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