src/modules/m_spanningtree.cpp

   1 /*   +------------------------------------+
   2  *   | Inspire Internet Relay Chat Daemon |
   3  *   +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                     E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* $ModDesc: Povides a spanning tree server link protocol */
  18
  19 using namespace std;
  20
  21 #include "configreader.h"
  22 #include "users.h"
  23 #include "channels.h"
  24 #include "modules.h"
  25 #include "commands/cmd_whois.h"
  26 #include "commands/cmd_stats.h"
  27 #include "socket.h"
  28 #include "inspircd.h"
  29 #include "wildcard.h"
  30 #include "xline.h"
  31 #include "cull_list.h"
  32 #include "aes.h"
  33
  34 #define nspace __gnu_cxx
  35
  36
  37 /** If you make a change which breaks the protocol, increment this.
  38  * If you  completely change the protocol, completely change the number.
  39  */
  40 const long ProtocolVersion = 1101;
  41
  42 /*
  43  * The server list in InspIRCd is maintained as two structures
  44  * which hold the data in different ways. Most of the time, we
  45  * want to very quicky obtain three pieces of information:
  46  *
  47  * (1) The information on a server
  48  * (2) The information on the server we must send data through
  49  *     to actually REACH the server we're after
  50  * (3) Potentially, the child/parent objects of this server
  51  *
  52  * The InspIRCd spanning protocol provides easy access to these
  53  * by storing the data firstly in a recursive structure, where
  54  * each item references its parent item, and a dynamic list
  55  * of child items, and another structure which stores the items
  56  * hashed, linearly. This means that if we want to find a server
  57  * by name quickly, we can look it up in the hash, avoiding
  58  * any O(n) lookups. If however, during a split or sync, we want
  59  * to apply an operation to a server, and any of its child objects
  60  * we can resort to recursion to walk the tree structure.
  61  */
  62
  63 using irc::sockets::MatchCIDR;
  64
  65 class ModuleSpanningTree;
  66 static ModuleSpanningTree* TreeProtocolModule;
  67 static InspIRCd* ServerInstance;
  68
  69 /** Any socket can have one of five states at any one time.
  70  * The LISTENER state indicates a socket which is listening
  71  * for connections. It cannot receive data itself, only incoming
  72  * sockets.
  73  * The CONNECTING state indicates an outbound socket which is
  74  * waiting to be writeable.
  75  * The WAIT_AUTH_1 state indicates the socket is outbound and
  76  * has successfully connected, but has not yet sent and received
  77  * SERVER strings.
  78  * The WAIT_AUTH_2 state indicates that the socket is inbound
  79  * (allocated by a LISTENER) but has not yet sent and received
  80  * SERVER strings.
  81  * The CONNECTED state represents a fully authorized, fully
  82  * connected server.
  83  */
  84 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  85
  86 /* Foward declarations */
  87 class TreeServer;
  88 class TreeSocket;
  89
  90 /* This variable represents the root of the server tree
  91  * (for all intents and purposes, it's us)
  92  */
  93 TreeServer *TreeRoot;
  94
  95 /* This hash_map holds the hash equivalent of the server
  96  * tree, used for rapid linear lookups.
  97  */
  98 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
  99 server_hash serverlist;
 100
 101 typedef nspace::hash_map<std::string, userrec*> uid_hash;
 102 typedef nspace::hash_map<std::string, char*> sid_hash;
 103
 104 /* More forward declarations */
 105 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 106 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 107 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 108 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 109 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 110 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 111 void ReadConfiguration(bool rebind);
 112
 113 /* Flatten links and /MAP for non-opers */
 114 bool FlatLinks;
 115 /* Hide U-Lined servers in /MAP and /LINKS */
 116 bool HideULines;
 117
 118 std::vector<std::string> ValidIPs;
 119
 120 class UserManager : public classbase
 121 {
 122         uid_hash uids;
 123         sid_hash sids;
 124  public:
 125         UserManager()
 126         {
 127                 uids.clear();
 128                 sids.clear();
 129         }
 130
 131         std::string UserToUID(userrec* user)
 132         {
 133                 return "";
 134         }
 135
 136         std::string UIDToUser(const std::string &UID)
 137         {
 138                 return "";
 139         }
 140
 141         std::string CreateAndAdd(userrec* user)
 142         {
 143                 return "";
 144         }
 145
 146         std::string CreateAndAdd(const std::string &servername)
 147         {
 148                 return "";
 149         }
 150
 151         std::string ServerToSID(const std::string &servername)
 152         {
 153                 return "";
 154         }
 155
 156         std::string SIDToServer(const std::string &SID)
 157         {
 158                 return "";
 159         }
 160
 161         userrec* FindByID(const std::string &UID)
 162         {
 163                 return NULL;
 164         }
 165 };
 166
 167
 168 /** Each server in the tree is represented by one class of
 169  * type TreeServer. A locally connected TreeServer can
 170  * have a class of type TreeSocket associated with it, for
 171  * remote servers, the TreeSocket entry will be NULL.
 172  * Each server also maintains a pointer to its parent
 173  * (NULL if this server is ours, at the top of the tree)
 174  * and a pointer to its "Route" (see the comments in the
 175  * constructors below), and also a dynamic list of pointers
 176  * to its children which can be iterated recursively
 177  * if required. Creating or deleting objects of type
 178  i* TreeServer automatically maintains the hash_map of
 179  * TreeServer items, deleting and inserting them as they
 180  * are created and destroyed.
 181  */
 182 class TreeServer : public classbase
 183 {
 184         InspIRCd* ServerInstance;               /* Creator */
 185         TreeServer* Parent;                     /* Parent entry */
 186         TreeServer* Route;                      /* Route entry */
 187         std::vector<TreeServer*> Children;      /* List of child objects */
 188         irc::string ServerName;                 /* Server's name */
 189         std::string ServerDesc;                 /* Server's description */
 190         std::string VersionString;              /* Version string or empty string */
 191         int UserCount;                          /* Not used in this version */
 192         int OperCount;                          /* Not used in this version */
 193         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 194         time_t NextPing;                        /* After this time, the server should be PINGed*/
 195         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 196
 197  public:
 198
 199         /** We don't use this constructor. Its a dummy, and won't cause any insertion
 200          * of the TreeServer into the hash_map. See below for the two we DO use.
 201          */
 202         TreeServer(InspIRCd* Instance) : ServerInstance(Instance)
 203         {
 204                 Parent = NULL;
 205                 ServerName = "";
 206                 ServerDesc = "";
 207                 VersionString = "";
 208                 UserCount = OperCount = 0;
 209                 VersionString = ServerInstance->GetVersionString();
 210         }
 211
 212         /** We use this constructor only to create the 'root' item, TreeRoot, which
 213          * represents our own server. Therefore, it has no route, no parent, and
 214          * no socket associated with it. Its version string is our own local version.
 215          */
 216         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc)
 217         {
 218                 Parent = NULL;
 219                 VersionString = "";
 220                 UserCount = OperCount = 0;
 221                 VersionString = ServerInstance->GetVersionString();
 222                 Route = NULL;
 223                 Socket = NULL; /* Fix by brain */
 224                 AddHashEntry();
 225         }
 226
 227         /** When we create a new server, we call this constructor to initialize it.
 228          * This constructor initializes the server's Route and Parent, and sets up
 229          * its ping counters so that it will be pinged one minute from now.
 230          */
 231         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 232                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 233         {
 234                 VersionString = "";
 235                 UserCount = OperCount = 0;
 236                 this->SetNextPingTime(time(NULL) + 60);
 237                 this->SetPingFlag();
 238
 239                 /* find the 'route' for this server (e.g. the one directly connected
 240                  * to the local server, which we can use to reach it)
 241                  *
 242                  * In the following example, consider we have just added a TreeServer
 243                  * class for server G on our network, of which we are server A.
 244                  * To route traffic to G (marked with a *) we must send the data to
 245                  * B (marked with a +) so this algorithm initializes the 'Route'
 246                  * value to point at whichever server traffic must be routed through
 247                  * to get here. If we were to try this algorithm with server B,
 248                  * the Route pointer would point at its own object ('this').
 249                  *
 250                  *              A
 251                  *             / \
 252                  *          + B   C
 253                  *           / \   \
 254                  *          D   E   F
 255                  *         /         \
 256                  *      * G           H
 257                  *
 258                  * We only run this algorithm when a server is created, as
 259                  * the routes remain constant while ever the server exists, and
 260                  * do not need to be re-calculated.
 261                  */
 262
 263                 Route = Above;
 264                 if (Route == TreeRoot)
 265                 {
 266                         Route = this;
 267                 }
 268                 else
 269                 {
 270                         while (this->Route->GetParent() != TreeRoot)
 271                         {
 272                                 this->Route = Route->GetParent();
 273                         }
 274                 }
 275
 276                 /* Because recursive code is slow and takes a lot of resources,
 277                  * we store two representations of the server tree. The first
 278                  * is a recursive structure where each server references its
 279                  * children and its parent, which is used for netbursts and
 280                  * netsplits to dump the whole dataset to the other server,
 281                  * and the second is used for very fast lookups when routing
 282                  * messages and is instead a hash_map, where each item can
 283                  * be referenced by its server name. The AddHashEntry()
 284                  * call below automatically inserts each TreeServer class
 285                  * into the hash_map as it is created. There is a similar
 286                  * maintainance call in the destructor to tidy up deleted
 287                  * servers.
 288                  */
 289
 290                 this->AddHashEntry();
 291         }
 292
 293         int QuitUsers(const std::string &reason)
 294         {
 295                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 296                 const char* reason_s = reason.c_str();
 297                 std::vector<userrec*> time_to_die;
 298                 for (user_hash::iterator n = ServerInstance->clientlist.begin(); n != ServerInstance->clientlist.end(); n++)
 299                 {
 300                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 301                         {
 302                                 time_to_die.push_back(n->second);
 303                         }
 304                 }
 305                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 306                 {
 307                         userrec* a = (userrec*)*n;
 308                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 309                         if (!IS_LOCAL(a))
 310                                 userrec::QuitUser(ServerInstance,a,reason_s);
 311                 }
 312                 return time_to_die.size();
 313         }
 314
 315         /** This method is used to add the structure to the
 316          * hash_map for linear searches. It is only called
 317          * by the constructors.
 318          */
 319         void AddHashEntry()
 320         {
 321                 server_hash::iterator iter;
 322                 iter = serverlist.find(this->ServerName.c_str());
 323                 if (iter == serverlist.end())
 324                         serverlist[this->ServerName.c_str()] = this;
 325         }
 326
 327         /** This method removes the reference to this object
 328          * from the hash_map which is used for linear searches.
 329          * It is only called by the default destructor.
 330          */
 331         void DelHashEntry()
 332         {
 333                 server_hash::iterator iter;
 334                 iter = serverlist.find(this->ServerName.c_str());
 335                 if (iter != serverlist.end())
 336                         serverlist.erase(iter);
 337         }
 338
 339         /** These accessors etc should be pretty self-
 340          * explanitory.
 341          */
 342         TreeServer* GetRoute()
 343         {
 344                 return Route;
 345         }
 346
 347         std::string GetName()
 348         {
 349                 return ServerName.c_str();
 350         }
 351
 352         std::string GetDesc()
 353         {
 354                 return ServerDesc;
 355         }
 356
 357         std::string GetVersion()
 358         {
 359                 return VersionString;
 360         }
 361
 362         void SetNextPingTime(time_t t)
 363         {
 364                 this->NextPing = t;
 365                 LastPingWasGood = false;
 366         }
 367
 368         time_t NextPingTime()
 369         {
 370                 return NextPing;
 371         }
 372
 373         bool AnsweredLastPing()
 374         {
 375                 return LastPingWasGood;
 376         }
 377
 378         void SetPingFlag()
 379         {
 380                 LastPingWasGood = true;
 381         }
 382
 383         int GetUserCount()
 384         {
 385                 return UserCount;
 386         }
 387
 388         void AddUserCount()
 389         {
 390                 UserCount++;
 391         }
 392
 393         void DelUserCount()
 394         {
 395                 UserCount--;
 396         }
 397
 398         int GetOperCount()
 399         {
 400                 return OperCount;
 401         }
 402
 403         TreeSocket* GetSocket()
 404         {
 405                 return Socket;
 406         }
 407
 408         TreeServer* GetParent()
 409         {
 410                 return Parent;
 411         }
 412
 413         void SetVersion(std::string Version)
 414         {
 415                 VersionString = Version;
 416         }
 417
 418         unsigned int ChildCount()
 419         {
 420                 return Children.size();
 421         }
 422
 423         TreeServer* GetChild(unsigned int n)
 424         {
 425                 if (n < Children.size())
 426                 {
 427                         /* Make sure they  cant request
 428                          * an out-of-range object. After
 429                          * all we know what these programmer
 430                          * types are like *grin*.
 431                          */
 432                         return Children[n];
 433                 }
 434                 else
 435                 {
 436                         return NULL;
 437                 }
 438         }
 439
 440         void AddChild(TreeServer* Child)
 441         {
 442                 Children.push_back(Child);
 443         }
 444
 445         bool DelChild(TreeServer* Child)
 446         {
 447                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 448                 {
 449                         if (*a == Child)
 450                         {
 451                                 Children.erase(a);
 452                                 return true;
 453                         }
 454                 }
 455                 return false;
 456         }
 457
 458         /** Removes child nodes of this node, and of that node, etc etc.
 459          * This is used during netsplits to automatically tidy up the
 460          * server tree. It is slow, we don't use it for much else.
 461          */
 462         bool Tidy()
 463         {
 464                 bool stillchildren = true;
 465                 while (stillchildren)
 466                 {
 467                         stillchildren = false;
 468                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 469                         {
 470                                 TreeServer* s = (TreeServer*)*a;
 471                                 s->Tidy();
 472                                 Children.erase(a);
 473                                 DELETE(s);
 474                                 stillchildren = true;
 475                                 break;
 476                         }
 477                 }
 478                 return true;
 479         }
 480
 481         ~TreeServer()
 482         {
 483                 /* We'd better tidy up after ourselves, eh? */
 484                 this->DelHashEntry();
 485         }
 486 };
 487
 488 /** The Link class might as well be a struct,
 489  * but this is C++ and we don't believe in structs (!).
 490  * It holds the entire information of one <link>
 491  * tag from the main config file. We maintain a list
 492  * of them, and populate the list on rehash/load.
 493  */
 494 class Link : public classbase
 495 {
 496  public:
 497         irc::string Name;
 498         std::string IPAddr;
 499         int Port;
 500         std::string SendPass;
 501         std::string RecvPass;
 502         unsigned long AutoConnect;
 503         time_t NextConnectTime;
 504         std::string EncryptionKey;
 505         bool HiddenFromStats;
 506         irc::string FailOver;
 507 };
 508
 509 void DoFailOver(Link* x);
 510 Link* FindLink(const std::string& name);
 511
 512 /* The usual stuff for inspircd modules,
 513  * plus the vector of Link classes which we
 514  * use to store the <link> tags from the config
 515  * file.
 516  */
 517 ConfigReader *Conf;
 518 std::vector<Link> LinkBlocks;
 519
 520 /** Yay for fast searches!
 521  * This is hundreds of times faster than recursion
 522  * or even scanning a linked list, especially when
 523  * there are more than a few servers to deal with.
 524  * (read as: lots).
 525  */
 526 TreeServer* FindServer(std::string ServerName)
 527 {
 528         server_hash::iterator iter;
 529         iter = serverlist.find(ServerName.c_str());
 530         if (iter != serverlist.end())
 531         {
 532                 return iter->second;
 533         }
 534         else
 535         {
 536                 return NULL;
 537         }
 538 }
 539
 540 /** Returns the locally connected server we must route a
 541  * message through to reach server 'ServerName'. This
 542  * only applies to one-to-one and not one-to-many routing.
 543  * See the comments for the constructor of TreeServer
 544  * for more details.
 545  */
 546 TreeServer* BestRouteTo(std::string ServerName)
 547 {
 548         if (ServerName.c_str() == TreeRoot->GetName())
 549                 return NULL;
 550         TreeServer* Found = FindServer(ServerName);
 551         if (Found)
 552         {
 553                 return Found->GetRoute();
 554         }
 555         else
 556         {
 557                 return NULL;
 558         }
 559 }
 560
 561 /** Find the first server matching a given glob mask.
 562  * Theres no find-using-glob method of hash_map [awwww :-(]
 563  * so instead, we iterate over the list using an iterator
 564  * and match each one until we get a hit. Yes its slow,
 565  * deal with it.
 566  */
 567 TreeServer* FindServerMask(std::string ServerName)
 568 {
 569         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 570         {
 571                 if (match(i->first.c_str(),ServerName.c_str()))
 572                         return i->second;
 573         }
 574         return NULL;
 575 }
 576
 577 /* A convenient wrapper that returns true if a server exists */
 578 bool IsServer(std::string ServerName)
 579 {
 580         return (FindServer(ServerName) != NULL);
 581 }
 582
 583
 584 class cmd_rconnect : public command_t
 585 {
 586         Module* Creator;
 587  public:
 588         cmd_rconnect (InspIRCd* Instance, Module* Callback) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback)
 589         {
 590                 this->source = "m_spanningtree.so";
 591                 syntax = "<remote-server-mask> <servermask>";
 592         }
 593
 594         CmdResult Handle (const char** parameters, int pcnt, userrec *user)
 595         {
 596                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 597                 /* Is this aimed at our server? */
 598                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 599                 {
 600                         /* Yes, initiate the given connect */
 601                         ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 602                         const char* para[1];
 603                         para[0] = parameters[1];
 604                         std::string original_command = std::string("CONNECT ") + parameters[1];
 605                         Creator->OnPreCommand("CONNECT", para, 1, user, true, original_command);
 606
 607                         return CMD_SUCCESS;
 608                 }
 609
 610                 return CMD_FAILURE;
 611         }
 612 };
 613
 614
 615
 616 /** Every SERVER connection inbound or outbound is represented by
 617  * an object of type TreeSocket.
 618  * TreeSockets, being inherited from InspSocket, can be tied into
 619  * the core socket engine, and we cn therefore receive activity events
 620  * for them, just like activex objects on speed. (yes really, that
 621  * is a technical term!) Each of these which relates to a locally
 622  * connected server is assocated with it, by hooking it onto a
 623  * TreeSocket class using its constructor. In this way, we can
 624  * maintain a list of servers, some of which are directly connected,
 625  * some of which are not.
 626  */
 627 class TreeSocket : public InspSocket
 628 {
 629         std::string myhost;
 630         std::string in_buffer;
 631         ServerState LinkState;
 632         std::string InboundServerName;
 633         std::string InboundDescription;
 634         int num_lost_users;
 635         int num_lost_servers;
 636         time_t NextPing;
 637         bool LastPingWasGood;
 638         bool bursting;
 639         AES* ctx_in;
 640         AES* ctx_out;
 641         unsigned int keylength;
 642         std::string ModuleList;
 643         std::map<std::string,std::string> CapKeys;
 644
 645  public:
 646
 647         /** Because most of the I/O gubbins are encapsulated within
 648          * InspSocket, we just call the superclass constructor for
 649          * most of the action, and append a few of our own values
 650          * to it.
 651          */
 652         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime)
 653                 : InspSocket(SI, host, port, listening, maxtime)
 654         {
 655                 myhost = host;
 656                 this->LinkState = LISTENER;
 657                 this->ctx_in = NULL;
 658                 this->ctx_out = NULL;
 659         }
 660
 661         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 662                 : InspSocket(SI, host, port, listening, maxtime)
 663         {
 664                 myhost = ServerName;
 665                 this->LinkState = CONNECTING;
 666                 this->ctx_in = NULL;
 667                 this->ctx_out = NULL;
 668         }
 669
 670         /** When a listening socket gives us a new file descriptor,
 671          * we must associate it with a socket without creating a new
 672          * connection. This constructor is used for this purpose.
 673          */
 674         TreeSocket(InspIRCd* SI, int newfd, char* ip)
 675                 : InspSocket(SI, newfd, ip)
 676         {
 677                 this->LinkState = WAIT_AUTH_1;
 678                 this->ctx_in = NULL;
 679                 this->ctx_out = NULL;
 680                 this->SendCapabilities();
 681         }
 682
 683         ~TreeSocket()
 684         {
 685                 if (ctx_in)
 686                         DELETE(ctx_in);
 687                 if (ctx_out)
 688                         DELETE(ctx_out);
 689         }
 690
 691         void InitAES(std::string key,std::string SName)
 692         {
 693                 if (key == "")
 694                         return;
 695
 696                 ctx_in = new AES();
 697                 ctx_out = new AES();
 698                 Instance->Log(DEBUG,"Initialized AES key %s",key.c_str());
 699                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 700                 keylength = key.length();
 701                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 702                 {
 703                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 704                         Instance->Log(DEBUG,"Key length not 16, 24 or 32 characters!");
 705                 }
 706                 else
 707                 {
 708                         if (this->GetState() != I_ERROR)
 709                         {
 710                                 this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 711                                 ctx_in->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 712                                         \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 713                                 ctx_out->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 714                                         \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 715                         }
 716                 }
 717         }
 718
 719         /** When an outbound connection finishes connecting, we receive
 720          * this event, and must send our SERVER string to the other
 721          * side. If the other side is happy, as outlined in the server
 722          * to server docs on the inspircd.org site, the other side
 723          * will then send back its own server string.
 724          */
 725         virtual bool OnConnected()
 726         {
 727                 if (this->LinkState == CONNECTING)
 728                 {
 729                         /* we do not need to change state here. */
 730                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 731                         {
 732                                 if (x->Name == this->myhost)
 733                                 {
 734                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
 735                                         this->SendCapabilities();
 736                                         if (x->EncryptionKey != "")
 737                                         {
 738                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 739                                                 {
 740                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 741                                                 }
 742                                                 else
 743                                                 {
 744                                                         this->WriteLine(std::string("AES ")+this->Instance->Config->ServerName);
 745                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 746                                                 }
 747                                         }
 748                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 749                                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 750                                         return true;
 751                                 }
 752                         }
 753                 }
 754                 /* There is a (remote) chance that between the /CONNECT and the connection
 755                  * being accepted, some muppet has removed the <link> block and rehashed.
 756                  * If that happens the connection hangs here until it's closed. Unlikely
 757                  * and rather harmless.
 758                  */
 759                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 760                 return true;
 761         }
 762
 763         virtual void OnError(InspSocketError e)
 764         {
 765                 /* We don't handle this method, because all our
 766                  * dirty work is done in OnClose() (see below)
 767                  * which is still called on error conditions too.
 768                  */
 769                 if (e == I_ERR_CONNECT)
 770                 {
 771                         this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
 772                         Link* MyLink = FindLink(myhost);
 773                         if (MyLink)
 774                                 DoFailOver(MyLink);
 775                 }
 776         }
 777
 778         virtual int OnDisconnect()
 779         {
 780                 /* For the same reason as above, we don't
 781                  * handle OnDisconnect()
 782                  */
 783                 return true;
 784         }
 785
 786         /** Recursively send the server tree with distances as hops.
 787          * This is used during network burst to inform the other server
 788          * (and any of ITS servers too) of what servers we know about.
 789          * If at any point any of these servers already exist on the other
 790          * end, our connection may be terminated. The hopcounts given
 791          * by this function are relative, this doesn't matter so long as
 792          * they are all >1, as all the remote servers re-calculate them
 793          * to be relative too, with themselves as hop 0.
 794          */
 795         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 796         {
 797                 char command[1024];
 798                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 799                 {
 800                         TreeServer* recursive_server = Current->GetChild(q);
 801                         if (recursive_server != s)
 802                         {
 803                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 804                                 this->WriteLine(command);
 805                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 806                                 /* down to next level */
 807                                 this->SendServers(recursive_server, s, hops+1);
 808                         }
 809                 }
 810         }
 811
 812         std::string MyCapabilities()
 813         {
 814                 std::vector<std::string> modlist;
 815                 std::string capabilities = "";
 816
 817                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 818                 {
 819                         if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
 820                                 modlist.push_back(this->Instance->Config->module_names[i]);
 821                 }
 822                 sort(modlist.begin(),modlist.end());
 823                 for (unsigned int i = 0; i < modlist.size(); i++)
 824                 {
 825                         if (i)
 826                                 capabilities = capabilities + ",";
 827                         capabilities = capabilities + modlist[i];
 828                 }
 829                 return capabilities;
 830         }
 831
 832         void SendCapabilities()
 833         {
 834                 irc::commasepstream modulelist(MyCapabilities());
 835
 836                 this->WriteLine("CAPAB START");
 837
 838                 /* Send module names, split at 509 length */
 839                 std::string item = "*";
 840                 std::string line = "CAPAB MODULES ";
 841                 while ((item = modulelist.GetToken()) != "")
 842                 {
 843                         if (line.length() + item.length() + 1 > 509)
 844                         {
 845                                 this->WriteLine(line);
 846                                 line = "CAPAB MODULES ";
 847                         }
 848
 849                         if (line != "CAPAB MODULES ")
 850                                 line.append(",");
 851
 852                         line.append(item);
 853                 }
 854                 if (line != "CAPAB MODULES ")
 855                         this->WriteLine(line);
 856
 857                 int ip6 = 0;
 858                 int ip6support = 0;
 859 #ifdef IPV6
 860                 ip6 = 1;
 861 #endif
 862 #ifdef SUPPORT_IP6LINKS
 863                 ip6support = 1;
 864 #endif
 865                 this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support)+" PROTOCOL="+ConvToStr(ProtocolVersion));
 866
 867                 this->WriteLine("CAPAB END");
 868         }
 869
 870         /* Check a comma seperated list for an item */
 871         bool HasItem(const std::string &list, const std::string &item)
 872         {
 873                 irc::commasepstream seplist(list);
 874
 875                 std::string item2 = "*";
 876                 while ((item2 = seplist.GetToken()) != "")
 877                 {
 878                         if (item2 == item)
 879                                 return true;
 880                 }
 881
 882                 return false;
 883         }
 884
 885         /* Isolate and return the elements that are different between two comma seperated lists */
 886         std::string ListDifference(const std::string &one, const std::string &two)
 887         {
 888                 irc::commasepstream list_one(one);
 889                 std::string item = "*";
 890                 std::string result = "";
 891                 while ((item = list_one.GetToken()) != "")
 892                 {
 893                         if (!HasItem(two, item))
 894                         {
 895                                 result.append(" ");
 896                                 result.append(item);
 897                         }
 898                 }
 899                 return result;
 900         }
 901
 902         bool Capab(std::deque<std::string> params)
 903         {
 904                 if (params.size() < 1)
 905                 {
 906                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 907                         return false;
 908                 }
 909
 910                 if (params[0] == "START")
 911                 {
 912                         this->ModuleList = "";
 913                         this->CapKeys.clear();
 914                 }
 915                 else if (params[0] == "END")
 916                 {
 917                         std::string reason = "";
 918                         int ip6support = 0;
 919 #ifdef SUPPORT_IP6LINKS
 920                         ip6support = 1;
 921 #endif
 922                         /* Compare ModuleList and check CapKeys...
 923                          * Maybe this could be tidier? -- Brain
 924                          */
 925                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 926                         {
 927                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 928                                 if (!diff.length())
 929                                 {
 930                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 931                                 }
 932                                 else
 933                                 {
 934                                         diff = "this server:" + diff;
 935                                 }
 936                                 if (diff.length() == 12)
 937                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 938                                 else
 939                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 940                         }
 941
 942                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 943                                 reason = "We don't both support linking to IPV6 servers";
 944
 945                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 946                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 947
 948                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 949                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 950
 951                         if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
 952                         {
 953                                 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
 954                                 {
 955                                         reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
 956                                 }
 957                                 else
 958                                 {
 959                                         reason = "Protocol version not specified";
 960                                 }
 961                         }
 962
 963                         if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
 964                                 reason = "We don't both have halfop support enabled/disabled identically";
 965
 966                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 967                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 968
 969                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 970                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 971
 972                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 973                                 reason = "Maximum modes per line differ or remote modes per line not specified";
 974
 975                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 976                                 reason = "Maximum quit lengths differ or remote quit length not specified";
 977
 978                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 979                                 reason = "Maximum topic lengths differ or remote topic length not specified";
 980
 981                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
 982                                 reason = "Maximum kick lengths differ or remote kick length not specified";
 983
 984                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
 985                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
 986
 987                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
 988                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
 989
 990                         if (reason.length())
 991                         {
 992                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
 993                                 return false;
 994                         }
 995                 }
 996                 else if ((params[0] == "MODULES") && (params.size() == 2))
 997                 {
 998                         if (!this->ModuleList.length())
 999                         {
1000                                 this->ModuleList.append(params[1]);
1001                         }
1002                         else
1003                         {
1004                                 this->ModuleList.append(",");
1005                                 this->ModuleList.append(params[1]);
1006                         }
1007                 }
1008                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
1009                 {
1010                         irc::tokenstream capabs(params[1]);
1011                         std::string item = "*";
1012                         while ((item = capabs.GetToken()) != "")
1013                         {
1014                                 /* Process each key/value pair */
1015                                 std::string::size_type equals = item.rfind('=');
1016                                 if (equals != std::string::npos)
1017                                 {
1018                                         std::string var = item.substr(0, equals);
1019                                         std::string value = item.substr(equals+1, item.length());
1020                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1021                                         CapKeys[var] = value;
1022                                 }
1023                         }
1024                 }
1025
1026                 return true;
1027         }
1028
1029         /** This function forces this server to quit, removing this server
1030          * and any users on it (and servers and users below that, etc etc).
1031          * It's very slow and pretty clunky, but luckily unless your network
1032          * is having a REAL bad hair day, this function shouldnt be called
1033          * too many times a month ;-)
1034          */
1035         void SquitServer(std::string &from, TreeServer* Current)
1036         {
1037                 /* recursively squit the servers attached to 'Current'.
1038                  * We're going backwards so we don't remove users
1039                  * while we still need them ;)
1040                  */
1041                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1042                 {
1043                         TreeServer* recursive_server = Current->GetChild(q);
1044                         this->SquitServer(from,recursive_server);
1045                 }
1046                 /* Now we've whacked the kids, whack self */
1047                 num_lost_servers++;
1048                 num_lost_users += Current->QuitUsers(from);
1049         }
1050
1051         /** This is a wrapper function for SquitServer above, which
1052          * does some validation first and passes on the SQUIT to all
1053          * other remaining servers.
1054          */
1055         void Squit(TreeServer* Current,std::string reason)
1056         {
1057                 if ((Current) && (Current != TreeRoot))
1058                 {
1059                         std::deque<std::string> params;
1060                         params.push_back(Current->GetName());
1061                         params.push_back(":"+reason);
1062                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1063                         if (Current->GetParent() == TreeRoot)
1064                         {
1065                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1066                         }
1067                         else
1068                         {
1069                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1070                         }
1071                         num_lost_servers = 0;
1072                         num_lost_users = 0;
1073                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1074                         SquitServer(from, Current);
1075                         Current->Tidy();
1076                         Current->GetParent()->DelChild(Current);
1077                         DELETE(Current);
1078                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1079                 }
1080                 else
1081                 {
1082                         Instance->Log(DEFAULT,"Squit from unknown server");
1083                 }
1084         }
1085
1086         /** FMODE command - server mode with timestamp checks */
1087         bool ForceMode(std::string source, std::deque<std::string> &params)
1088         {
1089                 /* Chances are this is a 1.0 FMODE without TS */
1090                 if (params.size() < 3)
1091                 {
1092                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
1093                         return false;
1094                 }
1095
1096                 bool smode = false;
1097                 std::string sourceserv;
1098
1099                 /* Are we dealing with an FMODE from a user, or from a server? */
1100                 userrec* who = this->Instance->FindNick(source);
1101                 if (who)
1102                 {
1103                         /* FMODE from a user, set sourceserv to the users server name */
1104                         sourceserv = who->server;
1105                 }
1106                 else
1107                 {
1108                         /* FMODE from a server, create a fake user to receive mode feedback */
1109                         who = new userrec(this->Instance);
1110                         who->SetFd(FD_MAGIC_NUMBER);
1111                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1112                         sourceserv = source;    /* Set sourceserv to the actual source string */
1113                 }
1114                 const char* modelist[64];
1115                 time_t TS = 0;
1116                 int n = 0;
1117                 memset(&modelist,0,sizeof(modelist));
1118                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1119                 {
1120                         if (q == 1)
1121                         {
1122                                 /* The timestamp is in this position.
1123                                  * We don't want to pass that up to the
1124                                  * server->client protocol!
1125                                  */
1126                                 TS = atoi(params[q].c_str());
1127                         }
1128                         else
1129                         {
1130                                 /* Everything else is fine to append to the modelist */
1131                                 modelist[n++] = params[q].c_str();
1132                         }
1133
1134                 }
1135                 /* Extract the TS value of the object, either userrec or chanrec */
1136                 userrec* dst = this->Instance->FindNick(params[0]);
1137                 chanrec* chan = NULL;
1138                 time_t ourTS = 0;
1139                 if (dst)
1140                 {
1141                         ourTS = dst->age;
1142                 }
1143                 else
1144                 {
1145                         chan = this->Instance->FindChan(params[0]);
1146                         if (chan)
1147                         {
1148                                 ourTS = chan->age;
1149                         }
1150                 }
1151
1152                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1153                  * with parameters.
1154                  */
1155                 if (TS == ourTS)
1156                 {
1157                         Instance->Log(DEBUG,"Entering TS equality check");
1158                         ModeHandler* mh = NULL;
1159                         unsigned long paramptr = 3;
1160                         std::string to_bounce = "";
1161                         std::string to_keep = "";
1162                         std::vector<std::string> params_to_keep;
1163                         std::string params_to_bounce = "";
1164                         bool adding = true;
1165                         char cur_change = 1;
1166                         char old_change = 0;
1167                         char old_bounce_change = 0;
1168                         /* Merge modes, basically do special stuff to mode with params */
1169                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1170                         {
1171                                 switch (*x)
1172                                 {
1173                                         case '-':
1174                                                 adding = false;
1175                                         break;
1176                                         case '+':
1177                                                 adding = true;
1178                                         break;
1179                                         default:
1180                                                 if (adding)
1181                                                 {
1182                                                         /* We only care about whats being set,
1183                                                          * not whats being unset
1184                                                          */
1185                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1186
1187                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1188                                                         {
1189                                                                 /* We only want to do special things to
1190                                                                  * modes with parameters, we are going to rewrite
1191                                                                  * those parameters
1192                                                                  */
1193                                                                 ModePair ret;
1194                                                                 adding ? cur_change = '+' : cur_change = '-';
1195
1196                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1197
1198                                                                 /* The mode is set here, check which we should keep */
1199                                                                 if (ret.first)
1200                                                                 {
1201                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1202
1203                                                                         if (which_to_keep == true)
1204                                                                         {
1205                                                                                 /* Keep ours, bounce theirs:
1206                                                                                  * Send back ours to them and
1207                                                                                  * drop their mode changs
1208                                                                                  */
1209                                                                                 adding ? cur_change = '+' : cur_change = '-';
1210                                                                                 if (cur_change != old_bounce_change)
1211                                                                                         to_bounce += cur_change;
1212                                                                                 to_bounce += *x;
1213                                                                                 old_bounce_change = cur_change;
1214
1215                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1216                                                                                         params_to_bounce.append(" ").append(ret.second);
1217                                                                         }
1218                                                                         else
1219                                                                         {
1220                                                                                 /* Keep theirs: Accept their mode change,
1221                                                                                  * do nothing else
1222                                                                                  */
1223                                                                                 adding ? cur_change = '+' : cur_change = '-';
1224                                                                                 if (cur_change != old_change)
1225                                                                                         to_keep += cur_change;
1226                                                                                 to_keep += *x;
1227                                                                                 old_change = cur_change;
1228
1229                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1230                                                                                         params_to_keep.push_back(params[paramptr]);
1231                                                                         }
1232                                                                 }
1233                                                                 else
1234                                                                 {
1235                                                                         /* Mode isnt set here, we want it */
1236                                                                         adding ? cur_change = '+' : cur_change = '-';
1237                                                                         if (cur_change != old_change)
1238                                                                                 to_keep += cur_change;
1239                                                                         to_keep += *x;
1240                                                                         old_change = cur_change;
1241
1242                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1243                                                                                 params_to_keep.push_back(params[paramptr]);
1244                                                                 }
1245
1246                                                                 paramptr++;
1247                                                         }
1248                                                         else
1249                                                         {
1250                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1251
1252                                                                 if (mh)
1253                                                                 {
1254                                                                         adding ? cur_change = '+' : cur_change = '-';
1255
1256                                                                         /* Just keep this, safe to merge with no checks
1257                                                                          * it has no parameters
1258                                                                          */
1259
1260                                                                         if (cur_change != old_change)
1261                                                                                 to_keep += cur_change;
1262                                                                         to_keep += *x;
1263                                                                         old_change = cur_change;
1264
1265                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1266                                                                         {
1267                                                                                 Instance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1268                                                                                 params_to_keep.push_back(params[paramptr++]);
1269                                                                         }
1270                                                                 }
1271                                                         }
1272                                                 }
1273                                                 else
1274                                                 {
1275                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1276
1277                                                         if (mh)
1278                                                         {
1279                                                                 /* Taking a mode away */
1280                                                                 adding ? cur_change = '+' : cur_change = '-';
1281
1282                                                                 if (cur_change != old_change)
1283                                                                         to_keep += cur_change;
1284                                                                 to_keep += *x;
1285                                                                 old_change = cur_change;
1286
1287                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1288                                                                         params_to_keep.push_back(params[paramptr++]);
1289                                                         }
1290                                                 }
1291                                         break;
1292                                 }
1293                         }
1294
1295                         if (to_bounce.length())
1296                         {
1297                                 std::deque<std::string> newparams;
1298                                 newparams.push_back(params[0]);
1299                                 newparams.push_back(ConvToStr(ourTS));
1300                                 newparams.push_back(to_bounce+params_to_bounce);
1301                                 Instance->Log(DEBUG,"BOUNCE BACK: %s",(to_bounce+params_to_bounce).c_str());
1302                                 DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1303                         }
1304
1305                         if (to_keep.length())
1306                         {
1307                                 unsigned int n = 2;
1308                                 unsigned int q = 0;
1309                                 modelist[0] = params[0].c_str();
1310                                 modelist[1] = to_keep.c_str();
1311
1312                                 if (params_to_keep.size() > 0)
1313                                 {
1314                                         for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
1315                                         {
1316                                                 Instance->Log(DEBUG,"KEEP Item %d of %d: %s", q, params_to_keep.size(), params_to_keep[q].c_str());
1317                                                 modelist[n++] = params_to_keep[q].c_str();
1318                                         }
1319                                 }
1320
1321                                 if (smode)
1322                                 {
1323                                         Instance->Log(DEBUG,"Send mode");
1324                                         this->Instance->SendMode(modelist, n, who);
1325                                 }
1326                                 else
1327                                 {
1328                                         Instance->Log(DEBUG,"Send mode client");
1329                                         this->Instance->CallCommandHandler("MODE", modelist, n, who);
1330                                 }
1331
1332                                 /* HOT POTATO! PASS IT ON! */
1333                                 DoOneToAllButSender(source,"FMODE",params,sourceserv);
1334                         }
1335                 }
1336                 else
1337                 /* U-lined servers always win regardless of their TS */
1338                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1339                 {
1340                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1341                          * SHOULD accept it, if its clock is right.
1342                          *
1343                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1344                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1345                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1346                          *
1347                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1348                          * writing the code. It took me a while to come up with this solution.
1349                          *
1350                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1351                          */
1352
1353                         std::deque<std::string> newparams;      /* New parameter list we send back */
1354                         newparams.push_back(params[0]);         /* Target, user or channel */
1355                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1356                         newparams.push_back("");                /* This contains the mode string. For now
1357                                                                  * it's empty, we fill it below.
1358                                                                  */
1359
1360                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1361                          * set to avoid a desync here.
1362                          */
1363                         std::string modebounce = "";
1364                         bool adding = true;
1365                         unsigned int t = 3;
1366                         ModeHandler* mh = NULL;
1367                         char cur_change = 1;
1368                         char old_change = 0;
1369                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1370                         {
1371                                 /* Iterate over all mode chars in the sent set */
1372                                 switch (*x)
1373                                 {
1374                                         /* Adding or subtracting modes? */
1375                                         case '-':
1376                                                 adding = false;
1377                                         break;
1378                                         case '+':
1379                                                 adding = true;
1380                                         break;
1381                                         default:
1382                                                 /* Find the mode handler for this mode */
1383                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1384
1385                                                 /* Got a mode handler?
1386                                                  * This also prevents us bouncing modes we have no handler for.
1387                                                  */
1388                                                 if (mh)
1389                                                 {
1390                                                         ModePair ret;
1391                                                         std::string p = "";
1392
1393                                                         /* Does the mode require a parameter right now?
1394                                                          * If it does, fetch it if we can
1395                                                          */
1396                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1397                                                                 p = params[t++];
1398
1399                                                         /* Call the ModeSet method to determine if its set with the
1400                                                          * given parameter here or not.
1401                                                          */
1402                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1403
1404                                                         /* XXX: Really. Dont ask.
1405                                                          * Determine from if its set combined with what the current
1406                                                          * 'state' is (adding or not) as to wether we should 'invert'
1407                                                          * or 'reinforce' the mode change
1408                                                          */
1409                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1410
1411                                                         /* Quickly determine if we have 'flipped' from + to -,
1412                                                          * or - to +, to prevent unneccessary +/- chars in the
1413                                                          * output string that waste bandwidth
1414                                                          */
1415                                                         if (cur_change != old_change)
1416                                                                 modebounce += cur_change;
1417                                                         old_change = cur_change;
1418
1419                                                         /* Add the mode character to the output string */
1420                                                         modebounce += mh->GetModeChar();
1421
1422                                                         /* We got a parameter back from ModeHandler::ModeSet,
1423                                                          * are we supposed to be sending one out right now?
1424                                                          */
1425                                                         if (ret.second.length())
1426                                                         {
1427                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1428                                                                         /* Yes we're supposed to be sending out
1429                                                                          * the parameter. Make sure it goes
1430                                                                          */
1431                                                                         newparams.push_back(ret.second);
1432                                                         }
1433
1434                                                 }
1435                                         break;
1436                                 }
1437                         }
1438
1439                         /* Update the parameters for FMODE with the new 'bounced' string */
1440                         newparams[2] = modebounce;
1441                         /* Only send it back the way it came, no need to send it anywhere else */
1442                         DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1443                         Instance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1444                 }
1445                 else
1446                 {
1447                         Instance->Log(DEBUG,"Allow modes, TS lower for sender");
1448                         /* The server was ulined, but something iffy is up with the TS.
1449                          * Sound the alarm bells!
1450                          */
1451                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1452                         {
1453                                 this->Instance->WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",sourceserv.c_str(),params[0].c_str());
1454                         }
1455                         /* Allow the mode, route it to either server or user command handling */
1456                         if (smode)
1457                                 this->Instance->SendMode(modelist,n,who);
1458                         else
1459                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1460
1461                         /* HOT POTATO! PASS IT ON! */
1462                         DoOneToAllButSender(source,"FMODE",params,sourceserv);
1463                 }
1464                 /* Are we supposed to free the userrec? */
1465                 if (smode)
1466                         DELETE(who);
1467
1468                 return true;
1469         }
1470
1471         /** FTOPIC command */
1472         bool ForceTopic(std::string source, std::deque<std::string> &params)
1473         {
1474                 if (params.size() != 4)
1475                         return true;
1476                 time_t ts = atoi(params[1].c_str());
1477                 std::string nsource = source;
1478
1479                 chanrec* c = this->Instance->FindChan(params[0]);
1480                 if (c)
1481                 {
1482                         if ((ts >= c->topicset) || (!*c->topic))
1483                         {
1484                                 std::string oldtopic = c->topic;
1485                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1486                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1487                                 c->topicset = ts;
1488                                 /* if the topic text is the same as the current topic,
1489                                  * dont bother to send the TOPIC command out, just silently
1490                                  * update the set time and set nick.
1491                                  */
1492                                 if (oldtopic != params[3])
1493                                 {
1494                                         userrec* user = this->Instance->FindNick(source);
1495                                         if (!user)
1496                                         {
1497                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1498                                         }
1499                                         else
1500                                         {
1501                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1502                                                 nsource = user->server;
1503                                         }
1504                                         /* all done, send it on its way */
1505                                         params[3] = ":" + params[3];
1506                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
1507                                 }
1508                         }
1509
1510                 }
1511
1512                 return true;
1513         }
1514
1515         /** FJOIN, similar to TS6 SJOIN, but not quite. */
1516         bool ForceJoin(std::string source, std::deque<std::string> &params)
1517         {
1518                 /* 1.1 FJOIN works as follows:
1519                  *
1520                  * Each FJOIN is sent along with a timestamp, and the side with the lowest
1521                  * timestamp 'wins'. From this point on we will refer to this side as the
1522                  * winner. The side with the higher timestamp loses, from this point on we
1523                  * will call this side the loser or losing side. This should be familiar to
1524                  * anyone who's dealt with dreamforge or TS6 before.
1525                  *
1526                  * When two sides of a split heal and this occurs, the following things
1527                  * will happen:
1528                  *
1529                  * If the timestamps are exactly equal, both sides merge their privilages
1530                  * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
1531                  * re-created during a split, this is safe to do.
1532                  *
1533                  *
1534                  * If the timestamps are NOT equal, the losing side removes all privilage
1535                  * modes from all of its users that currently exist in the channel, before
1536                  * introducing new users into the channel which are listed in the FJOIN
1537                  * command's parameters. This means, all modes +ohv, and privilages added
1538                  * by modules, such as +qa. The losing side then LOWERS its timestamp value
1539                  * of the channel to match that of the winning side, and the modes of the
1540                  * users of the winning side are merged in with the losing side. The loser
1541                  * then sends out a set of FMODE commands which 'confirm' that it just
1542                  * removed all privilage modes from its existing users, which allows for
1543                  * services packages to still work correctly without needing to know the
1544                  * timestamping rules which InspIRCd follows. In TS6 servers this is always
1545                  * a problem, and services packages must contain code which explicitly
1546                  * behaves as TS6 does, removing ops from the losing side of a split where
1547                  * neccessary within its internal records, as this state information is
1548                  * not explicitly echoed out in that protocol.
1549                  *
1550                  * The winning side on the other hand will ignore all user modes from the
1551                  * losing side, so only its own modes get applied. Life is simple for those
1552                  * who succeed at internets. :-)
1553                  *
1554                  * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
1555                  * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
1556                  * you ask? Well, quite simply because we don't need to. They'll be sent
1557                  * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
1558                  * the losing side sends any modes for the channel which shouldnt win,
1559                  * they wont as their timestamp will be too high :-)
1560                  */
1561
1562                 if (params.size() < 3)
1563                         return true;
1564
1565                 char first[MAXBUF];             /* The first parameter of the mode command */
1566                 char modestring[MAXBUF];        /* The mode sequence (2nd parameter) of the mode command */
1567                 char* mode_users[127];          /* The values used by the mode command */
1568                 memset(&mode_users,0,sizeof(mode_users));       /* Initialize mode parameters */
1569                 mode_users[0] = first;          /* Set this up to be our on-stack value */
1570                 mode_users[1] = modestring;     /* Same here as above */
1571                 strcpy(modestring,"+");         /* Initialize the mode sequence to just '+' */
1572                 unsigned int modectr = 2;       /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */
1573
1574                 userrec* who = NULL;                    /* User we are currently checking */
1575                 std::string channel = params[0];        /* Channel name, as a string */
1576                 time_t TS = atoi(params[1].c_str());    /* Timestamp given to us for remote side */
1577
1578                 /* Try and find the channel */
1579                 chanrec* chan = this->Instance->FindChan(channel);
1580
1581                 /* Initialize channel name in the mode parameters */
1582                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1583
1584                 /* default TS is a high value, which if we dont have this
1585                  * channel will let the other side apply their modes.
1586                  */
1587                 time_t ourTS = time(NULL)+600;
1588
1589                 /* Does this channel exist? if it does, get its REAL timestamp */
1590                 if (chan)
1591                         ourTS = chan->age;
1592
1593                 /* In 1.1, if they have the newer channel, we immediately clear
1594                  * all status modes from our users. We then accept their modes.
1595                  * If WE have the newer channel its the other side's job to do this.
1596                  * Note that this causes the losing server to send out confirming
1597                  * FMODE lines.
1598                  */
1599                 if (ourTS > TS)
1600                 {
1601                         std::deque<std::string> param_list;
1602
1603                         if (chan)
1604                                 chan->age = TS;
1605
1606                         /* XXX: Lower the TS here */
1607                         ourTS = TS;
1608
1609                         param_list.push_back(channel);
1610                         /* Zap all the privilage modes on our side */
1611                         this->RemoveStatus(Instance->Config->ServerName, param_list);
1612                 }
1613
1614                 /* Put the final parameter of the FJOIN into a tokenstream ready to split it */
1615                 irc::tokenstream users(params[2]);
1616                 std::string item = "*";
1617
1618                 /* do this first, so our mode reversals are correctly received by other servers
1619                  * if there is a TS collision.
1620                  */
1621                 params[2] = ":" + params[2];
1622                 DoOneToAllButSender(source,"FJOIN",params,source);
1623
1624                 /* Now, process every 'prefixes,nick' pair */
1625                 while (item != "")
1626                 {
1627                         /* Find next user */
1628                         item = users.GetToken();
1629
1630                         const char* usr = item.c_str();
1631
1632                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1633                          * (is this even possible?) */
1634                         if (usr && *usr)
1635                         {
1636                                 const char* permissions = usr;
1637                                 int ntimes = 0;
1638                                 char* nm = new char[MAXBUF];
1639                                 char* tnm = nm;
1640
1641                                 /* Iterate through all the prefix values, convert them from prefixes
1642                                  * to mode letters, and append them to the mode sequence
1643                                  */
1644                                 while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
1645                                 {
1646                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1647                                         if (mh)
1648                                         {
1649                                                 /* This is a valid prefix */
1650                                                 ntimes++;
1651                                                 *tnm++ = mh->GetModeChar();
1652                                         }
1653                                         else
1654                                         {
1655                                                 /* Not a valid prefix...
1656                                                  * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
1657                                                  */
1658                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
1659                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
1660                                                 return false;
1661                                         }
1662                                         usr++;
1663                                         permissions++;
1664                                 }
1665
1666                                 /* Null terminate modes */
1667                                 *tnm = 0;
1668                                 /* Advance past the comma, to the nick */
1669                                 usr++;
1670
1671                                 /* Check the user actually exists */
1672                                 who = this->Instance->FindNick(usr);
1673                                 if (who)
1674                                 {
1675                                         /* Did they get any modes? How many times? */
1676                                         strlcat(modestring, nm, MAXBUF);
1677                                         for (int k = 0; k < ntimes; k++)
1678                                                 mode_users[modectr++] = strdup(usr);
1679
1680                                         /* Free temporary buffer used for mode sequence */
1681                                         delete[] nm;
1682
1683                                         /* Check that the user's 'direction' is correct
1684                                          * based on the server sending the FJOIN. We must
1685                                          * check each nickname in turn, because the origin of
1686                                          * the FJOIN may be different to the origin of the nicks
1687                                          * in the command itself.
1688                                          */
1689                                         TreeServer* route_back_again = BestRouteTo(who->server);
1690                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
1691                                         {
1692                                                 /* Oh dear oh dear. */
1693                                                 Instance->Log(DEBUG,"Fake direction in FJOIN, user '%s'",who->nick);
1694                                                 continue;
1695                                         }
1696                                         /* Finally, we can actually place the user into the channel.
1697                                          * We're sure its right. Final answer, phone a friend.
1698                                          */
1699                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
1700
1701                                         /* Have we already queued up MAXMODES modes with parameters
1702                                          * (+qaohv) ready to be sent to the server?
1703                                          */
1704                                         if (modectr >= (MAXMODES-1))
1705                                         {
1706                                                 /* Only actually give the users any status if we lost
1707                                                  * the FJOIN or drew (equal timestamps).
1708                                                  * It isn't actually possible for ourTS to be > TS here,
1709                                                  * only possible to actually have ourTS == TS, or
1710                                                  * ourTS < TS, because if we lost, we already lowered
1711                                                  * our TS above before we entered this loop. We only
1712                                                  * check >= as a safety measure, in case someone stuffed
1713                                                  * up. If someone DID stuff up, it was most likely me.
1714                                                  * Note: I do not like baseball bats in the face...
1715                                                  */
1716                                                 if (ourTS >= TS)
1717                                                 {
1718                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1719                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1720
1721                                                         /* Something stuffed up, and for some reason, the timestamp is
1722                                                          * NOT lowered right now and should be. Lower it. Usually this
1723                                                          * code won't be executed, doubtless someone will remove it some
1724                                                          * day soon.
1725                                                          */
1726                                                         if (ourTS > TS)
1727                                                         {
1728                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1729                                                                 chan->age = TS;
1730                                                                 ourTS = TS;
1731                                                         }
1732                                                 }
1733
1734                                                 /* Reset all this back to defaults, and
1735                                                  * free any ram we have left allocated.
1736                                                  */
1737                                                 strcpy(mode_users[1],"+");
1738                                                 for (unsigned int f = 2; f < modectr; f++)
1739                                                         free(mode_users[f]);
1740                                                 modectr = 2;
1741                                         }
1742                                 }
1743                                 else
1744                                 {
1745                                         /* Remember to free this */
1746                                         delete[] nm;
1747                                         /* If we got here, there's a nick in FJOIN which doesnt exist on this server.
1748                                          * We don't try to process the nickname here (that WOULD cause a segfault because
1749                                          * we'd be playing with null pointers) however, we DO pass the nickname on, just
1750                                          * in case somehow we're desynched, so that other users which might be able to see
1751                                          * the nickname get their fair chance to process it.
1752                                          */
1753                                         Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
1754                                         continue;
1755                                 }
1756                         }
1757                 }
1758
1759                 /* there werent enough modes built up to flush it during FJOIN,
1760                  * or, there are a number left over. flush them out.
1761                  */
1762                 if ((modectr > 2) && (who) && (chan))
1763                 {
1764                         if (ourTS >= TS)
1765                         {
1766                                 /* Our channel is newer than theirs. Evil deeds must be afoot. */
1767                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1768                                 /* Yet again, we can't actually get a true value here, if everything else
1769                                  * is working as it should.
1770                                  */
1771                                 if (ourTS > TS)
1772                                 {
1773                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1774                                         chan->age = TS;
1775                                         ourTS = TS;
1776                                 }
1777                         }
1778
1779                         /* Free anything we have left to free */
1780                         for (unsigned int f = 2; f < modectr; f++)
1781                                 free(mode_users[f]);
1782                 }
1783
1784                 /* All done. That wasnt so bad was it, you can wipe
1785                  * the sweat from your forehead now. :-)
1786                  */
1787                 return true;
1788         }
1789
1790         /** NICK command */
1791         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1792         {
1793                 if (params.size() < 8)
1794                         return true;
1795                 if (params.size() > 8)
1796                 {
1797                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1798                         return true;
1799                 }
1800                 // NICK age nick host dhost ident +modes ip :gecos
1801                 //       0    1   2     3     4      5   6     7
1802                 time_t age = atoi(params[0].c_str());
1803
1804                 /* This used to have a pretty craq'y loop doing the same thing,
1805                  * now we just let the STL do the hard work (more efficiently)
1806                  */
1807                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1808                 if (pos_after_plus != std::string::npos)
1809                         params[5] = params[5].substr(pos_after_plus);
1810
1811                 const char* tempnick = params[1].c_str();
1812                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1813
1814                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1815
1816                 if (iter != this->Instance->clientlist.end())
1817                 {
1818                         // nick collision
1819                         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);
1820                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1821                         userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
1822                         return true;
1823                 }
1824
1825                 userrec* _new = new userrec(this->Instance);
1826                 this->Instance->clientlist[tempnick] = _new;
1827                 _new->SetFd(FD_MAGIC_NUMBER);
1828                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1829                 strlcpy(_new->host, params[2].c_str(),63);
1830                 strlcpy(_new->dhost, params[3].c_str(),63);
1831                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1832                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1833                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1834                 _new->registered = REG_ALL;
1835                 _new->signon = age;
1836
1837                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1838                         _new->modes[(*v)-65] = 1;
1839
1840 #ifdef SUPPORT_IP6LINKS
1841                 if (params[6].find_first_of(":") != std::string::npos)
1842                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1843                 else
1844 #endif
1845                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1846
1847                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1848
1849                 params[7] = ":" + params[7];
1850                 DoOneToAllButSender(source,"NICK",params,source);
1851
1852                 // Increment the Source Servers User Count..
1853                 TreeServer* SourceServer = FindServer(source);
1854                 if (SourceServer)
1855                 {
1856                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1857                         SourceServer->AddUserCount();
1858                 }
1859
1860                 FOREACH_MOD(I_OnPostConnect,OnPostConnect(_new));
1861
1862                 return true;
1863         }
1864
1865         /** Send one or more FJOINs for a channel of users.
1866          * If the length of a single line is more than 480-NICKMAX
1867          * in length, it is split over multiple lines.
1868          */
1869         void SendFJoins(TreeServer* Current, chanrec* c)
1870         {
1871                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1872                 char list[MAXBUF];
1873                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1874
1875                 size_t dlen, curlen;
1876                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1877                 int numusers = 0;
1878                 char* ptr = list + dlen;
1879
1880                 CUList *ulist = c->GetUsers();
1881                 std::vector<userrec*> specific_halfop;
1882                 std::vector<userrec*> specific_voice;
1883                 std::string modes = "";
1884                 std::string params = "";
1885
1886                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1887                 {
1888                         // The first parameter gets a : before it
1889                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1890
1891                         curlen += ptrlen;
1892                         ptr += ptrlen;
1893
1894                         numusers++;
1895
1896                         if (curlen > (480-NICKMAX))
1897                         {
1898                                 this->WriteLine(list);
1899                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1900                                 ptr = list + dlen;
1901                                 ptrlen = 0;
1902                                 numusers = 0;
1903                         }
1904                 }
1905
1906                 if (numusers)
1907                         this->WriteLine(list);
1908
1909                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1910                 {
1911                         modes.append("b");
1912                         params.append(b->data).append(" ");
1913                 }
1914                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1915         }
1916
1917         /** Send G, Q, Z and E lines */
1918         void SendXLines(TreeServer* Current)
1919         {
1920                 char data[MAXBUF];
1921                 std::string n = this->Instance->Config->ServerName;
1922                 const char* sn = n.c_str();
1923                 int iterations = 0;
1924                 /* Yes, these arent too nice looking, but they get the job done */
1925                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1926                 {
1927                         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);
1928                         this->WriteLine(data);
1929                 }
1930                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1931                 {
1932                         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);
1933                         this->WriteLine(data);
1934                 }
1935                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1936                 {
1937                         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);
1938                         this->WriteLine(data);
1939                 }
1940                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1941                 {
1942                         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);
1943                         this->WriteLine(data);
1944                 }
1945                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1946                 {
1947                         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);
1948                         this->WriteLine(data);
1949                 }
1950                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1951                 {
1952                         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);
1953                         this->WriteLine(data);
1954                 }
1955                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1956                 {
1957                         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);
1958                         this->WriteLine(data);
1959                 }
1960                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1961                 {
1962                         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);
1963                         this->WriteLine(data);
1964                 }
1965         }
1966
1967         /** Send channel modes and topics */
1968         void SendChannelModes(TreeServer* Current)
1969         {
1970                 char data[MAXBUF];
1971                 std::deque<std::string> list;
1972                 int iterations = 0;
1973                 std::string n = this->Instance->Config->ServerName;
1974                 const char* sn = n.c_str();
1975                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1976                 {
1977                         SendFJoins(Current, c->second);
1978                         if (*c->second->topic)
1979                         {
1980                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1981                                 this->WriteLine(data);
1982                         }
1983                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1984                         list.clear();
1985                         c->second->GetExtList(list);
1986                         for (unsigned int j = 0; j < list.size(); j++)
1987                         {
1988                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1989                         }
1990                 }
1991         }
1992
1993         /** send all users and their oper state/modes */
1994         void SendUsers(TreeServer* Current)
1995         {
1996                 char data[MAXBUF];
1997                 std::deque<std::string> list;
1998                 int iterations = 0;
1999                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
2000                 {
2001                         if (u->second->registered == REG_ALL)
2002                         {
2003                                 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);
2004                                 this->WriteLine(data);
2005                                 if (*u->second->oper)
2006                                 {
2007                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
2008                                 }
2009                                 if (*u->second->awaymsg)
2010                                 {
2011                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
2012                                 }
2013                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
2014                                 list.clear();
2015                                 u->second->GetExtList(list);
2016                                 for (unsigned int j = 0; j < list.size(); j++)
2017                                 {
2018                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
2019                                 }
2020                         }
2021                 }
2022         }
2023
2024         /** This function is called when we want to send a netburst to a local
2025          * server. There is a set order we must do this, because for example
2026          * users require their servers to exist, and channels require their
2027          * users to exist. You get the idea.
2028          */
2029         void DoBurst(TreeServer* s)
2030         {
2031                 std::string burst = "BURST "+ConvToStr(time(NULL));
2032                 std::string endburst = "ENDBURST";
2033                 // Because by the end of the netburst, it  could be gone!
2034                 std::string name = s->GetName();
2035                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
2036                 this->WriteLine(burst);
2037                 /* send our version string */
2038                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
2039                 /* Send server tree */
2040                 this->SendServers(TreeRoot,s,1);
2041                 /* Send users and their oper status */
2042                 this->SendUsers(s);
2043                 /* Send everything else (channel modes, xlines etc) */
2044                 this->SendChannelModes(s);
2045                 this->SendXLines(s);
2046                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
2047                 this->WriteLine(endburst);
2048                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
2049         }
2050
2051         /** This function is called when we receive data from a remote
2052          * server. We buffer the data in a std::string (it doesnt stay
2053          * there for long), reading using InspSocket::Read() which can
2054          * read up to 16 kilobytes in one operation.
2055          *
2056          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
2057          * THE SOCKET OBJECT FOR US.
2058          */
2059         virtual bool OnDataReady()
2060         {
2061                 char* data = this->Read();
2062                 /* Check that the data read is a valid pointer and it has some content */
2063                 if (data && *data)
2064                 {
2065                         this->in_buffer.append(data);
2066                         /* While there is at least one new line in the buffer,
2067                          * do something useful (we hope!) with it.
2068                          */
2069                         while (in_buffer.find("\n") != std::string::npos)
2070                         {
2071                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
2072                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
2073                                 if (ret.find("\r") != std::string::npos)
2074                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
2075                                 /* Process this one, abort if it
2076                                  * didnt return true.
2077                                  */
2078                                 if (this->ctx_in)
2079                                 {
2080                                         char out[1024];
2081                                         char result[1024];
2082                                         memset(result,0,1024);
2083                                         memset(out,0,1024);
2084                                         Instance->Log(DEBUG,"Original string '%s'",ret.c_str());
2085                                         /* ERROR + CAPAB is still allowed unencryped */
2086                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
2087                                         {
2088                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
2089                                                 if ((nbytes > 0) && (nbytes < 1024))
2090                                                 {
2091                                                         Instance->Log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
2092                                                         ctx_in->Decrypt(out, result, nbytes, 0);
2093                                                         for (int t = 0; t < nbytes; t++)
2094                                                                 if (result[t] == '\7') result[t] = 0;
2095                                                         ret = result;
2096                                                 }
2097                                         }
2098                                 }
2099                                 if (!this->ProcessLine(ret))
2100                                 {
2101                                         Instance->Log(DEBUG,"ProcessLine says no!");
2102                                         return false;
2103                                 }
2104                         }
2105                         return true;
2106                 }
2107                 /* EAGAIN returns an empty but non-NULL string, so this
2108                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2109                  */
2110                 return (data && !*data);
2111         }
2112
2113         int WriteLine(std::string line)
2114         {
2115                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2116                 if (this->ctx_out)
2117                 {
2118                         char result[10240];
2119                         char result64[10240];
2120                         if (this->keylength)
2121                         {
2122                                 // pad it to the key length
2123                                 int n = this->keylength - (line.length() % this->keylength);
2124                                 if (n)
2125                                 {
2126                                         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);
2127                                         line.append(n,'\7');
2128                                 }
2129                         }
2130                         unsigned int ll = line.length();
2131                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2132                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2133                         line = result64;
2134                         //int from64tobits(char *out, const char *in, int maxlen);
2135                 }
2136                 return this->Write(line + "\r\n");
2137         }
2138
2139         /* Handle ERROR command */
2140         bool Error(std::deque<std::string> &params)
2141         {
2142                 if (params.size() < 1)
2143                         return false;
2144                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2145                 /* we will return false to cause the socket to close. */
2146                 return false;
2147         }
2148
2149         /** remote MOTD. leet, huh? */
2150         bool Motd(std::string prefix, std::deque<std::string> &params)
2151         {
2152                 if (params.size() > 0)
2153                 {
2154                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2155                         {
2156                                 /* It's for our server */
2157                                 string_list results;
2158                                 userrec* source = this->Instance->FindNick(prefix);
2159
2160                                 if (source)
2161                                 {
2162                                         std::deque<std::string> par;
2163                                         par.push_back(prefix);
2164                                         par.push_back("");
2165
2166                                         if (!Instance->Config->MOTD.size())
2167                                         {
2168                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2169                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2170                                                 return true;
2171                                         }
2172
2173                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2174                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2175
2176                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2177                                         {
2178                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2179                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2180                                         }
2181
2182                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2183                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2184                                 }
2185                         }
2186                         else
2187                         {
2188                                 /* Pass it on */
2189                                 userrec* source = this->Instance->FindNick(prefix);
2190                                 if (source)
2191                                         DoOneToOne(prefix, "MOTD", params, params[0]);
2192                         }
2193                 }
2194                 return true;
2195         }
2196
2197         /** remote ADMIN. leet, huh? */
2198         bool Admin(std::string prefix, std::deque<std::string> &params)
2199         {
2200                 if (params.size() > 0)
2201                 {
2202                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2203                         {
2204                                 /* It's for our server */
2205                                 string_list results;
2206                                 userrec* source = this->Instance->FindNick(prefix);
2207
2208                                 if (source)
2209                                 {
2210                                         std::deque<std::string> par;
2211                                         par.push_back(prefix);
2212                                         par.push_back("");
2213
2214                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2215                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2216
2217                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2218                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2219
2220                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2221                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2222
2223                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2224                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2225                                 }
2226                         }
2227                         else
2228                         {
2229                                 /* Pass it on */
2230                                 userrec* source = this->Instance->FindNick(prefix);
2231                                 if (source)
2232                                         DoOneToOne(prefix, "ADMIN", params, params[0]);
2233                         }
2234                 }
2235                 return true;
2236         }
2237
2238         bool Stats(std::string prefix, std::deque<std::string> &params)
2239         {
2240                 /* Get the reply to a STATS query if it matches this servername,
2241                  * and send it back as a load of PUSH queries
2242                  */
2243                 if (params.size() > 1)
2244                 {
2245                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2246                         {
2247                                 /* It's for our server */
2248                                 string_list results;
2249                                 userrec* source = this->Instance->FindNick(prefix);
2250                                 if (source)
2251                                 {
2252                                         std::deque<std::string> par;
2253                                         par.push_back(prefix);
2254                                         par.push_back("");
2255                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2256                                         for (size_t i = 0; i < results.size(); i++)
2257                                         {
2258                                                 par[1] = "::" + results[i];
2259                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2260                                         }
2261                                 }
2262                         }
2263                         else
2264                         {
2265                                 /* Pass it on */
2266                                 userrec* source = this->Instance->FindNick(prefix);
2267                                 if (source)
2268                                         DoOneToOne(prefix, "STATS", params, params[1]);
2269                         }
2270                 }
2271                 return true;
2272         }
2273
2274
2275         /** Because the core won't let users or even SERVERS set +o,
2276          * we use the OPERTYPE command to do this.
2277          */
2278         bool OperType(std::string prefix, std::deque<std::string> &params)
2279         {
2280                 if (params.size() != 1)
2281                 {
2282                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2283                         return true;
2284                 }
2285                 std::string opertype = params[0];
2286                 userrec* u = this->Instance->FindNick(prefix);
2287                 if (u)
2288                 {
2289                         u->modes[UM_OPERATOR] = 1;
2290                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2291                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2292                 }
2293                 return true;
2294         }
2295
2296         /** Because Andy insists that services-compatible servers must
2297          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2298          */
2299         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2300         {
2301                 if (params.size() < 3)
2302                         return true;
2303
2304                 userrec* u = this->Instance->FindNick(params[0]);
2305
2306                 if (u)
2307                 {
2308                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2309                         if (IS_LOCAL(u))
2310                         {
2311                                 std::deque<std::string> par;
2312                                 par.push_back(params[1]);
2313                                 /* This is not required as one is sent in OnUserPostNick below
2314                                  */
2315                                 //DoOneToMany(u->nick,"NICK",par);
2316                                 if (!u->ForceNickChange(params[1].c_str()))
2317                                 {
2318                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2319                                         return true;
2320                                 }
2321                                 u->age = atoi(params[2].c_str());
2322                         }
2323                 }
2324                 return true;
2325         }
2326
2327         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2328         {
2329                 if (params.size() < 2)
2330                         return true;
2331
2332                 userrec* u = this->Instance->FindNick(params[0]);
2333
2334                 if (u)
2335                 {
2336                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2337                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2338                 }
2339                 return true;
2340         }
2341
2342         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2343         {
2344                 if (params.size() < 1)
2345                         return false;
2346
2347                 std::string servermask = params[0];
2348
2349                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2350                 {
2351                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2352                         this->Instance->RehashServer();
2353                         ReadConfiguration(false);
2354                         InitializeDisabledCommands(ServerInstance->Config->DisabledCommands, ServerInstance);
2355                 }
2356                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2357                 return true;
2358         }
2359
2360         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2361         {
2362                 if (params.size() != 2)
2363                         return true;
2364
2365                 std::string nick = params[0];
2366                 userrec* u = this->Instance->FindNick(prefix);
2367                 userrec* who = this->Instance->FindNick(nick);
2368
2369                 if (who)
2370                 {
2371                         /* Prepend kill source, if we don't have one */
2372                         std::string sourceserv = prefix;
2373                         if (u)
2374                         {
2375                                 sourceserv = u->server;
2376                         }
2377                         if (*(params[1].c_str()) != '[')
2378                         {
2379                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2380                         }
2381                         std::string reason = params[1];
2382                         params[1] = ":" + params[1];
2383                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2384                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2385                         userrec::QuitUser(this->Instance,who,reason);
2386                 }
2387                 return true;
2388         }
2389
2390         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2391         {
2392                 if (params.size() < 1)
2393                         return true;
2394
2395                 if (params.size() == 1)
2396                 {
2397                         TreeServer* ServerSource = FindServer(prefix);
2398                         if (ServerSource)
2399                         {
2400                                 ServerSource->SetPingFlag();
2401                         }
2402                 }
2403                 else
2404                 {
2405                         std::string forwardto = params[1];
2406                         if (forwardto == this->Instance->Config->ServerName)
2407                         {
2408                                 /*
2409                                  * this is a PONG for us
2410                                  * if the prefix is a user, check theyre local, and if they are,
2411                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2412                                  * Services might want to send these s->s, but we dont need to yet.
2413                                  */
2414                                 userrec* u = this->Instance->FindNick(prefix);
2415
2416                                 if (u)
2417                                 {
2418                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2419                                 }
2420                         }
2421                         else
2422                         {
2423                                 // not for us, pass it on :)
2424                                 DoOneToOne(prefix,"PONG",params,forwardto);
2425                         }
2426                 }
2427
2428                 return true;
2429         }
2430
2431         bool MetaData(std::string prefix, std::deque<std::string> &params)
2432         {
2433                 if (params.size() < 3)
2434                         return true;
2435
2436                 TreeServer* ServerSource = FindServer(prefix);
2437
2438                 if (ServerSource)
2439                 {
2440                         if (params[0] == "*")
2441                         {
2442                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2443                         }
2444                         else if (*(params[0].c_str()) == '#')
2445                         {
2446                                 chanrec* c = this->Instance->FindChan(params[0]);
2447                                 if (c)
2448                                 {
2449                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2450                                 }
2451                         }
2452                         else if (*(params[0].c_str()) != '#')
2453                         {
2454                                 userrec* u = this->Instance->FindNick(params[0]);
2455                                 if (u)
2456                                 {
2457                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2458                                 }
2459                         }
2460                 }
2461
2462                 params[2] = ":" + params[2];
2463                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2464                 return true;
2465         }
2466
2467         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2468         {
2469                 if (params.size() < 1)
2470                         return true;
2471
2472                 TreeServer* ServerSource = FindServer(prefix);
2473
2474                 if (ServerSource)
2475                 {
2476                         ServerSource->SetVersion(params[0]);
2477                 }
2478                 params[0] = ":" + params[0];
2479                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2480                 return true;
2481         }
2482
2483         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2484         {
2485                 if (params.size() < 1)
2486                         return true;
2487
2488                 userrec* u = this->Instance->FindNick(prefix);
2489
2490                 if (u)
2491                 {
2492                         u->ChangeDisplayedHost(params[0].c_str());
2493                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2494                 }
2495                 return true;
2496         }
2497
2498         bool AddLine(std::string prefix, std::deque<std::string> &params)
2499         {
2500                 if (params.size() < 6)
2501                         return true;
2502
2503                 bool propogate = false;
2504
2505                 switch (*(params[0].c_str()))
2506                 {
2507                         case 'Z':
2508                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2509                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2510                         break;
2511                         case 'Q':
2512                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2513                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2514                         break;
2515                         case 'E':
2516                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2517                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2518                         break;
2519                         case 'G':
2520                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2521                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2522                         break;
2523                         case 'K':
2524                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2525                         break;
2526                         default:
2527                                 /* Just in case... */
2528                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2529                                 propogate = false;
2530                         break;
2531                 }
2532
2533                 /* Send it on its way */
2534                 if (propogate)
2535                 {
2536                         if (atoi(params[4].c_str()))
2537                         {
2538                                 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());
2539                         }
2540                         else
2541                         {
2542                                 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());
2543                         }
2544                         params[5] = ":" + params[5];
2545                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2546                 }
2547                 if (!this->bursting)
2548                 {
2549                         Instance->Log(DEBUG,"Applying lines...");
2550                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2551                 }
2552                 return true;
2553         }
2554
2555         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2556         {
2557                 if (params.size() < 1)
2558                         return true;
2559
2560                 userrec* u = this->Instance->FindNick(prefix);
2561
2562                 if (u)
2563                 {
2564                         u->ChangeName(params[0].c_str());
2565                         params[0] = ":" + params[0];
2566                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2567                 }
2568                 return true;
2569         }
2570
2571         bool Whois(std::string prefix, std::deque<std::string> &params)
2572         {
2573                 if (params.size() < 1)
2574                         return true;
2575
2576                 Instance->Log(DEBUG,"In IDLE command");
2577                 userrec* u = this->Instance->FindNick(prefix);
2578
2579                 if (u)
2580                 {
2581                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2582                         // an incoming request
2583                         if (params.size() == 1)
2584                         {
2585                                 userrec* x = this->Instance->FindNick(params[0]);
2586                                 if ((x) && (IS_LOCAL(x)))
2587                                 {
2588                                         userrec* x = this->Instance->FindNick(params[0]);
2589                                         char signon[MAXBUF];
2590                                         char idle[MAXBUF];
2591
2592                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2593                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2594                                         std::deque<std::string> par;
2595                                         par.push_back(prefix);
2596                                         par.push_back(signon);
2597                                         par.push_back(idle);
2598                                         // ours, we're done, pass it BACK
2599                                         DoOneToOne(params[0],"IDLE",par,u->server);
2600                                 }
2601                                 else
2602                                 {
2603                                         // not ours pass it on
2604                                         DoOneToOne(prefix,"IDLE",params,x->server);
2605                                 }
2606                         }
2607                         else if (params.size() == 3)
2608                         {
2609                                 std::string who_did_the_whois = params[0];
2610                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2611                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2612                                 {
2613                                         // an incoming reply to a whois we sent out
2614                                         std::string nick_whoised = prefix;
2615                                         unsigned long signon = atoi(params[1].c_str());
2616                                         unsigned long idle = atoi(params[2].c_str());
2617                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2618                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2619                                 }
2620                                 else
2621                                 {
2622                                         // not ours, pass it on
2623                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2624                                 }
2625                         }
2626                 }
2627                 return true;
2628         }
2629
2630         bool Push(std::string prefix, std::deque<std::string> &params)
2631         {
2632                 if (params.size() < 2)
2633                         return true;
2634
2635                 userrec* u = this->Instance->FindNick(params[0]);
2636
2637                 if (!u)
2638                         return true;
2639
2640                 if (IS_LOCAL(u))
2641                 {
2642                         u->Write(params[1]);
2643                 }
2644                 else
2645                 {
2646                         // continue the raw onwards
2647                         params[1] = ":" + params[1];
2648                         DoOneToOne(prefix,"PUSH",params,u->server);
2649                 }
2650                 return true;
2651         }
2652
2653         bool Time(std::string prefix, std::deque<std::string> &params)
2654         {
2655                 // :source.server TIME remote.server sendernick
2656                 // :remote.server TIME source.server sendernick TS
2657                 if (params.size() == 2)
2658                 {
2659                         // someone querying our time?
2660                         if (this->Instance->Config->ServerName == params[0])
2661                         {
2662                                 userrec* u = this->Instance->FindNick(params[1]);
2663                                 if (u)
2664                                 {
2665                                         char curtime[256];
2666                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2667                                         params.push_back(curtime);
2668                                         params[0] = prefix;
2669                                         DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2670                                 }
2671                         }
2672                         else
2673                         {
2674                                 // not us, pass it on
2675                                 userrec* u = this->Instance->FindNick(params[1]);
2676                                 if (u)
2677                                         DoOneToOne(prefix,"TIME",params,params[0]);
2678                         }
2679                 }
2680                 else if (params.size() == 3)
2681                 {
2682                         // a response to a previous TIME
2683                         userrec* u = this->Instance->FindNick(params[1]);
2684                         if ((u) && (IS_LOCAL(u)))
2685                         {
2686                         time_t rawtime = atol(params[2].c_str());
2687                         struct tm * timeinfo;
2688                         timeinfo = localtime(&rawtime);
2689                                 char tms[26];
2690                                 snprintf(tms,26,"%s",asctime(timeinfo));
2691                                 tms[24] = 0;
2692                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2693                         }
2694                         else
2695                         {
2696                                 if (u)
2697                                         DoOneToOne(prefix,"TIME",params,u->server);
2698                         }
2699                 }
2700                 return true;
2701         }
2702
2703         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2704         {
2705                 if (params.size() < 1)
2706                         return true;
2707
2708                 if (params.size() == 1)
2709                 {
2710                         std::string stufftobounce = params[0];
2711                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2712                         return true;
2713                 }
2714                 else
2715                 {
2716                         std::string forwardto = params[1];
2717                         if (forwardto == this->Instance->Config->ServerName)
2718                         {
2719                                 // this is a ping for us, send back PONG to the requesting server
2720                                 params[1] = params[0];
2721                                 params[0] = forwardto;
2722                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2723                         }
2724                         else
2725                         {
2726                                 // not for us, pass it on :)
2727                                 DoOneToOne(prefix,"PING",params,forwardto);
2728                         }
2729                         return true;
2730                 }
2731         }
2732
2733         bool RemoveStatus(std::string prefix, std::deque<std::string> &params)
2734         {
2735                 if (params.size() < 1)
2736                         return true;
2737
2738                 chanrec* c = Instance->FindChan(params[0]);
2739
2740                 if (c)
2741                 {
2742                         irc::modestacker modestack(false);
2743                         CUList *ulist = c->GetUsers();
2744                         const char* y[127];
2745                         std::deque<std::string> stackresult;
2746                         std::string x;
2747
2748                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2749                         {
2750                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2751                                 if (modesequence.length())
2752                                 {
2753                                         ServerInstance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2754                                         irc::spacesepstream sep(modesequence);
2755                                         std::string modeletters = sep.GetToken();
2756                                         ServerInstance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2757
2758                                         while (!modeletters.empty())
2759                                         {
2760                                                 char mletter = *(modeletters.begin());
2761                                                 modestack.Push(mletter,sep.GetToken());
2762                                                 ServerInstance->Log(DEBUG,"Push letter = '%c'",mletter);
2763                                                 modeletters.erase(modeletters.begin());
2764                                                 ServerInstance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2765                                         }
2766                                 }
2767                         }
2768
2769                         while (modestack.GetStackedLine(stackresult))
2770                         {
2771                                 ServerInstance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2772                                 stackresult.push_front(ConvToStr(c->age));
2773                                 stackresult.push_front(c->name);
2774                                 DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2775                                 stackresult.erase(stackresult.begin() + 1);
2776                                 ServerInstance->Log(DEBUG,"Stacked items:");
2777                                 for (size_t z = 0; z < stackresult.size(); z++)
2778                                 {
2779                                         y[z] = stackresult[z].c_str();
2780                                         ServerInstance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2781                                 }
2782                                 userrec* n = new userrec(Instance);
2783                                 n->SetFd(FD_MAGIC_NUMBER);
2784                                 Instance->SendMode(y, stackresult.size(), n);
2785                                 delete n;
2786                         }
2787                 }
2788                 return true;
2789         }
2790
2791         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2792         {
2793                 if (params.size() < 4)
2794                         return false;
2795
2796                 std::string servername = params[0];
2797                 std::string password = params[1];
2798                 // hopcount is not used for a remote server, we calculate this ourselves
2799                 std::string description = params[3];
2800                 TreeServer* ParentOfThis = FindServer(prefix);
2801
2802                 if (!ParentOfThis)
2803                 {
2804                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2805                         return false;
2806                 }
2807                 TreeServer* CheckDupe = FindServer(servername);
2808                 if (CheckDupe)
2809                 {
2810                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2811                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2812                         return false;
2813                 }
2814                 TreeServer* Node = new TreeServer(this->Instance,servername,description,ParentOfThis,NULL);
2815                 ParentOfThis->AddChild(Node);
2816                 params[3] = ":" + params[3];
2817                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2818                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2819                 return true;
2820         }
2821
2822         bool Outbound_Reply_Server(std::deque<std::string> &params)
2823         {
2824                 if (params.size() < 4)
2825                         return false;
2826
2827                 irc::string servername = params[0].c_str();
2828                 std::string sname = params[0];
2829                 std::string password = params[1];
2830                 int hops = atoi(params[2].c_str());
2831
2832                 if (hops)
2833                 {
2834                         this->WriteLine("ERROR :Server too far away for authentication");
2835                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2836                         return false;
2837                 }
2838                 std::string description = params[3];
2839                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2840                 {
2841                         if ((x->Name == servername) && (x->RecvPass == password))
2842                         {
2843                                 TreeServer* CheckDupe = FindServer(sname);
2844                                 if (CheckDupe)
2845                                 {
2846                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2847                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2848                                         return false;
2849                                 }
2850                                 // Begin the sync here. this kickstarts the
2851                                 // other side, waiting in WAIT_AUTH_2 state,
2852                                 // into starting their burst, as it shows
2853                                 // that we're happy.
2854                                 this->LinkState = CONNECTED;
2855                                 // we should add the details of this server now
2856                                 // to the servers tree, as a child of the root
2857                                 // node.
2858                                 TreeServer* Node = new TreeServer(this->Instance,sname,description,TreeRoot,this);
2859                                 TreeRoot->AddChild(Node);
2860                                 params[3] = ":" + params[3];
2861                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2862                                 this->bursting = true;
2863                                 this->DoBurst(Node);
2864                                 return true;
2865                         }
2866                 }
2867                 this->WriteLine("ERROR :Invalid credentials");
2868                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2869                 return false;
2870         }
2871
2872         bool Inbound_Server(std::deque<std::string> &params)
2873         {
2874                 if (params.size() < 4)
2875                         return false;
2876
2877                 irc::string servername = params[0].c_str();
2878                 std::string sname = params[0];
2879                 std::string password = params[1];
2880                 int hops = atoi(params[2].c_str());
2881
2882                 if (hops)
2883                 {
2884                         this->WriteLine("ERROR :Server too far away for authentication");
2885                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2886                         return false;
2887                 }
2888                 std::string description = params[3];
2889                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2890                 {
2891                         if ((x->Name == servername) && (x->RecvPass == password))
2892                         {
2893                                 TreeServer* CheckDupe = FindServer(sname);
2894                                 if (CheckDupe)
2895                                 {
2896                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2897                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2898                                         return false;
2899                                 }
2900                                 /* If the config says this link is encrypted, but the remote side
2901                                  * hasnt bothered to send the AES command before SERVER, then we
2902                                  * boot them off as we MUST have this connection encrypted.
2903                                  */
2904                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2905                                 {
2906                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2907                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2908                                         return false;
2909                                 }
2910                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2911                                 this->InboundServerName = sname;
2912                                 this->InboundDescription = description;
2913                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2914                                 // along with the sendpass from this block.
2915                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2916                                 // move to the next state, we are now waiting for THEM.
2917                                 this->LinkState = WAIT_AUTH_2;
2918                                 return true;
2919                         }
2920                 }
2921                 this->WriteLine("ERROR :Invalid credentials");
2922                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2923                 return false;
2924         }
2925
2926         void Split(std::string line, std::deque<std::string> &n)
2927         {
2928                 n.clear();
2929                 irc::tokenstream tokens(line);
2930                 std::string param;
2931                 while ((param = tokens.GetToken()) != "")
2932                         n.push_back(param);
2933                 return;
2934         }
2935
2936         bool ProcessLine(std::string line)
2937         {
2938                 std::deque<std::string> params;
2939                 irc::string command;
2940                 std::string prefix;
2941
2942                 if (line.empty())
2943                         return true;
2944
2945                 line = line.substr(0, line.find_first_of("\r\n"));
2946
2947                 Instance->Log(DEBUG,"IN: %s", line.c_str());
2948
2949                 this->Split(line.c_str(),params);
2950
2951                 if ((params[0][0] == ':') && (params.size() > 1))
2952                 {
2953                         prefix = params[0].substr(1);
2954                         params.pop_front();
2955                 }
2956
2957                 command = params[0].c_str();
2958                 params.pop_front();
2959
2960                 if ((!this->ctx_in) && (command == "AES"))
2961                 {
2962                         std::string sserv = params[0];
2963                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2964                         {
2965                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2966                                 {
2967                                         this->InitAES(x->EncryptionKey,sserv);
2968                                 }
2969                         }
2970
2971                         return true;
2972                 }
2973                 else if ((this->ctx_in) && (command == "AES"))
2974                 {
2975                         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());
2976                 }
2977
2978                 switch (this->LinkState)
2979                 {
2980                         TreeServer* Node;
2981
2982                         case WAIT_AUTH_1:
2983                                 // Waiting for SERVER command from remote server. Server initiating
2984                                 // the connection sends the first SERVER command, listening server
2985                                 // replies with theirs if its happy, then if the initiator is happy,
2986                                 // it starts to send its net sync, which starts the merge, otherwise
2987                                 // it sends an ERROR.
2988                                 if (command == "PASS")
2989                                 {
2990                                         /* Silently ignored */
2991                                 }
2992                                 else if (command == "SERVER")
2993                                 {
2994                                         return this->Inbound_Server(params);
2995                                 }
2996                                 else if (command == "ERROR")
2997                                 {
2998                                         return this->Error(params);
2999                                 }
3000                                 else if (command == "USER")
3001                                 {
3002                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
3003                                         return false;
3004                                 }
3005                                 else if (command == "CAPAB")
3006                                 {
3007                                         return this->Capab(params);
3008                                 }
3009                                 else if ((command == "U") || (command == "S"))
3010                                 {
3011                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3012                                         return false;
3013                                 }
3014                                 else
3015                                 {
3016                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
3017                                         return false;
3018                                 }
3019                         break;
3020                         case WAIT_AUTH_2:
3021                                 // Waiting for start of other side's netmerge to say they liked our
3022                                 // password.
3023                                 if (command == "SERVER")
3024                                 {
3025                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
3026                                         // silently ignore.
3027                                         return true;
3028                                 }
3029                                 else if ((command == "U") || (command == "S"))
3030                                 {
3031                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3032                                         return false;
3033                                 }
3034                                 else if (command == "BURST")
3035                                 {
3036                                         if (params.size())
3037                                         {
3038                                                 /* If a time stamp is provided, try and check syncronization */
3039                                                 time_t THEM = atoi(params[0].c_str());
3040                                                 long delta = THEM-time(NULL);
3041                                                 if ((delta < -600) || (delta > 600))
3042                                                 {
3043                                                         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));
3044                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
3045                                                         return false;
3046                                                 }
3047                                                 else if ((delta < -60) || (delta > 60))
3048                                                 {
3049                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
3050                                                 }
3051                                         }
3052                                         this->LinkState = CONNECTED;
3053                                         Node = new TreeServer(this->Instance,InboundServerName,InboundDescription,TreeRoot,this);
3054                                         TreeRoot->AddChild(Node);
3055                                         params.clear();
3056                                         params.push_back(InboundServerName);
3057                                         params.push_back("*");
3058                                         params.push_back("1");
3059                                         params.push_back(":"+InboundDescription);
3060                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
3061                                         this->bursting = true;
3062                                         this->DoBurst(Node);
3063                                 }
3064                                 else if (command == "ERROR")
3065                                 {
3066                                         return this->Error(params);
3067                                 }
3068                                 else if (command == "CAPAB")
3069                                 {
3070                                         return this->Capab(params);
3071                                 }
3072
3073                         break;
3074                         case LISTENER:
3075                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
3076                                 return false;
3077                         break;
3078                         case CONNECTING:
3079                                 if (command == "SERVER")
3080                                 {
3081                                         // another server we connected to, which was in WAIT_AUTH_1 state,
3082                                         // has just sent us their credentials. If we get this far, theyre
3083                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
3084                                         // if we're happy with this, we should send our netburst which
3085                                         // kickstarts the merge.
3086                                         return this->Outbound_Reply_Server(params);
3087                                 }
3088                                 else if (command == "ERROR")
3089                                 {
3090                                         return this->Error(params);
3091                                 }
3092                         break;
3093                         case CONNECTED:
3094                                 // This is the 'authenticated' state, when all passwords
3095                                 // have been exchanged and anything past this point is taken
3096                                 // as gospel.
3097
3098                                 if (prefix != "")
3099                                 {
3100                                         std::string direction = prefix;
3101                                         userrec* t = this->Instance->FindNick(prefix);
3102                                         if (t)
3103                                         {
3104                                                 direction = t->server;
3105                                         }
3106                                         TreeServer* route_back_again = BestRouteTo(direction);
3107                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3108                                         {
3109                                                 if (route_back_again)
3110                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3111                                                 return true;
3112                                         }
3113
3114                                         /* Fix by brain:
3115                                          * When there is activity on the socket, reset the ping counter so
3116                                          * that we're not wasting bandwidth pinging an active server.
3117                                          */
3118                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3119                                         route_back_again->SetPingFlag();
3120                                 }
3121
3122                                 if (command == "SVSMODE")
3123                                 {
3124                                         /* Services expects us to implement
3125                                          * SVSMODE. In inspircd its the same as
3126                                          * MODE anyway.
3127                                          */
3128                                         command = "MODE";
3129                                 }
3130                                 std::string target = "";
3131                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3132                                  * working with std::string here.
3133                                  */
3134                                 if ((command == "NICK") && (params.size() > 1))
3135                                 {
3136                                         return this->IntroduceClient(prefix,params);
3137                                 }
3138                                 else if (command == "FJOIN")
3139                                 {
3140                                         return this->ForceJoin(prefix,params);
3141                                 }
3142                                 else if (command == "STATS")
3143                                 {
3144                                         return this->Stats(prefix, params);
3145                                 }
3146                                 else if (command == "MOTD")
3147                                 {
3148                                         return this->Motd(prefix, params);
3149                                 }
3150                                 else if (command == "ADMIN")
3151                                 {
3152                                         return this->Admin(prefix, params);
3153                                 }
3154                                 else if (command == "SERVER")
3155                                 {
3156                                         return this->RemoteServer(prefix,params);
3157                                 }
3158                                 else if (command == "ERROR")
3159                                 {
3160                                         return this->Error(params);
3161                                 }
3162                                 else if (command == "OPERTYPE")
3163                                 {
3164                                         return this->OperType(prefix,params);
3165                                 }
3166                                 else if (command == "FMODE")
3167                                 {
3168                                         return this->ForceMode(prefix,params);
3169                                 }
3170                                 else if (command == "KILL")
3171                                 {
3172                                         return this->RemoteKill(prefix,params);
3173                                 }
3174                                 else if (command == "FTOPIC")
3175                                 {
3176                                         return this->ForceTopic(prefix,params);
3177                                 }
3178                                 else if (command == "REHASH")
3179                                 {
3180                                         return this->RemoteRehash(prefix,params);
3181                                 }
3182                                 else if (command == "METADATA")
3183                                 {
3184                                         return this->MetaData(prefix,params);
3185                                 }
3186                                 else if (command == "REMSTATUS")
3187                                 {
3188                                         return this->RemoveStatus(prefix,params);
3189                                 }
3190                                 else if (command == "PING")
3191                                 {
3192                                         /*
3193                                          * We just got a ping from a server that's bursting.
3194                                          * This can't be right, so set them to not bursting, and
3195                                          * apply their lines.
3196                                          */
3197                                         if (this->bursting)
3198                                         {
3199                                                 this->bursting = false;
3200                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3201                                         }
3202                                         if (prefix == "")
3203                                         {
3204                                                 prefix = this->GetName();
3205                                         }
3206                                         return this->LocalPing(prefix,params);
3207                                 }
3208                                 else if (command == "PONG")
3209                                 {
3210                                         /*
3211                                          * We just got a pong from a server that's bursting.
3212                                          * This can't be right, so set them to not bursting, and
3213                                          * apply their lines.
3214                                          */
3215                                         if (this->bursting)
3216                                         {
3217                                                 this->bursting = false;
3218                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3219                                         }
3220                                         if (prefix == "")
3221                                         {
3222                                                 prefix = this->GetName();
3223                                         }
3224                                         return this->LocalPong(prefix,params);
3225                                 }
3226                                 else if (command == "VERSION")
3227                                 {
3228                                         return this->ServerVersion(prefix,params);
3229                                 }
3230                                 else if (command == "FHOST")
3231                                 {
3232                                         return this->ChangeHost(prefix,params);
3233                                 }
3234                                 else if (command == "FNAME")
3235                                 {
3236                                         return this->ChangeName(prefix,params);
3237                                 }
3238                                 else if (command == "ADDLINE")
3239                                 {
3240                                         return this->AddLine(prefix,params);
3241                                 }
3242                                 else if (command == "SVSNICK")
3243                                 {
3244                                         if (prefix == "")
3245                                         {
3246                                                 prefix = this->GetName();
3247                                         }
3248                                         return this->ForceNick(prefix,params);
3249                                 }
3250                                 else if (command == "IDLE")
3251                                 {
3252                                         return this->Whois(prefix,params);
3253                                 }
3254                                 else if (command == "PUSH")
3255                                 {
3256                                         return this->Push(prefix,params);
3257                                 }
3258                                 else if (command == "TIME")
3259                                 {
3260                                         return this->Time(prefix,params);
3261                                 }
3262                                 else if ((command == "KICK") && (IsServer(prefix)))
3263                                 {
3264                                         std::string sourceserv = this->myhost;
3265                                         if (params.size() == 3)
3266                                         {
3267                                                 userrec* user = this->Instance->FindNick(params[1]);
3268                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3269                                                 if (user && chan)
3270                                                 {
3271                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3272                                                                 /* Yikes, the channels gone! */
3273                                                                 delete chan;
3274                                                 }
3275                                         }
3276                                         if (this->InboundServerName != "")
3277                                         {
3278                                                 sourceserv = this->InboundServerName;
3279                                         }
3280                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3281                                 }
3282                                 else if (command == "SVSJOIN")
3283                                 {
3284                                         if (prefix == "")
3285                                         {
3286                                                 prefix = this->GetName();
3287                                         }
3288                                         return this->ServiceJoin(prefix,params);
3289                                 }
3290                                 else if (command == "SQUIT")
3291                                 {
3292                                         if (params.size() == 2)
3293                                         {
3294                                                 this->Squit(FindServer(params[0]),params[1]);
3295                                         }
3296                                         return true;
3297                                 }
3298                                 else if (command == "ENDBURST")
3299                                 {
3300                                         this->bursting = false;
3301                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3302                                         std::string sourceserv = this->myhost;
3303                                         if (this->InboundServerName != "")
3304                                         {
3305                                                 sourceserv = this->InboundServerName;
3306                                         }
3307                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3308                                         return true;
3309                                 }
3310                                 else
3311                                 {
3312                                         // not a special inter-server command.
3313                                         // Emulate the actual user doing the command,
3314                                         // this saves us having a huge ugly parser.
3315                                         userrec* who = this->Instance->FindNick(prefix);
3316                                         std::string sourceserv = this->myhost;
3317                                         if (this->InboundServerName != "")
3318                                         {
3319                                                 sourceserv = this->InboundServerName;
3320                                         }
3321                                         if (who)
3322                                         {
3323                                                 if ((command == "NICK") && (params.size() > 0))
3324                                                 {
3325                                                         /* On nick messages, check that the nick doesnt
3326                                                          * already exist here. If it does, kill their copy,
3327                                                          * and our copy.
3328                                                          */
3329                                                         userrec* x = this->Instance->FindNick(params[0]);
3330                                                         if ((x) && (x != who))
3331                                                         {
3332                                                                 std::deque<std::string> p;
3333                                                                 p.push_back(params[0]);
3334                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3335                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3336                                                                 p.clear();
3337                                                                 p.push_back(prefix);
3338                                                                 p.push_back("Nickname collision");
3339                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3340                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3341                                                                 userrec* y = this->Instance->FindNick(prefix);
3342                                                                 if (y)
3343                                                                 {
3344                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3345                                                                 }
3346                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3347                                                         }
3348                                                 }
3349                                                 // its a user
3350                                                 target = who->server;
3351                                                 const char* strparams[127];
3352                                                 for (unsigned int q = 0; q < params.size(); q++)
3353                                                 {
3354                                                         strparams[q] = params[q].c_str();
3355                                                 }
3356                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3357                                                 {
3358                                                         case CMD_INVALID:
3359                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3360                                                                 return false;
3361                                                         break;
3362                                                         case CMD_FAILURE:
3363                                                                 return true;
3364                                                         break;
3365                                                         default:
3366                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3367                                                         break;
3368                                                 }
3369                                         }
3370                                         else
3371                                         {
3372                                                 // its not a user. Its either a server, or somethings screwed up.
3373                                                 if (IsServer(prefix))
3374                                                 {
3375                                                         target = this->Instance->Config->ServerName;
3376                                                 }
3377                                                 else
3378                                                 {
3379                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3380                                                         return true;
3381                                                 }
3382                                         }
3383                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3384
3385                                 }
3386                                 return true;
3387                         break;
3388                 }
3389                 return true;
3390         }
3391
3392         virtual std::string GetName()
3393         {
3394                 std::string sourceserv = this->myhost;
3395                 if (this->InboundServerName != "")
3396                 {
3397                         sourceserv = this->InboundServerName;
3398                 }
3399                 return sourceserv;
3400         }
3401
3402         virtual void OnTimeout()
3403         {
3404                 if (this->LinkState == CONNECTING)
3405                 {
3406                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3407                         Link* MyLink = FindLink(myhost);
3408                         if (MyLink)
3409                                 DoFailOver(MyLink);
3410                 }
3411         }
3412
3413         virtual void OnClose()
3414         {
3415                 // Connection closed.
3416                 // If the connection is fully up (state CONNECTED)
3417                 // then propogate a netsplit to all peers.
3418                 std::string quitserver = this->myhost;
3419                 if (this->InboundServerName != "")
3420                 {
3421                         quitserver = this->InboundServerName;
3422                 }
3423                 TreeServer* s = FindServer(quitserver);
3424                 if (s)
3425                 {
3426                         Squit(s,"Remote host closed the connection");
3427                 }
3428                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3429         }
3430
3431         virtual int OnIncomingConnection(int newsock, char* ip)
3432         {
3433                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3434                  * or discovering if this port is the server port, we don't allow connections from any
3435                  * IPs for which we don't have a link block.
3436                  */
3437                 bool found = false;
3438
3439                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3440                 if (!found)
3441                 {
3442                         for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
3443                                 if (MatchCIDR(ip, (*i).c_str()))
3444                                         found = true;
3445
3446                         if (!found)
3447                         {
3448                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3449                                 close(newsock);
3450                                 return false;
3451                         }
3452                 }
3453                 TreeSocket* s = new TreeSocket(this->Instance, newsock, ip);
3454                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3455                 return true;
3456         }
3457 };
3458
3459 /** This class is used to resolve server hostnames during /connect and autoconnect.
3460  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3461  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3462  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3463  * will have an IP address which we can then use to continue our connection.
3464  */
3465 class ServernameResolver : public Resolver
3466 {
3467  private:
3468         /** A copy of the Link tag info for what we're connecting to.
3469          * We take a copy, rather than using a pointer, just in case the
3470          * admin takes the tag away and rehashes while the domain is resolving.
3471          */
3472         Link MyLink;
3473  public:
3474         ServernameResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3475         {
3476                 /* Nothing in here, folks */
3477         }
3478
3479         void OnLookupComplete(const std::string &result)
3480         {
3481                 /* Initiate the connection, now that we have an IP to use.
3482                  * Passing a hostname directly to InspSocket causes it to
3483                  * just bail and set its FD to -1.
3484                  */
3485                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3486                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3487                 {
3488                         TreeSocket* newsocket = new TreeSocket(ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3489                         if (newsocket->GetFd() > -1)
3490                         {
3491                                 /* We're all OK */
3492                         }
3493                         else
3494                         {
3495                                 /* Something barfed, show the opers */
3496                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3497                                 delete newsocket;
3498                                 DoFailOver(&MyLink);
3499                         }
3500                 }
3501         }
3502
3503         void OnError(ResolverError e, const std::string &errormessage)
3504         {
3505                 /* Ooops! */
3506                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3507                 DoFailOver(&MyLink);
3508         }
3509 };
3510
3511 class SecurityIPResolver : public Resolver
3512 {
3513  private:
3514         Link MyLink;
3515  public:
3516         SecurityIPResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3517         {
3518         }
3519
3520         void OnLookupComplete(const std::string &result)
3521         {
3522                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3523                 ValidIPs.push_back(result);
3524         }
3525
3526         void OnError(ResolverError e, const std::string &errormessage)
3527         {
3528                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3529         }
3530 };
3531
3532 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3533 {
3534         for (unsigned int c = 0; c < list.size(); c++)
3535         {
3536                 if (list[c] == server)
3537                 {
3538                         return;
3539                 }
3540         }
3541         list.push_back(server);
3542 }
3543
3544 /** returns a list of DIRECT servernames for a specific channel */
3545 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3546 {
3547         CUList *ulist = c->GetUsers();
3548         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3549         {
3550                 if (i->second->GetFd() < 0)
3551                 {
3552                         TreeServer* best = BestRouteTo(i->second->server);
3553                         if (best)
3554                                 AddThisServer(best,list);
3555                 }
3556         }
3557         return;
3558 }
3559
3560 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3561 {
3562         TreeServer* omitroute = BestRouteTo(omit);
3563         if ((command == "NOTICE") || (command == "PRIVMSG"))
3564         {
3565                 if (params.size() >= 2)
3566                 {
3567                         /* Prefixes */
3568                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3569                         {
3570                                 params[0] = params[0].substr(1, params[0].length()-1);
3571                         }
3572                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3573                         {
3574                                 // special routing for private messages/notices
3575                                 userrec* d = ServerInstance->FindNick(params[0]);
3576                                 if (d)
3577                                 {
3578                                         std::deque<std::string> par;
3579                                         par.push_back(params[0]);
3580                                         par.push_back(":"+params[1]);
3581                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3582                                         return true;
3583                                 }
3584                         }
3585                         else if (*(params[0].c_str()) == '$')
3586                         {
3587                                 std::deque<std::string> par;
3588                                 par.push_back(params[0]);
3589                                 par.push_back(":"+params[1]);
3590                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3591                                 return true;
3592                         }
3593                         else
3594                         {
3595                                 ServerInstance->Log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3596                                 chanrec* c = ServerInstance->FindChan(params[0]);
3597                                 if (c)
3598                                 {
3599                                         std::deque<TreeServer*> list;
3600                                         GetListOfServersForChannel(c,list);
3601                                         ServerInstance->Log(DEBUG,"Got a list of %d servers",list.size());
3602                                         unsigned int lsize = list.size();
3603                                         for (unsigned int i = 0; i < lsize; i++)
3604                                         {
3605                                                 TreeSocket* Sock = list[i]->GetSocket();
3606                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3607                                                 {
3608                                                         ServerInstance->Log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3609                                                         Sock->WriteLine(data);
3610                                                 }
3611                                         }
3612                                         return true;
3613                                 }
3614                         }
3615                 }
3616         }
3617         unsigned int items = TreeRoot->ChildCount();
3618         for (unsigned int x = 0; x < items; x++)
3619         {
3620                 TreeServer* Route = TreeRoot->GetChild(x);
3621                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3622                 {
3623                         TreeSocket* Sock = Route->GetSocket();
3624                         if (Sock)
3625                                 Sock->WriteLine(data);
3626                 }
3627         }
3628         return true;
3629 }
3630
3631 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3632 {
3633         TreeServer* omitroute = BestRouteTo(omit);
3634         std::string FullLine = ":" + prefix + " " + command;
3635         unsigned int words = params.size();
3636         for (unsigned int x = 0; x < words; x++)
3637         {
3638                 FullLine = FullLine + " " + params[x];
3639         }
3640         unsigned int items = TreeRoot->ChildCount();
3641         for (unsigned int x = 0; x < items; x++)
3642         {
3643                 TreeServer* Route = TreeRoot->GetChild(x);
3644                 // Send the line IF:
3645                 // The route has a socket (its a direct connection)
3646                 // The route isnt the one to be omitted
3647                 // The route isnt the path to the one to be omitted
3648                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3649                 {
3650                         TreeSocket* Sock = Route->GetSocket();
3651                         if (Sock)
3652                                 Sock->WriteLine(FullLine);
3653                 }
3654         }
3655         return true;
3656 }
3657
3658 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3659 {
3660         std::string FullLine = ":" + prefix + " " + command;
3661         unsigned int words = params.size();
3662         for (unsigned int x = 0; x < words; x++)
3663         {
3664                 FullLine = FullLine + " " + params[x];
3665         }
3666         unsigned int items = TreeRoot->ChildCount();
3667         for (unsigned int x = 0; x < items; x++)
3668         {
3669                 TreeServer* Route = TreeRoot->GetChild(x);
3670                 if (Route && Route->GetSocket())
3671                 {
3672                         TreeSocket* Sock = Route->GetSocket();
3673                         if (Sock)
3674                                 Sock->WriteLine(FullLine);
3675                 }
3676         }
3677         return true;
3678 }
3679
3680 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3681 {
3682         std::string spfx = prefix;
3683         std::string scmd = command;
3684         return DoOneToMany(spfx, scmd, params);
3685 }
3686
3687 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3688 {
3689         std::string spfx = prefix;
3690         std::string scmd = command;
3691         return DoOneToAllButSender(spfx, scmd, params, omit);
3692 }
3693
3694 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3695 {
3696         TreeServer* Route = BestRouteTo(target);
3697         if (Route)
3698         {
3699                 std::string FullLine = ":" + prefix + " " + command;
3700                 unsigned int words = params.size();
3701                 for (unsigned int x = 0; x < words; x++)
3702                 {
3703                         FullLine = FullLine + " " + params[x];
3704                 }
3705                 if (Route && Route->GetSocket())
3706                 {
3707                         TreeSocket* Sock = Route->GetSocket();
3708                         if (Sock)
3709                                 Sock->WriteLine(FullLine);
3710                 }
3711                 return true;
3712         }
3713         else
3714         {
3715                 return false;
3716         }
3717 }
3718
3719 std::vector<TreeSocket*> Bindings;
3720
3721 void ReadConfiguration(bool rebind)
3722 {
3723         Conf = new ConfigReader(ServerInstance);
3724         if (rebind)
3725         {
3726                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3727                 {
3728                         std::string Type = Conf->ReadValue("bind","type",j);
3729                         std::string IP = Conf->ReadValue("bind","address",j);
3730                         long Port = Conf->ReadInteger("bind","port",j,true);
3731                         if (Type == "servers")
3732                         {
3733                                 if (IP == "*")
3734                                 {
3735                                         IP = "";
3736                                 }
3737                                 TreeSocket* listener = new TreeSocket(ServerInstance, IP.c_str(),Port,true,10);
3738                                 if (listener->GetState() == I_LISTENING)
3739                                 {
3740                                         Bindings.push_back(listener);
3741                                 }
3742                                 else
3743                                 {
3744                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3745                                         listener->Close();
3746                                         DELETE(listener);
3747                                 }
3748                         }
3749                 }
3750         }
3751         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3752         HideULines = Conf->ReadFlag("options","hideulines",0);
3753         LinkBlocks.clear();
3754         ValidIPs.clear();
3755         for (int j =0; j < Conf->Enumerate("link"); j++)
3756         {
3757                 Link L;
3758                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3759                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3760                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3761                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3762                 L.Port = Conf->ReadInteger("link","port",j,true);
3763                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3764                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3765                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3766                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3767                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3768                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3769                 /* Bugfix by brain, do not allow people to enter bad configurations */
3770                 if (L.Name != ServerInstance->Config->ServerName)
3771                 {
3772                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3773                         {
3774                                 ValidIPs.push_back(L.IPAddr);
3775
3776                                 if (Allow.length())
3777                                         ValidIPs.push_back(Allow);
3778
3779                                 /* Needs resolving */
3780                                 insp_inaddr binip;
3781                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3782                                 {
3783                                         try
3784                                         {
3785                                                 SecurityIPResolver* sr = new SecurityIPResolver(ServerInstance, L.IPAddr, L);
3786                                                 ServerInstance->AddResolver(sr);
3787                                         }
3788                                         catch (ModuleException& e)
3789                                         {
3790                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3791                                         }
3792                                 }
3793
3794                                 LinkBlocks.push_back(L);
3795                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3796                         }
3797                         else
3798                         {
3799                                 if (L.IPAddr == "")
3800                                 {
3801                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3802                                 }
3803                                 else if (L.RecvPass == "")
3804                                 {
3805                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3806                                 }
3807                                 else if (L.SendPass == "")
3808                                 {
3809                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3810                                 }
3811                                 else if (L.Name == "")
3812                                 {
3813                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3814                                 }
3815                                 else if (!L.Port)
3816                                 {
3817                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3818                                 }
3819                         }
3820                 }
3821                 else
3822                 {
3823                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3824                 }
3825         }
3826         DELETE(Conf);
3827 }
3828
3829
3830 class ModuleSpanningTree : public Module
3831 {
3832         std::vector<TreeSocket*> Bindings;
3833         int line;
3834         int NumServers;
3835         unsigned int max_local;
3836         unsigned int max_global;
3837         cmd_rconnect* command_rconnect;
3838
3839  public:
3840
3841         ModuleSpanningTree(InspIRCd* Me)
3842                 : Module::Module(Me), max_local(0), max_global(0)
3843         {
3844
3845                 Bindings.clear();
3846
3847                 ::ServerInstance = Me;
3848
3849                 // Create the root of the tree
3850                 TreeRoot = new TreeServer(ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3851
3852                 ReadConfiguration(true);
3853
3854                 command_rconnect = new cmd_rconnect(ServerInstance, this);
3855                 ServerInstance->AddCommand(command_rconnect);
3856         }
3857
3858         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3859         {
3860                 std::string Parent = TreeRoot->GetName();
3861                 if (Current->GetParent())
3862                 {
3863                         Parent = Current->GetParent()->GetName();
3864                 }
3865                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3866                 {
3867                         if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3868                         {
3869                                 if (*user->oper)
3870                                 {
3871                                          ShowLinks(Current->GetChild(q),user,hops+1);
3872                                 }
3873                         }
3874                         else
3875                         {
3876                                 ShowLinks(Current->GetChild(q),user,hops+1);
3877                         }
3878                 }
3879                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3880                 if ((HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3881                         return;
3882                 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());
3883         }
3884
3885         int CountLocalServs()
3886         {
3887                 return TreeRoot->ChildCount();
3888         }
3889
3890         int CountServs()
3891         {
3892                 return serverlist.size();
3893         }
3894
3895         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3896         {
3897                 ShowLinks(TreeRoot,user,0);
3898                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3899                 return;
3900         }
3901
3902         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3903         {
3904                 unsigned int n_users = ServerInstance->UserCount();
3905
3906                 /* Only update these when someone wants to see them, more efficient */
3907                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3908                         max_local = ServerInstance->LocalUserCount();
3909                 if (n_users > max_global)
3910                         max_global = n_users;
3911
3912                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3913                 if (ServerInstance->OperCount())
3914                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3915                 if (ServerInstance->UnregisteredUserCount())
3916                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3917                 if (ServerInstance->ChannelCount())
3918                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3919                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3920                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3921                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3922                 return;
3923         }
3924
3925         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3926
3927         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3928         {
3929                 if (line < 128)
3930                 {
3931                         for (int t = 0; t < depth; t++)
3932                         {
3933                                 matrix[line][t] = ' ';
3934                         }
3935
3936                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3937                         // a 'Spacer' String to compensate.
3938                         char spacer[40];
3939
3940                         memset(spacer,' ',40);
3941                         if ((40 - Current->GetName().length() - depth) > 1) {
3942                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3943                         }
3944                         else
3945                         {
3946                                 spacer[5] = '\0';
3947                         }
3948
3949                         float percent;
3950                         char text[80];
3951                         if (ServerInstance->clientlist.size() == 0) {
3952                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3953                                 percent = 0;
3954                         }
3955                         else
3956                         {
3957                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3958                         }
3959                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3960                         totusers += Current->GetUserCount();
3961                         totservers++;
3962                         strlcpy(&matrix[line][depth],text,80);
3963                         line++;
3964                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3965                         {
3966                                 if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3967                                 {
3968                                         if (*user->oper)
3969                                         {
3970                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3971                                         }
3972                                 }
3973                                 else
3974                                 {
3975                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3976                                 }
3977                         }
3978                 }
3979         }
3980
3981         int HandleMotd(const char** parameters, int pcnt, userrec* user)
3982         {
3983                 if (pcnt > 0)
3984                 {
3985                         /* Remote MOTD, the server is within the 1st parameter */
3986                         std::deque<std::string> params;
3987                         params.push_back(parameters[0]);
3988
3989                         /* Send it out remotely, generate no reply yet */
3990                         TreeServer* s = FindServerMask(parameters[0]);
3991                         if (s)
3992                         {
3993                                 DoOneToOne(user->nick, "MOTD", params, s->GetName());
3994                         }
3995                         else
3996                         {
3997                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3998                         }
3999                         return 1;
4000                 }
4001                 return 0;
4002         }
4003
4004         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
4005         {
4006                 if (pcnt > 0)
4007                 {
4008                         /* Remote ADMIN, the server is within the 1st parameter */
4009                         std::deque<std::string> params;
4010                         params.push_back(parameters[0]);
4011
4012                         /* Send it out remotely, generate no reply yet */
4013                         TreeServer* s = FindServerMask(parameters[0]);
4014                         if (s)
4015                         {
4016                                 DoOneToOne(user->nick, "ADMIN", params, s->GetName());
4017                         }
4018                         else
4019                         {
4020                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4021                         }
4022                         return 1;
4023                 }
4024                 return 0;
4025         }
4026
4027         int HandleStats(const char** parameters, int pcnt, userrec* user)
4028         {
4029                 if (pcnt > 1)
4030                 {
4031                         /* Remote STATS, the server is within the 2nd parameter */
4032                         std::deque<std::string> params;
4033                         params.push_back(parameters[0]);
4034                         params.push_back(parameters[1]);
4035                         /* Send it out remotely, generate no reply yet */
4036                         TreeServer* s = FindServerMask(parameters[1]);
4037                         if (s)
4038                         {
4039                                 params[1] = s->GetName();
4040                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
4041                         }
4042                         else
4043                         {
4044                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4045                         }
4046                         return 1;
4047                 }
4048                 return 0;
4049         }
4050
4051         // Ok, prepare to be confused.
4052         // After much mulling over how to approach this, it struck me that
4053         // the 'usual' way of doing a /MAP isnt the best way. Instead of
4054         // keeping track of a ton of ascii characters, and line by line
4055         // under recursion working out where to place them using multiplications
4056         // and divisons, we instead render the map onto a backplane of characters
4057         // (a character matrix), then draw the branches as a series of "L" shapes
4058         // from the nodes. This is not only friendlier on CPU it uses less stack.
4059
4060         void HandleMap(const char** parameters, int pcnt, userrec* user)
4061         {
4062                 // This array represents a virtual screen which we will
4063                 // "scratch" draw to, as the console device of an irc
4064                 // client does not provide for a proper terminal.
4065                 float totusers = 0;
4066                 float totservers = 0;
4067                 char matrix[128][80];
4068                 for (unsigned int t = 0; t < 128; t++)
4069                 {
4070                         matrix[t][0] = '\0';
4071                 }
4072                 line = 0;
4073                 // The only recursive bit is called here.
4074                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
4075                 // Process each line one by one. The algorithm has a limit of
4076                 // 128 servers (which is far more than a spanning tree should have
4077                 // anyway, so we're ok). This limit can be raised simply by making
4078                 // the character matrix deeper, 128 rows taking 10k of memory.
4079                 for (int l = 1; l < line; l++)
4080                 {
4081                         // scan across the line looking for the start of the
4082                         // servername (the recursive part of the algorithm has placed
4083                         // the servers at indented positions depending on what they
4084                         // are related to)
4085                         int first_nonspace = 0;
4086                         while (matrix[l][first_nonspace] == ' ')
4087                         {
4088                                 first_nonspace++;
4089                         }
4090                         first_nonspace--;
4091                         // Draw the `- (corner) section: this may be overwritten by
4092                         // another L shape passing along the same vertical pane, becoming
4093                         // a |- (branch) section instead.
4094                         matrix[l][first_nonspace] = '-';
4095                         matrix[l][first_nonspace-1] = '`';
4096                         int l2 = l - 1;
4097                         // Draw upwards until we hit the parent server, causing possibly
4098                         // other corners (`-) to become branches (|-)
4099                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
4100                         {
4101                                 matrix[l2][first_nonspace-1] = '|';
4102                                 l2--;
4103                         }
4104                 }
4105                 // dump the whole lot to the user. This is the easy bit, honest.
4106                 for (int t = 0; t < line; t++)
4107                 {
4108                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4109                 }
4110                 float avg_users = totusers / totservers;
4111                 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);
4112         user->WriteServ("007 %s :End of /MAP",user->nick);
4113                 return;
4114         }
4115
4116         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4117         {
4118                 TreeServer* s = FindServerMask(parameters[0]);
4119                 if (s)
4120                 {
4121                         if (s == TreeRoot)
4122                         {
4123                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4124                                 return 1;
4125                         }
4126                         TreeSocket* sock = s->GetSocket();
4127                         if (sock)
4128                         {
4129                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4130                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4131                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
4132                                 ServerInstance->SE->DelFd(sock);
4133                                 sock->Close();
4134                                 delete sock;
4135                         }
4136                         else
4137                         {
4138                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
4139                         }
4140                 }
4141                 else
4142                 {
4143                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4144                 }
4145                 return 1;
4146         }
4147
4148         int HandleTime(const char** parameters, int pcnt, userrec* user)
4149         {
4150                 if ((IS_LOCAL(user)) && (pcnt))
4151                 {
4152                         TreeServer* found = FindServerMask(parameters[0]);
4153                         if (found)
4154                         {
4155                                 // we dont' override for local server
4156                                 if (found == TreeRoot)
4157                                         return 0;
4158
4159                                 std::deque<std::string> params;
4160                                 params.push_back(found->GetName());
4161                                 params.push_back(user->nick);
4162                                 DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4163                         }
4164                         else
4165                         {
4166                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4167                         }
4168                 }
4169                 return 1;
4170         }
4171
4172         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4173         {
4174                 if ((IS_LOCAL(user)) && (pcnt > 1))
4175                 {
4176                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4177                         if ((remote) && (remote->GetFd() < 0))
4178                         {
4179                                 std::deque<std::string> params;
4180                                 params.push_back(parameters[1]);
4181                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
4182                                 return 1;
4183                         }
4184                         else if (!remote)
4185                         {
4186                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4187                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4188                                 return 1;
4189                         }
4190                 }
4191                 return 0;
4192         }
4193
4194         void DoPingChecks(time_t curtime)
4195         {
4196                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
4197                 {
4198                         TreeServer* serv = TreeRoot->GetChild(j);
4199                         TreeSocket* sock = serv->GetSocket();
4200                         if (sock)
4201                         {
4202                                 if (curtime >= serv->NextPingTime())
4203                                 {
4204                                         if (serv->AnsweredLastPing())
4205                                         {
4206                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4207                                                 serv->SetNextPingTime(curtime + 60);
4208                                         }
4209                                         else
4210                                         {
4211                                                 // they didnt answer, boot them
4212                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4213                                                 sock->Squit(serv,"Ping timeout");
4214                                                 ServerInstance->SE->DelFd(sock);
4215                                                 sock->Close();
4216                                                 delete sock;
4217                                                 return;
4218                                         }
4219                                 }
4220                         }
4221                 }
4222         }
4223
4224         void ConnectServer(Link* x)
4225         {
4226                 insp_inaddr binip;
4227
4228                 /* Do we already have an IP? If so, no need to resolve it. */
4229                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4230                 {
4231                         TreeSocket* newsocket = new TreeSocket(ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4232                         if (newsocket->GetFd() > -1)
4233                         {
4234                                 /* Handled automatically on success */
4235                         }
4236                         else
4237                         {
4238                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4239                                 delete newsocket;
4240                                 this->DoFailOver(x);
4241                         }
4242                 }
4243                 else
4244                 {
4245                         try
4246                         {
4247                                 ServernameResolver* snr = new ServernameResolver(ServerInstance,x->IPAddr, *x);
4248                                 ServerInstance->AddResolver(snr);
4249                         }
4250                         catch (ModuleException& e)
4251                         {
4252                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4253                                 this->DoFailOver(x);
4254                         }
4255                 }
4256         }
4257
4258         void DoFailOver(Link* x)
4259         {
4260                 if (x->FailOver.length())
4261                 {
4262                         if (x->FailOver == x->Name)
4263                         {
4264                                 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());
4265                                 return;
4266                         }
4267                         Link* TryThisOne = this->FindLink(x->FailOver.c_str());
4268                         if (TryThisOne)
4269                         {
4270                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
4271                                 ConnectServer(TryThisOne);
4272                         }
4273                         else
4274                         {
4275                                 ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
4276                         }
4277                 }
4278         }
4279
4280         Link* FindLink(const std::string& name)
4281         {
4282                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4283                 {
4284                         if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
4285                         {
4286                                 return &(*x);
4287                         }
4288                 }
4289                 return NULL;
4290         }
4291
4292         void AutoConnectServers(time_t curtime)
4293         {
4294                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4295                 {
4296                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4297                         {
4298                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4299                                 x->NextConnectTime = curtime + x->AutoConnect;
4300                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4301                                 if (x->FailOver.length())
4302                                 {
4303                                         TreeServer* CheckFailOver = FindServer(x->FailOver.c_str());
4304                                         if (CheckFailOver)
4305                                         {
4306                                                 /* The failover for this server is currently a member of the network.
4307                                                  * The failover probably succeeded, where the main link did not.
4308                                                  * Don't try the main link until the failover is gone again.
4309                                                  */
4310                                                 continue;
4311                                         }
4312                                 }
4313                                 if (!CheckDupe)
4314                                 {
4315                                         // an autoconnected server is not connected. Check if its time to connect it
4316                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4317                                         this->ConnectServer(&(*x));
4318                                 }
4319                         }
4320                 }
4321         }
4322
4323         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4324         {
4325                 // we've already checked if pcnt > 0, so this is safe
4326                 TreeServer* found = FindServerMask(parameters[0]);
4327                 if (found)
4328                 {
4329                         std::string Version = found->GetVersion();
4330                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4331                         if (found == TreeRoot)
4332                         {
4333                                 std::stringstream out(ServerInstance->Config->data005);
4334                                 std::string token = "";
4335                                 std::string line5 = "";
4336                                 int token_counter = 0;
4337
4338                                 while (!out.eof())
4339                                 {
4340                                         out >> token;
4341                                         line5 = line5 + token + " ";
4342                                         token_counter++;
4343
4344                                         if ((token_counter >= 13) || (out.eof() == true))
4345                                         {
4346                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4347                                                 line5 = "";
4348                                                 token_counter = 0;
4349                                         }
4350                                 }
4351                         }
4352                 }
4353                 else
4354                 {
4355                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4356                 }
4357                 return 1;
4358         }
4359
4360         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4361         {
4362                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4363                 {
4364                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4365                         {
4366                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4367                                 if (!CheckDupe)
4368                                 {
4369                                         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);
4370                                         ConnectServer(&(*x));
4371                                         return 1;
4372                                 }
4373                                 else
4374                                 {
4375                                         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());
4376                                         return 1;
4377                                 }
4378                         }
4379                 }
4380                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4381                 return 1;
4382         }
4383
4384         virtual int OnStats(char statschar, userrec* user, string_list &results)
4385         {
4386                 if (statschar == 'c')
4387                 {
4388                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
4389                         {
4390                                 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');
4391                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
4392                         }
4393                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4394                         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);
4395                         return 1;
4396                 }
4397                 return 0;
4398         }
4399
4400         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4401         {
4402                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4403                 if (!validated)
4404                         return 0;
4405
4406                 if (command == "CONNECT")
4407                 {
4408                         return this->HandleConnect(parameters,pcnt,user);
4409                 }
4410                 else if (command == "STATS")
4411                 {
4412                         return this->HandleStats(parameters,pcnt,user);
4413                 }
4414                 else if (command == "MOTD")
4415                 {
4416                         return this->HandleMotd(parameters,pcnt,user);
4417                 }
4418                 else if (command == "ADMIN")
4419                 {
4420                         return this->HandleAdmin(parameters,pcnt,user);
4421                 }
4422                 else if (command == "SQUIT")
4423                 {
4424                         return this->HandleSquit(parameters,pcnt,user);
4425                 }
4426                 else if (command == "MAP")
4427                 {
4428                         this->HandleMap(parameters,pcnt,user);
4429                         return 1;
4430                 }
4431                 else if ((command == "TIME") && (pcnt > 0))
4432                 {
4433                         return this->HandleTime(parameters,pcnt,user);
4434                 }
4435                 else if (command == "LUSERS")
4436                 {
4437                         this->HandleLusers(parameters,pcnt,user);
4438                         return 1;
4439                 }
4440                 else if (command == "LINKS")
4441                 {
4442                         this->HandleLinks(parameters,pcnt,user);
4443                         return 1;
4444                 }
4445                 else if (command == "WHOIS")
4446                 {
4447                         if (pcnt > 1)
4448                         {
4449                                 // remote whois
4450                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4451                         }
4452                 }
4453                 else if ((command == "VERSION") && (pcnt > 0))
4454                 {
4455                         this->HandleVersion(parameters,pcnt,user);
4456                         return 1;
4457                 }
4458
4459                 return 0;
4460         }
4461
4462         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4463         {
4464                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4465                 {
4466                         // this bit of code cleverly routes all module commands
4467                         // to all remote severs *automatically* so that modules
4468                         // can just handle commands locally, without having
4469                         // to have any special provision in place for remote
4470                         // commands and linking protocols.
4471                         std::deque<std::string> params;
4472                         params.clear();
4473                         for (int j = 0; j < pcnt; j++)
4474                         {
4475                                 if (strchr(parameters[j],' '))
4476                                 {
4477                                         params.push_back(":" + std::string(parameters[j]));
4478                                 }
4479                                 else
4480                                 {
4481                                         params.push_back(std::string(parameters[j]));
4482                                 }
4483                         }
4484                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4485                         DoOneToMany(user->nick,command,params);
4486                 }
4487         }
4488
4489         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4490         {
4491                 TreeServer* s = FindServer(servername);
4492                 if (s)
4493                 {
4494                         description = s->GetDesc();
4495                 }
4496         }
4497
4498         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4499         {
4500                 if (IS_LOCAL(source))
4501                 {
4502                         std::deque<std::string> params;
4503                         params.push_back(dest->nick);
4504                         params.push_back(channel->name);
4505                         DoOneToMany(source->nick,"INVITE",params);
4506                 }
4507         }
4508
4509         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4510         {
4511                 std::deque<std::string> params;
4512                 params.push_back(chan->name);
4513                 params.push_back(":"+topic);
4514                 DoOneToMany(user->nick,"TOPIC",params);
4515         }
4516
4517         virtual void OnWallops(userrec* user, const std::string &text)
4518         {
4519                 if (IS_LOCAL(user))
4520                 {
4521                         std::deque<std::string> params;
4522                         params.push_back(":"+text);
4523                         DoOneToMany(user->nick,"WALLOPS",params);
4524                 }
4525         }
4526
4527         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4528         {
4529                 if (target_type == TYPE_USER)
4530                 {
4531                         userrec* d = (userrec*)dest;
4532                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4533                         {
4534                                 std::deque<std::string> params;
4535                                 params.clear();
4536                                 params.push_back(d->nick);
4537                                 params.push_back(":"+text);
4538                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4539                         }
4540                 }
4541                 else if (target_type == TYPE_CHANNEL)
4542                 {
4543                         if (IS_LOCAL(user))
4544                         {
4545                                 chanrec *c = (chanrec*)dest;
4546                                 if (c)
4547                                 {
4548                                         std::string cname = c->name;
4549                                         if (status)
4550                                                 cname = status + cname;
4551                                         std::deque<TreeServer*> list;
4552                                         GetListOfServersForChannel(c,list);
4553                                         unsigned int ucount = list.size();
4554                                         for (unsigned int i = 0; i < ucount; i++)
4555                                         {
4556                                                 TreeSocket* Sock = list[i]->GetSocket();
4557                                                 if (Sock)
4558                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4559                                         }
4560                                 }
4561                         }
4562                 }
4563                 else if (target_type == TYPE_SERVER)
4564                 {
4565                         if (IS_LOCAL(user))
4566                         {
4567                                 char* target = (char*)dest;
4568                                 std::deque<std::string> par;
4569                                 par.push_back(target);
4570                                 par.push_back(":"+text);
4571                                 DoOneToMany(user->nick,"NOTICE",par);
4572                         }
4573                 }
4574         }
4575
4576         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4577         {
4578                 if (target_type == TYPE_USER)
4579                 {
4580                         // route private messages which are targetted at clients only to the server
4581                         // which needs to receive them
4582                         userrec* d = (userrec*)dest;
4583                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4584                         {
4585                                 std::deque<std::string> params;
4586                                 params.clear();
4587                                 params.push_back(d->nick);
4588                                 params.push_back(":"+text);
4589                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4590                         }
4591                 }
4592                 else if (target_type == TYPE_CHANNEL)
4593                 {
4594                         if (IS_LOCAL(user))
4595                         {
4596                                 chanrec *c = (chanrec*)dest;
4597                                 if (c)
4598                                 {
4599                                         std::string cname = c->name;
4600                                         if (status)
4601                                                 cname = status + cname;
4602                                         std::deque<TreeServer*> list;
4603                                         GetListOfServersForChannel(c,list);
4604                                         unsigned int ucount = list.size();
4605                                         for (unsigned int i = 0; i < ucount; i++)
4606                                         {
4607                                                 TreeSocket* Sock = list[i]->GetSocket();
4608                                                 if (Sock)
4609                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4610                                         }
4611                                 }
4612                         }
4613                 }
4614                 else if (target_type == TYPE_SERVER)
4615                 {
4616                         if (IS_LOCAL(user))
4617                         {
4618                                 char* target = (char*)dest;
4619                                 std::deque<std::string> par;
4620                                 par.push_back(target);
4621                                 par.push_back(":"+text);
4622                                 DoOneToMany(user->nick,"PRIVMSG",par);
4623                         }
4624                 }
4625         }
4626
4627         virtual void OnBackgroundTimer(time_t curtime)
4628         {
4629                 AutoConnectServers(curtime);
4630                 DoPingChecks(curtime);
4631         }
4632
4633         virtual void OnUserJoin(userrec* user, chanrec* channel)
4634         {
4635                 // Only do this for local users
4636                 if (IS_LOCAL(user))
4637                 {
4638                         std::deque<std::string> params;
4639                         params.clear();
4640                         params.push_back(channel->name);
4641                         // set up their permissions and the channel TS with FJOIN.
4642                         // All users are FJOINed now, because a module may specify
4643                         // new joining permissions for the user.
4644                         params.clear();
4645                         params.push_back(channel->name);
4646                         params.push_back(ConvToStr(channel->age));
4647                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4648                         DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4649                 }
4650         }
4651
4652         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4653         {
4654                 // only occurs for local clients
4655                 if (user->registered != REG_ALL)
4656                         return;
4657                 std::deque<std::string> params;
4658                 params.push_back(newhost);
4659                 DoOneToMany(user->nick,"FHOST",params);
4660         }
4661
4662         virtual void OnChangeName(userrec* user, const std::string &gecos)
4663         {
4664                 // only occurs for local clients
4665                 if (user->registered != REG_ALL)
4666                         return;
4667                 std::deque<std::string> params;
4668                 params.push_back(gecos);
4669                 DoOneToMany(user->nick,"FNAME",params);
4670         }
4671
4672         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4673         {
4674                 if (IS_LOCAL(user))
4675                 {
4676                         std::deque<std::string> params;
4677                         params.push_back(channel->name);
4678                         if (partmessage != "")
4679                                 params.push_back(":"+partmessage);
4680                         DoOneToMany(user->nick,"PART",params);
4681                 }
4682         }
4683
4684         virtual void OnUserConnect(userrec* user)
4685         {
4686                 char agestr[MAXBUF];
4687                 if (IS_LOCAL(user))
4688                 {
4689                         std::deque<std::string> params;
4690                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4691                         params.push_back(agestr);
4692                         params.push_back(user->nick);
4693                         params.push_back(user->host);
4694                         params.push_back(user->dhost);
4695                         params.push_back(user->ident);
4696                         params.push_back("+"+std::string(user->FormatModes()));
4697                         params.push_back(user->GetIPString());
4698                         params.push_back(":"+std::string(user->fullname));
4699                         DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4700
4701                         // User is Local, change needs to be reflected!
4702                         TreeServer* SourceServer = FindServer(user->server);
4703                         if (SourceServer)
4704                         {
4705                                 SourceServer->AddUserCount();
4706                         }
4707
4708                 }
4709         }
4710
4711         virtual void OnUserQuit(userrec* user, const std::string &reason)
4712         {
4713                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4714                 {
4715                         std::deque<std::string> params;
4716                         params.push_back(":"+reason);
4717                         DoOneToMany(user->nick,"QUIT",params);
4718                 }
4719                 // Regardless, We need to modify the user Counts..
4720                 TreeServer* SourceServer = FindServer(user->server);
4721                 if (SourceServer)
4722                 {
4723                         SourceServer->DelUserCount();
4724                 }
4725
4726         }
4727
4728         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4729         {
4730                 if (IS_LOCAL(user))
4731                 {
4732                         std::deque<std::string> params;
4733                         params.push_back(user->nick);
4734                         DoOneToMany(oldnick,"NICK",params);
4735                 }
4736         }
4737
4738         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4739         {
4740                 if ((source) && (IS_LOCAL(source)))
4741                 {
4742                         std::deque<std::string> params;
4743                         params.push_back(chan->name);
4744                         params.push_back(user->nick);
4745                         params.push_back(":"+reason);
4746                         DoOneToMany(source->nick,"KICK",params);
4747                 }
4748                 else if (!source)
4749                 {
4750                         std::deque<std::string> params;
4751                         params.push_back(chan->name);
4752                         params.push_back(user->nick);
4753                         params.push_back(":"+reason);
4754                         DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4755                 }
4756         }
4757
4758         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4759         {
4760                 std::deque<std::string> params;
4761                 params.push_back(dest->nick);
4762                 params.push_back(":"+reason);
4763                 DoOneToMany(source->nick,"KILL",params);
4764         }
4765
4766         virtual void OnRehash(const std::string &parameter)
4767         {
4768                 if (parameter != "")
4769                 {
4770                         std::deque<std::string> params;
4771                         params.push_back(parameter);
4772                         DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4773                         // check for self
4774                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4775                         {
4776                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4777                                 ServerInstance->RehashServer();
4778                         }
4779                 }
4780                 ReadConfiguration(false);
4781         }
4782
4783         // note: the protocol does not allow direct umode +o except
4784         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4785         // locally.
4786         virtual void OnOper(userrec* user, const std::string &opertype)
4787         {
4788                 if (IS_LOCAL(user))
4789                 {
4790                         std::deque<std::string> params;
4791                         params.push_back(opertype);
4792                         DoOneToMany(user->nick,"OPERTYPE",params);
4793                 }
4794         }
4795
4796         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4797         {
4798                 if (IS_LOCAL(source))
4799                 {
4800                         char type[8];
4801                         snprintf(type,8,"%cLINE",linetype);
4802                         std::string stype = type;
4803                         if (adding)
4804                         {
4805                                 char sduration[MAXBUF];
4806                                 snprintf(sduration,MAXBUF,"%ld",duration);
4807                                 std::deque<std::string> params;
4808                                 params.push_back(host);
4809                                 params.push_back(sduration);
4810                                 params.push_back(":"+reason);
4811                                 DoOneToMany(source->nick,stype,params);
4812                         }
4813                         else
4814                         {
4815                                 std::deque<std::string> params;
4816                                 params.push_back(host);
4817                                 DoOneToMany(source->nick,stype,params);
4818                         }
4819                 }
4820         }
4821
4822         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4823         {
4824                 OnLine(source,hostmask,true,'G',duration,reason);
4825         }
4826
4827         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4828         {
4829                 OnLine(source,ipmask,true,'Z',duration,reason);
4830         }
4831
4832         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4833         {
4834                 OnLine(source,nickmask,true,'Q',duration,reason);
4835         }
4836
4837         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4838         {
4839                 OnLine(source,hostmask,true,'E',duration,reason);
4840         }
4841
4842         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4843         {
4844                 OnLine(source,hostmask,false,'G',0,"");
4845         }
4846
4847         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4848         {
4849                 OnLine(source,ipmask,false,'Z',0,"");
4850         }
4851
4852         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4853         {
4854                 OnLine(source,nickmask,false,'Q',0,"");
4855         }
4856
4857         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4858         {
4859                 OnLine(source,hostmask,false,'E',0,"");
4860         }
4861
4862         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4863         {
4864                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4865                 {
4866                         if (target_type == TYPE_USER)
4867                         {
4868                                 userrec* u = (userrec*)dest;
4869                                 std::deque<std::string> params;
4870                                 params.push_back(u->nick);
4871                                 params.push_back(text);
4872                                 DoOneToMany(user->nick,"MODE",params);
4873                         }
4874                         else
4875                         {
4876                                 chanrec* c = (chanrec*)dest;
4877                                 std::deque<std::string> params;
4878                                 params.push_back(c->name);
4879                                 params.push_back(text);
4880                                 DoOneToMany(user->nick,"MODE",params);
4881                         }
4882                 }
4883         }
4884
4885         virtual void OnSetAway(userrec* user)
4886         {
4887                 if (IS_LOCAL(user))
4888                 {
4889                         std::deque<std::string> params;
4890                         params.push_back(":"+std::string(user->awaymsg));
4891                         DoOneToMany(user->nick,"AWAY",params);
4892                 }
4893         }
4894
4895         virtual void OnCancelAway(userrec* user)
4896         {
4897                 if (IS_LOCAL(user))
4898                 {
4899                         std::deque<std::string> params;
4900                         params.clear();
4901                         DoOneToMany(user->nick,"AWAY",params);
4902                 }
4903         }
4904
4905         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4906         {
4907                 TreeSocket* s = (TreeSocket*)opaque;
4908                 if (target)
4909                 {
4910                         if (target_type == TYPE_USER)
4911                         {
4912                                 userrec* u = (userrec*)target;
4913                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4914                         }
4915                         else
4916                         {
4917                                 chanrec* c = (chanrec*)target;
4918                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4919                         }
4920                 }
4921         }
4922
4923         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4924         {
4925                 TreeSocket* s = (TreeSocket*)opaque;
4926                 if (target)
4927                 {
4928                         if (target_type == TYPE_USER)
4929                         {
4930                                 userrec* u = (userrec*)target;
4931                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4932                         }
4933                         else if (target_type == TYPE_OTHER)
4934                         {
4935                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4936                         }
4937                         else if (target_type == TYPE_CHANNEL)
4938                         {
4939                                 chanrec* c = (chanrec*)target;
4940                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4941                         }
4942                 }
4943         }
4944
4945         virtual void OnEvent(Event* event)
4946         {
4947                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4948
4949                 if (event->GetEventID() == "send_metadata")
4950                 {
4951                         if (params->size() < 3)
4952                                 return;
4953                         (*params)[2] = ":" + (*params)[2];
4954                         DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4955                 }
4956                 else if (event->GetEventID() == "send_topic")
4957                 {
4958                         if (params->size() < 2)
4959                                 return;
4960                         (*params)[1] = ":" + (*params)[1];
4961                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
4962                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time()));
4963                         DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
4964                 }
4965                 else if (event->GetEventID() == "send_mode")
4966                 {
4967                         if (params->size() < 2)
4968                                 return;
4969                         // Insert the TS value of the object, either userrec or chanrec
4970                         time_t ourTS = 0;
4971                         userrec* a = ServerInstance->FindNick((*params)[0]);
4972                         if (a)
4973                         {
4974                                 ourTS = a->age;
4975                         }
4976                         else
4977                         {
4978                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4979                                 if (a)
4980                                 {
4981                                         ourTS = a->age;
4982                                 }
4983                         }
4984                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4985                         DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4986                 }
4987         }
4988
4989         virtual ~ModuleSpanningTree()
4990         {
4991         }
4992
4993         virtual Version GetVersion()
4994         {
4995                 return Version(1,1,0,2,VF_STATIC|VF_VENDOR,API_VERSION);
4996         }
4997
4998         void Implements(char* List)
4999         {
5000                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
5001                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
5002                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
5003                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
5004                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
5005                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
5006                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
5007         }
5008
5009         /* It is IMPORTANT that m_spanningtree is the last module in the chain
5010          * so that any activity it sees is FINAL, e.g. we arent going to send out
5011          * a NICK message before m_cloaking has finished putting the +x on the user,
5012          * etc etc.
5013          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
5014          * the module call queue.
5015          */
5016         Priority Prioritize()
5017         {
5018                 return PRIORITY_LAST;
5019         }
5020 };
5021
5022 void DoFailOver(Link* x)
5023 {
5024         TreeProtocolModule->DoFailOver(x);
5025 }
5026
5027 Link* FindLink(const std::string& name)
5028 {
5029         return TreeProtocolModule->FindLink(name);
5030 }
5031
5032 class ModuleSpanningTreeFactory : public ModuleFactory
5033 {
5034  public:
5035         ModuleSpanningTreeFactory()
5036         {
5037         }
5038
5039         ~ModuleSpanningTreeFactory()
5040         {
5041         }
5042
5043         virtual Module * CreateModule(InspIRCd* Me)
5044         {
5045                 TreeProtocolModule = new ModuleSpanningTree(Me);
5046                 return TreeProtocolModule;
5047         }
5048
5049 };
5050
5051
5052 extern "C" void * init_module( void )
5053 {
5054         return new ModuleSpanningTreeFactory;
5055 }