPAB START");
 837
 838                 /* Send module names, split at 509 length */
 839                 std::string item = "*";
 840                 std::string line = "CAPAB MODULES ";
 841                 while ((item = modulelist.GetToken()) != "")
 842                 {
 843                         if (line.length() + item.length() + 1 > 509)
 844                         {
 845                                 this->WriteLine(line);
 846                                 line = "CAPAB MODULES ";
 847                         }
 848
 849                         if (line != "CAPAB MODULES ")
 850                                 line.append(",");
 851
 852                         line.append(item);
 853                 }
 854                 if (line != "CAPAB MODULES ")
 855                         this->WriteLine(line);
 856
 857                 int ip6 = 0;
 858                 int ip6support = 0;
 859 #ifdef IPV6
 860                 ip6 = 1;
 861 #endif
 862 #ifdef SUPPORT_IP6LINKS
 863                 ip6support = 1;
 864 #endif
 865                 this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support)+" PROTOCOL="+ConvToStr(ProtocolVersion));
 866
 867                 this->WriteLine("CAPAB END");
 868         }
 869
 870         /* Check a comma seperated list for an item */
 871         bool HasItem(const std::string &list, const std::string &item)
 872         {
 873                 irc::commasepstream seplist(list);
 874
 875                 std::string item2 = "*";
 876                 while ((item2 = seplist.GetToken()) != "")
 877                 {
 878                         if (item2 == item)
 879                                 return true;
 880                 }
 881
 882                 return false;
 883         }
 884
 885         /* Isolate and return the elements that are different between two comma seperated lists */
 886         std::string ListDifference(const std::string &one, const std::string &two)
 887         {
 888                 irc::commasepstream list_one(one);
 889                 std::string item = "*";
 890                 std::string result = "";
 891                 while ((item = list_one.GetToken()) != "")
 892                 {
 893                         if (!HasItem(two, item))
 894                         {
 895                                 result.append(" ");
 896                                 result.append(item);
 897                         }
 898                 }
 899                 return result;
 900         }
 901
 902         bool Capab(std::deque<std::string> params)
 903         {
 904                 if (params.size() < 1)
 905                 {
 906                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 907                         return false;
 908                 }
 909
 910                 if (params[0] == "START")
 911                 {
 912                         this->ModuleList = "";
 913                         this->CapKeys.clear();
 914                 }
 915                 else if (params[0] == "END")
 916                 {
 917                         std::string reason = "";
 918                         int ip6support = 0;
 919 #ifdef SUPPORT_IP6LINKS
 920                         ip6support = 1;
 921 #endif
 922                         /* Compare ModuleList and check CapKeys...
 923                          * Maybe this could be tidier? -- Brain
 924                          */
 925                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 926                         {
 927                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 928                                 if (!diff.length())
 929                                 {
 930                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 931                                 }
 932                                 else
 933                                 {
 934                                         diff = "this server:" + diff;
 935                                 }
 936                                 if (diff.length() == 12)
 937                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 938                                 else
 939                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 940                         }
 941
 942                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 943                                 reason = "We don't both support linking to IPV6 servers";
 944
 945                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 946                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 947
 948                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 949                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 950
 951                         if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
 952                         {
 953                                 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
 954                                 {
 955                                         reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
 956                                 }
 957                                 else
 958                                 {
 959                                         reason = "Protocol version not specified";
 960                                 }
 961                         }
 962
 963                         if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
 964                                 reason = "We don't both have halfop support enabled/disabled identically";
 965
 966                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 967                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 968
 969                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 970                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 971
 972                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 973                                 reason = "Maximum modes per line differ or remote modes per line not specified";
 974
 975                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 976                                 reason = "Maximum quit lengths differ or remote quit length not specified";
 977
 978                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 979                                 reason = "Maximum topic lengths differ or remote topic length not specified";
 980
 981                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
 982                                 reason = "Maximum kick lengths differ or remote kick length not specified";
 983
 984                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
 985                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
 986
 987                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
 988                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
 989
 990                         if (reason.length())
 991                         {
 992                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
 993                                 return false;
 994                         }
 995                 }
 996                 else if ((params[0] == "MODULES") && (params.size() == 2))
 997                 {
 998                         if (!this->ModuleList.length())
 999                         {
1000                                 this->ModuleList.append(params[1]);
1001                         }
1002                         else
1003                         {
1004                                 this->ModuleList.append(",");
1005                                 this->ModuleList.append(params[1]);
1006                         }
1007                 }
1008                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
1009                 {
1010                         irc::tokenstream capabs(params[1]);
1011                         std::string item = "*";
1012                         while ((item = capabs.GetToken()) != "")
1013                         {
1014                                 /* Process each key/value pair */
1015                                 std::string::size_type equals = item.rfind('=');
1016                                 if (equals != std::string::npos)
1017                                 {
1018                                         std::string var = item.substr(0, equals);
1019                                         std::string value = item.substr(equals+1, item.length());
1020                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1021                                         CapKeys[var] = value;
1022                                 }
1023                         }
1024                 }
1025
1026                 return true;
1027         }
1028
1029         /** This function forces this server to quit, removing this server
1030          * and any users on it (and servers and users below that, etc etc).
1031          * It's very slow and pretty clunky, but luckily unless your network
1032          * is having a REAL bad hair day, this function shouldnt be called
1033          * too many times a month ;-)
1034          */
1035         void SquitServer(std::string &from, TreeServer* Current)
1036         {
1037                 /* recursively squit the servers attached to 'Current'.
1038                  * We're going backwards so we don't remove users
1039                  * while we still need them ;)
1040                  */
1041                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1042                 {
1043                         TreeServer* recursive_server = Current->GetChild(q);
1044                         this->SquitServer(from,recursive_server);
1045                 }
1046                 /* Now we've whacked the kids, whack self */
1047                 num_lost_servers++;
1048                 num_lost_users += Current->QuitUsers(from);
1049         }
1050
1051         /** This is a wrapper function for SquitServer above, which
1052          * does some validation first and passes on the SQUIT to all
1053          * other remaining servers.
1054          */
1055         void Squit(TreeServer* Current,std::string reason)
1056         {
1057                 if ((Current) && (Current != TreeRoot))
1058                 {
1059                         std::deque<std::string> params;
1060                         params.push_back(Current->GetName());
1061                         params.push_back(":"+reason);
1062                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1063                         if (Current->GetParent() == TreeRoot)
1064                         {
1065                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1066                         }
1067                         else
1068                         {
1069                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1070                         }
1071                         num_lost_servers = 0;
1072                         num_lost_users = 0;
1073                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1074                         SquitServer(from, Current);
1075                         Current->Tidy();
1076                         Current->GetParent()->DelChild(Current);
1077                         DELETE(Current);
1078                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1079                 }
1080                 else
1081                 {
1082                         Instance->Log(DEFAULT,"Squit from unknown server");
1083                 }
1084         }
1085
1086         /** FMODE command - server mode with timestamp checks */
1087         bool ForceMode(std::string source, std::deque<std::string> &params)
1088         {
1089                 /* Chances are this is a 1.0 FMODE without TS */
1090                 if (params.size() < 3)
1091                 {
1092                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
1093                         return false;
1094                 }
1095
1096                 bool smode = false;
1097                 std::string sourceserv;
1098
1099                 /* Are we dealing with an FMODE from a user, or from a server? */
1100                 userrec* who = this->Instance->FindNick(source);
1101                 if (who)
1102                 {
1103                         /* FMODE from a user, set sourceserv to the users server name */
1104                         sourceserv = who->server;
1105                 }
1106                 else
1107                 {
1108                         /* FMODE from a server, create a fake user to receive mode feedback */
1109                         who = new userrec(this->Instance);
1110                         who->SetFd(FD_MAGIC_NUMBER);
1111                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1112                         sourceserv = source;    /* Set sourceserv to the actual source string */
1113                 }
1114                 const char* modelist[64];
1115                 time_t TS = 0;
1116                 int n = 0;
1117                 memset(&modelist,0,sizeof(modelist));
1118                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1119                 {
1120                         if (q == 1)
1121                         {
1122                                 /* The timestamp is in this position.
1123                                  * We don't want to pass that up to the
1124                                  * server->client protocol!
1125                                  */
1126                                 TS = atoi(params[q].c_str());
1127                         }
1128                         else
1129                         {
1130                                 /* Everything else is fine to append to the modelist */
1131                                 modelist[n++] = params[q].c_str();
1132                         }
1133
1134                 }
1135                 /* Extract the TS value of the object, either userrec or chanrec */
1136                 userrec* dst = this->Instance->FindNick(params[0]);
1137                 chanrec* chan = NULL;
1138                 time_t ourTS = 0;
1139                 if (dst)
1140                 {
1141                         ourTS = dst->age;
1142                 }
1143                 else
1144                 {
1145                         chan = this->Instance->FindChan(params[0]);
1146                         if (chan)
1147                         {
1148                                 ourTS = chan->age;
1149                         }
1150                         else
1151                                 /* Oops, channel doesnt exist! */
1152                                 return true;
1153                 }
1154
1155                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1156                  * with parameters.
1157                  */
1158                 if (TS == ourTS)
1159                 {
1160                         Instance->Log(DEBUG,"Entering TS equality check");
1161                         ModeHandler* mh = NULL;
1162                         unsigned long paramptr = 3;
1163                         std::string to_bounce = "";
1164                         std::string to_keep = "";
1165                         std::vector<std::string> params_to_keep;
1166                         std::string params_to_bounce = "";
1167                         bool adding = true;
1168                         char cur_change = 1;
1169                         char old_change = 0;
1170                         char old_bounce_change = 0;
1171                         /* Merge modes, basically do special stuff to mode with params */
1172                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1173                         {
1174                                 switch (*x)
1175                                 {
1176                                         case '-':
1177                                                 adding = false;
1178                                         break;
1179                                         case '+':
1180                                                 adding = true;
1181                                         break;
1182                                         default:
1183                                                 if (adding)
1184                                                 {
1185                                                         /* We only care about whats being set,
1186                                                          * not whats being unset
1187                                                          */
1188                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1189
1190                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1191                                                         {
1192                                                                 /* We only want to do special things to
1193                                                                  * modes with parameters, we are going to rewrite
1194                                                                  * those parameters
1195                                                                  */
1196                                                                 ModePair ret;
1197                                                                 adding ? cur_change = '+' : cur_change = '-';
1198
1199                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1200
1201                                                                 /* The mode is set here, check which we should keep */
1202                                                                 if (ret.first)
1203                                                                 {
1204                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1205
1206                                                                         if (which_to_keep == true)
1207                                                                         {
1208                                                                                 /* Keep ours, bounce theirs:
1209                                                                                  * Send back ours to them and
1210                                                                                  * drop their mode changs
1211                                                                                  */
1212                                                                                 adding ? cur_change = '+' : cur_change = '-';
1213                                                                                 if (cur_change != old_bounce_change)
1214                                                                                         to_bounce += cur_change;
1215                                                                                 to_bounce += *x;
1216                                                                                 old_bounce_change = cur_change;
1217
1218                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1219                                                                                         params_to_bounce.append(" ").append(ret.second);
1220                                                                         }
1221                                                                         else
1222                                                                         {
1223                                                                                 /* Keep theirs: Accept their mode change,
1224                                                                                  * do nothing else
1225                                                                                  */
1226                                                                                 adding ? cur_change = '+' : cur_change = '-';
1227                                                                                 if (cur_change != old_change)
1228                                                                                         to_keep += cur_change;
1229                                                                                 to_keep += *x;
1230                                                                                 old_change = cur_change;
1231
1232                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1233                                                                                         params_to_keep.push_back(params[paramptr]);
1234                                                                         }
1235                                                                 }
1236                                                                 else
1237                                                                 {
1238                                                                         /* Mode isnt set here, we want it */
1239                                                                         adding ? cur_change = '+' : cur_change = '-';
1240                                                                         if (cur_change != old_change)
1241                                                                                 to_keep += cur_change;
1242                                                                         to_keep += *x;
1243                                                                         old_change = cur_change;
1244
1245                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1246                                                                                 params_to_keep.push_back(params[paramptr]);
1247                                                                 }
1248
1249                                                                 paramptr++;
1250                                                         }
1251                                                         else
1252                                                         {
1253                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1254
1255                                                                 if (mh)
1256                                                                 {
1257                                                                         adding ? cur_change = '+' : cur_change = '-';
1258
1259                                                                         /* Just keep this, safe to merge with no checks
1260                                                                          * it has no parameters
1261                                                                          */
1262
1263                                                                         if (cur_change != old_change)
1264                                                                                 to_keep += cur_change;
1265                                                                         to_keep += *x;
1266                                                                         old_change = cur_change;
1267
1268                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1269                                                                         {
1270                                                                                 Instance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1271                                                                                 params_to_keep.push_back(params[paramptr++]);
1272                                                                         }
1273                                                                 }
1274                                                         }
1275                                                 }
1276                                                 else
1277                                                 {
1278                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1279
1280                                                         if (mh)
1281                                                         {
1282                                                                 /* Taking a mode away */
1283                                                                 adding ? cur_change = '+' : cur_change = '-';
1284
1285                                                                 if (cur_change != old_change)
1286                                                                         to_keep += cur_change;
1287                                                                 to_keep += *x;
1288                                                                 old_change = cur_change;
1289
1290                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1291                                                                         params_to_keep.push_back(params[paramptr++]);
1292                                                         }
1293                                                 }
1294                                         break;
1295                                 }
1296                         }
1297
1298                         if (to_bounce.length())
1299                         {
1300                                 std::deque<std::string> newparams;
1301                                 newparams.push_back(params[0]);
1302                                 newparams.push_back(ConvToStr(ourTS));
1303                                 newparams.push_back(to_bounce+params_to_bounce);
1304                                 Instance->Log(DEBUG,"BOUNCE BACK: %s",(to_bounce+params_to_bounce).c_str());
1305                                 DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1306                         }
1307
1308                         if (to_keep.length())
1309                         {
1310                                 unsigned int n = 2;
1311                                 unsigned int q = 0;
1312                                 modelist[0] = params[0].c_str();
1313                                 modelist[1] = to_keep.c_str();
1314
1315                                 if (params_to_keep.size() > 0)
1316                                 {
1317                                         for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
1318                                         {
1319                                                 Instance->Log(DEBUG,"KEEP Item %d of %d: %s", q, params_to_keep.size(), params_to_keep[q].c_str());
1320                                                 modelist[n++] = params_to_keep[q].c_str();
1321                                         }
1322                                 }
1323
1324                                 if (smode)
1325                                 {
1326                                         Instance->Log(DEBUG,"Send mode");
1327                                         this->Instance->SendMode(modelist, n, who);
1328                                 }
1329                                 else
1330                                 {
1331                                         Instance->Log(DEBUG,"Send mode client");
1332                                         this->Instance->CallCommandHandler("MODE", modelist, n, who);
1333                                 }
1334
1335                                 /* HOT POTATO! PASS IT ON! */
1336                                 DoOneToAllButSender(source,"FMODE",params,sourceserv);
1337                         }
1338                 }
1339                 else
1340                 /* U-lined servers always win regardless of their TS */
1341                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1342                 {
1343                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1344                          * SHOULD accept it, if its clock is right.
1345                          *
1346                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1347                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1348                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1349                          *
1350                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1351                          * writing the code. It took me a while to come up with this solution.
1352                          *
1353                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1354                          */
1355
1356                         std::deque<std::string> newparams;      /* New parameter list we send back */
1357                         newparams.push_back(params[0]);         /* Target, user or channel */
1358                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1359                         newparams.push_back("");                /* This contains the mode string. For now
1360                                                                  * it's empty, we fill it below.
1361                                                                  */
1362
1363                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1364                          * set to avoid a desync here.
1365                          */
1366                         std::string modebounce = "";
1367                         bool adding = true;
1368                         unsigned int t = 3;
1369                         ModeHandler* mh = NULL;
1370                         char cur_change = 1;
1371                         char old_change = 0;
1372                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1373                         {
1374                                 /* Iterate over all mode chars in the sent set */
1375                                 switch (*x)
1376                                 {
1377                                         /* Adding or subtracting modes? */
1378                                         case '-':
1379                                                 adding = false;
1380                                         break;
1381                                         case '+':
1382                                                 adding = true;
1383                                         break;
1384                                         default:
1385                                                 /* Find the mode handler for this mode */
1386                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1387
1388                                                 /* Got a mode handler?
1389                                                  * This also prevents us bouncing modes we have no handler for.
1390                                                  */
1391                                                 if (mh)
1392                                                 {
1393                                                         ModePair ret;
1394                                                         std::string p = "";
1395
1396                                                         /* Does the mode require a parameter right now?
1397                                                          * If it does, fetch it if we can
1398                                                          */
1399                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1400                                                                 p = params[t++];
1401
1402                                                         /* Call the ModeSet method to determine if its set with the
1403                                                          * given parameter here or not.
1404                                                          */
1405                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1406
1407                                                         /* XXX: Really. Dont ask.
1408                                                          * Determine from if its set combined with what the current
1409                                                          * 'state' is (adding or not) as to wether we should 'invert'
1410                                                          * or 'reinforce' the mode change
1411                                                          */
1412                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1413
1414                                                         /* Quickly determine if we have 'flipped' from + to -,
1415                                                          * or - to +, to prevent unneccessary +/- chars in the
1416                                                          * output string that waste bandwidth
1417                                                          */
1418                                                         if (cur_change != old_change)
1419                                                                 modebounce += cur_change;
1420                                                         old_change = cur_change;
1421
1422                                                         /* Add the mode character to the output string */
1423                                                         modebounce += mh->GetModeChar();
1424
1425                                                         /* We got a parameter back from ModeHandler::ModeSet,
1426                                                          * are we supposed to be sending one out right now?
1427                                                          */
1428                                                         if (ret.second.length())
1429                                                         {
1430                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1431                                                                         /* Yes we're supposed to be sending out
1432                                                                          * the parameter. Make sure it goes
1433                                                                          */
1434                                                                         newparams.push_back(ret.second);
1435                                                         }
1436
1437                                                 }
1438                                         break;
1439                                 }
1440                         }
1441
1442                         /* Update the parameters for FMODE with the new 'bounced' string */
1443                         newparams[2] = modebounce;
1444                         /* Only send it back the way it came, no need to send it anywhere else */
1445                         DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1446                         Instance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1447                 }
1448                 else
1449                 {
1450                         Instance->Log(DEBUG,"Allow modes, TS lower for sender");
1451                         /* The server was ulined, but something iffy is up with the TS.
1452                          * Sound the alarm bells!
1453                          */
1454                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1455                         {
1456                                 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());
1457                         }
1458                         /* Allow the mode, route it to either server or user command handling */
1459                         if (smode)
1460                                 this->Instance->SendMode(modelist,n,who);
1461                         else
1462                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1463
1464                         /* HOT POTATO! PASS IT ON! */
1465                         DoOneToAllButSender(source,"FMODE",params,sourceserv);
1466                 }
1467                 /* Are we supposed to free the userrec? */
1468                 if (smode)
1469                         DELETE(who);
1470
1471                 return true;
1472         }
1473
1474         /** FTOPIC command */
1475         bool ForceTopic(std::string source, std::deque<std::string> &params)
1476         {
1477                 if (params.size() != 4)
1478                         return true;
1479                 time_t ts = atoi(params[1].c_str());
1480                 std::string nsource = source;
1481
1482                 chanrec* c = this->Instance->FindChan(params[0]);
1483                 if (c)
1484                 {
1485                         if ((ts >= c->topicset) || (!*c->topic))
1486                         {
1487                                 std::string oldtopic = c->topic;
1488                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1489                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1490                                 c->topicset = ts;
1491                                 /* if the topic text is the same as the current topic,
1492                                  * dont bother to send the TOPIC command out, just silently
1493                                  * update the set time and set nick.
1494                                  */
1495                                 if (oldtopic != params[3])
1496                                 {
1497                                         userrec* user = this->Instance->FindNick(source);
1498                                         if (!user)
1499                                         {
1500                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1501                                         }
1502                                         else
1503                                         {
1504                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1505                                                 nsource = user->server;
1506                                         }
1507                                         /* all done, send it on its way */
1508                                         params[3] = ":" + params[3];
1509                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
1510                                 }
1511                         }
1512
1513                 }
1514
1515                 return true;
1516         }
1517
1518         /** FJOIN, similar to TS6 SJOIN, but not quite. */
1519         bool ForceJoin(std::string source, std::deque<std::string> &params)
1520         {
1521                 /* 1.1 FJOIN works as follows:
1522                  *
1523                  * Each FJOIN is sent along with a timestamp, and the side with the lowest
1524                  * timestamp 'wins'. From this point on we will refer to this side as the
1525                  * winner. The side with the higher timestamp loses, from this point on we
1526                  * will call this side the loser or losing side. This should be familiar to
1527                  * anyone who's dealt with dreamforge or TS6 before.
1528                  *
1529                  * When two sides of a split heal and this occurs, the following things
1530                  * will happen:
1531                  *
1532                  * If the timestamps are exactly equal, both sides merge their privilages
1533                  * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
1534                  * re-created during a split, this is safe to do.
1535                  *
1536                  *
1537                  * If the timestamps are NOT equal, the losing side removes all privilage
1538                  * modes from all of its users that currently exist in the channel, before
1539                  * introducing new users into the channel which are listed in the FJOIN
1540                  * command's parameters. This means, all modes +ohv, and privilages added
1541                  * by modules, such as +qa. The losing side then LOWERS its timestamp value
1542                  * of the channel to match that of the winning side, and the modes of the
1543                  * users of the winning side are merged in with the losing side. The loser
1544                  * then sends out a set of FMODE commands which 'confirm' that it just
1545                  * removed all privilage modes from its existing users, which allows for
1546                  * services packages to still work correctly without needing to know the
1547                  * timestamping rules which InspIRCd follows. In TS6 servers this is always
1548                  * a problem, and services packages must contain code which explicitly
1549                  * behaves as TS6 does, removing ops from the losing side of a split where
1550                  * neccessary within its internal records, as this state information is
1551                  * not explicitly echoed out in that protocol.
1552                  *
1553                  * The winning side on the other hand will ignore all user modes from the
1554                  * losing side, so only its own modes get applied. Life is simple for those
1555                  * who succeed at internets. :-)
1556                  *
1557                  * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
1558                  * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
1559                  * you ask? Well, quite simply because we don't need to. They'll be sent
1560                  * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
1561                  * the losing side sends any modes for the channel which shouldnt win,
1562                  * they wont as their timestamp will be too high :-)
1563                  */
1564
1565                 if (params.size() < 3)
1566                         return true;
1567
1568                 char first[MAXBUF];             /* The first parameter of the mode command */
1569                 char modestring[MAXBUF];        /* The mode sequence (2nd parameter) of the mode command */
1570                 char* mode_users[127];          /* The values used by the mode command */
1571                 memset(&mode_users,0,sizeof(mode_users));       /* Initialize mode parameters */
1572                 mode_users[0] = first;          /* Set this up to be our on-stack value */
1573                 mode_users[1] = modestring;     /* Same here as above */
1574                 strcpy(modestring,"+");         /* Initialize the mode sequence to just '+' */
1575                 unsigned int modectr = 2;       /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */
1576
1577                 userrec* who = NULL;                    /* User we are currently checking */
1578                 std::string channel = params[0];        /* Channel name, as a string */
1579                 time_t TS = atoi(params[1].c_str());    /* Timestamp given to us for remote side */
1580
1581                 /* Try and find the channel */
1582                 chanrec* chan = this->Instance->FindChan(channel);
1583
1584                 /* Initialize channel name in the mode parameters */
1585                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1586
1587                 /* default TS is a high value, which if we dont have this
1588                  * channel will let the other side apply their modes.
1589                  */
1590                 time_t ourTS = time(NULL)+600;
1591
1592                 /* Does this channel exist? if it does, get its REAL timestamp */
1593                 if (chan)
1594                         ourTS = chan->age;
1595
1596                 /* In 1.1, if they have the newer channel, we immediately clear
1597                  * all status modes from our users. We then accept their modes.
1598                  * If WE have the newer channel its the other side's job to do this.
1599                  * Note that this causes the losing server to send out confirming
1600                  * FMODE lines.
1601                  */
1602                 if (ourTS > TS)
1603                 {
1604                         std::deque<std::string> param_list;
1605
1606                         if (chan)
1607                                 chan->age = TS;
1608
1609                         /* XXX: Lower the TS here */
1610                         ourTS = TS;
1611
1612                         param_list.push_back(channel);
1613                         /* Zap all the privilage modes on our side */
1614                         this->RemoveStatus(Instance->Config->ServerName, param_list);
1615                 }
1616
1617                 /* Put the final parameter of the FJOIN into a tokenstream ready to split it */
1618                 irc::tokenstream users(params[2]);
1619                 std::string item = "*";
1620
1621                 /* do this first, so our mode reversals are correctly received by other servers
1622                  * if there is a TS collision.
1623                  */
1624                 params[2] = ":" + params[2];
1625                 DoOneToAllButSender(source,"FJOIN",params,source);
1626
1627                 /* Now, process every 'prefixes,nick' pair */
1628                 while (item != "")
1629                 {
1630                         /* Find next user */
1631                         item = users.GetToken();
1632
1633                         const char* usr = item.c_str();
1634
1635                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1636                          * (is this even possible?) */
1637                         if (usr && *usr)
1638                         {
1639                                 const char* permissions = usr;
1640                                 int ntimes = 0;
1641                                 char* nm = new char[MAXBUF];
1642                                 char* tnm = nm;
1643
1644                                 /* Iterate through all the prefix values, convert them from prefixes
1645                                  * to mode letters, and append them to the mode sequence
1646                                  */
1647                                 while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
1648                                 {
1649                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1650                                         if (mh)
1651                                         {
1652                                                 /* This is a valid prefix */
1653                                                 ntimes++;
1654                                                 *tnm++ = mh->GetModeChar();
1655                                         }
1656                                         else
1657                                         {
1658                                                 /* Not a valid prefix...
1659                                                  * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
1660                                                  */
1661                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
1662                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
1663                                                 return false;
1664                                         }
1665                                         usr++;
1666                                         permissions++;
1667                                 }
1668
1669                                 /* Null terminate modes */
1670                                 *tnm = 0;
1671                                 /* Advance past the comma, to the nick */
1672                                 usr++;
1673
1674                                 /* Check the user actually exists */
1675                                 who = this->Instance->FindNick(usr);
1676                                 if (who)
1677                                 {
1678                                         /* Did they get any modes? How many times? */
1679                                         strlcat(modestring, nm, MAXBUF);
1680                                         for (int k = 0; k < ntimes; k++)
1681                                                 mode_users[modectr++] = strdup(usr);
1682
1683                                         /* Free temporary buffer used for mode sequence */
1684                                         delete[] nm;
1685
1686                                         /* Check that the user's 'direction' is correct
1687                                          * based on the server sending the FJOIN. We must
1688                                          * check each nickname in turn, because the origin of
1689                                          * the FJOIN may be different to the origin of the nicks
1690                                          * in the command itself.
1691                                          */
1692                                         TreeServer* route_back_again = BestRouteTo(who->server);
1693                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
1694                                         {
1695                                                 /* Oh dear oh dear. */
1696                                                 Instance->Log(DEBUG,"Fake direction in FJOIN, user '%s'",who->nick);
1697                                                 continue;
1698                                         }
1699                                         /* Finally, we can actually place the user into the channel.
1700                                          * We're sure its right. Final answer, phone a friend.
1701                                          */
1702                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
1703
1704                                         /* Have we already queued up MAXMODES modes with parameters
1705                                          * (+qaohv) ready to be sent to the server?
1706                                          */
1707                                         if (modectr >= (MAXMODES-1))
1708                                         {
1709                                                 /* Only actually give the users any status if we lost
1710                                                  * the FJOIN or drew (equal timestamps).
1711                                                  * It isn't actually possible for ourTS to be > TS here,
1712                                                  * only possible to actually have ourTS == TS, or
1713                                                  * ourTS < TS, because if we lost, we already lowered
1714                                                  * our TS above before we entered this loop. We only
1715                                                  * check >= as a safety measure, in case someone stuffed
1716                                                  * up. If someone DID stuff up, it was most likely me.
1717                                                  * Note: I do not like baseball bats in the face...
1718                                                  */
1719                                                 if (ourTS >= TS)
1720                                                 {
1721                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1722                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1723
1724                                                         /* Something stuffed up, and for some reason, the timestamp is
1725                                                          * NOT lowered right now and should be. Lower it. Usually this
1726                                                          * code won't be executed, doubtless someone will remove it some
1727                                                          * day soon.
1728                                                          */
1729                                                         if (ourTS > TS)
1730                                                         {
1731                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1732                                                                 chan->age = TS;
1733                                                                 ourTS = TS;
1734                                                         }
1735                                                 }
1736
1737                                                 /* Reset all this back to defaults, and
1738                                                  * free any ram we have left allocated.
1739                                                  */
1740                                                 strcpy(mode_users[1],"+");
1741                                                 for (unsigned int f = 2; f < modectr; f++)
1742                                                         free(mode_users[f]);
1743                                                 modectr = 2;
1744                                         }
1745                                 }
1746                                 else
1747                                 {
1748                                         /* Remember to free this */
1749                                         delete[] nm;
1750                                         /* If we got here, there's a nick in FJOIN which doesnt exist on this server.
1751                                          * We don't try to process the nickname here (that WOULD cause a segfault because
1752                                          * we'd be playing with null pointers) however, we DO pass the nickname on, just
1753                                          * in case somehow we're desynched, so that other users which might be able to see
1754                                          * the nickname get their fair chance to process it.
1755                                          */
1756                                         Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
1757                                         continue;
1758                                 }
1759                         }
1760                 }
1761
1762                 /* there werent enough modes built up to flush it during FJOIN,
1763                  * or, there are a number left over. flush them out.
1764                  */
1765                 if ((modectr > 2) && (who) && (chan))
1766                 {
1767                         if (ourTS >= TS)
1768                         {
1769                                 /* Our channel is newer than theirs. Evil deeds must be afoot. */
1770                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1771                                 /* Yet again, we can't actually get a true value here, if everything else
1772                                  * is working as it should.
1773                                  */
1774                                 if (ourTS > TS)
1775                                 {
1776                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1777                                         chan->age = TS;
1778                                         ourTS = TS;
1779                                 }
1780                         }
1781
1782                         /* Free anything we have left to free */
1783                         for (unsigned int f = 2; f < modectr; f++)
1784                                 free(mode_users[f]);
1785                 }
1786
1787                 /* All done. That wasnt so bad was it, you can wipe
1788                  * the sweat from your forehead now. :-)
1789                  */
1790                 return true;
1791         }
1792
1793         /** NICK command */
1794         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1795         {
1796                 if (params.size() < 8)
1797                         return true;
1798                 if (params.size() > 8)
1799                 {
1800                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1801                         return true;
1802                 }
1803                 // NICK age nick host dhost ident +modes ip :gecos
1804                 //       0    1   2     3     4      5   6     7
1805                 time_t age = atoi(params[0].c_str());
1806
1807                 /* This used to have a pretty craq'y loop doing the same thing,
1808                  * now we just let the STL do the hard work (more efficiently)
1809                  */
1810                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1811                 if (pos_after_plus != std::string::npos)
1812                         params[5] = params[5].substr(pos_after_plus);
1813
1814                 const char* tempnick = params[1].c_str();
1815                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1816
1817                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1818
1819                 if (iter != this->Instance->clientlist.end())
1820                 {
1821                         // nick collision
1822                         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);
1823                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1824                         userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
1825                         return true;
1826                 }
1827
1828                 userrec* _new = new userrec(this->Instance);
1829                 this->Instance->clientlist[tempnick] = _new;
1830                 _new->SetFd(FD_MAGIC_NUMBER);
1831                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1832                 strlcpy(_new->host, params[2].c_str(),63);
1833                 strlcpy(_new->dhost, params[3].c_str(),63);
1834                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1835                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1836                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1837                 _new->registered = REG_ALL;
1838                 _new->signon = age;
1839
1840                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1841                         _new->modes[(*v)-65] = 1;
1842
1843 #ifdef SUPPORT_IP6LINKS
1844                 if (params[6].find_first_of(":") != std::string::npos)
1845                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1846                 else
1847 #endif
1848                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1849
1850                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1851
1852                 params[7] = ":" + params[7];
1853                 DoOneToAllButSender(source,"NICK",params,source);
1854
1855                 // Increment the Source Servers User Count..
1856                 TreeServer* SourceServer = FindServer(source);
1857                 if (SourceServer)
1858                 {
1859                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1860                         SourceServer->AddUserCount();
1861                 }
1862
1863                 FOREACH_MOD(I_OnPostConnect,OnPostConnect(_new));
1864
1865                 return true;
1866         }
1867
1868         /** Send one or more FJOINs for a channel of users.
1869          * If the length of a single line is more than 480-NICKMAX
1870          * in length, it is split over multiple lines.
1871          */
1872         void SendFJoins(TreeServer* Current, chanrec* c)
1873         {
1874                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1875                 char list[MAXBUF];
1876                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1877
1878                 size_t dlen, curlen;
1879                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1880                 int numusers = 0;
1881                 char* ptr = list + dlen;
1882
1883                 CUList *ulist = c->GetUsers();
1884                 std::vector<userrec*> specific_halfop;
1885                 std::vector<userrec*> specific_voice;
1886                 std::string modes = "";
1887                 std::string params = "";
1888
1889                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1890                 {
1891                         // The first parameter gets a : before it
1892                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1893
1894                         curlen += ptrlen;
1895                         ptr += ptrlen;
1896
1897                         numusers++;
1898
1899                         if (curlen > (480-NICKMAX))
1900                         {
1901                                 this->WriteLine(list);
1902                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1903                                 ptr = list + dlen;
1904                                 ptrlen = 0;
1905                                 numusers = 0;
1906                         }
1907                 }
1908
1909                 if (numusers)
1910                         this->WriteLine(list);
1911
1912                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1913                 {
1914                         modes.append("b");
1915                         params.append(b->data).append(" ");
1916                 }
1917                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1918         }
1919
1920         /** Send G, Q, Z and E lines */
1921         void SendXLines(TreeServer* Current)
1922         {
1923                 char data[MAXBUF];
1924                 std::string n = this->Instance->Config->ServerName;
1925                 const char* sn = n.c_str();
1926                 int iterations = 0;
1927                 /* Yes, these arent too nice looking, but they get the job done */
1928                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1929                 {
1930                         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);
1931                         this->WriteLine(data);
1932                 }
1933                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1934                 {
1935                         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);
1936                         this->WriteLine(data);
1937                 }
1938                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1939                 {
1940                         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);
1941                         this->WriteLine(data);
1942                 }
1943                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1944                 {
1945                         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);
1946                         this->WriteLine(data);
1947                 }
1948                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1949                 {
1950                         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);
1951                         this->WriteLine(data);
1952                 }
1953                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1954                 {
1955                         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);
1956                         this->WriteLine(data);
1957                 }
1958                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1959                 {
1960                         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);
1961                         this->WriteLine(data);
1962                 }
1963                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1964                 {
1965                         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);
1966                         this->WriteLine(data);
1967                 }
1968         }
1969
1970         /** Send channel modes and topics */
1971         void SendChannelModes(TreeServer* Current)
1972         {
1973                 char data[MAXBUF];
1974                 std::deque<std::string> list;
1975                 int iterations = 0;
1976                 std::string n = this->Instance->Config->ServerName;
1977                 const char* sn = n.c_str();
1978                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1979                 {
1980                         SendFJoins(Current, c->second);
1981                         if (*c->second->topic)
1982                         {
1983                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1984                                 this->WriteLine(data);
1985                         }
1986                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1987                         list.clear();
1988                         c->second->GetExtList(list);
1989                         for (unsigned int j = 0; j < list.size(); j++)
1990                         {
1991                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1992                         }
1993                 }
1994         }
1995
1996         /** send all users and their oper state/modes */
1997         void SendUsers(TreeServer* Current)
1998         {
1999                 char data[MAXBUF];
2000                 std::deque<std::string> list;
2001                 int iterations = 0;
2002                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
2003                 {
2004                         if (u->second->registered == REG_ALL)
2005                         {
2006                                 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);
2007                                 this->WriteLine(data);
2008                                 if (*u->second->oper)
2009                                 {
2010                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
2011                                 }
2012                                 if (*u->second->awaymsg)
2013                                 {
2014                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
2015                                 }
2016                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
2017                                 list.clear();
2018                                 u->second->GetExtList(list);
2019                                 for (unsigned int j = 0; j < list.size(); j++)
2020                                 {
2021                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
2022                                 }
2023                         }
2024                 }
2025         }
2026
2027         /** This function is called when we want to send a netburst to a local
2028          * server. There is a set order we must do this, because for example
2029          * users require their servers to exist, and channels require their
2030          * users to exist. You get the idea.
2031          */
2032         void DoBurst(TreeServer* s)
2033         {
2034                 std::string burst = "BURST "+ConvToStr(time(NULL));
2035                 std::string endburst = "ENDBURST";
2036                 // Because by the end of the netburst, it  could be gone!
2037                 std::string name = s->GetName();
2038                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
2039                 this->WriteLine(burst);
2040                 /* send our version string */
2041                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
2042                 /* Send server tree */
2043                 this->SendServers(TreeRoot,s,1);
2044                 /* Send users and their oper status */
2045                 this->SendUsers(s);
2046                 /* Send everything else (channel modes, xlines etc) */
2047                 this->SendChannelModes(s);
2048                 this->SendXLines(s);
2049                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
2050                 this->WriteLine(endburst);
2051                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
2052         }
2053
2054         /** This function is called when we receive data from a remote
2055          * server. We buffer the data in a std::string (it doesnt stay
2056          * there for long), reading using InspSocket::Read() which can
2057          * read up to 16 kilobytes in one operation.
2058          *
2059          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
2060          * THE SOCKET OBJECT FOR US.
2061          */
2062         virtual bool OnDataReady()
2063         {
2064                 char* data = this->Read();
2065                 /* Check that the data read is a valid pointer and it has some content */
2066                 if (data && *data)
2067                 {
2068                         this->in_buffer.append(data);
2069                         /* While there is at least one new line in the buffer,
2070                          * do something useful (we hope!) with it.
2071                          */
2072                         while (in_buffer.find("\n") != std::string::npos)
2073                         {
2074                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
2075                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
2076                                 if (ret.find("\r") != std::string::npos)
2077                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
2078                                 /* Process this one, abort if it
2079                                  * didnt return true.
2080                                  */
2081                                 if (this->ctx_in)
2082                                 {
2083                                         char out[1024];
2084                                         char result[1024];
2085                                         memset(result,0,1024);
2086                                         memset(out,0,1024);
2087                                         Instance->Log(DEBUG,"Original string '%s'",ret.c_str());
2088                                         /* ERROR + CAPAB is still allowed unencryped */
2089                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
2090                                         {
2091                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
2092                                                 if ((nbytes > 0) && (nbytes < 1024))
2093                                                 {
2094                                                         Instance->Log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
2095                                                         ctx_in->Decrypt(out, result, nbytes, 0);
2096                                                         for (int t = 0; t < nbytes; t++)
2097                                                                 if (result[t] == '\7') result[t] = 0;
2098                                                         ret = result;
2099                                                 }
2100                                         }
2101                                 }
2102                                 if (!this->ProcessLine(ret))
2103                                 {
2104                                         Instance->Log(DEBUG,"ProcessLine says no!");
2105                                         return false;
2106                                 }
2107                         }
2108                         return true;
2109                 }
2110                 /* EAGAIN returns an empty but non-NULL string, so this
2111                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2112                  */
2113                 return (data && !*data);
2114         }
2115
2116         int WriteLine(std::string line)
2117         {
2118                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2119                 if (this->ctx_out)
2120                 {
2121                         char result[10240];
2122                         char result64[10240];
2123                         if (this->keylength)
2124                         {
2125                                 // pad it to the key length
2126                                 int n = this->keylength - (line.length() % this->keylength);
2127                                 if (n)
2128                                 {
2129                                         Instance->Log(DEBUG,"Append %d chars to line to make it %d long from %d, key length %d",n,n+line.length(),line.length(),this->keylength);
2130                                         line.append(n,'\7');
2131                                 }
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                         //int from64tobits(char *out, const char *in, int maxlen);
2138                 }
2139                 return this->Write(line + "\r\n");
2140         }
2141
2142         /* Handle ERROR command */
2143         bool Error(std::deque<std::string> &params)
2144         {
2145                 if (params.size() < 1)
2146                         return false;
2147                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2148                 /* we will return false to cause the socket to close. */
2149                 return false;
2150         }
2151
2152         /** remote MOTD. leet, huh? */
2153         bool Motd(std::string prefix, std::deque<std::string> &params)
2154         {
2155                 if (params.size() > 0)
2156                 {
2157                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2158                         {
2159                                 /* It's for our server */
2160                                 string_list results;
2161                                 userrec* source = this->Instance->FindNick(prefix);
2162
2163                                 if (source)
2164                                 {
2165                                         std::deque<std::string> par;
2166                                         par.push_back(prefix);
2167                                         par.push_back("");
2168
2169                                         if (!Instance->Config->MOTD.size())
2170                                         {
2171                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2172                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2173                                                 return true;
2174                                         }
2175
2176                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2177                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2178
2179                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2180                                         {
2181                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2182                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2183                                         }
2184
2185                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2186                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2187                                 }
2188                         }
2189                         else
2190                         {
2191                                 /* Pass it on */
2192                                 userrec* source = this->Instance->FindNick(prefix);
2193                                 if (source)
2194                                         DoOneToOne(prefix, "MOTD", params, params[0]);
2195                         }
2196                 }
2197                 return true;
2198         }
2199
2200         /** remote ADMIN. leet, huh? */
2201         bool Admin(std::string prefix, std::deque<std::string> &params)
2202         {
2203                 if (params.size() > 0)
2204                 {
2205                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2206                         {
2207                                 /* It's for our server */
2208                                 string_list results;
2209                                 userrec* source = this->Instance->FindNick(prefix);
2210
2211                                 if (source)
2212                                 {
2213                                         std::deque<std::string> par;
2214                                         par.push_back(prefix);
2215                                         par.push_back("");
2216
2217                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2218                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2219
2220                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2221                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2222
2223                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2224                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2225
2226                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2227                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2228                                 }
2229                         }
2230                         else
2231                         {
2232                                 /* Pass it on */
2233                                 userrec* source = this->Instance->FindNick(prefix);
2234                                 if (source)
2235                                         DoOneToOne(prefix, "ADMIN", params, params[0]);
2236                         }
2237                 }
2238                 return true;
2239         }
2240
2241         bool Stats(std::string prefix, std::deque<std::string> &params)
2242         {
2243                 /* Get the reply to a STATS query if it matches this servername,
2244                  * and send it back as a load of PUSH queries
2245                  */
2246                 if (params.size() > 1)
2247                 {
2248                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2249                         {
2250                                 /* It's for our server */
2251                                 string_list results;
2252                                 userrec* source = this->Instance->FindNick(prefix);
2253                                 if (source)
2254                                 {
2255                                         std::deque<std::string> par;
2256                                         par.push_back(prefix);
2257                                         par.push_back("");
2258                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2259                                         for (size_t i = 0; i < results.size(); i++)
2260                                         {
2261                                                 par[1] = "::" + results[i];
2262                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2263                                         }
2264                                 }
2265                         }
2266                         else
2267                         {
2268                                 /* Pass it on */
2269                                 userrec* source = this->Instance->FindNick(prefix);
2270                                 if (source)
2271                                         DoOneToOne(prefix, "STATS", params, params[1]);
2272                         }
2273                 }
2274                 return true;
2275         }
2276
2277
2278         /** Because the core won't let users or even SERVERS set +o,
2279          * we use the OPERTYPE command to do this.
2280          */
2281         bool OperType(std::string prefix, std::deque<std::string> &params)
2282         {
2283                 if (params.size() != 1)
2284                 {
2285                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2286                         return true;
2287                 }
2288                 std::string opertype = params[0];
2289                 userrec* u = this->Instance->FindNick(prefix);
2290                 if (u)
2291                 {
2292                         u->modes[UM_OPERATOR] = 1;
2293                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2294                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2295                 }
2296                 return true;
2297         }
2298
2299         /** Because Andy insists that services-compatible servers must
2300          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2301          */
2302         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2303         {
2304                 if (params.size() < 3)
2305                         return true;
2306
2307                 userrec* u = this->Instance->FindNick(params[0]);
2308
2309                 if (u)
2310                 {
2311                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2312                         if (IS_LOCAL(u))
2313                         {
2314                                 std::deque<std::string> par;
2315                                 par.push_back(params[1]);
2316                                 /* This is not required as one is sent in OnUserPostNick below
2317                                  */
2318                                 //DoOneToMany(u->nick,"NICK",par);
2319                                 if (!u->ForceNickChange(params[1].c_str()))
2320                                 {
2321                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2322                                         return true;
2323                                 }
2324                                 u->age = atoi(params[2].c_str());
2325                         }
2326                 }
2327                 return true;
2328         }
2329
2330         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2331         {
2332                 if (params.size() < 2)
2333                         return true;
2334
2335                 userrec* u = this->Instance->FindNick(params[0]);
2336
2337                 if (u)
2338                 {
2339                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2340                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2341                 }
2342                 return true;
2343         }
2344
2345         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2346         {
2347                 if (params.size() < 1)
2348                         return false;
2349
2350                 std::string servermask = params[0];
2351
2352                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2353                 {
2354                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2355                         this->Instance->RehashServer();
2356                         ReadConfiguration(false);
2357                         InitializeDisabledCommands(ServerInstance->Config->DisabledCommands, ServerInstance);
2358                 }
2359                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2360                 return true;
2361         }
2362
2363         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2364         {
2365                 if (params.size() != 2)
2366                         return true;
2367
2368                 std::string nick = params[0];
2369                 userrec* u = this->Instance->FindNick(prefix);
2370                 userrec* who = this->Instance->FindNick(nick);
2371
2372                 if (who)
2373                 {
2374                         /* Prepend kill source, if we don't have one */
2375                         std::string sourceserv = prefix;
2376                         if (u)
2377                         {
2378                                 sourceserv = u->server;
2379                         }
2380                         if (*(params[1].c_str()) != '[')
2381                         {
2382                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2383                         }
2384                         std::string reason = params[1];
2385                         params[1] = ":" + params[1];
2386                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2387                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2388                         userrec::QuitUser(this->Instance,who,reason);
2389                 }
2390                 return true;
2391         }
2392
2393         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2394         {
2395                 if (params.size() < 1)
2396                         return true;
2397
2398                 if (params.size() == 1)
2399                 {
2400                         TreeServer* ServerSource = FindServer(prefix);
2401                         if (ServerSource)
2402                         {
2403                                 ServerSource->SetPingFlag();
2404                         }
2405                 }
2406                 else
2407                 {
2408                         std::string forwardto = params[1];
2409                         if (forwardto == this->Instance->Config->ServerName)
2410                         {
2411                                 /*
2412                                  * this is a PONG for us
2413                                  * if the prefix is a user, check theyre local, and if they are,
2414                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2415                                  * Services might want to send these s->s, but we dont need to yet.
2416                                  */
2417                                 userrec* u = this->Instance->FindNick(prefix);
2418
2419                                 if (u)
2420                                 {
2421                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2422                                 }
2423                         }
2424                         else
2425                         {
2426                                 // not for us, pass it on :)
2427                                 DoOneToOne(prefix,"PONG",params,forwardto);
2428                         }
2429                 }
2430
2431                 return true;
2432         }
2433
2434         bool MetaData(std::string prefix, std::deque<std::string> &params)
2435         {
2436                 if (params.size() < 3)
2437                         return true;
2438
2439                 TreeServer* ServerSource = FindServer(prefix);
2440
2441                 if (ServerSource)
2442                 {
2443                         if (params[0] == "*")
2444                         {
2445                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2446                         }
2447                         else if (*(params[0].c_str()) == '#')
2448                         {
2449                                 chanrec* c = this->Instance->FindChan(params[0]);
2450                                 if (c)
2451                                 {
2452                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2453                                 }
2454                         }
2455                         else if (*(params[0].c_str()) != '#')
2456                         {
2457                                 userrec* u = this->Instance->FindNick(params[0]);
2458                                 if (u)
2459                                 {
2460                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2461                                 }
2462                         }
2463                 }
2464
2465                 params[2] = ":" + params[2];
2466                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2467                 return true;
2468         }
2469
2470         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2471         {
2472                 if (params.size() < 1)
2473                         return true;
2474
2475                 TreeServer* ServerSource = FindServer(prefix);
2476
2477                 if (ServerSource)
2478                 {
2479                         ServerSource->SetVersion(params[0]);
2480                 }
2481                 params[0] = ":" + params[0];
2482                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2483                 return true;
2484         }
2485
2486         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2487         {
2488                 if (params.size() < 1)
2489                         return true;
2490
2491                 userrec* u = this->Instance->FindNick(prefix);
2492
2493                 if (u)
2494                 {
2495                         u->ChangeDisplayedHost(params[0].c_str());
2496                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2497                 }
2498                 return true;
2499         }
2500
2501         bool AddLine(std::string prefix, std::deque<std::string> &params)
2502         {
2503                 if (params.size() < 6)
2504                         return true;
2505
2506                 bool propogate = false;
2507
2508                 switch (*(params[0].c_str()))
2509                 {
2510                         case 'Z':
2511                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2512                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2513                         break;
2514                         case 'Q':
2515                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2516                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2517                         break;
2518                         case 'E':
2519                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2520                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2521                         break;
2522                         case 'G':
2523                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2524                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2525                         break;
2526                         case 'K':
2527                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2528                         break;
2529                         default:
2530                                 /* Just in case... */
2531                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2532                                 propogate = false;
2533                         break;
2534                 }
2535
2536                 /* Send it on its way */
2537                 if (propogate)
2538                 {
2539                         if (atoi(params[4].c_str()))
2540                         {
2541                                 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());
2542                         }
2543                         else
2544                         {
2545                                 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());
2546                         }
2547                         params[5] = ":" + params[5];
2548                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2549                 }
2550                 if (!this->bursting)
2551                 {
2552                         Instance->Log(DEBUG,"Applying lines...");
2553                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2554                 }
2555                 return true;
2556         }
2557
2558         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2559         {
2560                 if (params.size() < 1)
2561                         return true;
2562
2563                 userrec* u = this->Instance->FindNick(prefix);
2564
2565                 if (u)
2566                 {
2567                         u->ChangeName(params[0].c_str());
2568                         params[0] = ":" + params[0];
2569                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2570                 }
2571                 return true;
2572         }
2573
2574         bool Whois(std::string prefix, std::deque<std::string> &params)
2575         {
2576                 if (params.size() < 1)
2577                         return true;
2578
2579                 Instance->Log(DEBUG,"In IDLE command");
2580                 userrec* u = this->Instance->FindNick(prefix);
2581
2582                 if (u)
2583                 {
2584                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2585                         // an incoming request
2586                         if (params.size() == 1)
2587                         {
2588                                 userrec* x = this->Instance->FindNick(params[0]);
2589                                 if ((x) && (IS_LOCAL(x)))
2590                                 {
2591                                         userrec* x = this->Instance->FindNick(params[0]);
2592                                         char signon[MAXBUF];
2593                                         char idle[MAXBUF];
2594
2595                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2596                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2597                                         std::deque<std::string> par;
2598                                         par.push_back(prefix);
2599                                         par.push_back(signon);
2600                                         par.push_back(idle);
2601                                         // ours, we're done, pass it BACK
2602                                         DoOneToOne(params[0],"IDLE",par,u->server);
2603                                 }
2604                                 else
2605                                 {
2606                                         // not ours pass it on
2607                                         DoOneToOne(prefix,"IDLE",params,x->server);
2608                                 }
2609                         }
2610                         else if (params.size() == 3)
2611                         {
2612                                 std::string who_did_the_whois = params[0];
2613                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2614                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2615                                 {
2616                                         // an incoming reply to a whois we sent out
2617                                         std::string nick_whoised = prefix;
2618                                         unsigned long signon = atoi(params[1].c_str());
2619                                         unsigned long idle = atoi(params[2].c_str());
2620                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2621                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2622                                 }
2623                                 else
2624                                 {
2625                                         // not ours, pass it on
2626                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2627                                 }
2628                         }
2629                 }
2630                 return true;
2631         }
2632
2633         bool Push(std::string prefix, std::deque<std::string> &params)
2634         {
2635                 if (params.size() < 2)
2636                         return true;
2637
2638                 userrec* u = this->Instance->FindNick(params[0]);
2639
2640                 if (!u)
2641                         return true;
2642
2643                 if (IS_LOCAL(u))
2644                 {
2645                         u->Write(params[1]);
2646                 }
2647                 else
2648                 {
2649                         // continue the raw onwards
2650                         params[1] = ":" + params[1];
2651                         DoOneToOne(prefix,"PUSH",params,u->server);
2652                 }
2653                 return true;
2654         }
2655
2656         bool Time(std::string prefix, std::deque<std::string> &params)
2657         {
2658                 // :source.server TIME remote.server sendernick
2659                 // :remote.server TIME source.server sendernick TS
2660                 if (params.size() == 2)
2661                 {
2662                         // someone querying our time?
2663                         if (this->Instance->Config->ServerName == params[0])
2664                         {
2665                                 userrec* u = this->Instance->FindNick(params[1]);
2666                                 if (u)
2667                                 {
2668                                         char curtime[256];
2669                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2670                                         params.push_back(curtime);
2671                                         params[0] = prefix;
2672                                         DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2673                                 }
2674                         }
2675                         else
2676                         {
2677                                 // not us, pass it on
2678                                 userrec* u = this->Instance->FindNick(params[1]);
2679                                 if (u)
2680                                         DoOneToOne(prefix,"TIME",params,params[0]);
2681                         }
2682                 }
2683                 else if (params.size() == 3)
2684                 {
2685                         // a response to a previous TIME
2686                         userrec* u = this->Instance->FindNick(params[1]);
2687                         if ((u) && (IS_LOCAL(u)))
2688                         {
2689                         time_t rawtime = atol(params[2].c_str());
2690                         struct tm * timeinfo;
2691                         timeinfo = localtime(&rawtime);
2692                                 char tms[26];
2693                                 snprintf(tms,26,"%s",asctime(timeinfo));
2694                                 tms[24] = 0;
2695                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2696                         }
2697                         else
2698                         {
2699                                 if (u)
2700                                         DoOneToOne(prefix,"TIME",params,u->server);
2701                         }
2702                 }
2703                 return true;
2704         }
2705
2706         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2707         {
2708                 if (params.size() < 1)
2709                         return true;
2710
2711                 if (params.size() == 1)
2712                 {
2713                         std::string stufftobounce = params[0];
2714                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2715                         return true;
2716                 }
2717                 else
2718                 {
2719                         std::string forwardto = params[1];
2720                         if (forwardto == this->Instance->Config->ServerName)
2721                         {
2722                                 // this is a ping for us, send back PONG to the requesting server
2723                                 params[1] = params[0];
2724                                 params[0] = forwardto;
2725                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2726                         }
2727                         else
2728                         {
2729                                 // not for us, pass it on :)
2730                                 DoOneToOne(prefix,"PING",params,forwardto);
2731                         }
2732                         return true;
2733                 }
2734         }
2735
2736         bool RemoveStatus(std::string prefix, std::deque<std::string> &params)
2737         {
2738                 if (params.size() < 1)
2739                         return true;
2740
2741                 chanrec* c = Instance->FindChan(params[0]);
2742
2743                 if (c)
2744                 {
2745                         irc::modestacker modestack(false);
2746                         CUList *ulist = c->GetUsers();
2747                         const char* y[127];
2748                         std::deque<std::string> stackresult;
2749                         std::string x;
2750
2751                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2752                         {
2753                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2754                                 if (modesequence.length())
2755                                 {
2756                                         ServerInstance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2757                                         irc::spacesepstream sep(modesequence);
2758                                         std::string modeletters = sep.GetToken();
2759                                         ServerInstance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2760
2761                                         while (!modeletters.empty())
2762                                         {
2763                                                 char mletter = *(modeletters.begin());
2764                                                 modestack.Push(mletter,sep.GetToken());
2765                                                 ServerInstance->Log(DEBUG,"Push letter = '%c'",mletter);
2766                                                 modeletters.erase(modeletters.begin());
2767                                                 ServerInstance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2768                                         }
2769                                 }
2770                         }
2771
2772                         while (modestack.GetStackedLine(stackresult))
2773                         {
2774                                 ServerInstance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2775                                 stackresult.push_front(ConvToStr(c->age));
2776                                 stackresult.push_front(c->name);
2777                                 DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2778                                 stackresult.erase(stackresult.begin() + 1);
2779                                 ServerInstance->Log(DEBUG,"Stacked items:");
2780                                 for (size_t z = 0; z < stackresult.size(); z++)
2781                                 {
2782                                         y[z] = stackresult[z].c_str();
2783                                         ServerInstance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2784                                 }
2785                                 userrec* n = new userrec(Instance);
2786                                 n->SetFd(FD_MAGIC_NUMBER);
2787                                 Instance->SendMode(y, stackresult.size(), n);
2788                                 delete n;
2789                         }
2790                 }
2791                 return true;
2792         }
2793
2794         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2795         {
2796                 if (params.size() < 4)
2797                         return false;
2798
2799                 std::string servername = params[0];
2800                 std::string password = params[1];
2801                 // hopcount is not used for a remote server, we calculate this ourselves
2802                 std::string description = params[3];
2803                 TreeServer* ParentOfThis = FindServer(prefix);
2804
2805                 if (!ParentOfThis)
2806                 {
2807                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2808                         return false;
2809                 }
2810                 TreeServer* CheckDupe = FindServer(servername);
2811                 if (CheckDupe)
2812                 {
2813                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2814                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2815                         return false;
2816                 }
2817                 TreeServer* Node = new TreeServer(this->Instance,servername,description,ParentOfThis,NULL);
2818                 ParentOfThis->AddChild(Node);
2819                 params[3] = ":" + params[3];
2820                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2821                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2822                 return true;
2823         }
2824
2825         bool Outbound_Reply_Server(std::deque<std::string> &params)
2826         {
2827                 if (params.size() < 4)
2828                         return false;
2829
2830                 irc::string servername = params[0].c_str();
2831                 std::string sname = params[0];
2832                 std::string password = params[1];
2833                 int hops = atoi(params[2].c_str());
2834
2835                 if (hops)
2836                 {
2837                         this->WriteLine("ERROR :Server too far away for authentication");
2838                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2839                         return false;
2840                 }
2841                 std::string description = params[3];
2842                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2843                 {
2844                         if ((x->Name == servername) && (x->RecvPass == password))
2845                         {
2846                                 TreeServer* CheckDupe = FindServer(sname);
2847                                 if (CheckDupe)
2848                                 {
2849                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2850                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2851                                         return false;
2852                                 }
2853                                 // Begin the sync here. this kickstarts the
2854                                 // other side, waiting in WAIT_AUTH_2 state,
2855                                 // into starting their burst, as it shows
2856                                 // that we're happy.
2857                                 this->LinkState = CONNECTED;
2858                                 // we should add the details of this server now
2859                                 // to the servers tree, as a child of the root
2860                                 // node.
2861                                 TreeServer* Node = new TreeServer(this->Instance,sname,description,TreeRoot,this);
2862                                 TreeRoot->AddChild(Node);
2863                                 params[3] = ":" + params[3];
2864                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2865                                 this->bursting = true;
2866                                 this->DoBurst(Node);
2867                                 return true;
2868                         }
2869                 }
2870                 this->WriteLine("ERROR :Invalid credentials");
2871                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2872                 return false;
2873         }
2874
2875         bool Inbound_Server(std::deque<std::string> &params)
2876         {
2877                 if (params.size() < 4)
2878                         return false;
2879
2880                 irc::string servername = params[0].c_str();
2881                 std::string sname = params[0];
2882                 std::string password = params[1];
2883                 int hops = atoi(params[2].c_str());
2884
2885                 if (hops)
2886                 {
2887                         this->WriteLine("ERROR :Server too far away for authentication");
2888                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2889                         return false;
2890                 }
2891                 std::string description = params[3];
2892                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2893                 {
2894                         if ((x->Name == servername) && (x->RecvPass == password))
2895                         {
2896                                 TreeServer* CheckDupe = FindServer(sname);
2897                                 if (CheckDupe)
2898                                 {
2899                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2900                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2901                                         return false;
2902                                 }
2903                                 /* If the config says this link is encrypted, but the remote side
2904                                  * hasnt bothered to send the AES command before SERVER, then we
2905                                  * boot them off as we MUST have this connection encrypted.
2906                                  */
2907                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2908                                 {
2909                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2910                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2911                                         return false;
2912                                 }
2913                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2914                                 this->InboundServerName = sname;
2915                                 this->InboundDescription = description;
2916                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2917                                 // along with the sendpass from this block.
2918                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2919                                 // move to the next state, we are now waiting for THEM.
2920                                 this->LinkState = WAIT_AUTH_2;
2921                                 return true;
2922                         }
2923                 }
2924                 this->WriteLine("ERROR :Invalid credentials");
2925                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2926                 return false;
2927         }
2928
2929         void Split(std::string line, std::deque<std::string> &n)
2930         {
2931                 n.clear();
2932                 irc::tokenstream tokens(line);
2933                 std::string param;
2934                 while ((param = tokens.GetToken()) != "")
2935                         n.push_back(param);
2936                 return;
2937         }
2938
2939         bool ProcessLine(std::string line)
2940         {
2941                 std::deque<std::string> params;
2942                 irc::string command;
2943                 std::string prefix;
2944
2945                 if (line.empty())
2946                         return true;
2947
2948                 line = line.substr(0, line.find_first_of("\r\n"));
2949
2950                 Instance->Log(DEBUG,"IN: %s", line.c_str());
2951
2952                 this->Split(line.c_str(),params);
2953
2954                 if ((params[0][0] == ':') && (params.size() > 1))
2955                 {
2956                         prefix = params[0].substr(1);
2957                         params.pop_front();
2958                 }
2959
2960                 command = params[0].c_str();
2961                 params.pop_front();
2962
2963                 if ((!this->ctx_in) && (command == "AES"))
2964                 {
2965                         std::string sserv = params[0];
2966                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2967                         {
2968                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2969                                 {
2970                                         this->InitAES(x->EncryptionKey,sserv);
2971                                 }
2972                         }
2973
2974                         return true;
2975                 }
2976                 else if ((this->ctx_in) && (command == "AES"))
2977                 {
2978                         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());
2979                 }
2980
2981                 switch (this->LinkState)
2982                 {
2983                         TreeServer* Node;
2984
2985                         case WAIT_AUTH_1:
2986                                 // Waiting for SERVER command from remote server. Server initiating
2987                                 // the connection sends the first SERVER command, listening server
2988                                 // replies with theirs if its happy, then if the initiator is happy,
2989                                 // it starts to send its net sync, which starts the merge, otherwise
2990                                 // it sends an ERROR.
2991                                 if (command == "PASS")
2992                                 {
2993                                         /* Silently ignored */
2994                                 }
2995                                 else if (command == "SERVER")
2996                                 {
2997                                         return this->Inbound_Server(params);
2998                                 }
2999                                 else if (command == "ERROR")
3000                                 {
3001                                         return this->Error(params);
3002                                 }
3003                                 else if (command == "USER")
3004                                 {
3005                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
3006                                         return false;
3007                                 }
3008                                 else if (command == "CAPAB")
3009                                 {
3010                                         return this->Capab(params);
3011                                 }
3012                                 else if ((command == "U") || (command == "S"))
3013                                 {
3014                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3015                                         return false;
3016                                 }
3017                                 else
3018                                 {
3019                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
3020                                         return false;
3021                                 }
3022                         break;
3023                         case WAIT_AUTH_2:
3024                                 // Waiting for start of other side's netmerge to say they liked our
3025                                 // password.
3026                                 if (command == "SERVER")
3027                                 {
3028                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
3029                                         // silently ignore.
3030                                         return true;
3031                                 }
3032                                 else if ((command == "U") || (command == "S"))
3033                                 {
3034                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3035                                         return false;
3036                                 }
3037                                 else if (command == "BURST")
3038                                 {
3039                                         if (params.size())
3040                                         {
3041                                                 /* If a time stamp is provided, try and check syncronization */
3042                                                 time_t THEM = atoi(params[0].c_str());
3043                                                 long delta = THEM-time(NULL);
3044                                                 if ((delta < -600) || (delta > 600))
3045                                                 {
3046                                                         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));
3047                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
3048                                                         return false;
3049                                                 }
3050                                                 else if ((delta < -60) || (delta > 60))
3051                                                 {
3052                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
3053                                                 }
3054                                         }
3055                                         this->LinkState = CONNECTED;
3056                                         Node = new TreeServer(this->Instance,InboundServerName,InboundDescription,TreeRoot,this);
3057                                         TreeRoot->AddChild(Node);
3058                                         params.clear();
3059                                         params.push_back(InboundServerName);
3060                                         params.push_back("*");
3061                                         params.push_back("1");
3062                                         params.push_back(":"+InboundDescription);
3063                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
3064                                         this->bursting = true;
3065                                         this->DoBurst(Node);
3066                                 }
3067                                 else if (command == "ERROR")
3068                                 {
3069                                         return this->Error(params);
3070                                 }
3071                                 else if (command == "CAPAB")
3072                                 {
3073                                         return this->Capab(params);
3074                                 }
3075
3076                         break;
3077                         case LISTENER:
3078                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
3079                                 return false;
3080                         break;
3081                         case CONNECTING:
3082                                 if (command == "SERVER")
3083                                 {
3084                                         // another server we connected to, which was in WAIT_AUTH_1 state,
3085                                         // has just sent us their credentials. If we get this far, theyre
3086                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
3087                                         // if we're happy with this, we should send our netburst which
3088                                         // kickstarts the merge.
3089                                         return this->Outbound_Reply_Server(params);
3090                                 }
3091                                 else if (command == "ERROR")
3092                                 {
3093                                         return this->Error(params);
3094                                 }
3095                         break;
3096                         case CONNECTED:
3097                                 // This is the 'authenticated' state, when all passwords
3098                                 // have been exchanged and anything past this point is taken
3099                                 // as gospel.
3100
3101                                 if (prefix != "")
3102                                 {
3103                                         std::string direction = prefix;
3104                                         userrec* t = this->Instance->FindNick(prefix);
3105                                         if (t)
3106                                         {
3107                                                 direction = t->server;
3108                                         }
3109                                         TreeServer* route_back_again = BestRouteTo(direction);
3110                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3111                                         {
3112                                                 if (route_back_again)
3113                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3114                                                 return true;
3115                                         }
3116
3117                                         /* Fix by brain:
3118                                          * When there is activity on the socket, reset the ping counter so
3119                                          * that we're not wasting bandwidth pinging an active server.
3120                                          */
3121                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3122                                         route_back_again->SetPingFlag();
3123                                 }
3124
3125                                 if (command == "SVSMODE")
3126                                 {
3127                                         /* Services expects us to implement
3128                                          * SVSMODE. In inspircd its the same as
3129                                          * MODE anyway.
3130                                          */
3131                                         command = "MODE";
3132                                 }
3133                                 std::string target = "";
3134                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3135                                  * working with std::string here.
3136                                  */
3137                                 if ((command == "NICK") && (params.size() > 1))
3138                                 {
3139                                         return this->IntroduceClient(prefix,params);
3140                                 }
3141                                 else if (command == "FJOIN")
3142                                 {
3143                                         return this->ForceJoin(prefix,params);
3144                                 }
3145                                 else if (command == "STATS")
3146                                 {
3147                                         return this->Stats(prefix, params);
3148                                 }
3149                                 else if (command == "MOTD")
3150                                 {
3151                                         return this->Motd(prefix, params);
3152                                 }
3153                                 else if (command == "ADMIN")
3154                                 {
3155                                         return this->Admin(prefix, params);
3156                                 }
3157                                 else if (command == "SERVER")
3158                                 {
3159                                         return this->RemoteServer(prefix,params);
3160                                 }
3161                                 else if (command == "ERROR")
3162                                 {
3163                                         return this->Error(params);
3164                                 }
3165                                 else if (command == "OPERTYPE")
3166                                 {
3167                                         return this->OperType(prefix,params);
3168                                 }
3169                                 else if (command == "FMODE")
3170                                 {
3171                                         return this->ForceMode(prefix,params);
3172                                 }
3173                                 else if (command == "KILL")
3174                                 {
3175                                         return this->RemoteKill(prefix,params);
3176                                 }
3177                                 else if (command == "FTOPIC")
3178                                 {
3179                                         return this->ForceTopic(prefix,params);
3180                                 }
3181                                 else if (command == "REHASH")
3182                                 {
3183                                         return this->RemoteRehash(prefix,params);
3184                                 }
3185                                 else if (command == "METADATA")
3186                                 {
3187                                         return this->MetaData(prefix,params);
3188                                 }
3189                                 else if (command == "REMSTATUS")
3190                                 {
3191                                         return this->RemoveStatus(prefix,params);
3192                                 }
3193                                 else if (command == "PING")
3194                                 {
3195                                         /*
3196                                          * We just got a ping from a server that's bursting.
3197                                          * This can't be right, so set them to not bursting, and
3198                                          * apply their lines.
3199                                          */
3200                                         if (this->bursting)
3201                                         {
3202                                                 this->bursting = false;
3203                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3204                                         }
3205                                         if (prefix == "")
3206                                         {
3207                                                 prefix = this->GetName();
3208                                         }
3209                                         return this->LocalPing(prefix,params);
3210                                 }
3211                                 else if (command == "PONG")
3212                                 {
3213                                         /*
3214                                          * We just got a pong from a server that's bursting.
3215                                          * This can't be right, so set them to not bursting, and
3216                                          * apply their lines.
3217                                          */
3218                                         if (this->bursting)
3219                                         {
3220                                                 this->bursting = false;
3221                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3222                                         }
3223                                         if (prefix == "")
3224                                         {
3225                                                 prefix = this->GetName();
3226                                         }
3227                                         return this->LocalPong(prefix,params);
3228                                 }
3229                                 else if (command == "VERSION")
3230                                 {
3231                                         return this->ServerVersion(prefix,params);
3232                                 }
3233                                 else if (command == "FHOST")
3234                                 {
3235                                         return this->ChangeHost(prefix,params);
3236                                 }
3237                                 else if (command == "FNAME")
3238                                 {
3239                                         return this->ChangeName(prefix,params);
3240                                 }
3241                                 else if (command == "ADDLINE")
3242                                 {
3243                                         return this->AddLine(prefix,params);
3244                                 }
3245                                 else if (command == "SVSNICK")
3246                                 {
3247                                         if (prefix == "")
3248                                         {
3249                                                 prefix = this->GetName();
3250                                         }
3251                                         return this->ForceNick(prefix,params);
3252                                 }
3253                                 else if (command == "IDLE")
3254                                 {
3255                                         return this->Whois(prefix,params);
3256                                 }
3257                                 else if (command == "PUSH")
3258                                 {
3259                                         return this->Push(prefix,params);
3260                                 }
3261                                 else if (command == "TIME")
3262                                 {
3263                                         return this->Time(prefix,params);
3264                                 }
3265                                 else if ((command == "KICK") && (IsServer(prefix)))
3266                                 {
3267                                         std::string sourceserv = this->myhost;
3268                                         if (params.size() == 3)
3269                                         {
3270                                                 userrec* user = this->Instance->FindNick(params[1]);
3271                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3272                                                 if (user && chan)
3273                                                 {
3274                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3275                                                                 /* Yikes, the channels gone! */
3276                                                                 delete chan;
3277                                                 }
3278                                         }
3279                                         if (this->InboundServerName != "")
3280                                         {
3281                                                 sourceserv = this->InboundServerName;
3282                                         }
3283                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3284                                 }
3285                                 else if (command == "SVSJOIN")
3286                                 {
3287                                         if (prefix == "")
3288                                         {
3289                                                 prefix = this->GetName();
3290                                         }
3291                                         return this->ServiceJoin(prefix,params);
3292                                 }
3293                                 else if (command == "SQUIT")
3294                                 {
3295                                         if (params.size() == 2)
3296                                         {
3297                                                 this->Squit(FindServer(params[0]),params[1]);
3298                                         }
3299                                         return true;
3300                                 }
3301                                 else if (command == "ENDBURST")
3302                                 {
3303                                         this->bursting = false;
3304                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3305                                         std::string sourceserv = this->myhost;
3306                                         if (this->InboundServerName != "")
3307                                         {
3308                                                 sourceserv = this->InboundServerName;
3309                                         }
3310                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3311                                         return true;
3312                                 }
3313                                 else
3314                                 {
3315                                         // not a special inter-server command.
3316                                         // Emulate the actual user doing the command,
3317                                         // this saves us having a huge ugly parser.
3318                                         userrec* who = this->Instance->FindNick(prefix);
3319                                         std::string sourceserv = this->myhost;
3320                                         if (this->InboundServerName != "")
3321                                         {
3322                                                 sourceserv = this->InboundServerName;
3323                                         }
3324                                         if (who)
3325                                         {
3326                                                 if ((command == "NICK") && (params.size() > 0))
3327                                                 {
3328                                                         /* On nick messages, check that the nick doesnt
3329                                                          * already exist here. If it does, kill their copy,
3330                                                          * and our copy.
3331                                                          */
3332                                                         userrec* x = this->Instance->FindNick(params[0]);
3333                                                         if ((x) && (x != who))
3334                                                         {
3335                                                                 std::deque<std::string> p;
3336                                                                 p.push_back(params[0]);
3337                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3338                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3339                                                                 p.clear();
3340                                                                 p.push_back(prefix);
3341                                                                 p.push_back("Nickname collision");
3342                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3343                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3344                                                                 userrec* y = this->Instance->FindNick(prefix);
3345                                                                 if (y)
3346                                                                 {
3347                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3348                                                                 }
3349                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3350                                                         }
3351                                                 }
3352                                                 // its a user
3353                                                 target = who->server;
3354                                                 const char* strparams[127];
3355                                                 for (unsigned int q = 0; q < params.size(); q++)
3356                                                 {
3357                                                         strparams[q] = params[q].c_str();
3358                                                 }
3359                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3360                                                 {
3361                                                         case CMD_INVALID:
3362                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3363                                                                 return false;
3364                                                         break;
3365                                                         case CMD_FAILURE:
3366                                                                 return true;
3367                                                         break;
3368                                                         default:
3369                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3370                                                         break;
3371                                                 }
3372                                         }
3373                                         else
3374                                         {
3375                                                 // its not a user. Its either a server, or somethings screwed up.
3376                                                 if (IsServer(prefix))
3377                                                 {
3378                                                         target = this->Instance->Config->ServerName;
3379                                                 }
3380                                                 else
3381                                                 {
3382                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3383                                                         return true;
3384                                                 }
3385                                         }
3386                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3387
3388                                 }
3389                                 return true;
3390                         break;
3391                 }
3392                 return true;
3393         }
3394
3395         virtual std::string GetName()
3396         {
3397                 std::string sourceserv = this->myhost;
3398                 if (this->InboundServerName != "")
3399                 {
3400                         sourceserv = this->InboundServerName;
3401                 }
3402                 return sourceserv;
3403         }
3404
3405         virtual void OnTimeout()
3406         {
3407                 if (this->LinkState == CONNECTING)
3408                 {
3409                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3410                         Link* MyLink = FindLink(myhost);
3411                         if (MyLink)
3412                                 DoFailOver(MyLink);
3413                 }
3414         }
3415
3416         virtual void OnClose()
3417         {
3418                 // Connection closed.
3419                 // If the connection is fully up (state CONNECTED)
3420                 // then propogate a netsplit to all peers.
3421                 std::string quitserver = this->myhost;
3422                 if (this->InboundServerName != "")
3423                 {
3424                         quitserver = this->InboundServerName;
3425                 }
3426                 TreeServer* s = FindServer(quitserver);
3427                 if (s)
3428                 {
3429                         Squit(s,"Remote host closed the connection");
3430                 }
3431                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3432         }
3433
3434         virtual int OnIncomingConnection(int newsock, char* ip)
3435         {
3436                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3437                  * or discovering if this port is the server port, we don't allow connections from any
3438                  * IPs for which we don't have a link block.
3439                  */
3440                 bool found = false;
3441
3442                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3443                 if (!found)
3444                 {
3445                         for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
3446                                 if (MatchCIDR(ip, (*i).c_str()))
3447                                         found = true;
3448
3449                         if (!found)
3450                         {
3451                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3452                                 close(newsock);
3453                                 return false;
3454                         }
3455                 }
3456                 TreeSocket* s = new TreeSocket(this->Instance, newsock, ip);
3457                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3458                 return true;
3459         }
3460 };
3461
3462 /** This class is used to resolve server hostnames during /connect and autoconnect.
3463  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3464  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3465  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3466  * will have an IP address which we can then use to continue our connection.
3467  */
3468 class ServernameResolver : public Resolver
3469 {
3470  private:
3471         /** A copy of the Link tag info for what we're connecting to.
3472          * We take a copy, rather than using a pointer, just in case the
3473          * admin takes the tag away and rehashes while the domain is resolving.
3474          */
3475         Link MyLink;
3476  public:
3477         ServernameResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3478         {
3479                 /* Nothing in here, folks */
3480         }
3481
3482         void OnLookupComplete(const std::string &result)
3483         {
3484                 /* Initiate the connection, now that we have an IP to use.
3485                  * Passing a hostname directly to InspSocket causes it to
3486                  * just bail and set its FD to -1.
3487                  */
3488                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3489                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3490                 {
3491                         TreeSocket* newsocket = new TreeSocket(ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3492                         if (newsocket->GetFd() > -1)
3493                         {
3494                                 /* We're all OK */
3495                         }
3496                         else
3497                         {
3498                                 /* Something barfed, show the opers */
3499                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3500                                 delete newsocket;
3501                                 DoFailOver(&MyLink);
3502                         }
3503                 }
3504         }
3505
3506         void OnError(ResolverError e, const std::string &errormessage)
3507         {
3508                 /* Ooops! */
3509                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3510                 DoFailOver(&MyLink);
3511         }
3512 };
3513
3514 class SecurityIPResolver : public Resolver
3515 {
3516  private:
3517         Link MyLink;
3518  public:
3519         SecurityIPResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3520         {
3521         }
3522
3523         void OnLookupComplete(const std::string &result)
3524         {
3525                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3526                 ValidIPs.push_back(result);
3527         }
3528
3529         void OnError(ResolverError e, const std::string &errormessage)
3530         {
3531                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3532         }
3533 };
3534
3535 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3536 {
3537         for (unsigned int c = 0; c < list.size(); c++)
3538         {
3539                 if (list[c] == server)
3540                 {
3541                         return;
3542                 }
3543         }
3544         list.push_back(server);
3545 }
3546
3547 /** returns a list of DIRECT servernames for a specific channel */
3548 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3549 {
3550         CUList *ulist = c->GetUsers();
3551         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3552         {
3553                 if (i->second->GetFd() < 0)
3554                 {
3555                         TreeServer* best = BestRouteTo(i->second->server);
3556                         if (best)
3557                                 AddThisServer(best,list);
3558                 }
3559         }
3560         return;
3561 }
3562
3563 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3564 {
3565         TreeServer* omitroute = BestRouteTo(omit);
3566         if ((command == "NOTICE") || (command == "PRIVMSG"))
3567         {
3568                 if (params.size() >= 2)
3569                 {
3570                         /* Prefixes */
3571                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3572                         {
3573                                 params[0] = params[0].substr(1, params[0].length()-1);
3574                         }
3575                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3576                         {
3577                                 // special routing for private messages/notices
3578                                 userrec* d = ServerInstance->FindNick(params[0]);
3579                                 if (d)
3580                                 {
3581                                         std::deque<std::string> par;
3582                                         par.push_back(params[0]);
3583                                         par.push_back(":"+params[1]);
3584                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3585                                         return true;
3586                                 }
3587                         }
3588                         else if (*(params[0].c_str()) == '$')
3589                         {
3590                                 std::deque<std::string> par;
3591                                 par.push_back(params[0]);
3592                                 par.push_back(":"+params[1]);
3593                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3594                                 return true;
3595                         }
3596                         else
3597                         {
3598                                 ServerInstance->Log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3599                                 chanrec* c = ServerInstance->FindChan(params[0]);
3600                                 if (c)
3601                                 {
3602                                         std::deque<TreeServer*> list;
3603                                         GetListOfServersForChannel(c,list);
3604                                         ServerInstance->Log(DEBUG,"Got a list of %d servers",list.size());
3605                                         unsigned int lsize = list.size();
3606                                         for (unsigned int i = 0; i < lsize; i++)
3607                                         {
3608                                                 TreeSocket* Sock = list[i]->GetSocket();
3609                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3610                                                 {
3611                                                         ServerInstance->Log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3612                                                         Sock->WriteLine(data);
3613                                                 }
3614                                         }
3615                                         return true;
3616                                 }
3617                         }
3618                 }
3619         }
3620         unsigned int items = TreeRoot->ChildCount();
3621         for (unsigned int x = 0; x < items; x++)
3622         {
3623                 TreeServer* Route = TreeRoot->GetChild(x);
3624                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3625                 {
3626                         TreeSocket* Sock = Route->GetSocket();
3627                         if (Sock)
3628                                 Sock->WriteLine(data);
3629                 }
3630         }
3631         return true;
3632 }
3633
3634 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3635 {
3636         TreeServer* omitroute = BestRouteTo(omit);
3637         std::string FullLine = ":" + prefix + " " + command;
3638         unsigned int words = params.size();
3639         for (unsigned int x = 0; x < words; x++)
3640         {
3641                 FullLine = FullLine + " " + params[x];
3642         }
3643         unsigned int items = TreeRoot->ChildCount();
3644         for (unsigned int x = 0; x < items; x++)
3645         {
3646                 TreeServer* Route = TreeRoot->GetChild(x);
3647                 // Send the line IF:
3648                 // The route has a socket (its a direct connection)
3649                 // The route isnt the one to be omitted
3650                 // The route isnt the path to the one to be omitted
3651                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3652                 {
3653                         TreeSocket* Sock = Route->GetSocket();
3654                         if (Sock)
3655                                 Sock->WriteLine(FullLine);
3656                 }
3657         }
3658         return true;
3659 }
3660
3661 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3662 {
3663         std::string FullLine = ":" + prefix + " " + command;
3664         unsigned int words = params.size();
3665         for (unsigned int x = 0; x < words; x++)
3666         {
3667                 FullLine = FullLine + " " + params[x];
3668         }
3669         unsigned int items = TreeRoot->ChildCount();
3670         for (unsigned int x = 0; x < items; x++)
3671         {
3672                 TreeServer* Route = TreeRoot->GetChild(x);
3673                 if (Route && Route->GetSocket())
3674                 {
3675                         TreeSocket* Sock = Route->GetSocket();
3676                         if (Sock)
3677                                 Sock->WriteLine(FullLine);
3678                 }
3679         }
3680         return true;
3681 }
3682
3683 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3684 {
3685         std::string spfx = prefix;
3686         std::string scmd = command;
3687         return DoOneToMany(spfx, scmd, params);
3688 }
3689
3690 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3691 {
3692         std::string spfx = prefix;
3693         std::string scmd = command;
3694         return DoOneToAllButSender(spfx, scmd, params, omit);
3695 }
3696
3697 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3698 {
3699         TreeServer* Route = BestRouteTo(target);
3700         if (Route)
3701         {
3702                 std::string FullLine = ":" + prefix + " " + command;
3703                 unsigned int words = params.size();
3704                 for (unsigned int x = 0; x < words; x++)
3705                 {
3706                         FullLine = FullLine + " " + params[x];
3707                 }
3708                 if (Route && Route->GetSocket())
3709                 {
3710                         TreeSocket* Sock = Route->GetSocket();
3711                         if (Sock)
3712                                 Sock->WriteLine(FullLine);
3713                 }
3714                 return true;
3715         }
3716         else
3717         {
3718                 return false;
3719         }
3720 }
3721
3722 std::vector<TreeSocket*> Bindings;
3723
3724 void ReadConfiguration(bool rebind)
3725 {
3726         Conf = new ConfigReader(ServerInstance);
3727         if (rebind)
3728         {
3729                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3730                 {
3731                         std::string Type = Conf->ReadValue("bind","type",j);
3732                         std::string IP = Conf->ReadValue("bind","address",j);
3733                         long Port = Conf->ReadInteger("bind","port",j,true);
3734                         if (Type == "servers")
3735                         {
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                                         Bindings.push_back(listener);
3744                                 }
3745                                 else
3746                                 {
3747                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3748                                         listener->Close();
3749                                         DELETE(listener);
3750                                 }
3751                         }
3752                 }
3753         }
3754         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3755         HideULines = Conf->ReadFlag("options","hideulines",0);
3756         LinkBlocks.clear();
3757         ValidIPs.clear();
3758         for (int j =0; j < Conf->Enumerate("link"); j++)
3759         {
3760                 Link L;
3761                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3762                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3763                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3764                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3765                 L.Port = Conf->ReadInteger("link","port",j,true);
3766                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3767                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3768                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3769                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3770                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3771                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3772                 /* Bugfix by brain, do not allow people to enter bad configurations */
3773                 if (L.Name != ServerInstance->Config->ServerName)
3774                 {
3775                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3776                         {
3777                                 ValidIPs.push_back(L.IPAddr);
3778
3779                                 if (Allow.length())
3780                                         ValidIPs.push_back(Allow);
3781
3782                                 /* Needs resolving */
3783                                 insp_inaddr binip;
3784                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3785                                 {
3786                                         try
3787                                         {
3788                                                 SecurityIPResolver* sr = new SecurityIPResolver(ServerInstance, L.IPAddr, L);
3789                                                 ServerInstance->AddResolver(sr);
3790                                         }
3791                                         catch (ModuleException& e)
3792                                         {
3793                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3794                                         }
3795                                 }
3796
3797                                 LinkBlocks.push_back(L);
3798                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3799                         }
3800                         else
3801                         {
3802                                 if (L.IPAddr == "")
3803                                 {
3804                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3805                                 }
3806                                 else if (L.RecvPass == "")
3807                                 {
3808                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3809                                 }
3810                                 else if (L.SendPass == "")
3811                                 {
3812                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3813                                 }
3814                                 else if (L.Name == "")
3815                                 {
3816                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3817                                 }
3818                                 else if (!L.Port)
3819                                 {
3820                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3821                                 }
3822                         }
3823                 }
3824                 else
3825                 {
3826                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3827                 }
3828         }
3829         DELETE(Conf);
3830 }
3831
3832
3833 class ModuleSpanningTree : public Module
3834 {
3835         std::vector<TreeSocket*> Bindings;
3836         int line;
3837         int NumServers;
3838         unsigned int max_local;
3839         unsigned int max_global;
3840         cmd_rconnect* command_rconnect;
3841
3842  public:
3843
3844         ModuleSpanningTree(InspIRCd* Me)
3845                 : Module::Module(Me), max_local(0), max_global(0)
3846         {
3847
3848                 Bindings.clear();
3849
3850                 ::ServerInstance = Me;
3851
3852                 // Create the root of the tree
3853                 TreeRoot = new TreeServer(ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3854
3855                 ReadConfiguration(true);
3856
3857                 command_rconnect = new cmd_rconnect(ServerInstance, this);
3858                 ServerInstance->AddCommand(command_rconnect);
3859         }
3860
3861         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3862         {
3863                 std::string Parent = TreeRoot->GetName();
3864                 if (Current->GetParent())
3865                 {
3866                         Parent = Current->GetParent()->GetName();
3867                 }
3868                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3869                 {
3870                         if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3871                         {
3872                                 if (*user->oper)
3873                                 {
3874                                          ShowLinks(Current->GetChild(q),user,hops+1);
3875                                 }
3876                         }
3877                         else
3878                         {
3879                                 ShowLinks(Current->GetChild(q),user,hops+1);
3880                         }
3881                 }
3882                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3883                 if ((HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3884                         return;
3885                 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());
3886         }
3887
3888         int CountLocalServs()
3889         {
3890                 return TreeRoot->ChildCount();
3891         }
3892
3893         int CountServs()
3894         {
3895                 return serverlist.size();
3896         }
3897
3898         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3899         {
3900                 ShowLinks(TreeRoot,user,0);
3901                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3902                 return;
3903         }
3904
3905         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3906         {
3907                 unsigned int n_users = ServerInstance->UserCount();
3908
3909                 /* Only update these when someone wants to see them, more efficient */
3910                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3911                         max_local = ServerInstance->LocalUserCount();
3912                 if (n_users > max_global)
3913                         max_global = n_users;
3914
3915                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3916                 if (ServerInstance->OperCount())
3917                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3918                 if (ServerInstance->UnregisteredUserCount())
3919                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3920                 if (ServerInstance->ChannelCount())
3921                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3922                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3923                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3924                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3925                 return;
3926         }
3927
3928         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3929
3930         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3931         {
3932                 if (line < 128)
3933                 {
3934                         for (int t = 0; t < depth; t++)
3935                         {
3936                                 matrix[line][t] = ' ';
3937                         }
3938
3939                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3940                         // a 'Spacer' String to compensate.
3941                         char spacer[40];
3942
3943                         memset(spacer,' ',40);
3944                         if ((40 - Current->GetName().length() - depth) > 1) {
3945                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3946                         }
3947                         else
3948                         {
3949                                 spacer[5] = '\0';
3950                         }
3951
3952                         float percent;
3953                         char text[80];
3954                         if (ServerInstance->clientlist.size() == 0) {
3955                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3956                                 percent = 0;
3957                         }
3958                         else
3959                         {
3960                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3961                         }
3962                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3963                         totusers += Current->GetUserCount();
3964                         totservers++;
3965                         strlcpy(&matrix[line][depth],text,80);
3966                         line++;
3967                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3968                         {
3969                                 if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3970                                 {
3971                                         if (*user->oper)
3972                                         {
3973                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3974                                         }
3975                                 }
3976                                 else
3977                                 {
3978                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3979                                 }
3980                         }
3981                 }
3982         }
3983
3984         int HandleMotd(const char** parameters, int pcnt, userrec* user)
3985         {
3986                 if (pcnt > 0)
3987                 {
3988                         /* Remote MOTD, the server is within the 1st parameter */
3989                         std::deque<std::string> params;
3990                         params.push_back(parameters[0]);
3991
3992                         /* Send it out remotely, generate no reply yet */
3993                         TreeServer* s = FindServerMask(parameters[0]);
3994                         if (s)
3995                         {
3996                                 DoOneToOne(user->nick, "MOTD", params, s->GetName());
3997                         }
3998                         else
3999                         {
4000                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4001                         }
4002                         return 1;
4003                 }
4004                 return 0;
4005         }
4006
4007         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
4008         {
4009                 if (pcnt > 0)
4010                 {
4011                         /* Remote ADMIN, the server is within the 1st parameter */
4012                         std::deque<std::string> params;
4013                         params.push_back(parameters[0]);
4014
4015                         /* Send it out remotely, generate no reply yet */
4016                         TreeServer* s = FindServerMask(parameters[0]);
4017                         if (s)
4018                         {
4019                                 DoOneToOne(user->nick, "ADMIN", params, s->GetName());
4020                         }
4021                         else
4022                         {
4023                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4024                         }
4025                         return 1;
4026                 }
4027                 return 0;
4028         }
4029
4030         int HandleStats(const char** parameters, int pcnt, userrec* user)
4031         {
4032                 if (pcnt > 1)
4033                 {
4034                         /* Remote STATS, the server is within the 2nd parameter */
4035                         std::deque<std::string> params;
4036                         params.push_back(parameters[0]);
4037                         params.push_back(parameters[1]);
4038                         /* Send it out remotely, generate no reply yet */
4039                         TreeServer* s = FindServerMask(parameters[1]);
4040                         if (s)
4041                         {
4042                                 params[1] = s->GetName();
4043                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
4044                         }
4045                         else
4046                         {
4047                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4048                         }
4049                         return 1;
4050                 }
4051                 return 0;
4052         }
4053
4054         // Ok, prepare to be confused.
4055         // After much mulling over how to approach this, it struck me that
4056         // the 'usual' way of doing a /MAP isnt the best way. Instead of
4057         // keeping track of a ton of ascii characters, and line by line
4058         // under recursion working out where to place them using multiplications
4059         // and divisons, we instead render the map onto a backplane of characters
4060         // (a character matrix), then draw the branches as a series of "L" shapes
4061         // from the nodes. This is not only friendlier on CPU it uses less stack.
4062
4063         void HandleMap(const char** parameters, int pcnt, userrec* user)
4064         {
4065                 // This array represents a virtual screen which we will
4066                 // "scratch" draw to, as the console device of an irc
4067                 // client does not provide for a proper terminal.
4068                 float totusers = 0;
4069                 float totservers = 0;
4070                 char matrix[128][80];
4071                 for (unsigned int t = 0; t < 128; t++)
4072                 {
4073                         matrix[t][0] = '\0';
4074                 }
4075                 line = 0;
4076                 // The only recursive bit is called here.
4077                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
4078                 // Process each line one by one. The algorithm has a limit of
4079                 // 128 servers (which is far more than a spanning tree should have
4080                 // anyway, so we're ok). This limit can be raised simply by making
4081                 // the character matrix deeper, 128 rows taking 10k of memory.
4082                 for (int l = 1; l < line; l++)
4083                 {
4084                         // scan across the line looking for the start of the
4085                         // servername (the recursive part of the algorithm has placed
4086                         // the servers at indented positions depending on what they
4087                         // are related to)
4088                         int first_nonspace = 0;
4089                         while (matrix[l][first_nonspace] == ' ')
4090                         {
4091                                 first_nonspace++;
4092                         }
4093                         first_nonspace--;
4094                         // Draw the `- (corner) section: this may be overwritten by
4095                         // another L shape passing along the same vertical pane, becoming
4096                         // a |- (branch) section instead.
4097                         matrix[l][first_nonspace] = '-';
4098                         matrix[l][first_nonspace-1] = '`';
4099                         int l2 = l - 1;
4100                         // Draw upwards until we hit the parent server, causing possibly
4101                         // other corners (`-) to become branches (|-)
4102                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
4103                         {
4104                                 matrix[l2][first_nonspace-1] = '|';
4105                                 l2--;
4106                         }
4107                 }
4108                 // dump the whole lot to the user. This is the easy bit, honest.
4109                 for (int t = 0; t < line; t++)
4110                 {
4111                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4112                 }
4113                 float avg_users = totusers / totservers;
4114                 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);
4115         user->WriteServ("007 %s :End of /MAP",user->nick);
4116                 return;
4117         }
4118
4119         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4120         {
4121                 TreeServer* s = FindServerMask(parameters[0]);
4122                 if (s)
4123                 {
4124                         if (s == TreeRoot)
4125                         {
4126                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4127                                 return 1;
4128                         }
4129                         TreeSocket* sock = s->GetSocket();
4130                         if (sock)
4131                         {
4132                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4133                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4134                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
4135                                 ServerInstance->SE->DelFd(sock);
4136                                 sock->Close();
4137                                 delete sock;
4138                         }
4139                         else
4140                         {
4141                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
4142                         }
4143                 }
4144                 else
4145                 {
4146                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4147                 }
4148                 return 1;
4149         }
4150
4151         int HandleTime(const char** parameters, int pcnt, userrec* user)
4152         {
4153                 if ((IS_LOCAL(user)) && (pcnt))
4154                 {
4155                         TreeServer* found = FindServerMask(parameters[0]);
4156                         if (found)
4157                         {
4158                                 // we dont' override for local server
4159                                 if (found == TreeRoot)
4160                                         return 0;
4161
4162                                 std::deque<std::string> params;
4163                                 params.push_back(found->GetName());
4164                                 params.push_back(user->nick);
4165                                 DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4166                         }
4167                         else
4168                         {
4169                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4170                         }
4171                 }
4172                 return 1;
4173         }
4174
4175         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4176         {
4177                 if ((IS_LOCAL(user)) && (pcnt > 1))
4178                 {
4179                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4180                         if ((remote) && (remote->GetFd() < 0))
4181                         {
4182                                 std::deque<std::string> params;
4183                                 params.push_back(parameters[1]);
4184                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
4185                                 return 1;
4186                         }
4187                         else if (!remote)
4188                         {
4189                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4190                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4191                                 return 1;
4192                         }
4193                 }
4194                 return 0;
4195         }
4196
4197         void DoPingChecks(time_t curtime)
4198         {
4199                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
4200                 {
4201                         TreeServer* serv = TreeRoot->GetChild(j);
4202                         TreeSocket* sock = serv->GetSocket();
4203                         if (sock)
4204                         {
4205                                 if (curtime >= serv->NextPingTime())
4206                                 {
4207                                         if (serv->AnsweredLastPing())
4208                                         {
4209                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4210                                                 serv->SetNextPingTime(curtime + 60);
4211                                         }
4212                                         else
4213                                         {
4214                                                 // they didnt answer, boot them
4215                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4216                                                 sock->Squit(serv,"Ping timeout");
4217                                                 ServerInstance->SE->DelFd(sock);
4218                                                 sock->Close();
4219                                                 delete sock;
4220                                                 return;
4221                                         }
4222                                 }
4223                         }
4224                 }
4225         }
4226
4227         void ConnectServer(Link* x)
4228         {
4229                 insp_inaddr binip;
4230
4231                 /* Do we already have an IP? If so, no need to resolve it. */
4232                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4233                 {
4234                         TreeSocket* newsocket = new TreeSocket(ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4235                         if (newsocket->GetFd() > -1)
4236                         {
4237                                 /* Handled automatically on success */
4238                         }
4239                         else
4240                         {
4241                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4242                                 delete newsocket;
4243                                 this->DoFailOver(x);
4244                         }
4245                 }
4246                 else
4247                 {
4248                         try
4249                         {
4250                                 ServernameResolver* snr = new ServernameResolver(ServerInstance,x->IPAddr, *x);
4251                                 ServerInstance->AddResolver(snr);
4252                         }
4253                         catch (ModuleException& e)
4254                         {
4255                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4256                                 this->DoFailOver(x);
4257                         }
4258                 }
4259         }
4260
4261         void DoFailOver(Link* x)
4262         {
4263                 if (x->FailOver.length())
4264                 {
4265                         if (x->FailOver == x->Name)
4266                         {
4267                                 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());
4268                                 return;
4269                         }
4270                         Link* TryThisOne = this->FindLink(x->FailOver.c_str());
4271                         if (TryThisOne)
4272                         {
4273                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
4274                                 ConnectServer(TryThisOne);
4275                         }
4276                         else
4277                         {
4278                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
4279                         }
4280                 }
4281         }
4282
4283         Link* FindLink(const std::string& name)
4284         {
4285                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4286                 {
4287                         if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
4288                         {
4289                                 return &(*x);
4290                         }
4291                 }
4292                 return NULL;
4293         }
4294
4295         void AutoConnectServers(time_t curtime)
4296         {
4297                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4298                 {
4299                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4300                         {
4301                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4302                                 x->NextConnectTime = curtime + x->AutoConnect;
4303                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4304                                 if (x->FailOver.length())
4305                                 {
4306                                         TreeServer* CheckFailOver = FindServer(x->FailOver.c_str());
4307                                         if (CheckFailOver)
4308                                         {
4309                                                 /* The failover for this server is currently a member of the network.
4310                                                  * The failover probably succeeded, where the main link did not.
4311                                                  * Don't try the main link until the failover is gone again.
4312                                                  */
4313                                                 continue;
4314                                         }
4315                                 }
4316                                 if (!CheckDupe)
4317                                 {
4318                                         // an autoconnected server is not connected. Check if its time to connect it
4319                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4320                                         this->ConnectServer(&(*x));
4321                                 }
4322                         }
4323                 }
4324         }
4325
4326         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4327         {
4328                 // we've already checked if pcnt > 0, so this is safe
4329                 TreeServer* found = FindServerMask(parameters[0]);
4330                 if (found)
4331                 {
4332                         std::string Version = found->GetVersion();
4333                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4334                         if (found == TreeRoot)
4335                         {
4336                                 std::stringstream out(ServerInstance->Config->data005);
4337                                 std::string token = "";
4338                                 std::string line5 = "";
4339                                 int token_counter = 0;
4340
4341                                 while (!out.eof())
4342                                 {
4343                                         out >> token;
4344                                         line5 = line5 + token + " ";
4345                                         token_counter++;
4346
4347                                         if ((token_counter >= 13) || (out.eof() == true))
4348                                         {
4349                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4350                                                 line5 = "";
4351                                                 token_counter = 0;
4352                                         }
4353                                 }
4354                         }
4355                 }
4356                 else
4357                 {
4358                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4359                 }
4360                 return 1;
4361         }
4362
4363         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4364         {
4365                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4366                 {
4367                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4368                         {
4369                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4370                                 if (!CheckDupe)
4371                                 {
4372                                         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);
4373                                         ConnectServer(&(*x));
4374                                         return 1;
4375                                 }
4376                                 else
4377                                 {
4378                                         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());
4379                                         return 1;
4380                                 }
4381                         }
4382                 }
4383                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4384                 return 1;
4385         }
4386
4387         virtual int OnStats(char statschar, userrec* user, string_list &results)
4388         {
4389                 if (statschar == 'c')
4390                 {
4391                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
4392                         {
4393                                 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');
4394                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
4395                         }
4396                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4397                         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);
4398                         return 1;
4399                 }
4400                 return 0;
4401         }
4402
4403         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4404         {
4405                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4406                 if (!validated)
4407                         return 0;
4408
4409                 if (command == "CONNECT")
4410                 {
4411                         return this->HandleConnect(parameters,pcnt,user);
4412                 }
4413                 else if (command == "STATS")
4414                 {
4415                         return this->HandleStats(parameters,pcnt,user);
4416                 }
4417                 else if (command == "MOTD")
4418                 {
4419                         return this->HandleMotd(parameters,pcnt,user);
4420                 }
4421                 else if (command == "ADMIN")
4422                 {
4423                         return this->HandleAdmin(parameters,pcnt,user);
4424                 }
4425                 else if (command == "SQUIT")
4426                 {
4427                         return this->HandleSquit(parameters,pcnt,user);
4428                 }
4429                 else if (command == "MAP")
4430                 {
4431                         this->HandleMap(parameters,pcnt,user);
4432                         return 1;
4433                 }
4434                 else if ((command == "TIME") && (pcnt > 0))
4435                 {
4436                         return this->HandleTime(parameters,pcnt,user);
4437                 }
4438                 else if (command == "LUSERS")
4439                 {
4440                         this->HandleLusers(parameters,pcnt,user);
4441                         return 1;
4442                 }
4443                 else if (command == "LINKS")
4444                 {
4445                         this->HandleLinks(parameters,pcnt,user);
4446                         return 1;
4447                 }
4448                 else if (command == "WHOIS")
4449                 {
4450                         if (pcnt > 1)
4451                         {
4452                                 // remote whois
4453                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4454                         }
4455                 }
4456                 else if ((command == "VERSION") && (pcnt > 0))
4457                 {
4458                         this->HandleVersion(parameters,pcnt,user);
4459                         return 1;
4460                 }
4461
4462                 return 0;
4463         }
4464
4465         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4466         {
4467                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4468                 {
4469                         // this bit of code cleverly routes all module commands
4470                         // to all remote severs *automatically* so that modules
4471                         // can just handle commands locally, without having
4472                         // to have any special provision in place for remote
4473                         // commands and linking protocols.
4474                         std::deque<std::string> params;
4475                         params.clear();
4476                         for (int j = 0; j < pcnt; j++)
4477                         {
4478                                 if (strchr(parameters[j],' '))
4479                                 {
4480                                         params.push_back(":" + std::string(parameters[j]));
4481                                 }
4482                                 else
4483                                 {
4484                                         params.push_back(std::string(parameters[j]));
4485                                 }
4486                         }
4487                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4488                         DoOneToMany(user->nick,command,params);
4489                 }
4490         }
4491
4492         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4493         {
4494                 TreeServer* s = FindServer(servername);
4495                 if (s)
4496                 {
4497                         description = s->GetDesc();
4498                 }
4499         }
4500
4501         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4502         {
4503                 if (IS_LOCAL(source))
4504                 {
4505                         std::deque<std::string> params;
4506                         params.push_back(dest->nick);
4507                         params.push_back(channel->name);
4508                         DoOneToMany(source->nick,"INVITE",params);
4509                 }
4510         }
4511
4512         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4513         {
4514                 std::deque<std::string> params;
4515                 params.push_back(chan->name);
4516                 params.push_back(":"+topic);
4517                 DoOneToMany(user->nick,"TOPIC",params);
4518         }
4519
4520         virtual void OnWallops(userrec* user, const std::string &text)
4521         {
4522                 if (IS_LOCAL(user))
4523                 {
4524                         std::deque<std::string> params;
4525                         params.push_back(":"+text);
4526                         DoOneToMany(user->nick,"WALLOPS",params);
4527                 }
4528         }
4529
4530         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4531         {
4532                 if (target_type == TYPE_USER)
4533                 {
4534                         userrec* d = (userrec*)dest;
4535                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4536                         {
4537                                 std::deque<std::string> params;
4538                                 params.clear();
4539                                 params.push_back(d->nick);
4540                                 params.push_back(":"+text);
4541                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4542                         }
4543                 }
4544                 else if (target_type == TYPE_CHANNEL)
4545                 {
4546                         if (IS_LOCAL(user))
4547                         {
4548                                 chanrec *c = (chanrec*)dest;
4549                                 if (c)
4550                                 {
4551                                         std::string cname = c->name;
4552                                         if (status)
4553                                                 cname = status + cname;
4554                                         std::deque<TreeServer*> list;
4555                                         GetListOfServersForChannel(c,list);
4556                                         unsigned int ucount = list.size();
4557                                         for (unsigned int i = 0; i < ucount; i++)
4558                                         {
4559                                                 TreeSocket* Sock = list[i]->GetSocket();
4560                                                 if (Sock)
4561                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4562                                         }
4563                                 }
4564                         }
4565                 }
4566                 else if (target_type == TYPE_SERVER)
4567                 {
4568                         if (IS_LOCAL(user))
4569                         {
4570                                 char* target = (char*)dest;
4571                                 std::deque<std::string> par;
4572                                 par.push_back(target);
4573                                 par.push_back(":"+text);
4574                                 DoOneToMany(user->nick,"NOTICE",par);
4575                         }
4576                 }
4577         }
4578
4579         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4580         {
4581                 if (target_type == TYPE_USER)
4582                 {
4583                         // route private messages which are targetted at clients only to the server
4584                         // which needs to receive them
4585                         userrec* d = (userrec*)dest;
4586                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4587                         {
4588                                 std::deque<std::string> params;
4589                                 params.clear();
4590                                 params.push_back(d->nick);
4591                                 params.push_back(":"+text);
4592                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4593                         }
4594                 }
4595                 else if (target_type == TYPE_CHANNEL)
4596                 {
4597                         if (IS_LOCAL(user))
4598                         {
4599                                 chanrec *c = (chanrec*)dest;
4600                                 if (c)
4601                                 {
4602                                         std::string cname = c->name;
4603                                         if (status)
4604                                                 cname = status + cname;
4605                                         std::deque<TreeServer*> list;
4606                                         GetListOfServersForChannel(c,list);
4607                                         unsigned int ucount = list.size();
4608                                         for (unsigned int i = 0; i < ucount; i++)
4609                                         {
4610                                                 TreeSocket* Sock = list[i]->GetSocket();
4611                                                 if (Sock)
4612                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4613                                         }
4614                                 }
4615                         }
4616                 }
4617                 else if (target_type == TYPE_SERVER)
4618                 {
4619                         if (IS_LOCAL(user))
4620                         {
4621                                 char* target = (char*)dest;
4622                                 std::deque<std::string> par;
4623                                 par.push_back(target);
4624                                 par.push_back(":"+text);
4625                                 DoOneToMany(user->nick,"PRIVMSG",par);
4626                         }
4627                 }
4628         }
4629
4630         virtual void OnBackgroundTimer(time_t curtime)
4631         {
4632                 AutoConnectServers(curtime);
4633                 DoPingChecks(curtime);
4634         }
4635
4636         virtual void OnUserJoin(userrec* user, chanrec* channel)
4637         {
4638                 // Only do this for local users
4639                 if (IS_LOCAL(user))
4640                 {
4641                         std::deque<std::string> params;
4642                         params.clear();
4643                         params.push_back(channel->name);
4644                         // set up their permissions and the channel TS with FJOIN.
4645                         // All users are FJOINed now, because a module may specify
4646                         // new joining permissions for the user.
4647                         params.clear();
4648                         params.push_back(channel->name);
4649                         params.push_back(ConvToStr(channel->age));
4650                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4651                         DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4652                 }
4653         }
4654
4655         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4656         {
4657                 // only occurs for local clients
4658                 if (user->registered != REG_ALL)
4659                         return;
4660                 std::deque<std::string> params;
4661                 params.push_back(newhost);
4662                 DoOneToMany(user->nick,"FHOST",params);
4663         }
4664
4665         virtual void OnChangeName(userrec* user, const std::string &gecos)
4666         {
4667                 // only occurs for local clients
4668                 if (user->registered != REG_ALL)
4669                         return;
4670                 std::deque<std::string> params;
4671                 params.push_back(gecos);
4672                 DoOneToMany(user->nick,"FNAME",params);
4673         }
4674
4675         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4676         {
4677                 if (IS_LOCAL(user))
4678                 {
4679                         std::deque<std::string> params;
4680                         params.push_back(channel->name);
4681                         if (partmessage != "")
4682                                 params.push_back(":"+partmessage);
4683                         DoOneToMany(user->nick,"PART",params);
4684                 }
4685         }
4686
4687         virtual void OnUserConnect(userrec* user)
4688         {
4689                 char agestr[MAXBUF];
4690                 if (IS_LOCAL(user))
4691                 {
4692                         std::deque<std::string> params;
4693                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4694                         params.push_back(agestr);
4695                         params.push_back(user->nick);
4696                         params.push_back(user->host);
4697                         params.push_back(user->dhost);
4698                         params.push_back(user->ident);
4699                         params.push_back("+"+std::string(user->FormatModes()));
4700                         params.push_back(user->GetIPString());
4701                         params.push_back(":"+std::string(user->fullname));
4702                         DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4703
4704                         // User is Local, change needs to be reflected!
4705                         TreeServer* SourceServer = FindServer(user->server);
4706                         if (SourceServer)
4707                         {
4708                                 SourceServer->AddUserCount();
4709                         }
4710
4711                 }
4712         }
4713
4714         virtual void OnUserQuit(userrec* user, const std::string &reason)
4715         {
4716                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4717                 {
4718                         std::deque<std::string> params;
4719                         params.push_back(":"+reason);
4720                         DoOneToMany(user->nick,"QUIT",params);
4721                 }
4722                 // Regardless, We need to modify the user Counts..
4723                 TreeServer* SourceServer = FindServer(user->server);
4724                 if (SourceServer)
4725                 {
4726                         SourceServer->DelUserCount();
4727                 }
4728
4729         }
4730
4731         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4732         {
4733                 if (IS_LOCAL(user))
4734                 {
4735                         std::deque<std::string> params;
4736                         params.push_back(user->nick);
4737                         DoOneToMany(oldnick,"NICK",params);
4738                 }
4739         }
4740
4741         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4742         {
4743                 if ((source) && (IS_LOCAL(source)))
4744                 {
4745                         std::deque<std::string> params;
4746                         params.push_back(chan->name);
4747                         params.push_back(user->nick);
4748                         params.push_back(":"+reason);
4749                         DoOneToMany(source->nick,"KICK",params);
4750                 }
4751                 else if (!source)
4752                 {
4753                         std::deque<std::string> params;
4754                         params.push_back(chan->name);
4755                         params.push_back(user->nick);
4756                         params.push_back(":"+reason);
4757                         DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4758                 }
4759         }
4760
4761         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4762         {
4763                 std::deque<std::string> params;
4764                 params.push_back(dest->nick);
4765                 params.push_back(":"+reason);
4766                 DoOneToMany(source->nick,"KILL",params);
4767         }
4768
4769         virtual void OnRehash(const std::string &parameter)
4770         {
4771                 if (parameter != "")
4772                 {
4773                         std::deque<std::string> params;
4774                         params.push_back(parameter);
4775                         DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4776                         // check for self
4777                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4778                         {
4779                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4780                                 ServerInstance->RehashServer();
4781                         }
4782                 }
4783                 ReadConfiguration(false);
4784         }
4785
4786         // note: the protocol does not allow direct umode +o except
4787         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4788         // locally.
4789         virtual void OnOper(userrec* user, const std::string &opertype)
4790         {
4791                 if (IS_LOCAL(user))
4792                 {
4793                         std::deque<std::string> params;
4794                         params.push_back(opertype);
4795                         DoOneToMany(user->nick,"OPERTYPE",params);
4796                 }
4797         }
4798
4799         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4800         {
4801                 if (IS_LOCAL(source))
4802                 {
4803                         char type[8];
4804                         snprintf(type,8,"%cLINE",linetype);
4805                         std::string stype = type;
4806                         if (adding)
4807                         {
4808                                 char sduration[MAXBUF];
4809                                 snprintf(sduration,MAXBUF,"%ld",duration);
4810                                 std::deque<std::string> params;
4811                                 params.push_back(host);
4812                                 params.push_back(sduration);
4813                                 params.push_back(":"+reason);
4814                                 DoOneToMany(source->nick,stype,params);
4815                         }
4816                         else
4817                         {
4818                                 std::deque<std::string> params;
4819                                 params.push_back(host);
4820                                 DoOneToMany(source->nick,stype,params);
4821                         }
4822                 }
4823         }
4824
4825         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4826         {
4827                 OnLine(source,hostmask,true,'G',duration,reason);
4828         }
4829
4830         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4831         {
4832                 OnLine(source,ipmask,true,'Z',duration,reason);
4833         }
4834
4835         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4836         {
4837                 OnLine(source,nickmask,true,'Q',duration,reason);
4838         }
4839
4840         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4841         {
4842                 OnLine(source,hostmask,true,'E',duration,reason);
4843         }
4844
4845         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4846         {
4847                 OnLine(source,hostmask,false,'G',0,"");
4848         }
4849
4850         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4851         {
4852                 OnLine(source,ipmask,false,'Z',0,"");
4853         }
4854
4855         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4856         {
4857                 OnLine(source,nickmask,false,'Q',0,"");
4858         }
4859
4860         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4861         {
4862                 OnLine(source,hostmask,false,'E',0,"");
4863         }
4864
4865         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4866         {
4867                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4868                 {
4869                         if (target_type == TYPE_USER)
4870                         {
4871                                 userrec* u = (userrec*)dest;
4872                                 std::deque<std::string> params;
4873                                 params.push_back(u->nick);
4874                                 params.push_back(text);
4875                                 DoOneToMany(user->nick,"MODE",params);
4876                         }
4877                         else
4878                         {
4879                                 chanrec* c = (chanrec*)dest;
4880                                 std::deque<std::string> params;
4881                                 params.push_back(c->name);
4882                                 params.push_back(text);
4883                                 DoOneToMany(user->nick,"MODE",params);
4884                         }
4885                 }
4886         }
4887
4888         virtual void OnSetAway(userrec* user)
4889         {
4890                 if (IS_LOCAL(user))
4891                 {
4892                         std::deque<std::string> params;
4893                         params.push_back(":"+std::string(user->awaymsg));
4894                         DoOneToMany(user->nick,"AWAY",params);
4895                 }
4896         }
4897
4898         virtual void OnCancelAway(userrec* user)
4899         {
4900                 if (IS_LOCAL(user))
4901                 {
4902                         std::deque<std::string> params;
4903                         params.clear();
4904                         DoOneToMany(user->nick,"AWAY",params);
4905                 }
4906         }
4907
4908         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4909         {
4910                 TreeSocket* s = (TreeSocket*)opaque;
4911                 if (target)
4912                 {
4913                         if (target_type == TYPE_USER)
4914                         {
4915                                 userrec* u = (userrec*)target;
4916                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4917                         }
4918                         else
4919                         {
4920                                 chanrec* c = (chanrec*)target;
4921                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4922                         }
4923                 }
4924         }
4925
4926         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4927         {
4928                 TreeSocket* s = (TreeSocket*)opaque;
4929                 if (target)
4930                 {
4931                         if (target_type == TYPE_USER)
4932                         {
4933                                 userrec* u = (userrec*)target;
4934                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4935                         }
4936                         else if (target_type == TYPE_OTHER)
4937                         {
4938                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4939                         }
4940                         else if (target_type == TYPE_CHANNEL)
4941                         {
4942                                 chanrec* c = (chanrec*)target;
4943                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4944                         }
4945                 }
4946         }
4947
4948         virtual void OnEvent(Event* event)
4949         {
4950                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4951
4952                 if (event->GetEventID() == "send_metadata")
4953                 {
4954                         if (params->size() < 3)
4955                                 return;
4956                         (*params)[2] = ":" + (*params)[2];
4957                         DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4958                 }
4959                 else if (event->GetEventID() == "send_topic")
4960                 {
4961                         if (params->size() < 2)
4962                                 return;
4963                         (*params)[1] = ":" + (*params)[1];
4964                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
4965                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time()));
4966                         DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
4967                 }
4968                 else if (event->GetEventID() == "send_mode")
4969                 {
4970                         if (params->size() < 2)
4971                                 return;
4972                         // Insert the TS value of the object, either userrec or chanrec
4973                         time_t ourTS = 0;
4974                         userrec* a = ServerInstance->FindNick((*params)[0]);
4975                         if (a)
4976                         {
4977                                 ourTS = a->age;
4978                         }
4979                         else
4980                         {
4981                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4982                                 if (a)
4983                                 {
4984                                         ourTS = a->age;
4985                                 }
4986                         }
4987                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4988                         DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4989                 }
4990         }
4991
4992         virtual ~ModuleSpanningTree()
4993         {
4994         }
4995
4996         virtual Version GetVersion()
4997         {
4998                 return Version(1,1,0,2,VF_STATIC|VF_VENDOR,API_VERSION);
4999         }
5000
5001         void Implements(char* List)
5002         {
5003                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
5004                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
5005                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
5006                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
5007                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
5008                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
5009                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
5010         }
5011
5012         /* It is IMPORTANT that m_spanningtree is the last module in the chain
5013          * so that any activity it sees is FINAL, e.g. we arent going to send out
5014          * a NICK message before m_cloaking has finished putting the +x on the user,
5015          * etc etc.
5016          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
5017          * the module call queue.
5018          */
5019         Priority Prioritize()
5020         {
5021                 return PRIORITY_LAST;
5022         }
5023 };
5024
5025 void DoFailOver(Link* x)
5026 {
5027         TreeProtocolModule->DoFailOver(x);
5028 }
5029
5030 Link* FindLink(const std::string& name)
5031 {
5032         return TreeProtocolModule->FindLink(name);
5033 }
5034
5035 class ModuleSpanningTreeFactory : public ModuleFactory
5036 {
5037  public:
5038         ModuleSpanningTreeFactory()
5039         {
5040         }
5041
5042         ~ModuleSpanningTreeFactory()
5043         {
5044         }
5045
5046         virtual Module * CreateModule(InspIRCd* Me)
5047         {
5048                 TreeProtocolModule = new ModuleSpanningTree(Me);
5049                 return TreeProtocolModule;
5050         }
5051
5052 };
5053
5054
5055 extern "C" void * init_module( void )
5056 {
5057         return new ModuleSpanningTreeFactory;
5058 }