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 "socket.h"
  34 #include "helperfuncs.h"
  35 #include "inspircd.h"
  36 #include "inspstring.h"
  37 #include "hashcomp.h"
  38 #include "message.h"
  39 #include "xline.h"
  40 #include "typedefs.h"
  41 #include "cull_list.h"
  42 #include "aes.h"
  43
  44 #ifdef GCC3
  45 #define nspace __gnu_cxx
  46 #else
  47 #define nspace std
  48 #endif
  49
  50 /*
  51  * The server list in InspIRCd is maintained as two structures
  52  * which hold the data in different ways. Most of the time, we
  53  * want to very quicky obtain three pieces of information:
  54  *
  55  * (1) The information on a server
  56  * (2) The information on the server we must send data through
  57  *     to actually REACH the server we're after
  58  * (3) Potentially, the child/parent objects of this server
  59  *
  60  * The InspIRCd spanning protocol provides easy access to these
  61  * by storing the data firstly in a recursive structure, where
  62  * each item references its parent item, and a dynamic list
  63  * of child items, and another structure which stores the items
  64  * hashed, linearly. This means that if we want to find a server
  65  * by name quickly, we can look it up in the hash, avoiding
  66  * any O(n) lookups. If however, during a split or sync, we want
  67  * to apply an operation to a server, and any of its child objects
  68  * we can resort to recursion to walk the tree structure.
  69  */
  70
  71 class ModuleSpanningTree;
  72 static ModuleSpanningTree* TreeProtocolModule;
  73
  74 extern ServerConfig* Config;
  75 extern InspIRCd* ServerInstance;
  76 extern std::vector<Module*> modules;
  77 extern std::vector<ircd_module*> factory;
  78 extern int MODCOUNT;
  79
  80 /* Any socket can have one of five states at any one time.
  81  * The LISTENER state indicates a socket which is listening
  82  * for connections. It cannot receive data itself, only incoming
  83  * sockets.
  84  * The CONNECTING state indicates an outbound socket which is
  85  * waiting to be writeable.
  86  * The WAIT_AUTH_1 state indicates the socket is outbound and
  87  * has successfully connected, but has not yet sent and received
  88  * SERVER strings.
  89  * The WAIT_AUTH_2 state indicates that the socket is inbound
  90  * (allocated by a LISTENER) but has not yet sent and received
  91  * SERVER strings.
  92  * The CONNECTED state represents a fully authorized, fully
  93  * connected server.
  94  */
  95 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  96
  97 /* We need to import these from the core for use in netbursts */
  98 extern user_hash clientlist;
  99 extern chan_hash chanlist;
 100
 101 /* Foward declarations */
 102 class TreeServer;
 103 class TreeSocket;
 104
 105 /* This variable represents the root of the server tree
 106  * (for all intents and purposes, it's us)
 107  */
 108 TreeServer *TreeRoot;
 109
 110 static Server* Srv;
 111
 112 /* This hash_map holds the hash equivalent of the server
 113  * tree, used for rapid linear lookups.
 114  */
 115 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
 116 server_hash serverlist;
 117
 118 /* More forward declarations */
 119 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 120 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 121 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 122 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 123 void ReadConfiguration(bool rebind);
 124
 125 /* Flatten links and /MAP for non-opers */
 126 bool FlatLinks;
 127 /* Hide U-Lined servers in /MAP and /LINKS */
 128 bool HideULines;
 129
 130 /* Imported from xline.cpp for use during netburst */
 131 extern std::vector<KLine> klines;
 132 extern std::vector<GLine> glines;
 133 extern std::vector<ZLine> zlines;
 134 extern std::vector<QLine> qlines;
 135 extern std::vector<ELine> elines;
 136 extern std::vector<KLine> pklines;
 137 extern std::vector<GLine> pglines;
 138 extern std::vector<ZLine> pzlines;
 139 extern std::vector<QLine> pqlines;
 140 extern std::vector<ELine> pelines;
 141
 142 /* Each server in the tree is represented by one class of
 143  * type TreeServer. A locally connected TreeServer can
 144  * have a class of type TreeSocket associated with it, for
 145  * remote servers, the TreeSocket entry will be NULL.
 146  * Each server also maintains a pointer to its parent
 147  * (NULL if this server is ours, at the top of the tree)
 148  * and a pointer to its "Route" (see the comments in the
 149  * constructors below), and also a dynamic list of pointers
 150  * to its children which can be iterated recursively
 151  * if required. Creating or deleting objects of type
 152  i* TreeServer automatically maintains the hash_map of
 153  * TreeServer items, deleting and inserting them as they
 154  * are created and destroyed.
 155  */
 156
 157 class TreeServer
 158 {
 159         TreeServer* Parent;                     /* Parent entry */
 160         TreeServer* Route;                      /* Route entry */
 161         std::vector<TreeServer*> Children;      /* List of child objects */
 162         irc::string ServerName;                 /* Server's name */
 163         std::string ServerDesc;                 /* Server's description */
 164         std::string VersionString;              /* Version string or empty string */
 165         int UserCount;                          /* Not used in this version */
 166         int OperCount;                          /* Not used in this version */
 167         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 168         time_t NextPing;                        /* After this time, the server should be PINGed*/
 169         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 170         std::map<userrec*,userrec*> Users;      /* Users on this server */
 171         bool DontModifyHash;                    /* When the server is splitting, this is set to true so we dont bash our own iterator to death */
 172
 173  public:
 174
 175         /* We don't use this constructor. Its a dummy, and won't cause any insertion
 176          * of the TreeServer into the hash_map. See below for the two we DO use.
 177          */
 178         TreeServer()
 179         {
 180                 Parent = NULL;
 181                 ServerName = "";
 182                 ServerDesc = "";
 183                 VersionString = "";
 184                 UserCount = OperCount = 0;
 185                 VersionString = Srv->GetVersion();
 186                 DontModifyHash = false;
 187         }
 188
 189         /* We use this constructor only to create the 'root' item, TreeRoot, which
 190          * represents our own server. Therefore, it has no route, no parent, and
 191          * no socket associated with it. Its version string is our own local version.
 192          */
 193         TreeServer(std::string Name, std::string Desc) : ServerName(Name.c_str()), ServerDesc(Desc)
 194         {
 195                 Parent = NULL;
 196                 VersionString = "";
 197                 UserCount = OperCount = 0;
 198                 VersionString = Srv->GetVersion();
 199                 Route = NULL;
 200                 Socket = NULL; /* Fix by brain */
 201                 DontModifyHash = false;
 202                 AddHashEntry();
 203         }
 204
 205         /* When we create a new server, we call this constructor to initialize it.
 206          * This constructor initializes the server's Route and Parent, and sets up
 207          * its ping counters so that it will be pinged one minute from now.
 208          */
 209         TreeServer(std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) : Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 210         {
 211                 VersionString = "";
 212                 UserCount = OperCount = 0;
 213                 DontModifyHash = false;
 214                 this->SetNextPingTime(time(NULL) + 120);
 215                 this->SetPingFlag();
 216
 217                 /* find the 'route' for this server (e.g. the one directly connected
 218                  * to the local server, which we can use to reach it)
 219                  *
 220                  * In the following example, consider we have just added a TreeServer
 221                  * class for server G on our network, of which we are server A.
 222                  * To route traffic to G (marked with a *) we must send the data to
 223                  * B (marked with a +) so this algorithm initializes the 'Route'
 224                  * value to point at whichever server traffic must be routed through
 225                  * to get here. If we were to try this algorithm with server B,
 226                  * the Route pointer would point at its own object ('this').
 227                  *
 228                  *              A
 229                  *             / \
 230                  *          + B   C
 231                  *           / \   \
 232                  *          D   E   F
 233                  *         /         \
 234                  *      * G           H
 235                  *
 236                  * We only run this algorithm when a server is created, as
 237                  * the routes remain constant while ever the server exists, and
 238                  * do not need to be re-calculated.
 239                  */
 240
 241                 Route = Above;
 242                 if (Route == TreeRoot)
 243                 {
 244                         Route = this;
 245                 }
 246                 else
 247                 {
 248                         while (this->Route->GetParent() != TreeRoot)
 249                         {
 250                                 this->Route = Route->GetParent();
 251                         }
 252                 }
 253
 254                 /* Because recursive code is slow and takes a lot of resources,
 255                  * we store two representations of the server tree. The first
 256                  * is a recursive structure where each server references its
 257                  * children and its parent, which is used for netbursts and
 258                  * netsplits to dump the whole dataset to the other server,
 259                  * and the second is used for very fast lookups when routing
 260                  * messages and is instead a hash_map, where each item can
 261                  * be referenced by its server name. The AddHashEntry()
 262                  * call below automatically inserts each TreeServer class
 263                  * into the hash_map as it is created. There is a similar
 264                  * maintainance call in the destructor to tidy up deleted
 265                  * servers.
 266                  */
 267
 268                 this->AddHashEntry();
 269         }
 270
 271         void AddUser(userrec* user)
 272         {
 273                 if (this->DontModifyHash)
 274                 {
 275                         log(DEBUG,"Not modifying hash");
 276                         return;
 277                 }
 278
 279                 log(DEBUG,"Add user %s to server %s",user->nick,this->ServerName.c_str());
 280                 std::map<userrec*,userrec*>::iterator iter;
 281                 iter = Users.find(user);
 282                 if (iter == Users.end())
 283                         Users[user] = user;
 284         }
 285
 286         void DelUser(userrec* user)
 287         {
 288                 /* FIX BY BRAIN:
 289                  * Quitting the user in QuitUsers changes the hash by removing the user here,
 290                  * corrupting the iterator!
 291                  * When netsplitting, this->DontModifyHash is set to prevent it now!
 292                  */
 293                 if (this->DontModifyHash)
 294                 {
 295                         log(DEBUG,"Not modifying hash");
 296                         return;
 297                 }
 298
 299                 log(DEBUG,"Remove user %s from server %s",user->nick,this->ServerName.c_str());
 300                 std::map<userrec*,userrec*>::iterator iter;
 301                 iter = Users.find(user);
 302                 if (iter != Users.end())
 303                         Users.erase(iter);
 304         }
 305
 306         int QuitUsers(const std::string &reason)
 307         {
 308                 int x = Users.size();
 309                 log(DEBUG,"Removing %d users from server %s",x,this->ServerName.c_str());
 310                 const char* reason_s = reason.c_str();
 311                 this->DontModifyHash = true;
 312                 for (std::map<userrec*,userrec*>::iterator n = Users.begin(); n != Users.end(); n++)
 313                 {
 314                         log(DEBUG,"Kill %s fd=%d",n->second->nick,n->second->fd);
 315                         if (!IS_LOCAL(n->second))
 316                                 kill_link(n->second,reason_s);
 317                 }
 318                 Users.clear();
 319                 this->DontModifyHash = false;
 320                 return x;
 321         }
 322
 323         /* This method is used to add the structure to the
 324          * hash_map for linear searches. It is only called
 325          * by the constructors.
 326          */
 327         void AddHashEntry()
 328         {
 329                 server_hash::iterator iter;
 330                 iter = serverlist.find(this->ServerName.c_str());
 331                 if (iter == serverlist.end())
 332                         serverlist[this->ServerName.c_str()] = this;
 333         }
 334
 335         /* This method removes the reference to this object
 336          * from the hash_map which is used for linear searches.
 337          * It is only called by the default destructor.
 338          */
 339         void DelHashEntry()
 340         {
 341                 server_hash::iterator iter;
 342                 iter = serverlist.find(this->ServerName.c_str());
 343                 if (iter != serverlist.end())
 344                         serverlist.erase(iter);
 345         }
 346
 347         /* These accessors etc should be pretty self-
 348          * explanitory.
 349          */
 350
 351         TreeServer* GetRoute()
 352         {
 353                 return Route;
 354         }
 355
 356         std::string GetName()
 357         {
 358                 return ServerName.c_str();
 359         }
 360
 361         std::string GetDesc()
 362         {
 363                 return ServerDesc;
 364         }
 365
 366         std::string GetVersion()
 367         {
 368                 return VersionString;
 369         }
 370
 371         void SetNextPingTime(time_t t)
 372         {
 373                 this->NextPing = t;
 374                 LastPingWasGood = false;
 375         }
 376
 377         time_t NextPingTime()
 378         {
 379                 return NextPing;
 380         }
 381
 382         bool AnsweredLastPing()
 383         {
 384                 return LastPingWasGood;
 385         }
 386
 387         void SetPingFlag()
 388         {
 389                 LastPingWasGood = true;
 390         }
 391
 392         int GetUserCount()
 393         {
 394                 return UserCount;
 395         }
 396
 397         void AddUserCount()
 398         {
 399                 UserCount++;
 400         }
 401
 402         void DelUserCount()
 403         {
 404                 UserCount--;
 405         }
 406
 407         int GetOperCount()
 408         {
 409                 return OperCount;
 410         }
 411
 412         TreeSocket* GetSocket()
 413         {
 414                 return Socket;
 415         }
 416
 417         TreeServer* GetParent()
 418         {
 419                 return Parent;
 420         }
 421
 422         void SetVersion(std::string Version)
 423         {
 424                 VersionString = Version;
 425         }
 426
 427         unsigned int ChildCount()
 428         {
 429                 return Children.size();
 430         }
 431
 432         TreeServer* GetChild(unsigned int n)
 433         {
 434                 if (n < Children.size())
 435                 {
 436                         /* Make sure they  cant request
 437                          * an out-of-range object. After
 438                          * all we know what these programmer
 439                          * types are like *grin*.
 440                          */
 441                         return Children[n];
 442                 }
 443                 else
 444                 {
 445                         return NULL;
 446                 }
 447         }
 448
 449         void AddChild(TreeServer* Child)
 450         {
 451                 Children.push_back(Child);
 452         }
 453
 454         bool DelChild(TreeServer* Child)
 455         {
 456                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 457                 {
 458                         if (*a == Child)
 459                         {
 460                                 Children.erase(a);
 461                                 return true;
 462                         }
 463                 }
 464                 return false;
 465         }
 466
 467         /* Removes child nodes of this node, and of that node, etc etc.
 468          * This is used during netsplits to automatically tidy up the
 469          * server tree. It is slow, we don't use it for much else.
 470          */
 471         bool Tidy()
 472         {
 473                 bool stillchildren = true;
 474                 while (stillchildren)
 475                 {
 476                         stillchildren = false;
 477                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 478                         {
 479                                 TreeServer* s = (TreeServer*)*a;
 480                                 s->Tidy();
 481                                 Children.erase(a);
 482                                 DELETE(s);
 483                                 stillchildren = true;
 484                                 break;
 485                         }
 486                 }
 487                 return true;
 488         }
 489
 490         ~TreeServer()
 491         {
 492                 /* We'd better tidy up after ourselves, eh? */
 493                 this->DelHashEntry();
 494         }
 495 };
 496
 497 /* The Link class might as well be a struct,
 498  * but this is C++ and we don't believe in structs (!).
 499  * It holds the entire information of one <link>
 500  * tag from the main config file. We maintain a list
 501  * of them, and populate the list on rehash/load.
 502  */
 503
 504 class Link
 505 {
 506  public:
 507          irc::string Name;
 508          std::string IPAddr;
 509          int Port;
 510          std::string SendPass;
 511          std::string RecvPass;
 512          unsigned long AutoConnect;
 513          time_t NextConnectTime;
 514          std::string EncryptionKey;
 515          bool HiddenFromStats;
 516 };
 517
 518 /* The usual stuff for inspircd modules,
 519  * plus the vector of Link classes which we
 520  * use to store the <link> tags from the config
 521  * file.
 522  */
 523 ConfigReader *Conf;
 524 std::vector<Link> LinkBlocks;
 525
 526 /* Yay for fast searches!
 527  * This is hundreds of times faster than recursion
 528  * or even scanning a linked list, especially when
 529  * there are more than a few servers to deal with.
 530  * (read as: lots).
 531  */
 532 TreeServer* FindServer(std::string ServerName)
 533 {
 534         server_hash::iterator iter;
 535         iter = serverlist.find(ServerName.c_str());
 536         if (iter != serverlist.end())
 537         {
 538                 return iter->second;
 539         }
 540         else
 541         {
 542                 return NULL;
 543         }
 544 }
 545
 546 /* Returns the locally connected server we must route a
 547  * message through to reach server 'ServerName'. This
 548  * only applies to one-to-one and not one-to-many routing.
 549  * See the comments for the constructor of TreeServer
 550  * for more details.
 551  */
 552 TreeServer* BestRouteTo(std::string ServerName)
 553 {
 554         if (ServerName.c_str() == TreeRoot->GetName())
 555                 return NULL;
 556         TreeServer* Found = FindServer(ServerName);
 557         if (Found)
 558         {
 559                 return Found->GetRoute();
 560         }
 561         else
 562         {
 563                 return NULL;
 564         }
 565 }
 566
 567 /* Find the first server matching a given glob mask.
 568  * Theres no find-using-glob method of hash_map [awwww :-(]
 569  * so instead, we iterate over the list using an iterator
 570  * and match each one until we get a hit. Yes its slow,
 571  * deal with it.
 572  */
 573 TreeServer* FindServerMask(std::string ServerName)
 574 {
 575         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 576         {
 577                 if (Srv->MatchText(i->first.c_str(),ServerName))
 578                         return i->second;
 579         }
 580         return NULL;
 581 }
 582
 583 /* A convenient wrapper that returns true if a server exists */
 584 bool IsServer(std::string ServerName)
 585 {
 586         return (FindServer(ServerName) != NULL);
 587 }
 588
 589
 590 class cmd_rconnect : public command_t
 591 {
 592         Module* Creator;
 593  public:
 594         cmd_rconnect (Module* Callback) : command_t("RCONNECT", 'o', 2), Creator(Callback)
 595         {
 596                 this->source = "m_spanningtree.so";
 597         }
 598
 599         void Handle (char **parameters, int pcnt, userrec *user)
 600         {
 601                 WriteServ(user->fd,"NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 602                 /* Is this aimed at our server? */
 603                 if (Srv->MatchText(Srv->GetServerName(),parameters[0]))
 604                 {
 605                         /* Yes, initiate the given connect */
 606                         WriteOpers("*** Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 607                         char* para[1];
 608                         para[0] = parameters[1];
 609                         Creator->OnPreCommand("CONNECT", para, 1, user, true);
 610                 }
 611         }
 612 };
 613
 614
 615
 616 /* Every SERVER connection inbound or outbound is represented by
 617  * an object of type TreeSocket.
 618  * TreeSockets, being inherited from InspSocket, can be tied into
 619  * the core socket engine, and we cn therefore receive activity events
 620  * for them, just like activex objects on speed. (yes really, that
 621  * is a technical term!) Each of these which relates to a locally
 622  * connected server is assocated with it, by hooking it onto a
 623  * TreeSocket class using its constructor. In this way, we can
 624  * maintain a list of servers, some of which are directly connected,
 625  * some of which are not.
 626  */
 627
 628 class TreeSocket : public InspSocket
 629 {
 630         std::string myhost;
 631         std::string in_buffer;
 632         ServerState LinkState;
 633         std::string InboundServerName;
 634         std::string InboundDescription;
 635         int num_lost_users;
 636         int num_lost_servers;
 637         time_t NextPing;
 638         bool LastPingWasGood;
 639         bool bursting;
 640         AES* ctx_in;
 641         AES* ctx_out;
 642         unsigned int keylength;
 643
 644  public:
 645
 646         /* Because most of the I/O gubbins are encapsulated within
 647          * InspSocket, we just call the superclass constructor for
 648          * most of the action, and append a few of our own values
 649          * to it.
 650          */
 651         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 652                 : InspSocket(host, port, listening, maxtime)
 653         {
 654                 myhost = host;
 655                 this->LinkState = LISTENER;
 656                 this->ctx_in = NULL;
 657                 this->ctx_out = NULL;
 658         }
 659
 660         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 661                 : InspSocket(host, port, listening, maxtime)
 662         {
 663                 myhost = ServerName;
 664                 this->LinkState = CONNECTING;
 665                 this->ctx_in = NULL;
 666                 this->ctx_out = NULL;
 667         }
 668
 669         /* When a listening socket gives us a new file descriptor,
 670          * we must associate it with a socket without creating a new
 671          * connection. This constructor is used for this purpose.
 672          */
 673         TreeSocket(int newfd, char* ip)
 674                 : InspSocket(newfd, ip)
 675         {
 676                 this->LinkState = WAIT_AUTH_1;
 677                 this->ctx_in = NULL;
 678                 this->ctx_out = NULL;
 679                 this->SendCapabilities();
 680         }
 681
 682         ~TreeSocket()
 683         {
 684                 if (ctx_in)
 685                         DELETE(ctx_in);
 686                 if (ctx_out)
 687                         DELETE(ctx_out);
 688         }
 689
 690         void InitAES(std::string key,std::string SName)
 691         {
 692                 if (key == "")
 693                         return;
 694
 695                 ctx_in = new AES();
 696                 ctx_out = new AES();
 697                 log(DEBUG,"Initialized AES key %s",key.c_str());
 698                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 699                 keylength = key.length();
 700                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 701                 {
 702                         WriteOpers("*** \2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 703                         log(DEBUG,"Key length not 16, 24 or 32 characters!");
 704                 }
 705                 else
 706                 {
 707                         WriteOpers("*** \2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 708                         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\
 709                                 \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);
 710                         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\
 711                                 \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);
 712                 }
 713         }
 714
 715         /* When an outbound connection finishes connecting, we receive
 716          * this event, and must send our SERVER string to the other
 717          * side. If the other side is happy, as outlined in the server
 718          * to server docs on the inspircd.org site, the other side
 719          * will then send back its own server string.
 720          */
 721         virtual bool OnConnected()
 722         {
 723                 if (this->LinkState == CONNECTING)
 724                 {
 725                         /* we do not need to change state here. */
 726                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 727                         {
 728                                 if (x->Name == this->myhost)
 729                                 {
 730                                         Srv->SendOpers("*** Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] established.");
 731                                         this->SendCapabilities();
 732                                         if (x->EncryptionKey != "")
 733                                         {
 734                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 735                                                 {
 736                                                         WriteOpers("\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 737                                                 }
 738                                                 else
 739                                                 {
 740                                                         this->WriteLine("AES "+Srv->GetServerName());
 741                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 742                                                 }
 743                                         }
 744                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 745                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 746                                         return true;
 747                                 }
 748                         }
 749                 }
 750                 /* There is a (remote) chance that between the /CONNECT and the connection
 751                  * being accepted, some muppet has removed the <link> block and rehashed.
 752                  * If that happens the connection hangs here until it's closed. Unlikely
 753                  * and rather harmless.
 754                  */
 755                 Srv->SendOpers("*** Connection to \2"+myhost+"\2 lost link tag(!)");
 756                 return true;
 757         }
 758
 759         virtual void OnError(InspSocketError e)
 760         {
 761                 /* We don't handle this method, because all our
 762                  * dirty work is done in OnClose() (see below)
 763                  * which is still called on error conditions too.
 764                  */
 765                 if (e == I_ERR_CONNECT)
 766                 {
 767                         Srv->SendOpers("*** Connection failed: Connection refused");
 768                 }
 769         }
 770
 771         virtual int OnDisconnect()
 772         {
 773                 /* For the same reason as above, we don't
 774                  * handle OnDisconnect()
 775                  */
 776                 return true;
 777         }
 778
 779         /* Recursively send the server tree with distances as hops.
 780          * This is used during network burst to inform the other server
 781          * (and any of ITS servers too) of what servers we know about.
 782          * If at any point any of these servers already exist on the other
 783          * end, our connection may be terminated. The hopcounts given
 784          * by this function are relative, this doesn't matter so long as
 785          * they are all >1, as all the remote servers re-calculate them
 786          * to be relative too, with themselves as hop 0.
 787          */
 788         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 789         {
 790                 char command[1024];
 791                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 792                 {
 793                         TreeServer* recursive_server = Current->GetChild(q);
 794                         if (recursive_server != s)
 795                         {
 796                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 797                                 this->WriteLine(command);
 798                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 799                                 /* down to next level */
 800                                 this->SendServers(recursive_server, s, hops+1);
 801                         }
 802                 }
 803         }
 804
 805         std::string MyCapabilities()
 806         {
 807                 ServerConfig* Config = Srv->GetConfig();
 808                 std::vector<std::string> modlist;
 809                 std::string capabilities = "";
 810
 811                 for (int i = 0; i <= MODCOUNT; i++)
 812                 {
 813                         if ((modules[i]->GetVersion().Flags & VF_STATIC) || (modules[i]->GetVersion().Flags & VF_COMMON))
 814                                 modlist.push_back(Config->module_names[i]);
 815                 }
 816                 sort(modlist.begin(),modlist.end());
 817                 for (unsigned int i = 0; i < modlist.size(); i++)
 818                 {
 819                         if (i)
 820                                 capabilities = capabilities + ",";
 821                         capabilities = capabilities + modlist[i];
 822                 }
 823                 return capabilities;
 824         }
 825
 826         void SendCapabilities()
 827         {
 828                 this->WriteLine("CAPAB "+MyCapabilities());
 829         }
 830
 831         bool Capab(std::deque<std::string> params)
 832         {
 833                 if (params.size() != 1)
 834                 {
 835                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB");
 836                         return false;
 837                 }
 838
 839                 if (params[0] != this->MyCapabilities())
 840                 {
 841                         std::string quitserver = this->myhost;
 842                         if (this->InboundServerName != "")
 843                         {
 844                                 quitserver = this->InboundServerName;
 845                         }
 846
 847                         WriteOpers("*** \2ERROR\2: Server '%s' does not have the same set of modules loaded, cannot link!",quitserver.c_str());
 848                         WriteOpers("*** Our networked module set is: '%s'",this->MyCapabilities().c_str());
 849                         WriteOpers("*** Other server's networked module set is: '%s'",params[0].c_str());
 850                         WriteOpers("*** These lists must match exactly on both servers. Please correct these errors, and try again.");
 851                         this->WriteLine("ERROR :CAPAB mismatch; My capabilities: '"+this->MyCapabilities()+"'");
 852                         return false;
 853                 }
 854
 855                 return true;
 856         }
 857
 858         /* This function forces this server to quit, removing this server
 859          * and any users on it (and servers and users below that, etc etc).
 860          * It's very slow and pretty clunky, but luckily unless your network
 861          * is having a REAL bad hair day, this function shouldnt be called
 862          * too many times a month ;-)
 863          */
 864         void SquitServer(std::string &from, TreeServer* Current)
 865         {
 866                 /* recursively squit the servers attached to 'Current'.
 867                  * We're going backwards so we don't remove users
 868                  * while we still need them ;)
 869                  */
 870                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 871                 {
 872                         TreeServer* recursive_server = Current->GetChild(q);
 873                         this->SquitServer(from,recursive_server);
 874                 }
 875                 /* Now we've whacked the kids, whack self */
 876                 num_lost_servers++;
 877                 num_lost_users += Current->QuitUsers(from);
 878                 /*for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 879                 {
 880                         if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 881                         {
 882                                 Goners->AddItem(u->second,from);
 883                                 num_lost_users++;
 884                         }
 885                 }*/
 886         }
 887
 888         /* This is a wrapper function for SquitServer above, which
 889          * does some validation first and passes on the SQUIT to all
 890          * other remaining servers.
 891          */
 892         void Squit(TreeServer* Current,std::string reason)
 893         {
 894                 if ((Current) && (Current != TreeRoot))
 895                 {
 896                         std::deque<std::string> params;
 897                         params.push_back(Current->GetName());
 898                         params.push_back(":"+reason);
 899                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 900                         if (Current->GetParent() == TreeRoot)
 901                         {
 902                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 903                         }
 904                         else
 905                         {
 906                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 907                         }
 908                         num_lost_servers = 0;
 909                         num_lost_users = 0;
 910                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
 911                         SquitServer(from, Current);
 912                         Current->Tidy();
 913                         Current->GetParent()->DelChild(Current);
 914                         DELETE(Current);
 915                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 916                 }
 917                 else
 918                 {
 919                         log(DEFAULT,"Squit from unknown server");
 920                 }
 921         }
 922
 923         /* FMODE command */
 924         bool ForceMode(std::string source, std::deque<std::string> &params)
 925         {
 926                 if (params.size() < 2)
 927                         return true;
 928                 userrec* who = new userrec();
 929                 who->fd = FD_MAGIC_NUMBER;
 930                 char* modelist[64];
 931                 memset(&modelist,0,sizeof(modelist));
 932                 for (unsigned int q = 0; q < params.size(); q++)
 933                 {
 934                         modelist[q] = (char*)params[q].c_str();
 935                 }
 936                 Srv->SendMode(modelist,params.size(),who);
 937                 DoOneToAllButSender(source,"FMODE",params,source);
 938                 DELETE(who);
 939                 return true;
 940         }
 941
 942         /* FTOPIC command */
 943         bool ForceTopic(std::string source, std::deque<std::string> &params)
 944         {
 945                 if (params.size() != 4)
 946                         return true;
 947                 time_t ts = atoi(params[1].c_str());
 948                 std::string nsource = source;
 949
 950                 chanrec* c = Srv->FindChannel(params[0]);
 951                 if (c)
 952                 {
 953                         if ((ts >= c->topicset) || (!*c->topic))
 954                         {
 955                                 std::string oldtopic = c->topic;
 956                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
 957                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
 958                                 c->topicset = ts;
 959                                 /* if the topic text is the same as the current topic,
 960                                  * dont bother to send the TOPIC command out, just silently
 961                                  * update the set time and set nick.
 962                                  */
 963                                 if (oldtopic != params[3])
 964                                 {
 965                                         userrec* user = Srv->FindNick(source);
 966                                         if (!user)
 967                                         {
 968                                                 WriteChannelWithServ((char*)source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
 969                                         }
 970                                         else
 971                                         {
 972                                                 WriteChannel(c, user, "TOPIC %s :%s", c->name, c->topic);
 973                                                 nsource = user->server;
 974                                         }
 975                                         /* all done, send it on its way */
 976                                         params[3] = ":" + params[3];
 977                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
 978                                 }
 979                         }
 980
 981                 }
 982
 983                 return true;
 984         }
 985
 986         /* FJOIN, similar to unreal SJOIN */
 987         bool ForceJoin(std::string source, std::deque<std::string> &params)
 988         {
 989                 if (params.size() < 3)
 990                         return true;
 991
 992                 char first[MAXBUF];
 993                 char modestring[MAXBUF];
 994                 char* mode_users[127];
 995                 memset(&mode_users,0,sizeof(mode_users));
 996                 mode_users[0] = first;
 997                 mode_users[1] = modestring;
 998                 strcpy(mode_users[1],"+");
 999                 unsigned int modectr = 2;
1000
1001                 userrec* who = NULL;
1002                 std::string channel = params[0];
1003                 time_t TS = atoi(params[1].c_str());
1004                 char* key = "";
1005
1006                 chanrec* chan = Srv->FindChannel(channel);
1007                 if (chan)
1008                 {
1009                         key = chan->key;
1010                 }
1011                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1012
1013                 /* default is a high value, which if we dont have this
1014                  * channel will let the other side apply their modes.
1015                  */
1016                 time_t ourTS = time(NULL)+600;
1017                 chanrec* us = Srv->FindChannel(channel);
1018                 if (us)
1019                 {
1020                         ourTS = us->age;
1021                 }
1022
1023                 log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
1024
1025                 /* do this first, so our mode reversals are correctly received by other servers
1026                  * if there is a TS collision.
1027                  */
1028                 DoOneToAllButSender(source,"FJOIN",params,source);
1029
1030                 for (unsigned int usernum = 2; usernum < params.size(); usernum++)
1031                 {
1032                         /* process one channel at a time, applying modes. */
1033                         char* usr = (char*)params[usernum].c_str();
1034                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1035                          * (is this even possible?) */
1036                         if (usr && *usr)
1037                         {
1038                                 char permissions = *usr;
1039                                 switch (permissions)
1040                                 {
1041                                         case '@':
1042                                                 usr++;
1043                                                 mode_users[modectr++] = usr;
1044                                                 strlcat(modestring,"o",MAXBUF);
1045                                         break;
1046                                         case '%':
1047                                                 usr++;
1048                                                 mode_users[modectr++] = usr;
1049                                                 strlcat(modestring,"h",MAXBUF);
1050                                         break;
1051                                         case '+':
1052                                                 usr++;
1053                                                 mode_users[modectr++] = usr;
1054                                                 strlcat(modestring,"v",MAXBUF);
1055                                         break;
1056                                 }
1057                                 who = Srv->FindNick(usr);
1058                                 if (who)
1059                                 {
1060                                         Srv->JoinUserToChannel(who,channel,key);
1061                                         if (modectr >= (MAXMODES-1))
1062                                         {
1063                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1064                                                  * if there are more than MAXMODES to go.
1065                                                  */
1066                                                 if ((ourTS >= TS) || (Srv->IsUlined(who->server)))
1067                                                 {
1068                                                         /* We also always let u-lined clients win, no matter what the TS value */
1069                                                         log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1070                                                         Srv->SendMode(mode_users,modectr,who);
1071                                                 }
1072                                                 else
1073                                                 {
1074                                                         log(DEBUG,"Their channel newer than ours, bouncing their modes");
1075                                                         /* bouncy bouncy! */
1076                                                         std::deque<std::string> params;
1077                                                         /* modes are now being UNSET... */
1078                                                         *mode_users[1] = '-';
1079                                                         for (unsigned int x = 0; x < modectr; x++)
1080                                                         {
1081                                                                 params.push_back(mode_users[x]);
1082                                                         }
1083                                                         // tell everyone to bounce the modes. bad modes, bad!
1084                                                         DoOneToMany(Srv->GetServerName(),"FMODE",params);
1085                                                 }
1086                                                 strcpy(mode_users[1],"+");
1087                                                 modectr = 2;
1088                                         }
1089                                 }
1090                         }
1091                 }
1092                 /* there werent enough modes built up to flush it during FJOIN,
1093                  * or, there are a number left over. flush them out.
1094                  */
1095                 if ((modectr > 2) && (who))
1096                 {
1097                         if (ourTS >= TS)
1098                         {
1099                                 log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1100                                 Srv->SendMode(mode_users,modectr,who);
1101                         }
1102                         else
1103                         {
1104                                 log(DEBUG,"Their channel newer than ours, bouncing their modes");
1105                                 std::deque<std::string> params;
1106                                 *mode_users[1] = '-';
1107                                 for (unsigned int x = 0; x < modectr; x++)
1108                                 {
1109                                         params.push_back(mode_users[x]);
1110                                 }
1111                                 DoOneToMany(Srv->GetServerName(),"FMODE",params);
1112                         }
1113                 }
1114                 return true;
1115         }
1116
1117         bool SyncChannelTS(std::string source, std::deque<std::string> &params)
1118         {
1119                 if (params.size() == 2)
1120                 {
1121                         chanrec* c = Srv->FindChannel(params[0]);
1122                         if (c)
1123                         {
1124                                 time_t theirTS = atoi(params[1].c_str());
1125                                 time_t ourTS = c->age;
1126                                 if (ourTS >= theirTS)
1127                                 {
1128                                         log(DEBUG,"Updating timestamp for %s, our timestamp was %lu and theirs is %lu",c->name,ourTS,theirTS);
1129                                         c->age = theirTS;
1130                                 }
1131                         }
1132                 }
1133                 DoOneToAllButSender(Srv->GetServerName(),"SYNCTS",params,source);
1134                 return true;
1135         }
1136
1137         /* NICK command */
1138         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1139         {
1140                 if (params.size() < 8)
1141                         return true;
1142                 if (params.size() > 8)
1143                 {
1144                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1145                         return true;
1146                 }
1147                 // NICK age nick host dhost ident +modes ip :gecos
1148                 //   0   123  4 56   7
1149                 time_t age = atoi(params[0].c_str());
1150                 std::string modes = params[5];
1151                 while (*(modes.c_str()) == '+')
1152                 {
1153                         char* m = (char*)modes.c_str();
1154                         m++;
1155                         modes = m;
1156                 }
1157                 char* tempnick = (char*)params[1].c_str();
1158                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1159
1160                 user_hash::iterator iter;
1161                 iter = clientlist.find(tempnick);
1162                 if (iter != clientlist.end())
1163                 {
1164                         // nick collision
1165                         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);
1166                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Nickname collision");
1167                         return true;
1168                 }
1169
1170                 clientlist[tempnick] = new userrec();
1171                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
1172                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX-1);
1173                 strlcpy(clientlist[tempnick]->host, params[2].c_str(),63);
1174                 strlcpy(clientlist[tempnick]->dhost, params[3].c_str(),63);
1175                 clientlist[tempnick]->server = (char*)FindServerNamePtr(source.c_str());
1176                 strlcpy(clientlist[tempnick]->ident, params[4].c_str(),IDENTMAX);
1177                 strlcpy(clientlist[tempnick]->fullname, params[7].c_str(),MAXGECOS);
1178                 clientlist[tempnick]->registered = 7;
1179                 clientlist[tempnick]->signon = age;
1180                 strlcpy(clientlist[tempnick]->modes, modes.c_str(),53);
1181                 for (char *v = clientlist[tempnick]->modes; *v; v++)
1182                 {
1183                         switch (*v)
1184                         {
1185                                 case 'i':
1186                                         clientlist[tempnick]->modebits |= UM_INVISIBLE;
1187                                 break;
1188                                 case 'w':
1189                                         clientlist[tempnick]->modebits |= UM_WALLOPS;
1190                                 break;
1191                                 case 's':
1192                                         clientlist[tempnick]->modebits |= UM_SERVERNOTICE;
1193                                 break;
1194                                 default:
1195                                 break;
1196                         }
1197                 }
1198                 inet_aton(params[6].c_str(),&clientlist[tempnick]->ip4);
1199
1200                 WriteOpers("*** Client connecting at %s: %s!%s@%s [%s]",clientlist[tempnick]->server,clientlist[tempnick]->nick,clientlist[tempnick]->ident,clientlist[tempnick]->host,(char*)inet_ntoa(clientlist[tempnick]->ip4));
1201
1202                 params[7] = ":" + params[7];
1203                 DoOneToAllButSender(source,"NICK",params,source);
1204
1205                 // Increment the Source Servers User Count..
1206                 TreeServer* SourceServer = FindServer(source);
1207                 if (SourceServer)
1208                 {
1209                         log(DEBUG,"Found source server of %s",clientlist[tempnick]->nick);
1210                         SourceServer->AddUser(clientlist[tempnick]);
1211                         SourceServer->AddUserCount();
1212                 }
1213
1214                 return true;
1215         }
1216
1217         /* Send one or more FJOINs for a channel of users.
1218          * If the length of a single line is more than 480-NICKMAX
1219          * in length, it is split over multiple lines.
1220          */
1221         void SendFJoins(TreeServer* Current, chanrec* c)
1222         {
1223                 log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1224                 char list[MAXBUF];
1225                 std::string individual_halfops = ":"+Srv->GetServerName()+" FMODE "+c->name;
1226
1227                 size_t dlen, curlen;
1228                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
1229                 int numusers = 0;
1230                 char* ptr = list + dlen;
1231
1232                 CUList *ulist = c->GetUsers();
1233                 std::vector<userrec*> specific_halfop;
1234                 std::vector<userrec*> specific_voice;
1235
1236                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1237                 {
1238                         int x = cflags(i->second,c);
1239                         if ((x & UCMODE_HOP) && (x & UCMODE_OP))
1240                         {
1241                                 specific_halfop.push_back(i->second);
1242                         }
1243                         if (((x & UCMODE_HOP) || (x & UCMODE_OP)) && (x & UCMODE_VOICE))
1244                         {
1245                                 specific_voice.push_back(i->second);
1246                         }
1247
1248                         const char* n = "";
1249                         if (x & UCMODE_OP)
1250                         {
1251                                 n = "@";
1252                         }
1253                         else if (x & UCMODE_HOP)
1254                         {
1255                                 n = "%";
1256                         }
1257                         else if (x & UCMODE_VOICE)
1258                         {
1259                                 n = "+";
1260                         }
1261
1262                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s", n, i->second->nick);
1263
1264                         curlen += ptrlen;
1265                         ptr += ptrlen;
1266
1267                         numusers++;
1268
1269                         if (curlen > (480-NICKMAX))
1270                         {
1271                                 this->WriteLine(list);
1272                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
1273                                 ptr = list + dlen;
1274                                 ptrlen = 0;
1275                                 numusers = 0;
1276                                 for (unsigned int y = 0; y < specific_voice.size(); y++)
1277                                 {
1278                                         this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" +v "+specific_voice[y]->nick);
1279                                 }
1280                                 for (unsigned int y = 0; y < specific_halfop.size(); y++)
1281                                 {
1282                                         this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" +h "+specific_halfop[y]->nick);
1283                                 }
1284                         }
1285                 }
1286                 if (numusers)
1287                 {
1288                         this->WriteLine(list);
1289                         for (unsigned int y = 0; y < specific_voice.size(); y++)
1290                         {
1291                                 this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" +v "+specific_voice[y]->nick);
1292                         }
1293                         for (unsigned int y = 0; y < specific_halfop.size(); y++)
1294                         {
1295                                 this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" +h "+specific_halfop[y]->nick);
1296                         }
1297                 }
1298                 this->WriteLine(":"+Srv->GetServerName()+" SYNCTS "+c->name+" "+ConvToStr(c->age));
1299         }
1300
1301         /* Send G, Q, Z and E lines */
1302         void SendXLines(TreeServer* Current)
1303         {
1304                 char data[MAXBUF];
1305                 std::string n = Srv->GetServerName();
1306                 const char* sn = n.c_str();
1307                 int iterations = 0;
1308                 /* Yes, these arent too nice looking, but they get the job done */
1309                 for (std::vector<ZLine>::iterator i = zlines.begin(); i != zlines.end(); i++, iterations++)
1310                 {
1311                         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);
1312                         this->WriteLine(data);
1313                 }
1314                 for (std::vector<QLine>::iterator i = qlines.begin(); i != qlines.end(); i++, iterations++)
1315                 {
1316                         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);
1317                         this->WriteLine(data);
1318                 }
1319                 for (std::vector<GLine>::iterator i = glines.begin(); i != glines.end(); i++, iterations++)
1320                 {
1321                         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);
1322                         this->WriteLine(data);
1323                 }
1324                 for (std::vector<ELine>::iterator i = elines.begin(); i != elines.end(); i++, iterations++)
1325                 {
1326                         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);
1327                         this->WriteLine(data);
1328                 }
1329                 for (std::vector<ZLine>::iterator i = pzlines.begin(); i != pzlines.end(); i++, iterations++)
1330                 {
1331                         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);
1332                         this->WriteLine(data);
1333                 }
1334                 for (std::vector<QLine>::iterator i = pqlines.begin(); i != pqlines.end(); i++, iterations++)
1335                 {
1336                         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);
1337                         this->WriteLine(data);
1338                 }
1339                 for (std::vector<GLine>::iterator i = pglines.begin(); i != pglines.end(); i++, iterations++)
1340                 {
1341                         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);
1342                         this->WriteLine(data);
1343                 }
1344                 for (std::vector<ELine>::iterator i = pelines.begin(); i != pelines.end(); i++, iterations++)
1345                 {
1346                         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);
1347                         this->WriteLine(data);
1348                 }
1349         }
1350
1351         /* Send channel modes and topics */
1352         void SendChannelModes(TreeServer* Current)
1353         {
1354                 char data[MAXBUF];
1355                 std::deque<std::string> list;
1356                 int iterations = 0;
1357                 std::string n = Srv->GetServerName();
1358                 const char* sn = n.c_str();
1359                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++, iterations++)
1360                 {
1361                         SendFJoins(Current, c->second);
1362                         snprintf(data,MAXBUF,":%s FMODE %s +%s",sn,c->second->name,chanmodes(c->second,true));
1363                         this->WriteLine(data);
1364                         if (*c->second->topic)
1365                         {
1366                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1367                                 this->WriteLine(data);
1368                         }
1369                         for (BanList::iterator b = c->second->bans.begin(); b != c->second->bans.end(); b++)
1370                         {
1371                                 snprintf(data,MAXBUF,":%s FMODE %s +b %s",sn,c->second->name,b->data);
1372                                 this->WriteLine(data);
1373                         }
1374                         FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1375                         list.clear();
1376                         c->second->GetExtList(list);
1377                         for (unsigned int j = 0; j < list.size(); j++)
1378                         {
1379                                 FOREACH_MOD(I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1380                         }
1381                 }
1382         }
1383
1384         /* send all users and their oper state/modes */
1385         void SendUsers(TreeServer* Current)
1386         {
1387                 char data[MAXBUF];
1388                 std::deque<std::string> list;
1389                 int iterations = 0;
1390                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++, iterations++)
1391                 {
1392                         if (u->second->registered == 7)
1393                         {
1394                                 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->modes,(char*)inet_ntoa(u->second->ip4),u->second->fullname);
1395                                 this->WriteLine(data);
1396                                 if (*u->second->oper)
1397                                 {
1398                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1399                                 }
1400                                 if (*u->second->awaymsg)
1401                                 {
1402                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1403                                 }
1404                                 FOREACH_MOD(I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1405                                 list.clear();
1406                                 u->second->GetExtList(list);
1407                                 for (unsigned int j = 0; j < list.size(); j++)
1408                                 {
1409                                         FOREACH_MOD(I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1410                                 }
1411                         }
1412                 }
1413         }
1414
1415         /* This function is called when we want to send a netburst to a local
1416          * server. There is a set order we must do this, because for example
1417          * users require their servers to exist, and channels require their
1418          * users to exist. You get the idea.
1419          */
1420         void DoBurst(TreeServer* s)
1421         {
1422                 /* The calls here to ServerInstance-> yield the processing
1423                  * back to the core so that a large burst is split into at least 6 sections
1424                  * (possibly more)
1425                  */
1426                 std::string burst = "BURST "+ConvToStr(time(NULL));
1427                 std::string endburst = "ENDBURST";
1428                 // Because by the end of the netburst, it  could be gone!
1429                 std::string name = s->GetName();
1430                 Srv->SendOpers("*** Bursting to \2"+name+"\2.");
1431                 this->WriteLine(burst);
1432                 /* send our version string */
1433                 this->WriteLine(":"+Srv->GetServerName()+" VERSION :"+Srv->GetVersion());
1434                 /* Send server tree */
1435                 this->SendServers(TreeRoot,s,1);
1436                 /* Send users and their oper status */
1437                 this->SendUsers(s);
1438                 /* Send everything else (channel modes, xlines etc) */
1439                 this->SendChannelModes(s);
1440                 this->SendXLines(s);
1441                 FOREACH_MOD(I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1442                 this->WriteLine(endburst);
1443                 Srv->SendOpers("*** Finished bursting to \2"+name+"\2.");
1444         }
1445
1446         /* This function is called when we receive data from a remote
1447          * server. We buffer the data in a std::string (it doesnt stay
1448          * there for long), reading using InspSocket::Read() which can
1449          * read up to 16 kilobytes in one operation.
1450          *
1451          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1452          * THE SOCKET OBJECT FOR US.
1453          */
1454         virtual bool OnDataReady()
1455         {
1456                 char* data = this->Read();
1457                 /* Check that the data read is a valid pointer and it has some content */
1458                 if (data && *data)
1459                 {
1460                         this->in_buffer.append(data);
1461                         /* While there is at least one new line in the buffer,
1462                          * do something useful (we hope!) with it.
1463                          */
1464                         while (in_buffer.find("\n") != std::string::npos)
1465                         {
1466                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1467                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1468                                 if (ret.find("\r") != std::string::npos)
1469                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1470                                 /* Process this one, abort if it
1471                                  * didnt return true.
1472                                  */
1473                                 if (this->ctx_in)
1474                                 {
1475                                         char out[1024];
1476                                         char result[1024];
1477                                         memset(result,0,1024);
1478                                         memset(out,0,1024);
1479                                         log(DEBUG,"Original string '%s'",ret.c_str());
1480                                         /* ERROR + CAPAB is still allowed unencryped */
1481                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1482                                         {
1483                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1484                                                 if ((nbytes > 0) && (nbytes < 1024))
1485                                                 {
1486                                                         log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1487                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1488                                                         for (int t = 0; t < nbytes; t++)
1489                                                                 if (result[t] == '\7') result[t] = 0;
1490                                                         ret = result;
1491                                                 }
1492                                         }
1493                                 }
1494                                 if (!this->ProcessLine(ret))
1495                                 {
1496                                         log(DEBUG,"ProcessLine says no!");
1497                                         return false;
1498                                 }
1499                         }
1500                         return true;
1501                 }
1502                 /* EAGAIN returns an empty but non-NULL string, so this
1503                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1504                  */
1505                 return (data && !*data);
1506         }
1507
1508         int WriteLine(std::string line)
1509         {
1510                 log(DEBUG,"OUT: %s",line.c_str());
1511                 if (this->ctx_out)
1512                 {
1513                         char result[10240];
1514                         char result64[10240];
1515                         if (this->keylength)
1516                         {
1517                                 // pad it to the key length
1518                                 int n = this->keylength - (line.length() % this->keylength);
1519                                 if (n)
1520                                 {
1521                                         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);
1522                                         line.append(n,'\7');
1523                                 }
1524                         }
1525                         unsigned int ll = line.length();
1526                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
1527                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
1528                         line = result64;
1529                         //int from64tobits(char *out, const char *in, int maxlen);
1530                 }
1531                 return this->Write(line + "\r\n");
1532         }
1533
1534         /* Handle ERROR command */
1535         bool Error(std::deque<std::string> &params)
1536         {
1537                 if (params.size() < 1)
1538                         return false;
1539                 WriteOpers("*** ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
1540                 /* we will return false to cause the socket to close. */
1541                 return false;
1542         }
1543
1544         /* Because the core won't let users or even SERVERS set +o,
1545          * we use the OPERTYPE command to do this.
1546          */
1547         bool OperType(std::string prefix, std::deque<std::string> &params)
1548         {
1549                 if (params.size() != 1)
1550                 {
1551                         log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
1552                         return true;
1553                 }
1554                 std::string opertype = params[0];
1555                 userrec* u = Srv->FindNick(prefix);
1556                 if (u)
1557                 {
1558                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
1559                         if (!strchr(u->modes,'o'))
1560                         {
1561                                 strcat(u->modes,"o");
1562                         }
1563                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
1564                 }
1565                 return true;
1566         }
1567
1568         /* Because Andy insists that services-compatible servers must
1569          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
1570          */
1571         bool ForceNick(std::string prefix, std::deque<std::string> &params)
1572         {
1573                 if (params.size() < 3)
1574                         return true;
1575
1576                 userrec* u = Srv->FindNick(params[0]);
1577
1578                 if (u)
1579                 {
1580                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
1581                         if (IS_LOCAL(u))
1582                         {
1583                                 std::deque<std::string> par;
1584                                 par.push_back(params[1]);
1585                                 /* This is not required as one is sent in OnUserPostNick below
1586                                  */
1587                                 //DoOneToMany(u->nick,"NICK",par);
1588                                 Srv->ChangeUserNick(u,params[1]);
1589                                 u->age = atoi(params[2].c_str());
1590                         }
1591                 }
1592                 return true;
1593         }
1594
1595         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
1596         {
1597                 if (params.size() < 2)
1598                         return true;
1599
1600                 userrec* u = Srv->FindNick(params[0]);
1601
1602                 if (u)
1603                 {
1604                         Srv->JoinUserToChannel(u,params[1],"");
1605                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
1606                 }
1607                 return true;
1608         }
1609
1610         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
1611         {
1612                 if (params.size() < 1)
1613                         return false;
1614
1615                 std::string servermask = params[0];
1616
1617                 if (Srv->MatchText(Srv->GetServerName(),servermask))
1618                 {
1619                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
1620                         Srv->RehashServer();
1621                         ReadConfiguration(false);
1622                 }
1623                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
1624                 return true;
1625         }
1626
1627         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
1628         {
1629                 if (params.size() != 2)
1630                         return true;
1631
1632                 std::string nick = params[0];
1633                 userrec* u = Srv->FindNick(prefix);
1634                 userrec* who = Srv->FindNick(nick);
1635
1636                 if (who)
1637                 {
1638                         /* Prepend kill source, if we don't have one */
1639                         std::string sourceserv = prefix;
1640                         if (u)
1641                         {
1642                                 sourceserv = u->server;
1643                         }
1644                         if (*(params[1].c_str()) != '[')
1645                         {
1646                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
1647                         }
1648                         std::string reason = params[1];
1649                         params[1] = ":" + params[1];
1650                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
1651                         Srv->QuitUser(who,reason);
1652                 }
1653                 return true;
1654         }
1655
1656         bool LocalPong(std::string prefix, std::deque<std::string> &params)
1657         {
1658                 if (params.size() < 1)
1659                         return true;
1660
1661                 if (params.size() == 1)
1662                 {
1663                         TreeServer* ServerSource = FindServer(prefix);
1664                         if (ServerSource)
1665                         {
1666                                 ServerSource->SetPingFlag();
1667                         }
1668                 }
1669                 else
1670                 {
1671                         std::string forwardto = params[1];
1672                         if (forwardto == Srv->GetServerName())
1673                         {
1674                                 /*
1675                                  * this is a PONG for us
1676                                  * if the prefix is a user, check theyre local, and if they are,
1677                                  * dump the PONG reply back to their fd. If its a server, do nowt.
1678                                  * Services might want to send these s->s, but we dont need to yet.
1679                                  */
1680                                 userrec* u = Srv->FindNick(prefix);
1681
1682                                 if (u)
1683                                 {
1684                                         WriteServ(u->fd,"PONG %s %s",params[0].c_str(),params[1].c_str());
1685                                 }
1686                         }
1687                         else
1688                         {
1689                                 // not for us, pass it on :)
1690                                 DoOneToOne(prefix,"PONG",params,forwardto);
1691                         }
1692                 }
1693
1694                 return true;
1695         }
1696
1697         bool MetaData(std::string prefix, std::deque<std::string> &params)
1698         {
1699                 if (params.size() < 3)
1700                         return true;
1701
1702                 TreeServer* ServerSource = FindServer(prefix);
1703
1704                 if (ServerSource)
1705                 {
1706                         if (params[0] == "*")
1707                         {
1708                                 FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
1709                         }
1710                         else if (*(params[0].c_str()) == '#')
1711                         {
1712                                 chanrec* c = Srv->FindChannel(params[0]);
1713                                 if (c)
1714                                 {
1715                                         FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
1716                                 }
1717                         }
1718                         else if (*(params[0].c_str()) != '#')
1719                         {
1720                                 userrec* u = Srv->FindNick(params[0]);
1721                                 if (u)
1722                                 {
1723                                         FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
1724                                 }
1725                         }
1726                 }
1727
1728                 params[2] = ":" + params[2];
1729                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
1730                 return true;
1731         }
1732
1733         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
1734         {
1735                 if (params.size() < 1)
1736                         return true;
1737
1738                 TreeServer* ServerSource = FindServer(prefix);
1739
1740                 if (ServerSource)
1741                 {
1742                         ServerSource->SetVersion(params[0]);
1743                 }
1744                 params[0] = ":" + params[0];
1745                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
1746                 return true;
1747         }
1748
1749         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
1750         {
1751                 if (params.size() < 1)
1752                         return true;
1753
1754                 userrec* u = Srv->FindNick(prefix);
1755
1756                 if (u)
1757                 {
1758                         Srv->ChangeHost(u,params[0]);
1759                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
1760                 }
1761                 return true;
1762         }
1763
1764         bool AddLine(std::string prefix, std::deque<std::string> &params)
1765         {
1766                 if (params.size() < 6)
1767                         return true;
1768
1769                 bool propogate = false;
1770
1771                 switch (*(params[0].c_str()))
1772                 {
1773                         case 'Z':
1774                                 propogate = add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1775                                 zline_set_creation_time((char*)params[1].c_str(), atoi(params[3].c_str()));
1776                         break;
1777                         case 'Q':
1778                                 propogate = add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1779                                 qline_set_creation_time((char*)params[1].c_str(), atoi(params[3].c_str()));
1780                         break;
1781                         case 'E':
1782                                 propogate = add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1783                                 eline_set_creation_time((char*)params[1].c_str(), atoi(params[3].c_str()));
1784                         break;
1785                         case 'G':
1786                                 propogate = add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1787                                 gline_set_creation_time((char*)params[1].c_str(), atoi(params[3].c_str()));
1788                         break;
1789                         case 'K':
1790                                 propogate = add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1791                         break;
1792                         default:
1793                                 /* Just in case... */
1794                                 Srv->SendOpers("*** \2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
1795                                 propogate = false;
1796                         break;
1797                 }
1798
1799                 /* Send it on its way */
1800                 if (propogate)
1801                 {
1802                         if (atoi(params[4].c_str()))
1803                         {
1804                                 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());
1805                         }
1806                         else
1807                         {
1808                                 WriteOpers("*** %s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
1809                         }
1810                         params[5] = ":" + params[5];
1811                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
1812                 }
1813                 if (!this->bursting)
1814                 {
1815                         log(DEBUG,"Applying lines...");
1816                         apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
1817                 }
1818                 return true;
1819         }
1820
1821         bool ChangeName(std::string prefix, std::deque<std::string> &params)
1822         {
1823                 if (params.size() < 1)
1824                         return true;
1825
1826                 userrec* u = Srv->FindNick(prefix);
1827
1828                 if (u)
1829                 {
1830                         Srv->ChangeGECOS(u,params[0]);
1831                         params[0] = ":" + params[0];
1832                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
1833                 }
1834                 return true;
1835         }
1836
1837         bool Whois(std::string prefix, std::deque<std::string> &params)
1838         {
1839                 if (params.size() < 1)
1840                         return true;
1841
1842                 log(DEBUG,"In IDLE command");
1843                 userrec* u = Srv->FindNick(prefix);
1844
1845                 if (u)
1846                 {
1847                         log(DEBUG,"USER EXISTS: %s",u->nick);
1848                         // an incoming request
1849                         if (params.size() == 1)
1850                         {
1851                                 userrec* x = Srv->FindNick(params[0]);
1852                                 if ((x) && (x->fd > -1))
1853                                 {
1854                                         userrec* x = Srv->FindNick(params[0]);
1855                                         log(DEBUG,"Got IDLE");
1856                                         char signon[MAXBUF];
1857                                         char idle[MAXBUF];
1858                                         log(DEBUG,"Sending back IDLE 3");
1859                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
1860                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
1861                                         std::deque<std::string> par;
1862                                         par.push_back(prefix);
1863                                         par.push_back(signon);
1864                                         par.push_back(idle);
1865                                         // ours, we're done, pass it BACK
1866                                         DoOneToOne(params[0],"IDLE",par,u->server);
1867                                 }
1868                                 else
1869                                 {
1870                                         // not ours pass it on
1871                                         DoOneToOne(prefix,"IDLE",params,x->server);
1872                                 }
1873                         }
1874                         else if (params.size() == 3)
1875                         {
1876                                 std::string who_did_the_whois = params[0];
1877                                 userrec* who_to_send_to = Srv->FindNick(who_did_the_whois);
1878                                 if ((who_to_send_to) && (who_to_send_to->fd > -1))
1879                                 {
1880                                         log(DEBUG,"Got final IDLE");
1881                                         // an incoming reply to a whois we sent out
1882                                         std::string nick_whoised = prefix;
1883                                         unsigned long signon = atoi(params[1].c_str());
1884                                         unsigned long idle = atoi(params[2].c_str());
1885                                         if ((who_to_send_to) && (who_to_send_to->fd > -1))
1886                                                 do_whois(who_to_send_to,u,signon,idle,(char*)nick_whoised.c_str());
1887                                 }
1888                                 else
1889                                 {
1890                                         // not ours, pass it on
1891                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
1892                                 }
1893                         }
1894                 }
1895                 return true;
1896         }
1897
1898         bool Push(std::string prefix, std::deque<std::string> &params)
1899         {
1900                 if (params.size() < 2)
1901                         return true;
1902
1903                 userrec* u = Srv->FindNick(params[0]);
1904
1905                 if (!u)
1906                         return true;
1907
1908                 if (IS_LOCAL(u))
1909                 {
1910                         // push the raw to the user
1911                         if (Srv->IsUlined(prefix))
1912                         {
1913                                 ::Write(u->fd,"%s",params[1].c_str());
1914                         }
1915                         else
1916                         {
1917                                 log(DEBUG,"PUSH from non-ulined server dropped into the bit-bucket:  :%s PUSH %s :%s",prefix.c_str(),params[0].c_str(),params[1].c_str());
1918                         }
1919                 }
1920                 else
1921                 {
1922                         // continue the raw onwards
1923                         params[1] = ":" + params[1];
1924                         DoOneToOne(prefix,"PUSH",params,u->server);
1925                 }
1926                 return true;
1927         }
1928
1929         bool Time(std::string prefix, std::deque<std::string> &params)
1930         {
1931                 // :source.server TIME remote.server sendernick
1932                 // :remote.server TIME source.server sendernick TS
1933                 if (params.size() == 2)
1934                 {
1935                         // someone querying our time?
1936                         if (Srv->GetServerName() == params[0])
1937                         {
1938                                 userrec* u = Srv->FindNick(params[1]);
1939                                 if (u)
1940                                 {
1941                                         char curtime[256];
1942                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
1943                                         params.push_back(curtime);
1944                                         params[0] = prefix;
1945                                         DoOneToOne(Srv->GetServerName(),"TIME",params,params[0]);
1946                                 }
1947                         }
1948                         else
1949                         {
1950                                 // not us, pass it on
1951                                 userrec* u = Srv->FindNick(params[1]);
1952                                 if (u)
1953                                         DoOneToOne(prefix,"TIME",params,params[0]);
1954                         }
1955                 }
1956                 else if (params.size() == 3)
1957                 {
1958                         // a response to a previous TIME
1959                         userrec* u = Srv->FindNick(params[1]);
1960                         if ((u) && (IS_LOCAL(u)))
1961                         {
1962                         time_t rawtime = atol(params[2].c_str());
1963                         struct tm * timeinfo;
1964                         timeinfo = localtime(&rawtime);
1965                                 char tms[26];
1966                                 snprintf(tms,26,"%s",asctime(timeinfo));
1967                                 tms[24] = 0;
1968                         WriteServ(u->fd,"391 %s %s :%s",u->nick,prefix.c_str(),tms);
1969                         }
1970                         else
1971                         {
1972                                 if (u)
1973                                         DoOneToOne(prefix,"TIME",params,u->server);
1974                         }
1975                 }
1976                 return true;
1977         }
1978
1979         bool LocalPing(std::string prefix, std::deque<std::string> &params)
1980         {
1981                 if (params.size() < 1)
1982                         return true;
1983
1984                 if (params.size() == 1)
1985                 {
1986                         std::string stufftobounce = params[0];
1987                         this->WriteLine(":"+Srv->GetServerName()+" PONG "+stufftobounce);
1988                         return true;
1989                 }
1990                 else
1991                 {
1992                         std::string forwardto = params[1];
1993                         if (forwardto == Srv->GetServerName())
1994                         {
1995                                 // this is a ping for us, send back PONG to the requesting server
1996                                 params[1] = params[0];
1997                                 params[0] = forwardto;
1998                                 DoOneToOne(forwardto,"PONG",params,params[1]);
1999                         }
2000                         else
2001                         {
2002                                 // not for us, pass it on :)
2003                                 DoOneToOne(prefix,"PING",params,forwardto);
2004                         }
2005                         return true;
2006                 }
2007         }
2008
2009         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2010         {
2011                 if (params.size() < 4)
2012                         return false;
2013
2014                 std::string servername = params[0];
2015                 std::string password = params[1];
2016                 // hopcount is not used for a remote server, we calculate this ourselves
2017                 std::string description = params[3];
2018                 TreeServer* ParentOfThis = FindServer(prefix);
2019
2020                 if (!ParentOfThis)
2021                 {
2022                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2023                         return false;
2024                 }
2025                 TreeServer* CheckDupe = FindServer(servername);
2026                 if (CheckDupe)
2027                 {
2028                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2029                         Srv->SendOpers("*** Server connection from \2"+servername+"\2 denied, already exists");
2030                         return false;
2031                 }
2032                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
2033                 ParentOfThis->AddChild(Node);
2034                 params[3] = ":" + params[3];
2035                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2036                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2037                 return true;
2038         }
2039
2040         bool Outbound_Reply_Server(std::deque<std::string> &params)
2041         {
2042                 if (params.size() < 4)
2043                         return false;
2044
2045                 irc::string servername = params[0].c_str();
2046                 std::string sname = params[0];
2047                 std::string password = params[1];
2048                 int hops = atoi(params[2].c_str());
2049
2050                 if (hops)
2051                 {
2052                         this->WriteLine("ERROR :Server too far away for authentication");
2053                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2054                         return false;
2055                 }
2056                 std::string description = params[3];
2057                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2058                 {
2059                         if ((x->Name == servername) && (x->RecvPass == password))
2060                         {
2061                                 TreeServer* CheckDupe = FindServer(sname);
2062                                 if (CheckDupe)
2063                                 {
2064                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2065                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2066                                         return false;
2067                                 }
2068                                 // Begin the sync here. this kickstarts the
2069                                 // other side, waiting in WAIT_AUTH_2 state,
2070                                 // into starting their burst, as it shows
2071                                 // that we're happy.
2072                                 this->LinkState = CONNECTED;
2073                                 // we should add the details of this server now
2074                                 // to the servers tree, as a child of the root
2075                                 // node.
2076                                 TreeServer* Node = new TreeServer(sname,description,TreeRoot,this);
2077                                 TreeRoot->AddChild(Node);
2078                                 params[3] = ":" + params[3];
2079                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2080                                 this->bursting = true;
2081                                 this->DoBurst(Node);
2082                                 return true;
2083                         }
2084                 }
2085                 this->WriteLine("ERROR :Invalid credentials");
2086                 Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2087                 return false;
2088         }
2089
2090         bool Inbound_Server(std::deque<std::string> &params)
2091         {
2092                 if (params.size() < 4)
2093                         return false;
2094
2095                 irc::string servername = params[0].c_str();
2096                 std::string sname = params[0];
2097                 std::string password = params[1];
2098                 int hops = atoi(params[2].c_str());
2099
2100                 if (hops)
2101                 {
2102                         this->WriteLine("ERROR :Server too far away for authentication");
2103                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2104                         return false;
2105                 }
2106                 std::string description = params[3];
2107                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2108                 {
2109                         if ((x->Name == servername) && (x->RecvPass == password))
2110                         {
2111                                 TreeServer* CheckDupe = FindServer(sname);
2112                                 if (CheckDupe)
2113                                 {
2114                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2115                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2116                                         return false;
2117                                 }
2118                                 /* If the config says this link is encrypted, but the remote side
2119                                  * hasnt bothered to send the AES command before SERVER, then we
2120                                  * boot them off as we MUST have this connection encrypted.
2121                                  */
2122                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2123                                 {
2124                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2125                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2126                                         return false;
2127                                 }
2128                                 Srv->SendOpers("*** Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2129                                 this->InboundServerName = sname;
2130                                 this->InboundDescription = description;
2131                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2132                                 // along with the sendpass from this block.
2133                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
2134                                 // move to the next state, we are now waiting for THEM.
2135                                 this->LinkState = WAIT_AUTH_2;
2136                                 return true;
2137                         }
2138                 }
2139                 this->WriteLine("ERROR :Invalid credentials");
2140                 Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2141                 return false;
2142         }
2143
2144         void Split(std::string line, bool stripcolon, std::deque<std::string> &n)
2145         {
2146                 // we don't do anything with a line > 2048
2147                 if (line.length() > 2048)
2148                 {
2149                         log(DEBUG,"Line too long!");
2150                         return;
2151                 }
2152                 if (!strchr(line.c_str(),' '))
2153                 {
2154                         n.push_back(line);
2155                         return;
2156                 }
2157                 std::stringstream s(line);
2158                 int count = 0;
2159                 char param[1024];
2160                 char* pptr = param;
2161
2162                 n.clear();
2163                 int item = 0;
2164                 while (!s.eof())
2165                 {
2166                         char c = 0;
2167                         s.get(c);
2168                         if (c == ' ')
2169                         {
2170                                 *pptr = 0;
2171                                 if (*param)
2172                                         n.push_back(param);
2173                                 *param = count = 0;
2174                                 pptr = param;
2175                                 item++;
2176                         }
2177                         else
2178                         {
2179                                 if (!s.eof())
2180                                 {
2181                                         *pptr++ = c;
2182                                         count++;
2183                                 }
2184                                 if ((*param == ':') && (count == 1) && (item > 0))
2185                                 {
2186                                         *param = count = 0;
2187                                         pptr = param;
2188                                         while (!s.eof())
2189                                         {
2190                                                 s.get(c);
2191                                                 if (!s.eof())
2192                                                 {
2193                                                         *pptr++ = c;
2194                                                         count++;
2195                                                 }
2196                                         }
2197                                         *pptr = 0;
2198                                         n.push_back(param);
2199                                         *param = count = 0;
2200                                         pptr = param;
2201                                 }
2202                         }
2203                 }
2204                 *pptr = 0;
2205                 if (*param)
2206                 {
2207                         n.push_back(param);
2208                 }
2209
2210                 return;
2211         }
2212
2213         bool ProcessLine(std::string line)
2214         {
2215                 char* l = (char*)line.c_str();
2216                 for (char* x = l; *x; x++)
2217                 {
2218                         if ((*x == '\r') || (*x == '\n'))
2219                                 *x = 0;
2220                 }
2221                 if (!*l)
2222                         return true;
2223
2224                 log(DEBUG,"IN: %s",l);
2225
2226                 std::deque<std::string> params;
2227                 this->Split(l,true,params);
2228                 irc::string command = "";
2229                 std::string prefix = "";
2230                 if (((params[0].c_str())[0] == ':') && (params.size() > 1))
2231                 {
2232                         prefix = params[0];
2233                         command = params[1].c_str();
2234                         char* pref = (char*)prefix.c_str();
2235                         prefix = ++pref;
2236                         params.pop_front();
2237                         params.pop_front();
2238                 }
2239                 else
2240                 {
2241                         prefix = "";
2242                         command = params[0].c_str();
2243                         params.pop_front();
2244                 }
2245
2246                 if ((!this->ctx_in) && (command == "AES"))
2247                 {
2248                         std::string sserv = params[0];
2249                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2250                         {
2251                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2252                                 {
2253                                         this->InitAES(x->EncryptionKey,sserv);
2254                                 }
2255                         }
2256
2257                         return true;
2258                 }
2259                 else if ((this->ctx_in) && (command == "AES"))
2260                 {
2261                         WriteOpers("*** \2AES\2: Encryption already enabled on this connection yet %s is trying to enable it twice!",params[0].c_str());
2262                 }
2263
2264                 switch (this->LinkState)
2265                 {
2266                         TreeServer* Node;
2267
2268                         case WAIT_AUTH_1:
2269                                 // Waiting for SERVER command from remote server. Server initiating
2270                                 // the connection sends the first SERVER command, listening server
2271                                 // replies with theirs if its happy, then if the initiator is happy,
2272                                 // it starts to send its net sync, which starts the merge, otherwise
2273                                 // it sends an ERROR.
2274                                 if (command == "PASS")
2275                                 {
2276                                         /* Silently ignored */
2277                                 }
2278                                 else if (command == "SERVER")
2279                                 {
2280                                         return this->Inbound_Server(params);
2281                                 }
2282                                 else if (command == "ERROR")
2283                                 {
2284                                         return this->Error(params);
2285                                 }
2286                                 else if (command == "USER")
2287                                 {
2288                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2289                                         return false;
2290                                 }
2291                                 else if (command == "CAPAB")
2292                                 {
2293                                         return this->Capab(params);
2294                                 }
2295                                 else if ((command == "U") || (command == "S"))
2296                                 {
2297                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2298                                         return false;
2299                                 }
2300                                 else
2301                                 {
2302                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2303                                         return false;
2304                                 }
2305                         break;
2306                         case WAIT_AUTH_2:
2307                                 // Waiting for start of other side's netmerge to say they liked our
2308                                 // password.
2309                                 if (command == "SERVER")
2310                                 {
2311                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2312                                         // silently ignore.
2313                                         return true;
2314                                 }
2315                                 else if ((command == "U") || (command == "S"))
2316                                 {
2317                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2318                                         return false;
2319                                 }
2320                                 else if (command == "BURST")
2321                                 {
2322                                         if (params.size())
2323                                         {
2324                                                 /* If a time stamp is provided, try and check syncronization */
2325                                                 time_t THEM = atoi(params[0].c_str());
2326                                                 long delta = THEM-time(NULL);
2327                                                 if ((delta < -600) || (delta > 600))
2328                                                 {
2329                                                         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));
2330                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2331                                                         return false;
2332                                                 }
2333                                                 else if ((delta < -60) || (delta > 60))
2334                                                 {
2335                                                         WriteOpers("*** \2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2336                                                 }
2337                                         }
2338                                         this->LinkState = CONNECTED;
2339                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
2340                                         TreeRoot->AddChild(Node);
2341                                         params.clear();
2342                                         params.push_back(InboundServerName);
2343                                         params.push_back("*");
2344                                         params.push_back("1");
2345                                         params.push_back(":"+InboundDescription);
2346                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2347                                         this->bursting = true;
2348                                         this->DoBurst(Node);
2349                                 }
2350                                 else if (command == "ERROR")
2351                                 {
2352                                         return this->Error(params);
2353                                 }
2354                                 else if (command == "CAPAB")
2355                                 {
2356                                         return this->Capab(params);
2357                                 }
2358
2359                         break;
2360                         case LISTENER:
2361                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2362                                 return false;
2363                         break;
2364                         case CONNECTING:
2365                                 if (command == "SERVER")
2366                                 {
2367                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2368                                         // has just sent us their credentials. If we get this far, theyre
2369                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2370                                         // if we're happy with this, we should send our netburst which
2371                                         // kickstarts the merge.
2372                                         return this->Outbound_Reply_Server(params);
2373                                 }
2374                                 else if (command == "ERROR")
2375                                 {
2376                                         return this->Error(params);
2377                                 }
2378                         break;
2379                         case CONNECTED:
2380                                 // This is the 'authenticated' state, when all passwords
2381                                 // have been exchanged and anything past this point is taken
2382                                 // as gospel.
2383
2384                                 if (prefix != "")
2385                                 {
2386                                         std::string direction = prefix;
2387                                         userrec* t = Srv->FindNick(prefix);
2388                                         if (t)
2389                                         {
2390                                                 direction = t->server;
2391                                         }
2392                                         TreeServer* route_back_again = BestRouteTo(direction);
2393                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2394                                         {
2395                                                 if (route_back_again)
2396                                                         log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2397                                                 return true;
2398                                         }
2399
2400                                         /* Fix by brain:
2401                                          * When there is activity on the socket, reset the ping counter so
2402                                          * that we're not wasting bandwidth pinging an active server.
2403                                          */
2404                                         route_back_again->SetNextPingTime(time(NULL) + 120);
2405                                         route_back_again->SetPingFlag();
2406                                 }
2407
2408                                 if (command == "SVSMODE")
2409                                 {
2410                                         /* Services expects us to implement
2411                                          * SVSMODE. In inspircd its the same as
2412                                          * MODE anyway.
2413                                          */
2414                                         command = "MODE";
2415                                 }
2416                                 std::string target = "";
2417                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
2418                                  * working with std::string here.
2419                                  */
2420                                 if ((command == "NICK") && (params.size() > 1))
2421                                 {
2422                                         return this->IntroduceClient(prefix,params);
2423                                 }
2424                                 else if (command == "FJOIN")
2425                                 {
2426                                         return this->ForceJoin(prefix,params);
2427                                 }
2428                                 else if (command == "SYNCTS")
2429                                 {
2430                                         return this->SyncChannelTS(prefix,params);
2431                                 }
2432                                 else if (command == "SERVER")
2433                                 {
2434                                         return this->RemoteServer(prefix,params);
2435                                 }
2436                                 else if (command == "ERROR")
2437                                 {
2438                                         return this->Error(params);
2439                                 }
2440                                 else if (command == "OPERTYPE")
2441                                 {
2442                                         return this->OperType(prefix,params);
2443                                 }
2444                                 else if (command == "FMODE")
2445                                 {
2446                                         return this->ForceMode(prefix,params);
2447                                 }
2448                                 else if (command == "KILL")
2449                                 {
2450                                         return this->RemoteKill(prefix,params);
2451                                 }
2452                                 else if (command == "FTOPIC")
2453                                 {
2454                                         return this->ForceTopic(prefix,params);
2455                                 }
2456                                 else if (command == "REHASH")
2457                                 {
2458                                         return this->RemoteRehash(prefix,params);
2459                                 }
2460                                 else if (command == "METADATA")
2461                                 {
2462                                         return this->MetaData(prefix,params);
2463                                 }
2464                                 else if (command == "PING")
2465                                 {
2466                                         /*
2467                                          * We just got a ping from a server that's bursting.
2468                                          * This can't be right, so set them to not bursting, and
2469                                          * apply their lines.
2470                                          */
2471                                         if (this->bursting)
2472                                         {
2473                                                 this->bursting = false;
2474                                                 apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2475                                         }
2476                                         if (prefix == "")
2477                                         {
2478                                                 prefix = this->GetName();
2479                                         }
2480                                         return this->LocalPing(prefix,params);
2481                                 }
2482                                 else if (command == "PONG")
2483                                 {
2484                                         /*
2485                                          * We just got a pong from a server that's bursting.
2486                                          * This can't be right, so set them to not bursting, and
2487                                          * apply their lines.
2488                                          */
2489                                         if (this->bursting)
2490                                         {
2491                                                 this->bursting = false;
2492                                                 apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2493                                         }
2494                                         if (prefix == "")
2495                                         {
2496                                                 prefix = this->GetName();
2497                                         }
2498                                         return this->LocalPong(prefix,params);
2499                                 }
2500                                 else if (command == "VERSION")
2501                                 {
2502                                         return this->ServerVersion(prefix,params);
2503                                 }
2504                                 else if (command == "FHOST")
2505                                 {
2506                                         return this->ChangeHost(prefix,params);
2507                                 }
2508                                 else if (command == "FNAME")
2509                                 {
2510                                         return this->ChangeName(prefix,params);
2511                                 }
2512                                 else if (command == "ADDLINE")
2513                                 {
2514                                         return this->AddLine(prefix,params);
2515                                 }
2516                                 else if (command == "SVSNICK")
2517                                 {
2518                                         if (prefix == "")
2519                                         {
2520                                                 prefix = this->GetName();
2521                                         }
2522                                         return this->ForceNick(prefix,params);
2523                                 }
2524                                 else if (command == "IDLE")
2525                                 {
2526                                         return this->Whois(prefix,params);
2527                                 }
2528                                 else if (command == "PUSH")
2529                                 {
2530                                         return this->Push(prefix,params);
2531                                 }
2532                                 else if (command == "TIME")
2533                                 {
2534                                         return this->Time(prefix,params);
2535                                 }
2536                                 else if ((command == "KICK") && (IsServer(prefix)))
2537                                 {
2538                                         std::string sourceserv = this->myhost;
2539                                         if (params.size() == 3)
2540                                         {
2541                                                 userrec* user = Srv->FindNick(params[1]);
2542                                                 chanrec* chan = Srv->FindChannel(params[0]);
2543                                                 if (user && chan)
2544                                                 {
2545                                                         server_kick_channel(user,chan,(char*)params[2].c_str(),false);
2546                                                 }
2547                                         }
2548                                         if (this->InboundServerName != "")
2549                                         {
2550                                                 sourceserv = this->InboundServerName;
2551                                         }
2552                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2553                                 }
2554                                 else if (command == "SVSJOIN")
2555                                 {
2556                                         if (prefix == "")
2557                                         {
2558                                                 prefix = this->GetName();
2559                                         }
2560                                         return this->ServiceJoin(prefix,params);
2561                                 }
2562                                 else if (command == "SQUIT")
2563                                 {
2564                                         if (params.size() == 2)
2565                                         {
2566                                                 this->Squit(FindServer(params[0]),params[1]);
2567                                         }
2568                                         return true;
2569                                 }
2570                                 else if (command == "ENDBURST")
2571                                 {
2572                                         this->bursting = false;
2573                                         apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2574                                         std::string sourceserv = this->myhost;
2575                                         if (this->InboundServerName != "")
2576                                         {
2577                                                 sourceserv = this->InboundServerName;
2578                                         }
2579                                         WriteOpers("*** Received end of netburst from \2%s\2",sourceserv.c_str());
2580                                         return true;
2581                                 }
2582                                 else
2583                                 {
2584                                         // not a special inter-server command.
2585                                         // Emulate the actual user doing the command,
2586                                         // this saves us having a huge ugly parser.
2587                                         userrec* who = Srv->FindNick(prefix);
2588                                         std::string sourceserv = this->myhost;
2589                                         if (this->InboundServerName != "")
2590                                         {
2591                                                 sourceserv = this->InboundServerName;
2592                                         }
2593                                         if (who)
2594                                         {
2595                                                 if (command == "QUIT")
2596                                                 {
2597                                                         TreeServer* s = FindServer(who->server);
2598                                                         if (s)
2599                                                         {
2600                                                                 s->DelUser(who);
2601                                                         }
2602                                                 }
2603                                                 else if ((command == "NICK") && (params.size() > 0))
2604                                                 {
2605                                                         /* On nick messages, check that the nick doesnt
2606                                                          * already exist here. If it does, kill their copy,
2607                                                          * and our copy.
2608                                                          */
2609                                                         userrec* x = Srv->FindNick(params[0]);
2610                                                         if ((x) && (x != who))
2611                                                         {
2612                                                                 std::deque<std::string> p;
2613                                                                 p.push_back(params[0]);
2614                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
2615                                                                 DoOneToMany(Srv->GetServerName(),"KILL",p);
2616                                                                 p.clear();
2617                                                                 p.push_back(prefix);
2618                                                                 p.push_back("Nickname collision");
2619                                                                 DoOneToMany(Srv->GetServerName(),"KILL",p);
2620                                                                 Srv->QuitUser(x,"Nickname collision ("+prefix+" -> "+params[0]+")");
2621                                                                 userrec* y = Srv->FindNick(prefix);
2622                                                                 if (y)
2623                                                                 {
2624                                                                         Srv->QuitUser(y,"Nickname collision");
2625                                                                 }
2626                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2627                                                         }
2628                                                 }
2629                                                 // its a user
2630                                                 target = who->server;
2631                                                 char* strparams[127];
2632                                                 for (unsigned int q = 0; q < params.size(); q++)
2633                                                 {
2634                                                         strparams[q] = (char*)params[q].c_str();
2635                                                 }
2636                                                 if (!Srv->CallCommandHandler(command.c_str(), strparams, params.size(), who))
2637                                                 {
2638                                                         this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
2639                                                         return false;
2640                                                 }
2641                                         }
2642                                         else
2643                                         {
2644                                                 // its not a user. Its either a server, or somethings screwed up.
2645                                                 if (IsServer(prefix))
2646                                                 {
2647                                                         target = Srv->GetServerName();
2648                                                 }
2649                                                 else
2650                                                 {
2651                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
2652                                                         return true;
2653                                                 }
2654                                         }
2655                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2656
2657                                 }
2658                                 return true;
2659                         break;
2660                 }
2661                 return true;
2662         }
2663
2664         virtual std::string GetName()
2665         {
2666                 std::string sourceserv = this->myhost;
2667                 if (this->InboundServerName != "")
2668                 {
2669                         sourceserv = this->InboundServerName;
2670                 }
2671                 return sourceserv;
2672         }
2673
2674         virtual void OnTimeout()
2675         {
2676                 if (this->LinkState == CONNECTING)
2677                 {
2678                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
2679                 }
2680         }
2681
2682         virtual void OnClose()
2683         {
2684                 // Connection closed.
2685                 // If the connection is fully up (state CONNECTED)
2686                 // then propogate a netsplit to all peers.
2687                 std::string quitserver = this->myhost;
2688                 if (this->InboundServerName != "")
2689                 {
2690                         quitserver = this->InboundServerName;
2691                 }
2692                 TreeServer* s = FindServer(quitserver);
2693                 if (s)
2694                 {
2695                         Squit(s,"Remote host closed the connection");
2696                 }
2697                 WriteOpers("Server '\2%s\2' closed the connection.",quitserver.c_str());
2698         }
2699
2700         virtual int OnIncomingConnection(int newsock, char* ip)
2701         {
2702                 TreeSocket* s = new TreeSocket(newsock, ip);
2703                 Srv->AddSocket(s);
2704                 return true;
2705         }
2706 };
2707
2708 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
2709 {
2710         for (unsigned int c = 0; c < list.size(); c++)
2711         {
2712                 if (list[c] == server)
2713                 {
2714                         return;
2715                 }
2716         }
2717         list.push_back(server);
2718 }
2719
2720 // returns a list of DIRECT servernames for a specific channel
2721 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
2722 {
2723         CUList *ulist = c->GetUsers();
2724         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2725         {
2726                 if (i->second->fd < 0)
2727                 {
2728                         TreeServer* best = BestRouteTo(i->second->server);
2729                         if (best)
2730                                 AddThisServer(best,list);
2731                 }
2732         }
2733         return;
2734 }
2735
2736 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
2737 {
2738         TreeServer* omitroute = BestRouteTo(omit);
2739         if ((command == "NOTICE") || (command == "PRIVMSG"))
2740         {
2741                 if ((params.size() >= 2) && (*(params[0].c_str()) != '$'))
2742                 {
2743                         /* Prefixes */
2744                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
2745                         {
2746                                 params[0] = params[0].substr(1, params[0].length()-1);
2747                         }
2748                         if (*(params[0].c_str()) != '#')
2749                         {
2750                                 // special routing for private messages/notices
2751                                 userrec* d = Srv->FindNick(params[0]);
2752                                 if (d)
2753                                 {
2754                                         std::deque<std::string> par;
2755                                         par.push_back(params[0]);
2756                                         par.push_back(":"+params[1]);
2757                                         DoOneToOne(prefix,command.c_str(),par,d->server);
2758                                         return true;
2759                                 }
2760                         }
2761                         else
2762                         {
2763                                 log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
2764                                 chanrec* c = Srv->FindChannel(params[0]);
2765                                 if (c)
2766                                 {
2767                                         std::deque<TreeServer*> list;
2768                                         GetListOfServersForChannel(c,list);
2769                                         log(DEBUG,"Got a list of %d servers",list.size());
2770                                         unsigned int lsize = list.size();
2771                                         for (unsigned int i = 0; i < lsize; i++)
2772                                         {
2773                                                 TreeSocket* Sock = list[i]->GetSocket();
2774                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
2775                                                 {
2776                                                         log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
2777                                                         Sock->WriteLine(data);
2778                                                 }
2779                                         }
2780                                         return true;
2781                                 }
2782                         }
2783                 }
2784         }
2785         unsigned int items = TreeRoot->ChildCount();
2786         for (unsigned int x = 0; x < items; x++)
2787         {
2788                 TreeServer* Route = TreeRoot->GetChild(x);
2789                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
2790                 {
2791                         TreeSocket* Sock = Route->GetSocket();
2792                         Sock->WriteLine(data);
2793                 }
2794         }
2795         return true;
2796 }
2797
2798 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
2799 {
2800         TreeServer* omitroute = BestRouteTo(omit);
2801         std::string FullLine = ":" + prefix + " " + command;
2802         unsigned int words = params.size();
2803         for (unsigned int x = 0; x < words; x++)
2804         {
2805                 FullLine = FullLine + " " + params[x];
2806         }
2807         unsigned int items = TreeRoot->ChildCount();
2808         for (unsigned int x = 0; x < items; x++)
2809         {
2810                 TreeServer* Route = TreeRoot->GetChild(x);
2811                 // Send the line IF:
2812                 // The route has a socket (its a direct connection)
2813                 // The route isnt the one to be omitted
2814                 // The route isnt the path to the one to be omitted
2815                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
2816                 {
2817                         TreeSocket* Sock = Route->GetSocket();
2818                         Sock->WriteLine(FullLine);
2819                 }
2820         }
2821         return true;
2822 }
2823
2824 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
2825 {
2826         std::string FullLine = ":" + prefix + " " + command;
2827         unsigned int words = params.size();
2828         for (unsigned int x = 0; x < words; x++)
2829         {
2830                 FullLine = FullLine + " " + params[x];
2831         }
2832         unsigned int items = TreeRoot->ChildCount();
2833         for (unsigned int x = 0; x < items; x++)
2834         {
2835                 TreeServer* Route = TreeRoot->GetChild(x);
2836                 if (Route->GetSocket())
2837                 {
2838                         TreeSocket* Sock = Route->GetSocket();
2839                         Sock->WriteLine(FullLine);
2840                 }
2841         }
2842         return true;
2843 }
2844
2845 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
2846 {
2847         TreeServer* Route = BestRouteTo(target);
2848         if (Route)
2849         {
2850                 std::string FullLine = ":" + prefix + " " + command;
2851                 unsigned int words = params.size();
2852                 for (unsigned int x = 0; x < words; x++)
2853                 {
2854                         FullLine = FullLine + " " + params[x];
2855                 }
2856                 if (Route->GetSocket())
2857                 {
2858                         TreeSocket* Sock = Route->GetSocket();
2859                         Sock->WriteLine(FullLine);
2860                 }
2861                 return true;
2862         }
2863         else
2864         {
2865                 return true;
2866         }
2867 }
2868
2869 std::vector<TreeSocket*> Bindings;
2870
2871 void ReadConfiguration(bool rebind)
2872 {
2873         Conf = new ConfigReader;
2874         if (rebind)
2875         {
2876                 for (int j =0; j < Conf->Enumerate("bind"); j++)
2877                 {
2878                         std::string Type = Conf->ReadValue("bind","type",j);
2879                         std::string IP = Conf->ReadValue("bind","address",j);
2880                         long Port = Conf->ReadInteger("bind","port",j,true);
2881                         if (Type == "servers")
2882                         {
2883                                 if (IP == "*")
2884                                 {
2885                                         IP = "";
2886                                 }
2887                                 TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
2888                                 if (listener->GetState() == I_LISTENING)
2889                                 {
2890                                         Srv->AddSocket(listener);
2891                                         Bindings.push_back(listener);
2892                                 }
2893                                 else
2894                                 {
2895                                         log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
2896                                         listener->Close();
2897                                         DELETE(listener);
2898                                 }
2899                         }
2900                 }
2901         }
2902         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
2903         HideULines = Conf->ReadFlag("options","hideulines",0);
2904         LinkBlocks.clear();
2905         for (int j =0; j < Conf->Enumerate("link"); j++)
2906         {
2907                 Link L;
2908                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
2909                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
2910                 L.Port = Conf->ReadInteger("link","port",j,true);
2911                 L.SendPass = Conf->ReadValue("link","sendpass",j);
2912                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
2913                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
2914                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
2915                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
2916                 L.NextConnectTime = time(NULL) + L.AutoConnect;
2917                 /* Bugfix by brain, do not allow people to enter bad configurations */
2918                 if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
2919                 {
2920                         LinkBlocks.push_back(L);
2921                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
2922                 }
2923                 else
2924                 {
2925                         if (L.IPAddr == "")
2926                         {
2927                                 log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
2928                         }
2929                         else if (L.RecvPass == "")
2930                         {
2931                                 log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
2932                         }
2933                         else if (L.SendPass == "")
2934                         {
2935                                 log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
2936                         }
2937                         else if (L.Name == "")
2938                         {
2939                                 log(DEFAULT,"Invalid configuration, link tag without a name!");
2940                         }
2941                         else if (!L.Port)
2942                         {
2943                                 log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
2944                         }
2945                 }
2946         }
2947         DELETE(Conf);
2948 }
2949
2950
2951 class ModuleSpanningTree : public Module
2952 {
2953         std::vector<TreeSocket*> Bindings;
2954         int line;
2955         int NumServers;
2956         unsigned int max_local;
2957         unsigned int max_global;
2958         cmd_rconnect* command_rconnect;
2959
2960  public:
2961
2962         ModuleSpanningTree(Server* Me)
2963                 : Module::Module(Me), max_local(0), max_global(0)
2964         {
2965                 Srv = Me;
2966                 Bindings.clear();
2967
2968                 // Create the root of the tree
2969                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
2970
2971                 ReadConfiguration(true);
2972
2973                 command_rconnect = new cmd_rconnect(this);
2974                 Srv->AddCommand(command_rconnect);
2975         }
2976
2977         void ShowLinks(TreeServer* Current, userrec* user, int hops)
2978         {
2979                 std::string Parent = TreeRoot->GetName();
2980                 if (Current->GetParent())
2981                 {
2982                         Parent = Current->GetParent()->GetName();
2983                 }
2984                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
2985                 {
2986                         if ((HideULines) && (Srv->IsUlined(Current->GetChild(q)->GetName())))
2987                         {
2988                                 if (*user->oper)
2989                                 {
2990                                          ShowLinks(Current->GetChild(q),user,hops+1);
2991                                 }
2992                         }
2993                         else
2994                         {
2995                                 ShowLinks(Current->GetChild(q),user,hops+1);
2996                         }
2997                 }
2998                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
2999                 if ((HideULines) && (Srv->IsUlined(Current->GetName())) && (!*user->oper))
3000                         return;
3001                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),(FlatLinks && (!*user->oper)) ? Srv->GetServerName().c_str() : Parent.c_str(),(FlatLinks && (!*user->oper)) ? 0 : hops,Current->GetDesc().c_str());
3002         }
3003
3004         int CountLocalServs()
3005         {
3006                 return TreeRoot->ChildCount();
3007         }
3008
3009         int CountServs()
3010         {
3011                 return serverlist.size();
3012         }
3013
3014         void HandleLinks(char** parameters, int pcnt, userrec* user)
3015         {
3016                 ShowLinks(TreeRoot,user,0);
3017                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
3018                 return;
3019         }
3020
3021         void HandleLusers(char** parameters, int pcnt, userrec* user)
3022         {
3023                 unsigned int n_users = usercnt();
3024
3025                 /* Only update these when someone wants to see them, more efficient */
3026                 if ((unsigned int)local_count() > max_local)
3027                         max_local = local_count();
3028                 if (n_users > max_global)
3029                         max_global = n_users;
3030
3031                 WriteServ(user->fd,"251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-usercount_invisible(),usercount_invisible(),this->CountServs());
3032                 WriteServ(user->fd,"252 %s %d :operator(s) online",user->nick,usercount_opers());
3033                 WriteServ(user->fd,"253 %s %d :unknown connections",user->nick,usercount_unknown());
3034                 WriteServ(user->fd,"254 %s %d :channels formed",user->nick,chancount());
3035                 WriteServ(user->fd,"254 %s :I have %d clients and %d servers",user->nick,local_count(),this->CountLocalServs());
3036                 WriteServ(user->fd,"265 %s :Current Local Users: %d  Max: %d",user->nick,local_count(),max_local);
3037                 WriteServ(user->fd,"266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3038                 return;
3039         }
3040
3041         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3042
3043         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3044         {
3045                 if (line < 128)
3046                 {
3047                         for (int t = 0; t < depth; t++)
3048                         {
3049                                 matrix[line][t] = ' ';
3050                         }
3051
3052                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3053                         // a 'Spacer' String to compensate.
3054                         char spacer[40];
3055
3056                         memset(spacer,' ',40);
3057                         if ((40 - Current->GetName().length() - depth) > 1) {
3058                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3059                         }
3060                         else
3061                         {
3062                                 spacer[5] = '\0';
3063                         }
3064
3065                         float percent;
3066                         char text[80];
3067                         if (clientlist.size() == 0) {
3068                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3069                                 percent = 0;
3070                         }
3071                         else
3072                         {
3073                                 percent = ((float)Current->GetUserCount() / (float)clientlist.size()) * 100;
3074                         }
3075                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3076                         totusers += Current->GetUserCount();
3077                         totservers++;
3078                         strlcpy(&matrix[line][depth],text,80);
3079                         line++;
3080                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3081                         {
3082                                 if ((HideULines) && (Srv->IsUlined(Current->GetChild(q)->GetName())))
3083                                 {
3084                                         if (*user->oper)
3085                                         {
3086                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3087                                         }
3088                                 }
3089                                 else
3090                                 {
3091                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3092                                 }
3093                         }
3094                 }
3095         }
3096
3097         // Ok, prepare to be confused.
3098         // After much mulling over how to approach this, it struck me that
3099         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3100         // keeping track of a ton of ascii characters, and line by line
3101         // under recursion working out where to place them using multiplications
3102         // and divisons, we instead render the map onto a backplane of characters
3103         // (a character matrix), then draw the branches as a series of "L" shapes
3104         // from the nodes. This is not only friendlier on CPU it uses less stack.
3105
3106         void HandleMap(char** parameters, int pcnt, userrec* user)
3107         {
3108                 // This array represents a virtual screen which we will
3109                 // "scratch" draw to, as the console device of an irc
3110                 // client does not provide for a proper terminal.
3111                 float totusers = 0;
3112                 float totservers = 0;
3113                 char matrix[128][80];
3114                 for (unsigned int t = 0; t < 128; t++)
3115                 {
3116                         matrix[t][0] = '\0';
3117                 }
3118                 line = 0;
3119                 // The only recursive bit is called here.
3120                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3121                 // Process each line one by one. The algorithm has a limit of
3122                 // 128 servers (which is far more than a spanning tree should have
3123                 // anyway, so we're ok). This limit can be raised simply by making
3124                 // the character matrix deeper, 128 rows taking 10k of memory.
3125                 for (int l = 1; l < line; l++)
3126                 {
3127                         // scan across the line looking for the start of the
3128                         // servername (the recursive part of the algorithm has placed
3129                         // the servers at indented positions depending on what they
3130                         // are related to)
3131                         int first_nonspace = 0;
3132                         while (matrix[l][first_nonspace] == ' ')
3133                         {
3134                                 first_nonspace++;
3135                         }
3136                         first_nonspace--;
3137                         // Draw the `- (corner) section: this may be overwritten by
3138                         // another L shape passing along the same vertical pane, becoming
3139                         // a |- (branch) section instead.
3140                         matrix[l][first_nonspace] = '-';
3141                         matrix[l][first_nonspace-1] = '`';
3142                         int l2 = l - 1;
3143                         // Draw upwards until we hit the parent server, causing possibly
3144                         // other corners (`-) to become branches (|-)
3145                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3146                         {
3147                                 matrix[l2][first_nonspace-1] = '|';
3148                                 l2--;
3149                         }
3150                 }
3151                 // dump the whole lot to the user. This is the easy bit, honest.
3152                 for (int t = 0; t < line; t++)
3153                 {
3154                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
3155                 }
3156                 float avg_users = totusers / totservers;
3157                 WriteServ(user->fd,"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);
3158         WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
3159                 return;
3160         }
3161
3162         int HandleSquit(char** parameters, int pcnt, userrec* user)
3163         {
3164                 TreeServer* s = FindServerMask(parameters[0]);
3165                 if (s)
3166                 {
3167                         if (s == TreeRoot)
3168                         {
3169                                  WriteServ(user->fd,"NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
3170                                 return 1;
3171                         }
3172                         TreeSocket* sock = s->GetSocket();
3173                         if (sock)
3174                         {
3175                                 log(DEBUG,"Splitting server %s",s->GetName().c_str());
3176                                 WriteOpers("*** SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
3177                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
3178                                 Srv->RemoveSocket(sock);
3179                         }
3180                         else
3181                         {
3182                                 WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
3183                         }
3184                 }
3185                 else
3186                 {
3187                          WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
3188                 }
3189                 return 1;
3190         }
3191
3192         int HandleTime(char** parameters, int pcnt, userrec* user)
3193         {
3194                 if ((user->fd > -1) && (pcnt))
3195                 {
3196                         TreeServer* found = FindServerMask(parameters[0]);
3197                         if (found)
3198                         {
3199                                 // we dont' override for local server
3200                                 if (found == TreeRoot)
3201                                         return 0;
3202
3203                                 std::deque<std::string> params;
3204                                 params.push_back(found->GetName());
3205                                 params.push_back(user->nick);
3206                                 DoOneToOne(Srv->GetServerName(),"TIME",params,found->GetName());
3207                         }
3208                         else
3209                         {
3210                                 WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
3211                         }
3212                 }
3213                 return 1;
3214         }
3215
3216         int HandleRemoteWhois(char** parameters, int pcnt, userrec* user)
3217         {
3218                 if ((user->fd > -1) && (pcnt > 1))
3219                 {
3220                         userrec* remote = Srv->FindNick(parameters[1]);
3221                         if ((remote) && (remote->fd < 0))
3222                         {
3223                                 std::deque<std::string> params;
3224                                 params.push_back(parameters[1]);
3225                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
3226                                 return 1;
3227                         }
3228                         else if (!remote)
3229                         {
3230                                 WriteServ(user->fd,"401 %s %s :No such nick/channel",user->nick, parameters[1]);
3231                                 WriteServ(user->fd,"318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
3232                                 return 1;
3233                         }
3234                 }
3235                 return 0;
3236         }
3237
3238         void DoPingChecks(time_t curtime)
3239         {
3240                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
3241                 {
3242                         TreeServer* serv = TreeRoot->GetChild(j);
3243                         TreeSocket* sock = serv->GetSocket();
3244                         if (sock)
3245                         {
3246                                 if (curtime >= serv->NextPingTime())
3247                                 {
3248                                         if (serv->AnsweredLastPing())
3249                                         {
3250                                                 sock->WriteLine(":"+Srv->GetServerName()+" PING "+serv->GetName());
3251                                                 serv->SetNextPingTime(curtime + 120);
3252                                         }
3253                                         else
3254                                         {
3255                                                 // they didnt answer, boot them
3256                                                 WriteOpers("*** Server \002%s\002 pinged out",serv->GetName().c_str());
3257                                                 sock->Squit(serv,"Ping timeout");
3258                                                 Srv->RemoveSocket(sock);
3259                                                 return;
3260                                         }
3261                                 }
3262                         }
3263                 }
3264         }
3265
3266         void AutoConnectServers(time_t curtime)
3267         {
3268                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3269                 {
3270                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
3271                         {
3272                                 log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
3273                                 x->NextConnectTime = curtime + x->AutoConnect;
3274                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3275                                 if (!CheckDupe)
3276                                 {
3277                                         // an autoconnected server is not connected. Check if its time to connect it
3278                                         WriteOpers("*** AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
3279                                         TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name.c_str());
3280                                         if (newsocket->GetFd() > -1)
3281                                         {
3282                                                 Srv->AddSocket(newsocket);
3283                                         }
3284                                         else
3285                                         {
3286                                                 WriteOpers("*** AUTOCONNECT: Error autoconnecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
3287                                                 DELETE(newsocket);
3288                                         }
3289                                 }
3290                         }
3291                 }
3292         }
3293
3294         int HandleVersion(char** parameters, int pcnt, userrec* user)
3295         {
3296                 // we've already checked if pcnt > 0, so this is safe
3297                 TreeServer* found = FindServerMask(parameters[0]);
3298                 if (found)
3299                 {
3300                         std::string Version = found->GetVersion();
3301                         WriteServ(user->fd,"351 %s :%s",user->nick,Version.c_str());
3302                         if (found == TreeRoot)
3303                         {
3304                                 std::stringstream out(Config->data005);
3305                                 std::string token = "";
3306                                 std::string line5 = "";
3307                                 int token_counter = 0;
3308
3309                                 while (!out.eof())
3310                                 {
3311                                         out >> token;
3312                                         line5 = line5 + token + " ";
3313                                         token_counter++;
3314
3315                                         if ((token_counter >= 13) || (out.eof() == true))
3316                                         {
3317                                                 WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
3318                                                 line5 = "";
3319                                                 token_counter = 0;
3320                                         }
3321                                 }
3322                         }
3323                 }
3324                 else
3325                 {
3326                         WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
3327                 }
3328                 return 1;
3329         }
3330
3331         int HandleConnect(char** parameters, int pcnt, userrec* user)
3332         {
3333                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3334                 {
3335                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
3336                         {
3337                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3338                                 if (!CheckDupe)
3339                                 {
3340                                         WriteServ(user->fd,"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);
3341                                         TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name.c_str());
3342                                         if (newsocket->GetFd() > -1)
3343                                         {
3344                                                 Srv->AddSocket(newsocket);
3345                                         }
3346                                         else
3347                                         {
3348                                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Error connecting \002%s\002: %s.",user->nick,x->Name.c_str(),strerror(errno));
3349                                                 DELETE(newsocket);
3350                                         }
3351                                         return 1;
3352                                 }
3353                                 else
3354                                 {
3355                                         WriteServ(user->fd,"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());
3356                                         return 1;
3357                                 }
3358                         }
3359                 }
3360                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
3361                 return 1;
3362         }
3363
3364         virtual int OnStats(char statschar, userrec* user)
3365         {
3366                 if (statschar == 'c')
3367                 {
3368                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
3369                         {
3370                                 WriteServ(user->fd,"213 %s C *@%s * %s %d 0 %c%c%c",user->nick,(LinkBlocks[i].HiddenFromStats ? "<hidden>" : LinkBlocks[i].IPAddr).c_str(),LinkBlocks[i].Name.c_str(),LinkBlocks[i].Port,(LinkBlocks[i].EncryptionKey != "" ? 'e' : '-'),(LinkBlocks[i].AutoConnect ? 'a' : '-'),'s');
3371                                 WriteServ(user->fd,"244 %s H * * %s",user->nick,LinkBlocks[i].Name.c_str());
3372                         }
3373                         WriteServ(user->fd,"219 %s %c :End of /STATS report",user->nick,statschar);
3374                         WriteOpers("*** Notice: Stats '%c' requested by %s (%s@%s)",statschar,user->nick,user->ident,user->host);
3375                         return 1;
3376                 }
3377                 return 0;
3378         }
3379
3380         virtual int OnPreCommand(const std::string &command, char **parameters, int pcnt, userrec *user, bool validated)
3381         {
3382                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
3383                 if (!validated)
3384                         return 0;
3385
3386                 if (command == "CONNECT")
3387                 {
3388                         return this->HandleConnect(parameters,pcnt,user);
3389                 }
3390                 else if (command == "SQUIT")
3391                 {
3392                         return this->HandleSquit(parameters,pcnt,user);
3393                 }
3394                 else if (command == "MAP")
3395                 {
3396                         this->HandleMap(parameters,pcnt,user);
3397                         return 1;
3398                 }
3399                 else if ((command == "TIME") && (pcnt > 0))
3400                 {
3401                         return this->HandleTime(parameters,pcnt,user);
3402                 }
3403                 else if (command == "LUSERS")
3404                 {
3405                         this->HandleLusers(parameters,pcnt,user);
3406                         return 1;
3407                 }
3408                 else if (command == "LINKS")
3409                 {
3410                         this->HandleLinks(parameters,pcnt,user);
3411                         return 1;
3412                 }
3413                 else if (command == "WHOIS")
3414                 {
3415                         if (pcnt > 1)
3416                         {
3417                                 // remote whois
3418                                 return this->HandleRemoteWhois(parameters,pcnt,user);
3419                         }
3420                 }
3421                 else if ((command == "VERSION") && (pcnt > 0))
3422                 {
3423                         this->HandleVersion(parameters,pcnt,user);
3424                         return 1;
3425                 }
3426                 else if (Srv->IsValidModuleCommand(command, pcnt, user))
3427                 {
3428                         // this bit of code cleverly routes all module commands
3429                         // to all remote severs *automatically* so that modules
3430                         // can just handle commands locally, without having
3431                         // to have any special provision in place for remote
3432                         // commands and linking protocols.
3433                         std::deque<std::string> params;
3434                         params.clear();
3435                         for (int j = 0; j < pcnt; j++)
3436                         {
3437                                 if (strchr(parameters[j],' '))
3438                                 {
3439                                         params.push_back(":" + std::string(parameters[j]));
3440                                 }
3441                                 else
3442                                 {
3443                                         params.push_back(std::string(parameters[j]));
3444                                 }
3445                         }
3446                         log(DEBUG,"Globally route '%s'",command.c_str());
3447                         DoOneToMany(user->nick,command,params);
3448                 }
3449                 return 0;
3450         }
3451
3452         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
3453         {
3454                 TreeServer* s = FindServer(servername);
3455                 if (s)
3456                 {
3457                         description = s->GetDesc();
3458                 }
3459         }
3460
3461         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
3462         {
3463                 if (source->fd > -1)
3464                 {
3465                         std::deque<std::string> params;
3466                         params.push_back(dest->nick);
3467                         params.push_back(channel->name);
3468                         DoOneToMany(source->nick,"INVITE",params);
3469                 }
3470         }
3471
3472         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
3473         {
3474                 std::deque<std::string> params;
3475                 params.push_back(chan->name);
3476                 params.push_back(":"+topic);
3477                 DoOneToMany(user->nick,"TOPIC",params);
3478         }
3479
3480         virtual void OnWallops(userrec* user, const std::string &text)
3481         {
3482                 if (user->fd > -1)
3483                 {
3484                         std::deque<std::string> params;
3485                         params.push_back(":"+text);
3486                         DoOneToMany(user->nick,"WALLOPS",params);
3487                 }
3488         }
3489
3490         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
3491         {
3492                 if (target_type == TYPE_USER)
3493                 {
3494                         userrec* d = (userrec*)dest;
3495                         if ((d->fd < 0) && (user->fd > -1))
3496                         {
3497                                 std::deque<std::string> params;
3498                                 params.clear();
3499                                 params.push_back(d->nick);
3500                                 params.push_back(":"+text);
3501                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
3502                         }
3503                 }
3504                 else
3505                 {
3506                         if (user->fd > -1)
3507                         {
3508                                 chanrec *c = (chanrec*)dest;
3509                                 std::string cname = c->name;
3510                                 if (status)
3511                                         cname = status + cname;
3512                                 std::deque<TreeServer*> list;
3513                                 GetListOfServersForChannel(c,list);
3514                                 unsigned int ucount = list.size();
3515                                 for (unsigned int i = 0; i < ucount; i++)
3516                                 {
3517                                         TreeSocket* Sock = list[i]->GetSocket();
3518                                         if (Sock)
3519                                                 Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
3520                                 }
3521                         }
3522                 }
3523         }
3524
3525         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
3526         {
3527                 if (target_type == TYPE_USER)
3528                 {
3529                         // route private messages which are targetted at clients only to the server
3530                         // which needs to receive them
3531                         userrec* d = (userrec*)dest;
3532                         if ((d->fd < 0) && (user->fd > -1))
3533                         {
3534                                 std::deque<std::string> params;
3535                                 params.clear();
3536                                 params.push_back(d->nick);
3537                                 params.push_back(":"+text);
3538                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
3539                         }
3540                 }
3541                 else
3542                 {
3543                         if (user->fd > -1)
3544                         {
3545                                 chanrec *c = (chanrec*)dest;
3546                                 std::string cname = c->name;
3547                                 if (status)
3548                                         cname = status + cname;
3549                                 std::deque<TreeServer*> list;
3550                                 GetListOfServersForChannel(c,list);
3551                                 unsigned int ucount = list.size();
3552                                 for (unsigned int i = 0; i < ucount; i++)
3553                                 {
3554                                         TreeSocket* Sock = list[i]->GetSocket();
3555                                         if (Sock)
3556                                                 Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
3557                                 }
3558                         }
3559                 }
3560         }
3561
3562         virtual void OnBackgroundTimer(time_t curtime)
3563         {
3564                 AutoConnectServers(curtime);
3565                 DoPingChecks(curtime);
3566         }
3567
3568         virtual void OnUserJoin(userrec* user, chanrec* channel)
3569         {
3570                 // Only do this for local users
3571                 if (user->fd > -1)
3572                 {
3573                         std::deque<std::string> params;
3574                         params.clear();
3575                         params.push_back(channel->name);
3576
3577                         if (channel->GetUserCounter() > 1)
3578                         {
3579                                 // not the first in the channel
3580                                 DoOneToMany(user->nick,"JOIN",params);
3581                         }
3582                         else
3583                         {
3584                                 // first in the channel, set up their permissions
3585                                 // and the channel TS with FJOIN.
3586                                 char ts[24];
3587                                 snprintf(ts,24,"%lu",(unsigned long)channel->age);
3588                                 params.clear();
3589                                 params.push_back(channel->name);
3590                                 params.push_back(ts);
3591                                 params.push_back("@"+std::string(user->nick));
3592                                 DoOneToMany(Srv->GetServerName(),"FJOIN",params);
3593                         }
3594                 }
3595         }
3596
3597         virtual void OnChangeHost(userrec* user, const std::string &newhost)
3598         {
3599                 // only occurs for local clients
3600                 if (user->registered != 7)
3601                         return;
3602                 std::deque<std::string> params;
3603                 params.push_back(newhost);
3604                 DoOneToMany(user->nick,"FHOST",params);
3605         }
3606
3607         virtual void OnChangeName(userrec* user, const std::string &gecos)
3608         {
3609                 // only occurs for local clients
3610                 if (user->registered != 7)
3611                         return;
3612                 std::deque<std::string> params;
3613                 params.push_back(gecos);
3614                 DoOneToMany(user->nick,"FNAME",params);
3615         }
3616
3617         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
3618         {
3619                 if (user->fd > -1)
3620                 {
3621                         std::deque<std::string> params;
3622                         params.push_back(channel->name);
3623                         if (partmessage != "")
3624                                 params.push_back(":"+partmessage);
3625                         DoOneToMany(user->nick,"PART",params);
3626                 }
3627         }
3628
3629         virtual void OnUserConnect(userrec* user)
3630         {
3631                 char agestr[MAXBUF];
3632                 if (user->fd > -1)
3633                 {
3634                         std::deque<std::string> params;
3635                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
3636                         params.push_back(agestr);
3637                         params.push_back(user->nick);
3638                         params.push_back(user->host);
3639                         params.push_back(user->dhost);
3640                         params.push_back(user->ident);
3641                         params.push_back("+"+std::string(user->modes));
3642                         params.push_back((char*)inet_ntoa(user->ip4));
3643                         params.push_back(":"+std::string(user->fullname));
3644                         DoOneToMany(Srv->GetServerName(),"NICK",params);
3645
3646                         // User is Local, change needs to be reflected!
3647                         TreeServer* SourceServer = FindServer(user->server);
3648                         if (SourceServer)
3649                         {
3650                                 SourceServer->AddUserCount();
3651                         }
3652
3653                 }
3654         }
3655
3656         virtual void OnUserQuit(userrec* user, const std::string &reason)
3657         {
3658                 if ((user->fd > -1) && (user->registered == 7))
3659                 {
3660                         std::deque<std::string> params;
3661                         params.push_back(":"+reason);
3662                         DoOneToMany(user->nick,"QUIT",params);
3663                 }
3664                 // Regardless, We need to modify the user Counts..
3665                 TreeServer* SourceServer = FindServer(user->server);
3666                 if (SourceServer)
3667                 {
3668                         SourceServer->DelUserCount();
3669                 }
3670
3671         }
3672
3673         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
3674         {
3675                 if (user->fd > -1)
3676                 {
3677                         std::deque<std::string> params;
3678                         params.push_back(user->nick);
3679                         DoOneToMany(oldnick,"NICK",params);
3680                 }
3681         }
3682
3683         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
3684         {
3685                 if ((source) && (source->fd > -1))
3686                 {
3687                         std::deque<std::string> params;
3688                         params.push_back(chan->name);
3689                         params.push_back(user->nick);
3690                         params.push_back(":"+reason);
3691                         DoOneToMany(source->nick,"KICK",params);
3692                 }
3693                 else if (!source)
3694                 {
3695                         std::deque<std::string> params;
3696                         params.push_back(chan->name);
3697                         params.push_back(user->nick);
3698                         params.push_back(":"+reason);
3699                         DoOneToMany(Srv->GetServerName(),"KICK",params);
3700                 }
3701         }
3702
3703         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
3704         {
3705                 std::deque<std::string> params;
3706                 params.push_back(dest->nick);
3707                 params.push_back(":"+reason);
3708                 DoOneToMany(source->nick,"KILL",params);
3709         }
3710
3711         virtual void OnRehash(const std::string &parameter)
3712         {
3713                 if (parameter != "")
3714                 {
3715                         std::deque<std::string> params;
3716                         params.push_back(parameter);
3717                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
3718                         // check for self
3719                         if (Srv->MatchText(Srv->GetServerName(),parameter))
3720                         {
3721                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
3722                                 Srv->RehashServer();
3723                         }
3724                 }
3725                 ReadConfiguration(false);
3726         }
3727
3728         // note: the protocol does not allow direct umode +o except
3729         // via NICK with 8 params. sending OPERTYPE infers +o modechange
3730         // locally.
3731         virtual void OnOper(userrec* user, const std::string &opertype)
3732         {
3733                 if (user->fd > -1)
3734                 {
3735                         std::deque<std::string> params;
3736                         params.push_back(opertype);
3737                         DoOneToMany(user->nick,"OPERTYPE",params);
3738                 }
3739         }
3740
3741         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
3742         {
3743                 if (source->fd > -1)
3744                 {
3745                         char type[8];
3746                         snprintf(type,8,"%cLINE",linetype);
3747                         std::string stype = type;
3748                         if (adding)
3749                         {
3750                                 char sduration[MAXBUF];
3751                                 snprintf(sduration,MAXBUF,"%ld",duration);
3752                                 std::deque<std::string> params;
3753                                 params.push_back(host);
3754                                 params.push_back(sduration);
3755                                 params.push_back(":"+reason);
3756                                 DoOneToMany(source->nick,stype,params);
3757                         }
3758                         else
3759                         {
3760                                 std::deque<std::string> params;
3761                                 params.push_back(host);
3762                                 DoOneToMany(source->nick,stype,params);
3763                         }
3764                 }
3765         }
3766
3767         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
3768         {
3769                 OnLine(source,hostmask,true,'G',duration,reason);
3770         }
3771
3772         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
3773         {
3774                 OnLine(source,ipmask,true,'Z',duration,reason);
3775         }
3776
3777         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
3778         {
3779                 OnLine(source,nickmask,true,'Q',duration,reason);
3780         }
3781
3782         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
3783         {
3784                 OnLine(source,hostmask,true,'E',duration,reason);
3785         }
3786
3787         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
3788         {
3789                 OnLine(source,hostmask,false,'G',0,"");
3790         }
3791
3792         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
3793         {
3794                 OnLine(source,ipmask,false,'Z',0,"");
3795         }
3796
3797         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
3798         {
3799                 OnLine(source,nickmask,false,'Q',0,"");
3800         }
3801
3802         virtual void OnDelELine(userrec* source, const std::string &hostmask)
3803         {
3804                 OnLine(source,hostmask,false,'E',0,"");
3805         }
3806
3807         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
3808         {
3809                 if ((user->fd > -1) && (user->registered == 7))
3810                 {
3811                         if (target_type == TYPE_USER)
3812                         {
3813                                 userrec* u = (userrec*)dest;
3814                                 std::deque<std::string> params;
3815                                 params.push_back(u->nick);
3816                                 params.push_back(text);
3817                                 DoOneToMany(user->nick,"MODE",params);
3818                         }
3819                         else
3820                         {
3821                                 chanrec* c = (chanrec*)dest;
3822                                 std::deque<std::string> params;
3823                                 params.push_back(c->name);
3824                                 params.push_back(text);
3825                                 DoOneToMany(user->nick,"MODE",params);
3826                         }
3827                 }
3828         }
3829
3830         virtual void OnSetAway(userrec* user)
3831         {
3832                 if (IS_LOCAL(user))
3833                 {
3834                         std::deque<std::string> params;
3835                         params.push_back(":"+std::string(user->awaymsg));
3836                         DoOneToMany(user->nick,"AWAY",params);
3837                 }
3838         }
3839
3840         virtual void OnCancelAway(userrec* user)
3841         {
3842                 if (IS_LOCAL(user))
3843                 {
3844                         std::deque<std::string> params;
3845                         params.clear();
3846                         DoOneToMany(user->nick,"AWAY",params);
3847                 }
3848         }
3849
3850         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
3851         {
3852                 TreeSocket* s = (TreeSocket*)opaque;
3853                 if (target)
3854                 {
3855                         if (target_type == TYPE_USER)
3856                         {
3857                                 userrec* u = (userrec*)target;
3858                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+u->nick+" "+modeline);
3859                         }
3860                         else
3861                         {
3862                                 chanrec* c = (chanrec*)target;
3863                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+modeline);
3864                         }
3865                 }
3866         }
3867
3868         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
3869         {
3870                 TreeSocket* s = (TreeSocket*)opaque;
3871                 if (target)
3872                 {
3873                         if (target_type == TYPE_USER)
3874                         {
3875                                 userrec* u = (userrec*)target;
3876                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA "+u->nick+" "+extname+" :"+extdata);
3877                         }
3878                         else if (target_type == TYPE_OTHER)
3879                         {
3880                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA * "+extname+" :"+extdata);
3881                         }
3882                         else if (target_type == TYPE_CHANNEL)
3883                         {
3884                                 chanrec* c = (chanrec*)target;
3885                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA "+c->name+" "+extname+" :"+extdata);
3886                         }
3887                 }
3888         }
3889
3890         virtual void OnEvent(Event* event)
3891         {
3892                 if (event->GetEventID() == "send_metadata")
3893                 {
3894                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
3895                         if (params->size() < 3)
3896                                 return;
3897                         (*params)[2] = ":" + (*params)[2];
3898                         DoOneToMany(Srv->GetServerName(),"METADATA",*params);
3899                 }
3900         }
3901
3902         virtual ~ModuleSpanningTree()
3903         {
3904         }
3905
3906         virtual Version GetVersion()
3907         {
3908                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
3909         }
3910
3911         void Implements(char* List)
3912         {
3913                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
3914                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
3915                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
3916                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
3917                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
3918                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
3919                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = 1;
3920         }
3921
3922         /* It is IMPORTANT that m_spanningtree is the last module in the chain
3923          * so that any activity it sees is FINAL, e.g. we arent going to send out
3924          * a NICK message before m_cloaking has finished putting the +x on the user,
3925          * etc etc.
3926          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
3927          * the module call queue.
3928          */
3929         Priority Prioritize()
3930         {
3931                 return PRIORITY_LAST;
3932         }
3933 };
3934
3935
3936 class ModuleSpanningTreeFactory : public ModuleFactory
3937 {
3938  public:
3939         ModuleSpanningTreeFactory()
3940         {
3941         }
3942
3943         ~ModuleSpanningTreeFactory()
3944         {
3945         }
3946
3947         virtual Module * CreateModule(Server* Me)
3948         {
3949                 TreeProtocolModule = new ModuleSpanningTree(Me);
3950                 return TreeProtocolModule;
3951         }
3952
3953 };
3954
3955
3956 extern "C" void * init_module( void )
3957 {
3958         return new ModuleSpanningTreeFactory;
3959 }