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 #define nspace __gnu_cxx
  45
  46 /*
  47  * The server list in InspIRCd is maintained as two structures
  48  * which hold the data in different ways. Most of the time, we
  49  * want to very quicky obtain three pieces of information:
  50  *
  51  * (1) The information on a server
  52  * (2) The information on the server we must send data through
  53  *     to actually REACH the server we're after
  54  * (3) Potentially, the child/parent objects of this server
  55  *
  56  * The InspIRCd spanning protocol provides easy access to these
  57  * by storing the data firstly in a recursive structure, where
  58  * each item references its parent item, and a dynamic list
  59  * of child items, and another structure which stores the items
  60  * hashed, linearly. This means that if we want to find a server
  61  * by name quickly, we can look it up in the hash, avoiding
  62  * any O(n) lookups. If however, during a split or sync, we want
  63  * to apply an operation to a server, and any of its child objects
  64  * we can resort to recursion to walk the tree structure.
  65  */
  66
  67 class ModuleSpanningTree;
  68 static ModuleSpanningTree* TreeProtocolModule;
  69
  70 extern ServerConfig* Config;
  71 extern InspIRCd* ServerInstance;
  72 extern std::vector<Module*> modules;
  73 extern std::vector<ircd_module*> factory;
  74 extern int MODCOUNT;
  75
  76 /* Any socket can have one of five states at any one time.
  77  * The LISTENER state indicates a socket which is listening
  78  * for connections. It cannot receive data itself, only incoming
  79  * sockets.
  80  * The CONNECTING state indicates an outbound socket which is
  81  * waiting to be writeable.
  82  * The WAIT_AUTH_1 state indicates the socket is outbound and
  83  * has successfully connected, but has not yet sent and received
  84  * SERVER strings.
  85  * The WAIT_AUTH_2 state indicates that the socket is inbound
  86  * (allocated by a LISTENER) but has not yet sent and received
  87  * SERVER strings.
  88  * The CONNECTED state represents a fully authorized, fully
  89  * connected server.
  90  */
  91 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  92
  93 /* We need to import these from the core for use in netbursts */
  94 extern user_hash clientlist;
  95 extern chan_hash chanlist;
  96
  97 /* Foward declarations */
  98 class TreeServer;
  99 class TreeSocket;
 100
 101 /* This variable represents the root of the server tree
 102  * (for all intents and purposes, it's us)
 103  */
 104 TreeServer *TreeRoot;
 105
 106 static Server* Srv;
 107
 108 /* This hash_map holds the hash equivalent of the server
 109  * tree, used for rapid linear lookups.
 110  */
 111 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
 112 server_hash serverlist;
 113
 114 /* More forward declarations */
 115 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 116 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 117 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 118 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 119 void ReadConfiguration(bool rebind);
 120
 121 /* Flatten links and /MAP for non-opers */
 122 bool FlatLinks;
 123 /* Hide U-Lined servers in /MAP and /LINKS */
 124 bool HideULines;
 125
 126 /* Imported from xline.cpp for use during netburst */
 127 extern std::vector<KLine> klines;
 128 extern std::vector<GLine> glines;
 129 extern std::vector<ZLine> zlines;
 130 extern std::vector<QLine> qlines;
 131 extern std::vector<ELine> elines;
 132 extern std::vector<KLine> pklines;
 133 extern std::vector<GLine> pglines;
 134 extern std::vector<ZLine> pzlines;
 135 extern std::vector<QLine> pqlines;
 136 extern std::vector<ELine> pelines;
 137
 138 /* Each server in the tree is represented by one class of
 139  * type TreeServer. A locally connected TreeServer can
 140  * have a class of type TreeSocket associated with it, for
 141  * remote servers, the TreeSocket entry will be NULL.
 142  * Each server also maintains a pointer to its parent
 143  * (NULL if this server is ours, at the top of the tree)
 144  * and a pointer to its "Route" (see the comments in the
 145  * constructors below), and also a dynamic list of pointers
 146  * to its children which can be iterated recursively
 147  * if required. Creating or deleting objects of type
 148  i* TreeServer automatically maintains the hash_map of
 149  * TreeServer items, deleting and inserting them as they
 150  * are created and destroyed.
 151  */
 152
 153 class TreeServer : public classbase
 154 {
 155         TreeServer* Parent;                     /* Parent entry */
 156         TreeServer* Route;                      /* Route entry */
 157         std::vector<TreeServer*> Children;      /* List of child objects */
 158         irc::string ServerName;                 /* Server's name */
 159         std::string ServerDesc;                 /* Server's description */
 160         std::string VersionString;              /* Version string or empty string */
 161         int UserCount;                          /* Not used in this version */
 162         int OperCount;                          /* Not used in this version */
 163         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 164         time_t NextPing;                        /* After this time, the server should be PINGed*/
 165         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 166
 167  public:
 168
 169         /* We don't use this constructor. Its a dummy, and won't cause any insertion
 170          * of the TreeServer into the hash_map. See below for the two we DO use.
 171          */
 172         TreeServer()
 173         {
 174                 Parent = NULL;
 175                 ServerName = "";
 176                 ServerDesc = "";
 177                 VersionString = "";
 178                 UserCount = OperCount = 0;
 179                 VersionString = Srv->GetVersion();
 180         }
 181
 182         /* We use this constructor only to create the 'root' item, TreeRoot, which
 183          * represents our own server. Therefore, it has no route, no parent, and
 184          * no socket associated with it. Its version string is our own local version.
 185          */
 186         TreeServer(std::string Name, std::string Desc) : ServerName(Name.c_str()), ServerDesc(Desc)
 187         {
 188                 Parent = NULL;
 189                 VersionString = "";
 190                 UserCount = OperCount = 0;
 191                 VersionString = Srv->GetVersion();
 192                 Route = NULL;
 193                 Socket = NULL; /* Fix by brain */
 194                 AddHashEntry();
 195         }
 196
 197         /* When we create a new server, we call this constructor to initialize it.
 198          * This constructor initializes the server's Route and Parent, and sets up
 199          * its ping counters so that it will be pinged one minute from now.
 200          */
 201         TreeServer(std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) : Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 202         {
 203                 VersionString = "";
 204                 UserCount = OperCount = 0;
 205                 this->SetNextPingTime(time(NULL) + 120);
 206                 this->SetPingFlag();
 207
 208                 /* find the 'route' for this server (e.g. the one directly connected
 209                  * to the local server, which we can use to reach it)
 210                  *
 211                  * In the following example, consider we have just added a TreeServer
 212                  * class for server G on our network, of which we are server A.
 213                  * To route traffic to G (marked with a *) we must send the data to
 214                  * B (marked with a +) so this algorithm initializes the 'Route'
 215                  * value to point at whichever server traffic must be routed through
 216                  * to get here. If we were to try this algorithm with server B,
 217                  * the Route pointer would point at its own object ('this').
 218                  *
 219                  *              A
 220                  *             / \
 221                  *          + B   C
 222                  *           / \   \
 223                  *          D   E   F
 224                  *         /         \
 225                  *      * G           H
 226                  *
 227                  * We only run this algorithm when a server is created, as
 228                  * the routes remain constant while ever the server exists, and
 229                  * do not need to be re-calculated.
 230                  */
 231
 232                 Route = Above;
 233                 if (Route == TreeRoot)
 234                 {
 235                         Route = this;
 236                 }
 237                 else
 238                 {
 239                         while (this->Route->GetParent() != TreeRoot)
 240                         {
 241                                 this->Route = Route->GetParent();
 242                         }
 243                 }
 244
 245                 /* Because recursive code is slow and takes a lot of resources,
 246                  * we store two representations of the server tree. The first
 247                  * is a recursive structure where each server references its
 248                  * children and its parent, which is used for netbursts and
 249                  * netsplits to dump the whole dataset to the other server,
 250                  * and the second is used for very fast lookups when routing
 251                  * messages and is instead a hash_map, where each item can
 252                  * be referenced by its server name. The AddHashEntry()
 253                  * call below automatically inserts each TreeServer class
 254                  * into the hash_map as it is created. There is a similar
 255                  * maintainance call in the destructor to tidy up deleted
 256                  * servers.
 257                  */
 258
 259                 this->AddHashEntry();
 260         }
 261
 262         int QuitUsers(const std::string &reason)
 263         {
 264                 log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 265                 const char* reason_s = reason.c_str();
 266                 std::vector<userrec*> time_to_die;
 267                 for (user_hash::iterator n = clientlist.begin(); n != clientlist.end(); n++)
 268                 {
 269                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 270                         {
 271                                 time_to_die.push_back(n->second);
 272                         }
 273                 }
 274                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 275                 {
 276                         userrec* a = (userrec*)*n;
 277                         log(DEBUG,"Kill %s fd=%d",a->nick,a->fd);
 278                         if (!IS_LOCAL(a))
 279                                 kill_link(a,reason_s);
 280                 }
 281                 return time_to_die.size();
 282         }
 283
 284         /* This method is used to add the structure to the
 285          * hash_map for linear searches. It is only called
 286          * by the constructors.
 287          */
 288         void AddHashEntry()
 289         {
 290                 server_hash::iterator iter;
 291                 iter = serverlist.find(this->ServerName.c_str());
 292                 if (iter == serverlist.end())
 293                         serverlist[this->ServerName.c_str()] = this;
 294         }
 295
 296         /* This method removes the reference to this object
 297          * from the hash_map which is used for linear searches.
 298          * It is only called by the default destructor.
 299          */
 300         void DelHashEntry()
 301         {
 302                 server_hash::iterator iter;
 303                 iter = serverlist.find(this->ServerName.c_str());
 304                 if (iter != serverlist.end())
 305                         serverlist.erase(iter);
 306         }
 307
 308         /* These accessors etc should be pretty self-
 309          * explanitory.
 310          */
 311
 312         TreeServer* GetRoute()
 313         {
 314                 return Route;
 315         }
 316
 317         std::string GetName()
 318         {
 319                 return ServerName.c_str();
 320         }
 321
 322         std::string GetDesc()
 323         {
 324                 return ServerDesc;
 325         }
 326
 327         std::string GetVersion()
 328         {
 329                 return VersionString;
 330         }
 331
 332         void SetNextPingTime(time_t t)
 333         {
 334                 this->NextPing = t;
 335                 LastPingWasGood = false;
 336         }
 337
 338         time_t NextPingTime()
 339         {
 340                 return NextPing;
 341         }
 342
 343         bool AnsweredLastPing()
 344         {
 345                 return LastPingWasGood;
 346         }
 347
 348         void SetPingFlag()
 349         {
 350                 LastPingWasGood = true;
 351         }
 352
 353         int GetUserCount()
 354         {
 355                 return UserCount;
 356         }
 357
 358         void AddUserCount()
 359         {
 360                 UserCount++;
 361         }
 362
 363         void DelUserCount()
 364         {
 365                 UserCount--;
 366         }
 367
 368         int GetOperCount()
 369         {
 370                 return OperCount;
 371         }
 372
 373         TreeSocket* GetSocket()
 374         {
 375                 return Socket;
 376         }
 377
 378         TreeServer* GetParent()
 379         {
 380                 return Parent;
 381         }
 382
 383         void SetVersion(std::string Version)
 384         {
 385                 VersionString = Version;
 386         }
 387
 388         unsigned int ChildCount()
 389         {
 390                 return Children.size();
 391         }
 392
 393         TreeServer* GetChild(unsigned int n)
 394         {
 395                 if (n < Children.size())
 396                 {
 397                         /* Make sure they  cant request
 398                          * an out-of-range object. After
 399                          * all we know what these programmer
 400                          * types are like *grin*.
 401                          */
 402                         return Children[n];
 403                 }
 404                 else
 405                 {
 406                         return NULL;
 407                 }
 408         }
 409
 410         void AddChild(TreeServer* Child)
 411         {
 412                 Children.push_back(Child);
 413         }
 414
 415         bool DelChild(TreeServer* Child)
 416         {
 417                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 418                 {
 419                         if (*a == Child)
 420                         {
 421                                 Children.erase(a);
 422                                 return true;
 423                         }
 424                 }
 425                 return false;
 426         }
 427
 428         /* Removes child nodes of this node, and of that node, etc etc.
 429          * This is used during netsplits to automatically tidy up the
 430          * server tree. It is slow, we don't use it for much else.
 431          */
 432         bool Tidy()
 433         {
 434                 bool stillchildren = true;
 435                 while (stillchildren)
 436                 {
 437                         stillchildren = false;
 438                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 439                         {
 440                                 TreeServer* s = (TreeServer*)*a;
 441                                 s->Tidy();
 442                                 Children.erase(a);
 443                                 DELETE(s);
 444                                 stillchildren = true;
 445                                 break;
 446                         }
 447                 }
 448                 return true;
 449         }
 450
 451         ~TreeServer()
 452         {
 453                 /* We'd better tidy up after ourselves, eh? */
 454                 this->DelHashEntry();
 455         }
 456 };
 457
 458 /* The Link class might as well be a struct,
 459  * but this is C++ and we don't believe in structs (!).
 460  * It holds the entire information of one <link>
 461  * tag from the main config file. We maintain a list
 462  * of them, and populate the list on rehash/load.
 463  */
 464
 465 class Link : public classbase
 466 {
 467  public:
 468          irc::string Name;
 469          std::string IPAddr;
 470          int Port;
 471          std::string SendPass;
 472          std::string RecvPass;
 473          unsigned long AutoConnect;
 474          time_t NextConnectTime;
 475          std::string EncryptionKey;
 476          bool HiddenFromStats;
 477 };
 478
 479 /* The usual stuff for inspircd modules,
 480  * plus the vector of Link classes which we
 481  * use to store the <link> tags from the config
 482  * file.
 483  */
 484 ConfigReader *Conf;
 485 std::vector<Link> LinkBlocks;
 486
 487 /* Yay for fast searches!
 488  * This is hundreds of times faster than recursion
 489  * or even scanning a linked list, especially when
 490  * there are more than a few servers to deal with.
 491  * (read as: lots).
 492  */
 493 TreeServer* FindServer(std::string ServerName)
 494 {
 495         server_hash::iterator iter;
 496         iter = serverlist.find(ServerName.c_str());
 497         if (iter != serverlist.end())
 498         {
 499                 return iter->second;
 500         }
 501         else
 502         {
 503                 return NULL;
 504         }
 505 }
 506
 507 /* Returns the locally connected server we must route a
 508  * message through to reach server 'ServerName'. This
 509  * only applies to one-to-one and not one-to-many routing.
 510  * See the comments for the constructor of TreeServer
 511  * for more details.
 512  */
 513 TreeServer* BestRouteTo(std::string ServerName)
 514 {
 515         if (ServerName.c_str() == TreeRoot->GetName())
 516                 return NULL;
 517         TreeServer* Found = FindServer(ServerName);
 518         if (Found)
 519         {
 520                 return Found->GetRoute();
 521         }
 522         else
 523         {
 524                 return NULL;
 525         }
 526 }
 527
 528 /* Find the first server matching a given glob mask.
 529  * Theres no find-using-glob method of hash_map [awwww :-(]
 530  * so instead, we iterate over the list using an iterator
 531  * and match each one until we get a hit. Yes its slow,
 532  * deal with it.
 533  */
 534 TreeServer* FindServerMask(std::string ServerName)
 535 {
 536         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 537         {
 538                 if (Srv->MatchText(i->first.c_str(),ServerName))
 539                         return i->second;
 540         }
 541         return NULL;
 542 }
 543
 544 /* A convenient wrapper that returns true if a server exists */
 545 bool IsServer(std::string ServerName)
 546 {
 547         return (FindServer(ServerName) != NULL);
 548 }
 549
 550
 551 class cmd_rconnect : public command_t
 552 {
 553         Module* Creator;
 554  public:
 555         cmd_rconnect (Module* Callback) : command_t("RCONNECT", 'o', 2), Creator(Callback)
 556         {
 557                 this->source = "m_spanningtree.so";
 558         }
 559
 560         void Handle (const char** parameters, int pcnt, userrec *user)
 561         {
 562                 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]);
 563                 /* Is this aimed at our server? */
 564                 if (Srv->MatchText(Srv->GetServerName(),parameters[0]))
 565                 {
 566                         /* Yes, initiate the given connect */
 567                         WriteOpers("*** Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 568                         const char* para[1];
 569                         para[0] = parameters[1];
 570                         Creator->OnPreCommand("CONNECT", para, 1, user, true);
 571                 }
 572         }
 573 };
 574
 575
 576
 577 /* Every SERVER connection inbound or outbound is represented by
 578  * an object of type TreeSocket.
 579  * TreeSockets, being inherited from InspSocket, can be tied into
 580  * the core socket engine, and we cn therefore receive activity events
 581  * for them, just like activex objects on speed. (yes really, that
 582  * is a technical term!) Each of these which relates to a locally
 583  * connected server is assocated with it, by hooking it onto a
 584  * TreeSocket class using its constructor. In this way, we can
 585  * maintain a list of servers, some of which are directly connected,
 586  * some of which are not.
 587  */
 588
 589 class TreeSocket : public InspSocket
 590 {
 591         std::string myhost;
 592         std::string in_buffer;
 593         ServerState LinkState;
 594         std::string InboundServerName;
 595         std::string InboundDescription;
 596         int num_lost_users;
 597         int num_lost_servers;
 598         time_t NextPing;
 599         bool LastPingWasGood;
 600         bool bursting;
 601         AES* ctx_in;
 602         AES* ctx_out;
 603         unsigned int keylength;
 604
 605  public:
 606
 607         /* Because most of the I/O gubbins are encapsulated within
 608          * InspSocket, we just call the superclass constructor for
 609          * most of the action, and append a few of our own values
 610          * to it.
 611          */
 612         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 613                 : InspSocket(host, port, listening, maxtime)
 614         {
 615                 myhost = host;
 616                 this->LinkState = LISTENER;
 617                 this->ctx_in = NULL;
 618                 this->ctx_out = NULL;
 619         }
 620
 621         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 622                 : InspSocket(host, port, listening, maxtime)
 623         {
 624                 myhost = ServerName;
 625                 this->LinkState = CONNECTING;
 626                 this->ctx_in = NULL;
 627                 this->ctx_out = NULL;
 628         }
 629
 630         /* When a listening socket gives us a new file descriptor,
 631          * we must associate it with a socket without creating a new
 632          * connection. This constructor is used for this purpose.
 633          */
 634         TreeSocket(int newfd, char* ip)
 635                 : InspSocket(newfd, ip)
 636         {
 637                 this->LinkState = WAIT_AUTH_1;
 638                 this->ctx_in = NULL;
 639                 this->ctx_out = NULL;
 640                 this->SendCapabilities();
 641         }
 642
 643         ~TreeSocket()
 644         {
 645                 if (ctx_in)
 646                         DELETE(ctx_in);
 647                 if (ctx_out)
 648                         DELETE(ctx_out);
 649         }
 650
 651         void InitAES(std::string key,std::string SName)
 652         {
 653                 if (key == "")
 654                         return;
 655
 656                 ctx_in = new AES();
 657                 ctx_out = new AES();
 658                 log(DEBUG,"Initialized AES key %s",key.c_str());
 659                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 660                 keylength = key.length();
 661                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 662                 {
 663                         WriteOpers("*** \2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 664                         log(DEBUG,"Key length not 16, 24 or 32 characters!");
 665                 }
 666                 else
 667                 {
 668                         WriteOpers("*** \2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 669                         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\
 670                                 \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);
 671                         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\
 672                                 \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);
 673                 }
 674         }
 675
 676         /* When an outbound connection finishes connecting, we receive
 677          * this event, and must send our SERVER string to the other
 678          * side. If the other side is happy, as outlined in the server
 679          * to server docs on the inspircd.org site, the other side
 680          * will then send back its own server string.
 681          */
 682         virtual bool OnConnected()
 683         {
 684                 if (this->LinkState == CONNECTING)
 685                 {
 686                         /* we do not need to change state here. */
 687                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 688                         {
 689                                 if (x->Name == this->myhost)
 690                                 {
 691                                         Srv->SendOpers("*** Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] established.");
 692                                         this->SendCapabilities();
 693                                         if (x->EncryptionKey != "")
 694                                         {
 695                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 696                                                 {
 697                                                         WriteOpers("\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 698                                                 }
 699                                                 else
 700                                                 {
 701                                                         this->WriteLine("AES "+Srv->GetServerName());
 702                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 703                                                 }
 704                                         }
 705                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 706                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 707                                         return true;
 708                                 }
 709                         }
 710                 }
 711                 /* There is a (remote) chance that between the /CONNECT and the connection
 712                  * being accepted, some muppet has removed the <link> block and rehashed.
 713                  * If that happens the connection hangs here until it's closed. Unlikely
 714                  * and rather harmless.
 715                  */
 716                 Srv->SendOpers("*** Connection to \2"+myhost+"\2 lost link tag(!)");
 717                 return true;
 718         }
 719
 720         virtual void OnError(InspSocketError e)
 721         {
 722                 /* We don't handle this method, because all our
 723                  * dirty work is done in OnClose() (see below)
 724                  * which is still called on error conditions too.
 725                  */
 726                 if (e == I_ERR_CONNECT)
 727                 {
 728                         Srv->SendOpers("*** Connection failed: Connection refused");
 729                 }
 730         }
 731
 732         virtual int OnDisconnect()
 733         {
 734                 /* For the same reason as above, we don't
 735                  * handle OnDisconnect()
 736                  */
 737                 return true;
 738         }
 739
 740         /* Recursively send the server tree with distances as hops.
 741          * This is used during network burst to inform the other server
 742          * (and any of ITS servers too) of what servers we know about.
 743          * If at any point any of these servers already exist on the other
 744          * end, our connection may be terminated. The hopcounts given
 745          * by this function are relative, this doesn't matter so long as
 746          * they are all >1, as all the remote servers re-calculate them
 747          * to be relative too, with themselves as hop 0.
 748          */
 749         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 750         {
 751                 char command[1024];
 752                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 753                 {
 754                         TreeServer* recursive_server = Current->GetChild(q);
 755                         if (recursive_server != s)
 756                         {
 757                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 758                                 this->WriteLine(command);
 759                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 760                                 /* down to next level */
 761                                 this->SendServers(recursive_server, s, hops+1);
 762                         }
 763                 }
 764         }
 765
 766         std::string MyCapabilities()
 767         {
 768                 ServerConfig* Config = Srv->GetConfig();
 769                 std::vector<std::string> modlist;
 770                 std::string capabilities = "";
 771
 772                 for (int i = 0; i <= MODCOUNT; i++)
 773                 {
 774                         if ((modules[i]->GetVersion().Flags & VF_STATIC) || (modules[i]->GetVersion().Flags & VF_COMMON))
 775                                 modlist.push_back(Config->module_names[i]);
 776                 }
 777                 sort(modlist.begin(),modlist.end());
 778                 for (unsigned int i = 0; i < modlist.size(); i++)
 779                 {
 780                         if (i)
 781                                 capabilities = capabilities + ",";
 782                         capabilities = capabilities + modlist[i];
 783                 }
 784                 return capabilities;
 785         }
 786
 787         void SendCapabilities()
 788         {
 789                 this->WriteLine("CAPAB "+MyCapabilities());
 790         }
 791
 792         bool Capab(std::deque<std::string> params)
 793         {
 794                 if (params.size() != 1)
 795                 {
 796                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB");
 797                         return false;
 798                 }
 799
 800                 if (params[0] != this->MyCapabilities())
 801                 {
 802                         std::string quitserver = this->myhost;
 803                         if (this->InboundServerName != "")
 804                         {
 805                                 quitserver = this->InboundServerName;
 806                         }
 807
 808                         WriteOpers("*** \2ERROR\2: Server '%s' does not have the same set of modules loaded, cannot link!",quitserver.c_str());
 809                         WriteOpers("*** Our networked module set is: '%s'",this->MyCapabilities().c_str());
 810                         WriteOpers("*** Other server's networked module set is: '%s'",params[0].c_str());
 811                         WriteOpers("*** These lists must match exactly on both servers. Please correct these errors, and try again.");
 812                         this->WriteLine("ERROR :CAPAB mismatch; My capabilities: '"+this->MyCapabilities()+"'");
 813                         return false;
 814                 }
 815
 816                 return true;
 817         }
 818
 819         /* This function forces this server to quit, removing this server
 820          * and any users on it (and servers and users below that, etc etc).
 821          * It's very slow and pretty clunky, but luckily unless your network
 822          * is having a REAL bad hair day, this function shouldnt be called
 823          * too many times a month ;-)
 824          */
 825         void SquitServer(std::string &from, TreeServer* Current)
 826         {
 827                 /* recursively squit the servers attached to 'Current'.
 828                  * We're going backwards so we don't remove users
 829                  * while we still need them ;)
 830                  */
 831                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 832                 {
 833                         TreeServer* recursive_server = Current->GetChild(q);
 834                         this->SquitServer(from,recursive_server);
 835                 }
 836                 /* Now we've whacked the kids, whack self */
 837                 num_lost_servers++;
 838                 num_lost_users += Current->QuitUsers(from);
 839                 /*for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 840                 {
 841                         if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 842                         {
 843                                 Goners->AddItem(u->second,from);
 844                                 num_lost_users++;
 845                         }
 846                 }*/
 847         }
 848
 849         /* This is a wrapper function for SquitServer above, which
 850          * does some validation first and passes on the SQUIT to all
 851          * other remaining servers.
 852          */
 853         void Squit(TreeServer* Current,std::string reason)
 854         {
 855                 if ((Current) && (Current != TreeRoot))
 856                 {
 857                         std::deque<std::string> params;
 858                         params.push_back(Current->GetName());
 859                         params.push_back(":"+reason);
 860                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 861                         if (Current->GetParent() == TreeRoot)
 862                         {
 863                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 864                         }
 865                         else
 866                         {
 867                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 868                         }
 869                         num_lost_servers = 0;
 870                         num_lost_users = 0;
 871                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
 872                         SquitServer(from, Current);
 873                         Current->Tidy();
 874                         Current->GetParent()->DelChild(Current);
 875                         DELETE(Current);
 876                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 877                 }
 878                 else
 879                 {
 880                         log(DEFAULT,"Squit from unknown server");
 881                 }
 882         }
 883
 884         /* FMODE command */
 885         bool ForceMode(std::string source, std::deque<std::string> &params)
 886         {
 887                 if (params.size() < 3)
 888                 {
 889                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
 890                         return false;
 891                 }
 892                 userrec* who = new userrec();
 893                 who->fd = FD_MAGIC_NUMBER;
 894                 const char* modelist[64];
 895                 time_t TS = 0;
 896                 int n = 0;
 897                 memset(&modelist,0,sizeof(modelist));
 898                 for (unsigned int q = 0; q < params.size(); q++, n++)
 899                 {
 900                         if (q == 1)
 901                         {
 902                                 /* The timestamp */
 903                                 TS = atoi(params[q].c_str());
 904                         }
 905                         modelist[n] = params[q].c_str();
 906                 }
 907                 // Insert the TS value of the object, either userrec or chanrec
 908                 userrec* a = Srv->FindNick(params[0]);
 909                 time_t ourTS = 0;
 910                 if (a)
 911                 {
 912                         ourTS = a->age;
 913                 }
 914                 //classbase* a = reinterpret_cast<classbase*>(Srv->FindNick(params[0]));
 915                 else
 916                 {
 917                         chanrec* a = Srv->FindChannel(params[0]);
 918                         if (a)
 919                         {
 920                                 ourTS = a->age;
 921                         }
 922                 }
 923                 /* U-lined servers always win regardless of their TS */
 924                 if ((TS > ourTS) && (!Srv->IsUlined(source)))
 925                 {
 926                         /* Bounce the mode back to its sender.
 927                          * We use our higher TS, so the other end
 928                          * SHOULD accept it, if its clock is right.
 929                          * If its clock is wrong well bully for you :p
 930                          */
 931                         params[1] = ConvToStr(ourTS);
 932                         /* Invert the mode string by changing + to -,
 933                          * and - to + in the first param.
 934                          */
 935                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
 936                         {
 937                                 switch (*x)
 938                                 {
 939                                         case '-':
 940                                                 *x = '+';
 941                                         break;
 942                                         case '+':
 943                                                 *x = '-';
 944                                         break;
 945                                 }
 946                         }
 947                         DoOneToOne(source,"FMODE",params,source);
 948                         log(DEBUG,"Mode bounced, our TS less than theirs");
 949                 }
 950                 else
 951                 {
 952                         if ((Srv->IsUlined(source)) && (TS > ourTS))
 953                         {
 954                                 WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",source.c_str(),params[0].c_str());
 955                         }
 956                         /* Allow the mode */
 957                         Srv->SendMode(modelist,params.size(),who);
 958                         DoOneToAllButSender(source,"FMODE",params,source);
 959                 }
 960                 DELETE(who);
 961                 return true;
 962         }
 963
 964         /* FTOPIC command */
 965         bool ForceTopic(std::string source, std::deque<std::string> &params)
 966         {
 967                 if (params.size() != 4)
 968                         return true;
 969                 time_t ts = atoi(params[1].c_str());
 970                 std::string nsource = source;
 971
 972                 chanrec* c = Srv->FindChannel(params[0]);
 973                 if (c)
 974                 {
 975                         if ((ts >= c->topicset) || (!*c->topic))
 976                         {
 977                                 std::string oldtopic = c->topic;
 978                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
 979                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
 980                                 c->topicset = ts;
 981                                 /* if the topic text is the same as the current topic,
 982                                  * dont bother to send the TOPIC command out, just silently
 983                                  * update the set time and set nick.
 984                                  */
 985                                 if (oldtopic != params[3])
 986                                 {
 987                                         userrec* user = Srv->FindNick(source);
 988                                         if (!user)
 989                                         {
 990                                                 WriteChannelWithServ(source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
 991                                         }
 992                                         else
 993                                         {
 994                                                 WriteChannel(c, user, "TOPIC %s :%s", c->name, c->topic);
 995                                                 nsource = user->server;
 996                                         }
 997                                         /* all done, send it on its way */
 998                                         params[3] = ":" + params[3];
 999                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
1000                                 }
1001                         }
1002
1003                 }
1004
1005                 return true;
1006         }
1007
1008         /* FJOIN, similar to unreal SJOIN */
1009         bool ForceJoin(std::string source, std::deque<std::string> &params)
1010         {
1011                 if (params.size() < 3)
1012                         return true;
1013
1014                 char first[MAXBUF];
1015                 char modestring[MAXBUF];
1016                 char* mode_users[127];
1017                 memset(&mode_users,0,sizeof(mode_users));
1018                 mode_users[0] = first;
1019                 mode_users[1] = modestring;
1020                 strcpy(first,"+");
1021                 unsigned int modectr = 2;
1022
1023                 userrec* who = NULL;
1024                 std::string channel = params[0];
1025                 time_t TS = atoi(params[1].c_str());
1026                 char* key = "";
1027
1028                 chanrec* chan = Srv->FindChannel(channel);
1029                 if (chan)
1030                 {
1031                         key = chan->key;
1032                 }
1033                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1034
1035                 /* default is a high value, which if we dont have this
1036                  * channel will let the other side apply their modes.
1037                  */
1038                 time_t ourTS = time(NULL)+600;
1039                 chanrec* us = Srv->FindChannel(channel);
1040                 if (us)
1041                 {
1042                         ourTS = us->age;
1043                 }
1044
1045                 log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
1046
1047                 /* do this first, so our mode reversals are correctly received by other servers
1048                  * if there is a TS collision.
1049                  */
1050                 DoOneToAllButSender(source,"FJOIN",params,source);
1051
1052                 for (unsigned int usernum = 2; usernum < params.size(); usernum++)
1053                 {
1054                         /* process one channel at a time, applying modes. */
1055                         char* usr = (char*)params[usernum].c_str();
1056                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1057                          * (is this even possible?) */
1058                         if (usr && *usr)
1059                         {
1060                                 char permissions = *usr;
1061                                 switch (permissions)
1062                                 {
1063                                         case '@':
1064                                                 usr++;
1065                                                 mode_users[modectr++] = usr;
1066                                                 strlcat(modestring,"o",MAXBUF);
1067                                         break;
1068                                         case '%':
1069                                                 usr++;
1070                                                 mode_users[modectr++] = usr;
1071                                                 strlcat(modestring,"h",MAXBUF);
1072                                         break;
1073                                         case '+':
1074                                                 usr++;
1075                                                 mode_users[modectr++] = usr;
1076                                                 strlcat(modestring,"v",MAXBUF);
1077                                         break;
1078                                 }
1079                                 who = Srv->FindNick(usr);
1080                                 if (who)
1081                                 {
1082                                         Srv->JoinUserToChannel(who,channel,key);
1083                                         if (modectr >= (MAXMODES-1))
1084                                         {
1085                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1086                                                  * if there are more than MAXMODES to go.
1087                                                  */
1088                                                 if ((ourTS >= TS) || (Srv->IsUlined(who->server)))
1089                                                 {
1090                                                         /* We also always let u-lined clients win, no matter what the TS value */
1091                                                         log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1092                                                         Srv->SendMode((const char**)mode_users,modectr,who);
1093                                                         if (ourTS != TS)
1094                                                         {
1095                                                                 log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us,ourTS,TS);
1096                                                                 us->age = TS;
1097                                                         }
1098                                                 }
1099                                                 else
1100                                                 {
1101                                                         log(DEBUG,"Their channel newer than ours, bouncing their modes");
1102                                                         /* bouncy bouncy! */
1103                                                         std::deque<std::string> params;
1104                                                         /* modes are now being UNSET... */
1105                                                         *mode_users[1] = '-';
1106                                                         for (unsigned int x = 0; x < modectr; x++)
1107                                                         {
1108                                                                 if (x == 1)
1109                                                                 {
1110                                                                         params.push_back(ConvToStr(us->age));
1111                                                                 }
1112                                                                 params.push_back(mode_users[x]);
1113                                                         }
1114                                                         // tell everyone to bounce the modes. bad modes, bad!
1115                                                         DoOneToMany(Srv->GetServerName(),"FMODE",params);
1116                                                 }
1117                                                 strcpy(mode_users[1],"+");
1118                                                 modectr = 2;
1119                                         }
1120                                 }
1121                         }
1122                 }
1123                 /* there werent enough modes built up to flush it during FJOIN,
1124                  * or, there are a number left over. flush them out.
1125                  */
1126                 if ((modectr > 2) && (who))
1127                 {
1128                         if (ourTS >= TS)
1129                         {
1130                                 log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1131                                 Srv->SendMode((const char**)mode_users,modectr,who);
1132                                 if (ourTS != TS)
1133                                 {
1134                                         log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us,ourTS,TS);
1135                                         us->age = TS;
1136                                 }
1137                         }
1138                         else
1139                         {
1140                                 log(DEBUG,"Their channel newer than ours, bouncing their modes");
1141                                 std::deque<std::string> params;
1142                                 *mode_users[1] = '-';
1143                                 for (unsigned int x = 0; x < modectr; x++)
1144                                 {
1145                                         if (x == 1)
1146                                         {
1147                                                 params.push_back(ConvToStr(us->age));
1148                                         }
1149                                         params.push_back(mode_users[x]);
1150                                 }
1151                                 DoOneToMany(Srv->GetServerName(),"FMODE",params);
1152                         }
1153                 }
1154                 return true;
1155         }
1156
1157         bool SyncChannelTS(std::string source, std::deque<std::string> &params)
1158         {
1159                 if (params.size() >= 2)
1160                 {
1161                         chanrec* c = Srv->FindChannel(params[0]);
1162                         if (c)
1163                         {
1164                                 time_t theirTS = atoi(params[1].c_str());
1165                                 time_t ourTS = c->age;
1166                                 if (ourTS >= theirTS)
1167                                 {
1168                                         log(DEBUG,"Updating timestamp for %s, our timestamp was %lu and theirs is %lu",c->name,ourTS,theirTS);
1169                                         c->age = theirTS;
1170                                 }
1171                         }
1172                 }
1173                 DoOneToAllButSender(Srv->GetServerName(),"SYNCTS",params,source);
1174                 return true;
1175         }
1176
1177         /* NICK command */
1178         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1179         {
1180                 if (params.size() < 8)
1181                         return true;
1182                 if (params.size() > 8)
1183                 {
1184                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1185                         return true;
1186                 }
1187                 // NICK age nick host dhost ident +modes ip :gecos
1188                 //   0   123  4 56   7
1189                 time_t age = atoi(params[0].c_str());
1190
1191                 /* This used to have a pretty craq'y loop doing the same thing,
1192                  * now we just let the STL do the hard work (more efficiently)
1193                  */
1194                 params[5] = params[5].substr(params[5].find_first_not_of('+'));
1195
1196                 const char* tempnick = params[1].c_str();
1197                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1198
1199                 user_hash::iterator iter = clientlist.find(tempnick);
1200
1201                 if (iter != clientlist.end())
1202                 {
1203                         // nick collision
1204                         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);
1205                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Nickname collision");
1206                         return true;
1207                 }
1208
1209                 clientlist[tempnick] = new userrec();
1210                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
1211                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX-1);
1212                 strlcpy(clientlist[tempnick]->host, params[2].c_str(),63);
1213                 strlcpy(clientlist[tempnick]->dhost, params[3].c_str(),63);
1214                 clientlist[tempnick]->server = FindServerNamePtr(source.c_str());
1215                 strlcpy(clientlist[tempnick]->ident, params[4].c_str(),IDENTMAX);
1216                 strlcpy(clientlist[tempnick]->fullname, params[7].c_str(),MAXGECOS);
1217                 clientlist[tempnick]->registered = 7;
1218                 clientlist[tempnick]->signon = age;
1219
1220                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1221                 {
1222                         clientlist[tempnick]->modes[(*v)-65] = 1;
1223                 }
1224                 inet_aton(params[6].c_str(),&clientlist[tempnick]->ip4);
1225
1226                 WriteOpers("*** Client connecting at %s: %s!%s@%s [%s]",clientlist[tempnick]->server,clientlist[tempnick]->nick,clientlist[tempnick]->ident,clientlist[tempnick]->host, inet_ntoa(clientlist[tempnick]->ip4));
1227
1228                 params[7] = ":" + params[7];
1229                 DoOneToAllButSender(source,"NICK",params,source);
1230
1231                 // Increment the Source Servers User Count..
1232                 TreeServer* SourceServer = FindServer(source);
1233                 if (SourceServer)
1234                 {
1235                         log(DEBUG,"Found source server of %s",clientlist[tempnick]->nick);
1236                         SourceServer->AddUserCount();
1237                 }
1238
1239                 return true;
1240         }
1241
1242         /* Send one or more FJOINs for a channel of users.
1243          * If the length of a single line is more than 480-NICKMAX
1244          * in length, it is split over multiple lines.
1245          */
1246         void SendFJoins(TreeServer* Current, chanrec* c)
1247         {
1248                 log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1249                 char list[MAXBUF];
1250                 std::string individual_halfops = ":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age);
1251
1252                 size_t dlen, curlen;
1253                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
1254                 int numusers = 0;
1255                 char* ptr = list + dlen;
1256
1257                 CUList *ulist = c->GetUsers();
1258                 std::vector<userrec*> specific_halfop;
1259                 std::vector<userrec*> specific_voice;
1260                 std::string modes = "";
1261                 std::string params = "";
1262
1263                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1264                 {
1265                         int x = cflags(i->second,c);
1266                         if ((x & UCMODE_HOP) && (x & UCMODE_OP))
1267                         {
1268                                 specific_halfop.push_back(i->second);
1269                         }
1270                         if (((x & UCMODE_HOP) || (x & UCMODE_OP)) && (x & UCMODE_VOICE))
1271                         {
1272                                 specific_voice.push_back(i->second);
1273                         }
1274
1275                         const char* n = "";
1276                         if (x & UCMODE_OP)
1277                         {
1278                                 n = "@";
1279                         }
1280                         else if (x & UCMODE_HOP)
1281                         {
1282                                 n = "%";
1283                         }
1284                         else if (x & UCMODE_VOICE)
1285                         {
1286                                 n = "+";
1287                         }
1288
1289                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s", n, i->second->nick);
1290
1291                         curlen += ptrlen;
1292                         ptr += ptrlen;
1293
1294                         numusers++;
1295
1296                         if (curlen > (480-NICKMAX))
1297                         {
1298                                 this->WriteLine(list);
1299                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
1300                                 ptr = list + dlen;
1301                                 ptrlen = 0;
1302                                 numusers = 0;
1303                                 for (unsigned int y = 0; y < specific_voice.size(); y++)
1304                                 {
1305                                         modes.append("v");
1306                                         params.append(specific_voice[y]->nick).append(" ");
1307                                         //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +v "+specific_voice[y]->nick);
1308                                 }
1309                                 for (unsigned int y = 0; y < specific_halfop.size(); y++)
1310                                 {
1311                                         modes.append("h");
1312                                         params.append(specific_halfop[y]->nick).append(" ");
1313                                         //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +h "+specific_halfop[y]->nick);
1314                                 }
1315                         }
1316                 }
1317                 if (numusers)
1318                 {
1319                         this->WriteLine(list);
1320                         for (unsigned int y = 0; y < specific_voice.size(); y++)
1321                         {
1322                                 modes.append("v");
1323                                 params.append(specific_voice[y]->nick).append(" ");
1324                                 //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +v "+specific_voice[y]->nick);
1325                         }
1326                         for (unsigned int y = 0; y < specific_halfop.size(); y++)
1327                         {
1328                                 modes.append("h");
1329                                 params.append(specific_halfop[y]->nick).append(" ");
1330                                 //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +h "+specific_halfop[y]->nick);
1331                         }
1332                 }
1333                 //std::string modes = "";
1334                 //std::string params = "";
1335                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1336                 {
1337                         modes.append("b");
1338                         params.append(b->data).append(" ");
1339                 }
1340                 /* XXX: Send each channel mode and its params -- we'll need a method for this in ModeHandler? */
1341                 //FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1342                 this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+chanmodes(c,true)+modes+" "+params);
1343         }
1344
1345         /* Send G, Q, Z and E lines */
1346         void SendXLines(TreeServer* Current)
1347         {
1348                 char data[MAXBUF];
1349                 std::string n = Srv->GetServerName();
1350                 const char* sn = n.c_str();
1351                 int iterations = 0;
1352                 /* Yes, these arent too nice looking, but they get the job done */
1353                 for (std::vector<ZLine>::iterator i = zlines.begin(); i != zlines.end(); i++, iterations++)
1354                 {
1355                         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);
1356                         this->WriteLine(data);
1357                 }
1358                 for (std::vector<QLine>::iterator i = qlines.begin(); i != qlines.end(); i++, iterations++)
1359                 {
1360                         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);
1361                         this->WriteLine(data);
1362                 }
1363                 for (std::vector<GLine>::iterator i = glines.begin(); i != glines.end(); i++, iterations++)
1364                 {
1365                         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);
1366                         this->WriteLine(data);
1367                 }
1368                 for (std::vector<ELine>::iterator i = elines.begin(); i != elines.end(); i++, iterations++)
1369                 {
1370                         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);
1371                         this->WriteLine(data);
1372                 }
1373                 for (std::vector<ZLine>::iterator i = pzlines.begin(); i != pzlines.end(); i++, iterations++)
1374                 {
1375                         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);
1376                         this->WriteLine(data);
1377                 }
1378                 for (std::vector<QLine>::iterator i = pqlines.begin(); i != pqlines.end(); i++, iterations++)
1379                 {
1380                         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);
1381                         this->WriteLine(data);
1382                 }
1383                 for (std::vector<GLine>::iterator i = pglines.begin(); i != pglines.end(); i++, iterations++)
1384                 {
1385                         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);
1386                         this->WriteLine(data);
1387                 }
1388                 for (std::vector<ELine>::iterator i = pelines.begin(); i != pelines.end(); i++, iterations++)
1389                 {
1390                         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);
1391                         this->WriteLine(data);
1392                 }
1393         }
1394
1395         /* Send channel modes and topics */
1396         void SendChannelModes(TreeServer* Current)
1397         {
1398                 char data[MAXBUF];
1399                 std::deque<std::string> list;
1400                 int iterations = 0;
1401                 std::string n = Srv->GetServerName();
1402                 const char* sn = n.c_str();
1403                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++, iterations++)
1404                 {
1405                         SendFJoins(Current, c->second);
1406                         if (*c->second->topic)
1407                         {
1408                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1409                                 this->WriteLine(data);
1410                         }
1411                         FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1412                         list.clear();
1413                         c->second->GetExtList(list);
1414                         for (unsigned int j = 0; j < list.size(); j++)
1415                         {
1416                                 FOREACH_MOD(I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1417                         }
1418                 }
1419         }
1420
1421         /* send all users and their oper state/modes */
1422         void SendUsers(TreeServer* Current)
1423         {
1424                 char data[MAXBUF];
1425                 std::deque<std::string> list;
1426                 int iterations = 0;
1427                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++, iterations++)
1428                 {
1429                         if (u->second->registered == 7)
1430                         {
1431                                 snprintf(data,MAXBUF,":%s NICK %lu %s %s %s %s +%s %s :%s",u->second->server,(unsigned long)u->second->age,u->second->nick,u->second->host,u->second->dhost,u->second->ident,u->second->FormatModes(),inet_ntoa(u->second->ip4),u->second->fullname);
1432                                 this->WriteLine(data);
1433                                 if (*u->second->oper)
1434                                 {
1435                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1436                                 }
1437                                 if (*u->second->awaymsg)
1438                                 {
1439                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1440                                 }
1441                                 FOREACH_MOD(I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1442                                 list.clear();
1443                                 u->second->GetExtList(list);
1444                                 for (unsigned int j = 0; j < list.size(); j++)
1445                                 {
1446                                         FOREACH_MOD(I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1447                                 }
1448                         }
1449                 }
1450         }
1451
1452         /* This function is called when we want to send a netburst to a local
1453          * server. There is a set order we must do this, because for example
1454          * users require their servers to exist, and channels require their
1455          * users to exist. You get the idea.
1456          */
1457         void DoBurst(TreeServer* s)
1458         {
1459                 /* The calls here to ServerInstance-> yield the processing
1460                  * back to the core so that a large burst is split into at least 6 sections
1461                  * (possibly more)
1462                  */
1463                 std::string burst = "BURST "+ConvToStr(time(NULL));
1464                 std::string endburst = "ENDBURST";
1465                 // Because by the end of the netburst, it  could be gone!
1466                 std::string name = s->GetName();
1467                 Srv->SendOpers("*** Bursting to \2"+name+"\2.");
1468                 this->WriteLine(burst);
1469                 /* send our version string */
1470                 this->WriteLine(":"+Srv->GetServerName()+" VERSION :"+Srv->GetVersion());
1471                 /* Send server tree */
1472                 this->SendServers(TreeRoot,s,1);
1473                 /* Send users and their oper status */
1474                 this->SendUsers(s);
1475                 /* Send everything else (channel modes, xlines etc) */
1476                 this->SendChannelModes(s);
1477                 this->SendXLines(s);
1478                 FOREACH_MOD(I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1479                 this->WriteLine(endburst);
1480                 Srv->SendOpers("*** Finished bursting to \2"+name+"\2.");
1481         }
1482
1483         /* This function is called when we receive data from a remote
1484          * server. We buffer the data in a std::string (it doesnt stay
1485          * there for long), reading using InspSocket::Read() which can
1486          * read up to 16 kilobytes in one operation.
1487          *
1488          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1489          * THE SOCKET OBJECT FOR US.
1490          */
1491         virtual bool OnDataReady()
1492         {
1493                 char* data = this->Read();
1494                 /* Check that the data read is a valid pointer and it has some content */
1495                 if (data && *data)
1496                 {
1497                         this->in_buffer.append(data);
1498                         /* While there is at least one new line in the buffer,
1499                          * do something useful (we hope!) with it.
1500                          */
1501                         while (in_buffer.find("\n") != std::string::npos)
1502                         {
1503                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1504                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1505                                 if (ret.find("\r") != std::string::npos)
1506                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1507                                 /* Process this one, abort if it
1508                                  * didnt return true.
1509                                  */
1510                                 if (this->ctx_in)
1511                                 {
1512                                         char out[1024];
1513                                         char result[1024];
1514                                         memset(result,0,1024);
1515                                         memset(out,0,1024);
1516                                         log(DEBUG,"Original string '%s'",ret.c_str());
1517                                         /* ERROR + CAPAB is still allowed unencryped */
1518                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1519                                         {
1520                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1521                                                 if ((nbytes > 0) && (nbytes < 1024))
1522                                                 {
1523                                                         log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1524                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1525                                                         for (int t = 0; t < nbytes; t++)
1526                                                                 if (result[t] == '\7') result[t] = 0;
1527                                                         ret = result;
1528                                                 }
1529                                         }
1530                                 }
1531                                 if (!this->ProcessLine(ret))
1532                                 {
1533                                         log(DEBUG,"ProcessLine says no!");
1534                                         return false;
1535                                 }
1536                         }
1537                         return true;
1538                 }
1539                 /* EAGAIN returns an empty but non-NULL string, so this
1540                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1541                  */
1542                 return (data && !*data);
1543         }
1544
1545         int WriteLine(std::string line)
1546         {
1547                 log(DEBUG,"OUT: %s",line.c_str());
1548                 if (this->ctx_out)
1549                 {
1550                         char result[10240];
1551                         char result64[10240];
1552                         if (this->keylength)
1553                         {
1554                                 // pad it to the key length
1555                                 int n = this->keylength - (line.length() % this->keylength);
1556                                 if (n)
1557                                 {
1558                                         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);
1559                                         line.append(n,'\7');
1560                                 }
1561                         }
1562                         unsigned int ll = line.length();
1563                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
1564                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
1565                         line = result64;
1566                         //int from64tobits(char *out, const char *in, int maxlen);
1567                 }
1568                 return this->Write(line + "\r\n");
1569         }
1570
1571         /* Handle ERROR command */
1572         bool Error(std::deque<std::string> &params)
1573         {
1574                 if (params.size() < 1)
1575                         return false;
1576                 WriteOpers("*** ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
1577                 /* we will return false to cause the socket to close. */
1578                 return false;
1579         }
1580
1581         /* Because the core won't let users or even SERVERS set +o,
1582          * we use the OPERTYPE command to do this.
1583          */
1584         bool OperType(std::string prefix, std::deque<std::string> &params)
1585         {
1586                 if (params.size() != 1)
1587                 {
1588                         log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
1589                         return true;
1590                 }
1591                 std::string opertype = params[0];
1592                 userrec* u = Srv->FindNick(prefix);
1593                 if (u)
1594                 {
1595                         u->modes[UM_OPERATOR] = 1;
1596                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
1597                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
1598                 }
1599                 return true;
1600         }
1601
1602         /* Because Andy insists that services-compatible servers must
1603          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
1604          */
1605         bool ForceNick(std::string prefix, std::deque<std::string> &params)
1606         {
1607                 if (params.size() < 3)
1608                         return true;
1609
1610                 userrec* u = Srv->FindNick(params[0]);
1611
1612                 if (u)
1613                 {
1614                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
1615                         if (IS_LOCAL(u))
1616                         {
1617                                 std::deque<std::string> par;
1618                                 par.push_back(params[1]);
1619                                 /* This is not required as one is sent in OnUserPostNick below
1620                                  */
1621                                 //DoOneToMany(u->nick,"NICK",par);
1622                                 Srv->ChangeUserNick(u,params[1]);
1623                                 u->age = atoi(params[2].c_str());
1624                         }
1625                 }
1626                 return true;
1627         }
1628
1629         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
1630         {
1631                 if (params.size() < 2)
1632                         return true;
1633
1634                 userrec* u = Srv->FindNick(params[0]);
1635
1636                 if (u)
1637                 {
1638                         Srv->JoinUserToChannel(u,params[1],"");
1639                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
1640                 }
1641                 return true;
1642         }
1643
1644         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
1645         {
1646                 if (params.size() < 1)
1647                         return false;
1648
1649                 std::string servermask = params[0];
1650
1651                 if (Srv->MatchText(Srv->GetServerName(),servermask))
1652                 {
1653                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
1654                         Srv->RehashServer();
1655                         ReadConfiguration(false);
1656                 }
1657                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
1658                 return true;
1659         }
1660
1661         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
1662         {
1663                 if (params.size() != 2)
1664                         return true;
1665
1666                 std::string nick = params[0];
1667                 userrec* u = Srv->FindNick(prefix);
1668                 userrec* who = Srv->FindNick(nick);
1669
1670                 if (who)
1671                 {
1672                         /* Prepend kill source, if we don't have one */
1673                         std::string sourceserv = prefix;
1674                         if (u)
1675                         {
1676                                 sourceserv = u->server;
1677                         }
1678                         if (*(params[1].c_str()) != '[')
1679                         {
1680                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
1681                         }
1682                         std::string reason = params[1];
1683                         params[1] = ":" + params[1];
1684                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
1685                         ::Write(who->fd, ":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
1686                         Srv->QuitUser(who,reason);
1687                 }
1688                 return true;
1689         }
1690
1691         bool LocalPong(std::string prefix, std::deque<std::string> &params)
1692         {
1693                 if (params.size() < 1)
1694                         return true;
1695
1696                 if (params.size() == 1)
1697                 {
1698                         TreeServer* ServerSource = FindServer(prefix);
1699                         if (ServerSource)
1700                         {
1701                                 ServerSource->SetPingFlag();
1702                         }
1703                 }
1704                 else
1705                 {
1706                         std::string forwardto = params[1];
1707                         if (forwardto == Srv->GetServerName())
1708                         {
1709                                 /*
1710                                  * this is a PONG for us
1711                                  * if the prefix is a user, check theyre local, and if they are,
1712                                  * dump the PONG reply back to their fd. If its a server, do nowt.
1713                                  * Services might want to send these s->s, but we dont need to yet.
1714                                  */
1715                                 userrec* u = Srv->FindNick(prefix);
1716
1717                                 if (u)
1718                                 {
1719                                         WriteServ(u->fd,"PONG %s %s",params[0].c_str(),params[1].c_str());
1720                                 }
1721                         }
1722                         else
1723                         {
1724                                 // not for us, pass it on :)
1725                                 DoOneToOne(prefix,"PONG",params,forwardto);
1726                         }
1727                 }
1728
1729                 return true;
1730         }
1731
1732         bool MetaData(std::string prefix, std::deque<std::string> &params)
1733         {
1734                 if (params.size() < 3)
1735                         return true;
1736
1737                 TreeServer* ServerSource = FindServer(prefix);
1738
1739                 if (ServerSource)
1740                 {
1741                         if (params[0] == "*")
1742                         {
1743                                 FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
1744                         }
1745                         else if (*(params[0].c_str()) == '#')
1746                         {
1747                                 chanrec* c = Srv->FindChannel(params[0]);
1748                                 if (c)
1749                                 {
1750                                         FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
1751                                 }
1752                         }
1753                         else if (*(params[0].c_str()) != '#')
1754                         {
1755                                 userrec* u = Srv->FindNick(params[0]);
1756                                 if (u)
1757                                 {
1758                                         FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
1759                                 }
1760                         }
1761                 }
1762
1763                 params[2] = ":" + params[2];
1764                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
1765                 return true;
1766         }
1767
1768         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
1769         {
1770                 if (params.size() < 1)
1771                         return true;
1772
1773                 TreeServer* ServerSource = FindServer(prefix);
1774
1775                 if (ServerSource)
1776                 {
1777                         ServerSource->SetVersion(params[0]);
1778                 }
1779                 params[0] = ":" + params[0];
1780                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
1781                 return true;
1782         }
1783
1784         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
1785         {
1786                 if (params.size() < 1)
1787                         return true;
1788
1789                 userrec* u = Srv->FindNick(prefix);
1790
1791                 if (u)
1792                 {
1793                         Srv->ChangeHost(u,params[0]);
1794                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
1795                 }
1796                 return true;
1797         }
1798
1799         bool AddLine(std::string prefix, std::deque<std::string> &params)
1800         {
1801                 if (params.size() < 6)
1802                         return true;
1803
1804                 bool propogate = false;
1805
1806                 switch (*(params[0].c_str()))
1807                 {
1808                         case 'Z':
1809                                 propogate = add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1810                                 zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
1811                         break;
1812                         case 'Q':
1813                                 propogate = add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1814                                 qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
1815                         break;
1816                         case 'E':
1817                                 propogate = add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1818                                 eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
1819                         break;
1820                         case 'G':
1821                                 propogate = add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1822                                 gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
1823                         break;
1824                         case 'K':
1825                                 propogate = add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1826                         break;
1827                         default:
1828                                 /* Just in case... */
1829                                 Srv->SendOpers("*** \2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
1830                                 propogate = false;
1831                         break;
1832                 }
1833
1834                 /* Send it on its way */
1835                 if (propogate)
1836                 {
1837                         if (atoi(params[4].c_str()))
1838                         {
1839                                 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());
1840                         }
1841                         else
1842                         {
1843                                 WriteOpers("*** %s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
1844                         }
1845                         params[5] = ":" + params[5];
1846                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
1847                 }
1848                 if (!this->bursting)
1849                 {
1850                         log(DEBUG,"Applying lines...");
1851                         apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
1852                 }
1853                 return true;
1854         }
1855
1856         bool ChangeName(std::string prefix, std::deque<std::string> &params)
1857         {
1858                 if (params.size() < 1)
1859                         return true;
1860
1861                 userrec* u = Srv->FindNick(prefix);
1862
1863                 if (u)
1864                 {
1865                         Srv->ChangeGECOS(u,params[0]);
1866                         params[0] = ":" + params[0];
1867                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
1868                 }
1869                 return true;
1870         }
1871
1872         bool Whois(std::string prefix, std::deque<std::string> &params)
1873         {
1874                 if (params.size() < 1)
1875                         return true;
1876
1877                 log(DEBUG,"In IDLE command");
1878                 userrec* u = Srv->FindNick(prefix);
1879
1880                 if (u)
1881                 {
1882                         log(DEBUG,"USER EXISTS: %s",u->nick);
1883                         // an incoming request
1884                         if (params.size() == 1)
1885                         {
1886                                 userrec* x = Srv->FindNick(params[0]);
1887                                 if ((x) && (x->fd > -1))
1888                                 {
1889                                         userrec* x = Srv->FindNick(params[0]);
1890                                         log(DEBUG,"Got IDLE");
1891                                         char signon[MAXBUF];
1892                                         char idle[MAXBUF];
1893                                         log(DEBUG,"Sending back IDLE 3");
1894                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
1895                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
1896                                         std::deque<std::string> par;
1897                                         par.push_back(prefix);
1898                                         par.push_back(signon);
1899                                         par.push_back(idle);
1900                                         // ours, we're done, pass it BACK
1901                                         DoOneToOne(params[0],"IDLE",par,u->server);
1902                                 }
1903                                 else
1904                                 {
1905                                         // not ours pass it on
1906                                         DoOneToOne(prefix,"IDLE",params,x->server);
1907                                 }
1908                         }
1909                         else if (params.size() == 3)
1910                         {
1911                                 std::string who_did_the_whois = params[0];
1912                                 userrec* who_to_send_to = Srv->FindNick(who_did_the_whois);
1913                                 if ((who_to_send_to) && (who_to_send_to->fd > -1))
1914                                 {
1915                                         log(DEBUG,"Got final IDLE");
1916                                         // an incoming reply to a whois we sent out
1917                                         std::string nick_whoised = prefix;
1918                                         unsigned long signon = atoi(params[1].c_str());
1919                                         unsigned long idle = atoi(params[2].c_str());
1920                                         if ((who_to_send_to) && (who_to_send_to->fd > -1))
1921                                                 do_whois(who_to_send_to,u,signon,idle,nick_whoised.c_str());
1922                                 }
1923                                 else
1924                                 {
1925                                         // not ours, pass it on
1926                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
1927                                 }
1928                         }
1929                 }
1930                 return true;
1931         }
1932
1933         bool Push(std::string prefix, std::deque<std::string> &params)
1934         {
1935                 if (params.size() < 2)
1936                         return true;
1937
1938                 userrec* u = Srv->FindNick(params[0]);
1939
1940                 if (!u)
1941                         return true;
1942
1943                 if (IS_LOCAL(u))
1944                 {
1945                         // push the raw to the user
1946                         if (Srv->IsUlined(prefix))
1947                         {
1948                                 ::Write(u->fd,"%s",params[1].c_str());
1949                         }
1950                         else
1951                         {
1952                                 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());
1953                         }
1954                 }
1955                 else
1956                 {
1957                         // continue the raw onwards
1958                         params[1] = ":" + params[1];
1959                         DoOneToOne(prefix,"PUSH",params,u->server);
1960                 }
1961                 return true;
1962         }
1963
1964         bool Time(std::string prefix, std::deque<std::string> &params)
1965         {
1966                 // :source.server TIME remote.server sendernick
1967                 // :remote.server TIME source.server sendernick TS
1968                 if (params.size() == 2)
1969                 {
1970                         // someone querying our time?
1971                         if (Srv->GetServerName() == params[0])
1972                         {
1973                                 userrec* u = Srv->FindNick(params[1]);
1974                                 if (u)
1975                                 {
1976                                         char curtime[256];
1977                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
1978                                         params.push_back(curtime);
1979                                         params[0] = prefix;
1980                                         DoOneToOne(Srv->GetServerName(),"TIME",params,params[0]);
1981                                 }
1982                         }
1983                         else
1984                         {
1985                                 // not us, pass it on
1986                                 userrec* u = Srv->FindNick(params[1]);
1987                                 if (u)
1988                                         DoOneToOne(prefix,"TIME",params,params[0]);
1989                         }
1990                 }
1991                 else if (params.size() == 3)
1992                 {
1993                         // a response to a previous TIME
1994                         userrec* u = Srv->FindNick(params[1]);
1995                         if ((u) && (IS_LOCAL(u)))
1996                         {
1997                         time_t rawtime = atol(params[2].c_str());
1998                         struct tm * timeinfo;
1999                         timeinfo = localtime(&rawtime);
2000                                 char tms[26];
2001                                 snprintf(tms,26,"%s",asctime(timeinfo));
2002                                 tms[24] = 0;
2003                         WriteServ(u->fd,"391 %s %s :%s",u->nick,prefix.c_str(),tms);
2004                         }
2005                         else
2006                         {
2007                                 if (u)
2008                                         DoOneToOne(prefix,"TIME",params,u->server);
2009                         }
2010                 }
2011                 return true;
2012         }
2013
2014         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2015         {
2016                 if (params.size() < 1)
2017                         return true;
2018
2019                 if (params.size() == 1)
2020                 {
2021                         std::string stufftobounce = params[0];
2022                         this->WriteLine(":"+Srv->GetServerName()+" PONG "+stufftobounce);
2023                         return true;
2024                 }
2025                 else
2026                 {
2027                         std::string forwardto = params[1];
2028                         if (forwardto == Srv->GetServerName())
2029                         {
2030                                 // this is a ping for us, send back PONG to the requesting server
2031                                 params[1] = params[0];
2032                                 params[0] = forwardto;
2033                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2034                         }
2035                         else
2036                         {
2037                                 // not for us, pass it on :)
2038                                 DoOneToOne(prefix,"PING",params,forwardto);
2039                         }
2040                         return true;
2041                 }
2042         }
2043
2044         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2045         {
2046                 if (params.size() < 4)
2047                         return false;
2048
2049                 std::string servername = params[0];
2050                 std::string password = params[1];
2051                 // hopcount is not used for a remote server, we calculate this ourselves
2052                 std::string description = params[3];
2053                 TreeServer* ParentOfThis = FindServer(prefix);
2054
2055                 if (!ParentOfThis)
2056                 {
2057                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2058                         return false;
2059                 }
2060                 TreeServer* CheckDupe = FindServer(servername);
2061                 if (CheckDupe)
2062                 {
2063                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2064                         Srv->SendOpers("*** Server connection from \2"+servername+"\2 denied, already exists");
2065                         return false;
2066                 }
2067                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
2068                 ParentOfThis->AddChild(Node);
2069                 params[3] = ":" + params[3];
2070                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2071                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2072                 return true;
2073         }
2074
2075         bool Outbound_Reply_Server(std::deque<std::string> &params)
2076         {
2077                 if (params.size() < 4)
2078                         return false;
2079
2080                 irc::string servername = params[0].c_str();
2081                 std::string sname = params[0];
2082                 std::string password = params[1];
2083                 int hops = atoi(params[2].c_str());
2084
2085                 if (hops)
2086                 {
2087                         this->WriteLine("ERROR :Server too far away for authentication");
2088                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2089                         return false;
2090                 }
2091                 std::string description = params[3];
2092                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2093                 {
2094                         if ((x->Name == servername) && (x->RecvPass == password))
2095                         {
2096                                 TreeServer* CheckDupe = FindServer(sname);
2097                                 if (CheckDupe)
2098                                 {
2099                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2100                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2101                                         return false;
2102                                 }
2103                                 // Begin the sync here. this kickstarts the
2104                                 // other side, waiting in WAIT_AUTH_2 state,
2105                                 // into starting their burst, as it shows
2106                                 // that we're happy.
2107                                 this->LinkState = CONNECTED;
2108                                 // we should add the details of this server now
2109                                 // to the servers tree, as a child of the root
2110                                 // node.
2111                                 TreeServer* Node = new TreeServer(sname,description,TreeRoot,this);
2112                                 TreeRoot->AddChild(Node);
2113                                 params[3] = ":" + params[3];
2114                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2115                                 this->bursting = true;
2116                                 this->DoBurst(Node);
2117                                 return true;
2118                         }
2119                 }
2120                 this->WriteLine("ERROR :Invalid credentials");
2121                 Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2122                 return false;
2123         }
2124
2125         bool Inbound_Server(std::deque<std::string> &params)
2126         {
2127                 if (params.size() < 4)
2128                         return false;
2129
2130                 irc::string servername = params[0].c_str();
2131                 std::string sname = params[0];
2132                 std::string password = params[1];
2133                 int hops = atoi(params[2].c_str());
2134
2135                 if (hops)
2136                 {
2137                         this->WriteLine("ERROR :Server too far away for authentication");
2138                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2139                         return false;
2140                 }
2141                 std::string description = params[3];
2142                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2143                 {
2144                         if ((x->Name == servername) && (x->RecvPass == password))
2145                         {
2146                                 TreeServer* CheckDupe = FindServer(sname);
2147                                 if (CheckDupe)
2148                                 {
2149                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2150                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2151                                         return false;
2152                                 }
2153                                 /* If the config says this link is encrypted, but the remote side
2154                                  * hasnt bothered to send the AES command before SERVER, then we
2155                                  * boot them off as we MUST have this connection encrypted.
2156                                  */
2157                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2158                                 {
2159                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2160                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2161                                         return false;
2162                                 }
2163                                 Srv->SendOpers("*** Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2164                                 this->InboundServerName = sname;
2165                                 this->InboundDescription = description;
2166                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2167                                 // along with the sendpass from this block.
2168                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
2169                                 // move to the next state, we are now waiting for THEM.
2170                                 this->LinkState = WAIT_AUTH_2;
2171                                 return true;
2172                         }
2173                 }
2174                 this->WriteLine("ERROR :Invalid credentials");
2175                 Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2176                 return false;
2177         }
2178
2179         void Split(std::string line, bool stripcolon, std::deque<std::string> &n)
2180         {
2181                 // we don't do anything with a line > 2048
2182                 if (line.length() > 2048)
2183                 {
2184                         log(DEBUG,"Line too long!");
2185                         return;
2186                 }
2187                 if (!strchr(line.c_str(),' '))
2188                 {
2189                         n.push_back(line);
2190                         return;
2191                 }
2192                 std::stringstream s(line);
2193                 int count = 0;
2194                 char param[1024];
2195                 char* pptr = param;
2196
2197                 n.clear();
2198                 int item = 0;
2199                 while (!s.eof())
2200                 {
2201                         char c = 0;
2202                         s.get(c);
2203                         if (c == ' ')
2204                         {
2205                                 *pptr = 0;
2206                                 if (*param)
2207                                         n.push_back(param);
2208                                 *param = count = 0;
2209                                 pptr = param;
2210                                 item++;
2211                         }
2212                         else
2213                         {
2214                                 if (!s.eof())
2215                                 {
2216                                         *pptr++ = c;
2217                                         count++;
2218                                 }
2219                                 if ((*param == ':') && (count == 1) && (item > 0))
2220                                 {
2221                                         *param = count = 0;
2222                                         pptr = param;
2223                                         while (!s.eof())
2224                                         {
2225                                                 s.get(c);
2226                                                 if (!s.eof())
2227                                                 {
2228                                                         *pptr++ = c;
2229                                                         count++;
2230                                                 }
2231                                         }
2232                                         *pptr = 0;
2233                                         n.push_back(param);
2234                                         *param = count = 0;
2235                                         pptr = param;
2236                                 }
2237                         }
2238                 }
2239                 *pptr = 0;
2240                 if (*param)
2241                 {
2242                         n.push_back(param);
2243                 }
2244
2245                 return;
2246         }
2247
2248         bool ProcessLine(std::string line)
2249         {
2250                 std::deque<std::string> params;
2251                 irc::string command;
2252                 std::string prefix;
2253
2254                 if (line.empty())
2255                         return true;
2256
2257                 line = line.substr(0, line.find_first_of("\r\n"));
2258
2259                 log(DEBUG,"IN: %s", line.c_str());
2260
2261                 this->Split(line.c_str(),true,params);
2262
2263                 if ((params[0][0] == ':') && (params.size() > 1))
2264                 {
2265                         prefix = params[0].substr(1);
2266                         params.pop_front();
2267                 }
2268
2269                 command = params[0].c_str();
2270                 params.pop_front();
2271
2272                 if ((!this->ctx_in) && (command == "AES"))
2273                 {
2274                         std::string sserv = params[0];
2275                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2276                         {
2277                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2278                                 {
2279                                         this->InitAES(x->EncryptionKey,sserv);
2280                                 }
2281                         }
2282
2283                         return true;
2284                 }
2285                 else if ((this->ctx_in) && (command == "AES"))
2286                 {
2287                         WriteOpers("*** \2AES\2: Encryption already enabled on this connection yet %s is trying to enable it twice!",params[0].c_str());
2288                 }
2289
2290                 switch (this->LinkState)
2291                 {
2292                         TreeServer* Node;
2293
2294                         case WAIT_AUTH_1:
2295                                 // Waiting for SERVER command from remote server. Server initiating
2296                                 // the connection sends the first SERVER command, listening server
2297                                 // replies with theirs if its happy, then if the initiator is happy,
2298                                 // it starts to send its net sync, which starts the merge, otherwise
2299                                 // it sends an ERROR.
2300                                 if (command == "PASS")
2301                                 {
2302                                         /* Silently ignored */
2303                                 }
2304                                 else if (command == "SERVER")
2305                                 {
2306                                         return this->Inbound_Server(params);
2307                                 }
2308                                 else if (command == "ERROR")
2309                                 {
2310                                         return this->Error(params);
2311                                 }
2312                                 else if (command == "USER")
2313                                 {
2314                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2315                                         return false;
2316                                 }
2317                                 else if (command == "CAPAB")
2318                                 {
2319                                         return this->Capab(params);
2320                                 }
2321                                 else if ((command == "U") || (command == "S"))
2322                                 {
2323                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2324                                         return false;
2325                                 }
2326                                 else
2327                                 {
2328                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2329                                         return false;
2330                                 }
2331                         break;
2332                         case WAIT_AUTH_2:
2333                                 // Waiting for start of other side's netmerge to say they liked our
2334                                 // password.
2335                                 if (command == "SERVER")
2336                                 {
2337                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2338                                         // silently ignore.
2339                                         return true;
2340                                 }
2341                                 else if ((command == "U") || (command == "S"))
2342                                 {
2343                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2344                                         return false;
2345                                 }
2346                                 else if (command == "BURST")
2347                                 {
2348                                         if (params.size())
2349                                         {
2350                                                 /* If a time stamp is provided, try and check syncronization */
2351                                                 time_t THEM = atoi(params[0].c_str());
2352                                                 long delta = THEM-time(NULL);
2353                                                 if ((delta < -600) || (delta > 600))
2354                                                 {
2355                                                         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));
2356                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2357                                                         return false;
2358                                                 }
2359                                                 else if ((delta < -60) || (delta > 60))
2360                                                 {
2361                                                         WriteOpers("*** \2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2362                                                 }
2363                                         }
2364                                         this->LinkState = CONNECTED;
2365                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
2366                                         TreeRoot->AddChild(Node);
2367                                         params.clear();
2368                                         params.push_back(InboundServerName);
2369                                         params.push_back("*");
2370                                         params.push_back("1");
2371                                         params.push_back(":"+InboundDescription);
2372                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2373                                         this->bursting = true;
2374                                         this->DoBurst(Node);
2375                                 }
2376                                 else if (command == "ERROR")
2377                                 {
2378                                         return this->Error(params);
2379                                 }
2380                                 else if (command == "CAPAB")
2381                                 {
2382                                         return this->Capab(params);
2383                                 }
2384
2385                         break;
2386                         case LISTENER:
2387                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2388                                 return false;
2389                         break;
2390                         case CONNECTING:
2391                                 if (command == "SERVER")
2392                                 {
2393                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2394                                         // has just sent us their credentials. If we get this far, theyre
2395                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2396                                         // if we're happy with this, we should send our netburst which
2397                                         // kickstarts the merge.
2398                                         return this->Outbound_Reply_Server(params);
2399                                 }
2400                                 else if (command == "ERROR")
2401                                 {
2402                                         return this->Error(params);
2403                                 }
2404                         break;
2405                         case CONNECTED:
2406                                 // This is the 'authenticated' state, when all passwords
2407                                 // have been exchanged and anything past this point is taken
2408                                 // as gospel.
2409
2410                                 if (prefix != "")
2411                                 {
2412                                         std::string direction = prefix;
2413                                         userrec* t = Srv->FindNick(prefix);
2414                                         if (t)
2415                                         {
2416                                                 direction = t->server;
2417                                         }
2418                                         TreeServer* route_back_again = BestRouteTo(direction);
2419                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2420                                         {
2421                                                 if (route_back_again)
2422                                                         log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2423                                                 return true;
2424                                         }
2425
2426                                         /* Fix by brain:
2427                                          * When there is activity on the socket, reset the ping counter so
2428                                          * that we're not wasting bandwidth pinging an active server.
2429                                          */
2430                                         route_back_again->SetNextPingTime(time(NULL) + 120);
2431                                         route_back_again->SetPingFlag();
2432                                 }
2433
2434                                 if (command == "SVSMODE")
2435                                 {
2436                                         /* Services expects us to implement
2437                                          * SVSMODE. In inspircd its the same as
2438                                          * MODE anyway.
2439                                          */
2440                                         command = "MODE";
2441                                 }
2442                                 std::string target = "";
2443                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
2444                                  * working with std::string here.
2445                                  */
2446                                 if ((command == "NICK") && (params.size() > 1))
2447                                 {
2448                                         return this->IntroduceClient(prefix,params);
2449                                 }
2450                                 else if (command == "FJOIN")
2451                                 {
2452                                         return this->ForceJoin(prefix,params);
2453                                 }
2454                                 else if (command == "SERVER")
2455                                 {
2456                                         return this->RemoteServer(prefix,params);
2457                                 }
2458                                 else if (command == "ERROR")
2459                                 {
2460                                         return this->Error(params);
2461                                 }
2462                                 else if (command == "OPERTYPE")
2463                                 {
2464                                         return this->OperType(prefix,params);
2465                                 }
2466                                 else if (command == "FMODE")
2467                                 {
2468                                         return this->ForceMode(prefix,params);
2469                                 }
2470                                 else if (command == "KILL")
2471                                 {
2472                                         return this->RemoteKill(prefix,params);
2473                                 }
2474                                 else if (command == "FTOPIC")
2475                                 {
2476                                         return this->ForceTopic(prefix,params);
2477                                 }
2478                                 else if (command == "REHASH")
2479                                 {
2480                                         return this->RemoteRehash(prefix,params);
2481                                 }
2482                                 else if (command == "METADATA")
2483                                 {
2484                                         return this->MetaData(prefix,params);
2485                                 }
2486                                 else if (command == "PING")
2487                                 {
2488                                         /*
2489                                          * We just got a ping from a server that's bursting.
2490                                          * This can't be right, so set them to not bursting, and
2491                                          * apply their lines.
2492                                          */
2493                                         if (this->bursting)
2494                                         {
2495                                                 this->bursting = false;
2496                                                 apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2497                                         }
2498                                         if (prefix == "")
2499                                         {
2500                                                 prefix = this->GetName();
2501                                         }
2502                                         return this->LocalPing(prefix,params);
2503                                 }
2504                                 else if (command == "PONG")
2505                                 {
2506                                         /*
2507                                          * We just got a pong from a server that's bursting.
2508                                          * This can't be right, so set them to not bursting, and
2509                                          * apply their lines.
2510                                          */
2511                                         if (this->bursting)
2512                                         {
2513                                                 this->bursting = false;
2514                                                 apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2515                                         }
2516                                         if (prefix == "")
2517                                         {
2518                                                 prefix = this->GetName();
2519                                         }
2520                                         return this->LocalPong(prefix,params);
2521                                 }
2522                                 else if (command == "VERSION")
2523                                 {
2524                                         return this->ServerVersion(prefix,params);
2525                                 }
2526                                 else if (command == "FHOST")
2527                                 {
2528                                         return this->ChangeHost(prefix,params);
2529                                 }
2530                                 else if (command == "FNAME")
2531                                 {
2532                                         return this->ChangeName(prefix,params);
2533                                 }
2534                                 else if (command == "ADDLINE")
2535                                 {
2536                                         return this->AddLine(prefix,params);
2537                                 }
2538                                 else if (command == "SVSNICK")
2539                                 {
2540                                         if (prefix == "")
2541                                         {
2542                                                 prefix = this->GetName();
2543                                         }
2544                                         return this->ForceNick(prefix,params);
2545                                 }
2546                                 else if (command == "IDLE")
2547                                 {
2548                                         return this->Whois(prefix,params);
2549                                 }
2550                                 else if (command == "PUSH")
2551                                 {
2552                                         return this->Push(prefix,params);
2553                                 }
2554                                 else if (command == "TIME")
2555                                 {
2556                                         return this->Time(prefix,params);
2557                                 }
2558                                 else if ((command == "KICK") && (IsServer(prefix)))
2559                                 {
2560                                         std::string sourceserv = this->myhost;
2561                                         if (params.size() == 3)
2562                                         {
2563                                                 userrec* user = Srv->FindNick(params[1]);
2564                                                 chanrec* chan = Srv->FindChannel(params[0]);
2565                                                 if (user && chan)
2566                                                 {
2567                                                         server_kick_channel(user,chan,(char*)params[2].c_str(),false);
2568                                                 }
2569                                         }
2570                                         if (this->InboundServerName != "")
2571                                         {
2572                                                 sourceserv = this->InboundServerName;
2573                                         }
2574                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2575                                 }
2576                                 else if (command == "SVSJOIN")
2577                                 {
2578                                         if (prefix == "")
2579                                         {
2580                                                 prefix = this->GetName();
2581                                         }
2582                                         return this->ServiceJoin(prefix,params);
2583                                 }
2584                                 else if (command == "SQUIT")
2585                                 {
2586                                         if (params.size() == 2)
2587                                         {
2588                                                 this->Squit(FindServer(params[0]),params[1]);
2589                                         }
2590                                         return true;
2591                                 }
2592                                 else if (command == "ENDBURST")
2593                                 {
2594                                         this->bursting = false;
2595                                         apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2596                                         std::string sourceserv = this->myhost;
2597                                         if (this->InboundServerName != "")
2598                                         {
2599                                                 sourceserv = this->InboundServerName;
2600                                         }
2601                                         WriteOpers("*** Received end of netburst from \2%s\2",sourceserv.c_str());
2602                                         return true;
2603                                 }
2604                                 else
2605                                 {
2606                                         // not a special inter-server command.
2607                                         // Emulate the actual user doing the command,
2608                                         // this saves us having a huge ugly parser.
2609                                         userrec* who = Srv->FindNick(prefix);
2610                                         std::string sourceserv = this->myhost;
2611                                         if (this->InboundServerName != "")
2612                                         {
2613                                                 sourceserv = this->InboundServerName;
2614                                         }
2615                                         if (who)
2616                                         {
2617                                                 if ((command == "NICK") && (params.size() > 0))
2618                                                 {
2619                                                         /* On nick messages, check that the nick doesnt
2620                                                          * already exist here. If it does, kill their copy,
2621                                                          * and our copy.
2622                                                          */
2623                                                         userrec* x = Srv->FindNick(params[0]);
2624                                                         if ((x) && (x != who))
2625                                                         {
2626                                                                 std::deque<std::string> p;
2627                                                                 p.push_back(params[0]);
2628                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
2629                                                                 DoOneToMany(Srv->GetServerName(),"KILL",p);
2630                                                                 p.clear();
2631                                                                 p.push_back(prefix);
2632                                                                 p.push_back("Nickname collision");
2633                                                                 DoOneToMany(Srv->GetServerName(),"KILL",p);
2634                                                                 Srv->QuitUser(x,"Nickname collision ("+prefix+" -> "+params[0]+")");
2635                                                                 userrec* y = Srv->FindNick(prefix);
2636                                                                 if (y)
2637                                                                 {
2638                                                                         Srv->QuitUser(y,"Nickname collision");
2639                                                                 }
2640                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2641                                                         }
2642                                                 }
2643                                                 // its a user
2644                                                 target = who->server;
2645                                                 const char* strparams[127];
2646                                                 for (unsigned int q = 0; q < params.size(); q++)
2647                                                 {
2648                                                         strparams[q] = params[q].c_str();
2649                                                 }
2650                                                 if (!Srv->CallCommandHandler(command.c_str(), strparams, params.size(), who))
2651                                                 {
2652                                                         this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
2653                                                         return false;
2654                                                 }
2655                                         }
2656                                         else
2657                                         {
2658                                                 // its not a user. Its either a server, or somethings screwed up.
2659                                                 if (IsServer(prefix))
2660                                                 {
2661                                                         target = Srv->GetServerName();
2662                                                 }
2663                                                 else
2664                                                 {
2665                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
2666                                                         return true;
2667                                                 }
2668                                         }
2669                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2670
2671                                 }
2672                                 return true;
2673                         break;
2674                 }
2675                 return true;
2676         }
2677
2678         virtual std::string GetName()
2679         {
2680                 std::string sourceserv = this->myhost;
2681                 if (this->InboundServerName != "")
2682                 {
2683                         sourceserv = this->InboundServerName;
2684                 }
2685                 return sourceserv;
2686         }
2687
2688         virtual void OnTimeout()
2689         {
2690                 if (this->LinkState == CONNECTING)
2691                 {
2692                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
2693                 }
2694         }
2695
2696         virtual void OnClose()
2697         {
2698                 // Connection closed.
2699                 // If the connection is fully up (state CONNECTED)
2700                 // then propogate a netsplit to all peers.
2701                 std::string quitserver = this->myhost;
2702                 if (this->InboundServerName != "")
2703                 {
2704                         quitserver = this->InboundServerName;
2705                 }
2706                 TreeServer* s = FindServer(quitserver);
2707                 if (s)
2708                 {
2709                         Squit(s,"Remote host closed the connection");
2710                 }
2711                 WriteOpers("Server '\2%s\2' closed the connection.",quitserver.c_str());
2712         }
2713
2714         virtual int OnIncomingConnection(int newsock, char* ip)
2715         {
2716                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
2717                  * or discovering if this port is the server port, we don't allow connections from any
2718                  * IPs for which we don't have a link block.
2719                  */
2720                 bool found = false;
2721                 char resolved_host[MAXBUF];
2722                 vector<Link>::iterator i;
2723                 for (i = LinkBlocks.begin(); i != LinkBlocks.end(); i++)
2724                 {
2725                         if (i->IPAddr == ip)
2726                         {
2727                                 found = true;
2728                                 break;
2729                         }
2730                         /* XXX: Fixme: blocks for a very short amount of time,
2731                          * we should cache these on rehash/startup
2732                          */
2733                         if (CleanAndResolve(resolved_host,i->IPAddr.c_str(),true))
2734                         {
2735                                 if (std::string(resolved_host) == ip)
2736                                 {
2737                                         found = true;
2738                                         break;
2739                                 }
2740                         }
2741                 }
2742                 if (!found)
2743                 {
2744                         WriteOpers("Server connection from %s denied (no link blocks with that IP address)", ip);
2745                         close(newsock);
2746                         return false;
2747                 }
2748                 TreeSocket* s = new TreeSocket(newsock, ip);
2749                 Srv->AddSocket(s);
2750                 return true;
2751         }
2752 };
2753
2754 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
2755 {
2756         for (unsigned int c = 0; c < list.size(); c++)
2757         {
2758                 if (list[c] == server)
2759                 {
2760                         return;
2761                 }
2762         }
2763         list.push_back(server);
2764 }
2765
2766 // returns a list of DIRECT servernames for a specific channel
2767 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
2768 {
2769         CUList *ulist = c->GetUsers();
2770         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2771         {
2772                 if (i->second->fd < 0)
2773                 {
2774                         TreeServer* best = BestRouteTo(i->second->server);
2775                         if (best)
2776                                 AddThisServer(best,list);
2777                 }
2778         }
2779         return;
2780 }
2781
2782 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
2783 {
2784         TreeServer* omitroute = BestRouteTo(omit);
2785         if ((command == "NOTICE") || (command == "PRIVMSG"))
2786         {
2787                 if (params.size() >= 2)
2788                 {
2789                         /* Prefixes */
2790                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
2791                         {
2792                                 params[0] = params[0].substr(1, params[0].length()-1);
2793                         }
2794                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
2795                         {
2796                                 // special routing for private messages/notices
2797                                 userrec* d = Srv->FindNick(params[0]);
2798                                 if (d)
2799                                 {
2800                                         std::deque<std::string> par;
2801                                         par.push_back(params[0]);
2802                                         par.push_back(":"+params[1]);
2803                                         DoOneToOne(prefix,command.c_str(),par,d->server);
2804                                         return true;
2805                                 }
2806                         }
2807                         else if (*(params[0].c_str()) == '$')
2808                         {
2809                                 std::deque<std::string> par;
2810                                 par.push_back(params[0]);
2811                                 par.push_back(":"+params[1]);
2812                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
2813                                 return true;
2814                         }
2815                         else
2816                         {
2817                                 log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
2818                                 chanrec* c = Srv->FindChannel(params[0]);
2819                                 if (c)
2820                                 {
2821                                         std::deque<TreeServer*> list;
2822                                         GetListOfServersForChannel(c,list);
2823                                         log(DEBUG,"Got a list of %d servers",list.size());
2824                                         unsigned int lsize = list.size();
2825                                         for (unsigned int i = 0; i < lsize; i++)
2826                                         {
2827                                                 TreeSocket* Sock = list[i]->GetSocket();
2828                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
2829                                                 {
2830                                                         log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
2831                                                         Sock->WriteLine(data);
2832                                                 }
2833                                         }
2834                                         return true;
2835                                 }
2836                         }
2837                 }
2838         }
2839         unsigned int items = TreeRoot->ChildCount();
2840         for (unsigned int x = 0; x < items; x++)
2841         {
2842                 TreeServer* Route = TreeRoot->GetChild(x);
2843                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
2844                 {
2845                         TreeSocket* Sock = Route->GetSocket();
2846                         Sock->WriteLine(data);
2847                 }
2848         }
2849         return true;
2850 }
2851
2852 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
2853 {
2854         TreeServer* omitroute = BestRouteTo(omit);
2855         std::string FullLine = ":" + prefix + " " + command;
2856         unsigned int words = params.size();
2857         for (unsigned int x = 0; x < words; x++)
2858         {
2859                 FullLine = FullLine + " " + params[x];
2860         }
2861         unsigned int items = TreeRoot->ChildCount();
2862         for (unsigned int x = 0; x < items; x++)
2863         {
2864                 TreeServer* Route = TreeRoot->GetChild(x);
2865                 // Send the line IF:
2866                 // The route has a socket (its a direct connection)
2867                 // The route isnt the one to be omitted
2868                 // The route isnt the path to the one to be omitted
2869                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
2870                 {
2871                         TreeSocket* Sock = Route->GetSocket();
2872                         Sock->WriteLine(FullLine);
2873                 }
2874         }
2875         return true;
2876 }
2877
2878 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
2879 {
2880         std::string FullLine = ":" + prefix + " " + command;
2881         unsigned int words = params.size();
2882         for (unsigned int x = 0; x < words; x++)
2883         {
2884                 FullLine = FullLine + " " + params[x];
2885         }
2886         unsigned int items = TreeRoot->ChildCount();
2887         for (unsigned int x = 0; x < items; x++)
2888         {
2889                 TreeServer* Route = TreeRoot->GetChild(x);
2890                 if (Route->GetSocket())
2891                 {
2892                         TreeSocket* Sock = Route->GetSocket();
2893                         Sock->WriteLine(FullLine);
2894                 }
2895         }
2896         return true;
2897 }
2898
2899 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
2900 {
2901         TreeServer* Route = BestRouteTo(target);
2902         if (Route)
2903         {
2904                 std::string FullLine = ":" + prefix + " " + command;
2905                 unsigned int words = params.size();
2906                 for (unsigned int x = 0; x < words; x++)
2907                 {
2908                         FullLine = FullLine + " " + params[x];
2909                 }
2910                 if (Route->GetSocket())
2911                 {
2912                         TreeSocket* Sock = Route->GetSocket();
2913                         Sock->WriteLine(FullLine);
2914                 }
2915                 return true;
2916         }
2917         else
2918         {
2919                 return true;
2920         }
2921 }
2922
2923 std::vector<TreeSocket*> Bindings;
2924
2925 void ReadConfiguration(bool rebind)
2926 {
2927         Conf = new ConfigReader;
2928         if (rebind)
2929         {
2930                 for (int j =0; j < Conf->Enumerate("bind"); j++)
2931                 {
2932                         std::string Type = Conf->ReadValue("bind","type",j);
2933                         std::string IP = Conf->ReadValue("bind","address",j);
2934                         long Port = Conf->ReadInteger("bind","port",j,true);
2935                         if (Type == "servers")
2936                         {
2937                                 if (IP == "*")
2938                                 {
2939                                         IP = "";
2940                                 }
2941                                 TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
2942                                 if (listener->GetState() == I_LISTENING)
2943                                 {
2944                                         Srv->AddSocket(listener);
2945                                         Bindings.push_back(listener);
2946                                 }
2947                                 else
2948                                 {
2949                                         log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
2950                                         listener->Close();
2951                                         DELETE(listener);
2952                                 }
2953                         }
2954                 }
2955         }
2956         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
2957         HideULines = Conf->ReadFlag("options","hideulines",0);
2958         LinkBlocks.clear();
2959         for (int j =0; j < Conf->Enumerate("link"); j++)
2960         {
2961                 Link L;
2962                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
2963                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
2964                 L.Port = Conf->ReadInteger("link","port",j,true);
2965                 L.SendPass = Conf->ReadValue("link","sendpass",j);
2966                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
2967                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
2968                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
2969                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
2970                 L.NextConnectTime = time(NULL) + L.AutoConnect;
2971                 /* Bugfix by brain, do not allow people to enter bad configurations */
2972                 if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
2973                 {
2974                         LinkBlocks.push_back(L);
2975                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
2976                 }
2977                 else
2978                 {
2979                         if (L.IPAddr == "")
2980                         {
2981                                 log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
2982                         }
2983                         else if (L.RecvPass == "")
2984                         {
2985                                 log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
2986                         }
2987                         else if (L.SendPass == "")
2988                         {
2989                                 log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
2990                         }
2991                         else if (L.Name == "")
2992                         {
2993                                 log(DEFAULT,"Invalid configuration, link tag without a name!");
2994                         }
2995                         else if (!L.Port)
2996                         {
2997                                 log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
2998                         }
2999                 }
3000         }
3001         DELETE(Conf);
3002 }
3003
3004
3005 class ModuleSpanningTree : public Module
3006 {
3007         std::vector<TreeSocket*> Bindings;
3008         int line;
3009         int NumServers;
3010         unsigned int max_local;
3011         unsigned int max_global;
3012         cmd_rconnect* command_rconnect;
3013
3014  public:
3015
3016         ModuleSpanningTree(Server* Me)
3017                 : Module::Module(Me), max_local(0), max_global(0)
3018         {
3019                 Srv = Me;
3020                 Bindings.clear();
3021
3022                 // Create the root of the tree
3023                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
3024
3025                 ReadConfiguration(true);
3026
3027                 command_rconnect = new cmd_rconnect(this);
3028                 Srv->AddCommand(command_rconnect);
3029         }
3030
3031         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3032         {
3033                 std::string Parent = TreeRoot->GetName();
3034                 if (Current->GetParent())
3035                 {
3036                         Parent = Current->GetParent()->GetName();
3037                 }
3038                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3039                 {
3040                         if ((HideULines) && (Srv->IsUlined(Current->GetChild(q)->GetName())))
3041                         {
3042                                 if (*user->oper)
3043                                 {
3044                                          ShowLinks(Current->GetChild(q),user,hops+1);
3045                                 }
3046                         }
3047                         else
3048                         {
3049                                 ShowLinks(Current->GetChild(q),user,hops+1);
3050                         }
3051                 }
3052                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3053                 if ((HideULines) && (Srv->IsUlined(Current->GetName())) && (!*user->oper))
3054                         return;
3055                 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());
3056         }
3057
3058         int CountLocalServs()
3059         {
3060                 return TreeRoot->ChildCount();
3061         }
3062
3063         int CountServs()
3064         {
3065                 return serverlist.size();
3066         }
3067
3068         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3069         {
3070                 ShowLinks(TreeRoot,user,0);
3071                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
3072                 return;
3073         }
3074
3075         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3076         {
3077                 unsigned int n_users = usercnt();
3078
3079                 /* Only update these when someone wants to see them, more efficient */
3080                 if ((unsigned int)local_count() > max_local)
3081                         max_local = local_count();
3082                 if (n_users > max_global)
3083                         max_global = n_users;
3084
3085                 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());
3086                 if (usercount_opers())
3087                         WriteServ(user->fd,"252 %s %d :operator(s) online",user->nick,usercount_opers());
3088                 if (usercount_unknown())
3089                         WriteServ(user->fd,"253 %s %d :unknown connections",user->nick,usercount_unknown());
3090                 if (chancount())
3091                         WriteServ(user->fd,"254 %s %d :channels formed",user->nick,chancount());
3092                 WriteServ(user->fd,"254 %s :I have %d clients and %d servers",user->nick,local_count(),this->CountLocalServs());
3093                 WriteServ(user->fd,"265 %s :Current Local Users: %d  Max: %d",user->nick,local_count(),max_local);
3094                 WriteServ(user->fd,"266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3095                 return;
3096         }
3097
3098         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3099
3100         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3101         {
3102                 if (line < 128)
3103                 {
3104                         for (int t = 0; t < depth; t++)
3105                         {
3106                                 matrix[line][t] = ' ';
3107                         }
3108
3109                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3110                         // a 'Spacer' String to compensate.
3111                         char spacer[40];
3112
3113                         memset(spacer,' ',40);
3114                         if ((40 - Current->GetName().length() - depth) > 1) {
3115                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3116                         }
3117                         else
3118                         {
3119                                 spacer[5] = '\0';
3120                         }
3121
3122                         float percent;
3123                         char text[80];
3124                         if (clientlist.size() == 0) {
3125                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3126                                 percent = 0;
3127                         }
3128                         else
3129                         {
3130                                 percent = ((float)Current->GetUserCount() / (float)clientlist.size()) * 100;
3131                         }
3132                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3133                         totusers += Current->GetUserCount();
3134                         totservers++;
3135                         strlcpy(&matrix[line][depth],text,80);
3136                         line++;
3137                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3138                         {
3139                                 if ((HideULines) && (Srv->IsUlined(Current->GetChild(q)->GetName())))
3140                                 {
3141                                         if (*user->oper)
3142                                         {
3143                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3144                                         }
3145                                 }
3146                                 else
3147                                 {
3148                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3149                                 }
3150                         }
3151                 }
3152         }
3153
3154         // Ok, prepare to be confused.
3155         // After much mulling over how to approach this, it struck me that
3156         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3157         // keeping track of a ton of ascii characters, and line by line
3158         // under recursion working out where to place them using multiplications
3159         // and divisons, we instead render the map onto a backplane of characters
3160         // (a character matrix), then draw the branches as a series of "L" shapes
3161         // from the nodes. This is not only friendlier on CPU it uses less stack.
3162
3163         void HandleMap(const char** parameters, int pcnt, userrec* user)
3164         {
3165                 // This array represents a virtual screen which we will
3166                 // "scratch" draw to, as the console device of an irc
3167                 // client does not provide for a proper terminal.
3168                 float totusers = 0;
3169                 float totservers = 0;
3170                 char matrix[128][80];
3171                 for (unsigned int t = 0; t < 128; t++)
3172                 {
3173                         matrix[t][0] = '\0';
3174                 }
3175                 line = 0;
3176                 // The only recursive bit is called here.
3177                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3178                 // Process each line one by one. The algorithm has a limit of
3179                 // 128 servers (which is far more than a spanning tree should have
3180                 // anyway, so we're ok). This limit can be raised simply by making
3181                 // the character matrix deeper, 128 rows taking 10k of memory.
3182                 for (int l = 1; l < line; l++)
3183                 {
3184                         // scan across the line looking for the start of the
3185                         // servername (the recursive part of the algorithm has placed
3186                         // the servers at indented positions depending on what they
3187                         // are related to)
3188                         int first_nonspace = 0;
3189                         while (matrix[l][first_nonspace] == ' ')
3190                         {
3191                                 first_nonspace++;
3192                         }
3193                         first_nonspace--;
3194                         // Draw the `- (corner) section: this may be overwritten by
3195                         // another L shape passing along the same vertical pane, becoming
3196                         // a |- (branch) section instead.
3197                         matrix[l][first_nonspace] = '-';
3198                         matrix[l][first_nonspace-1] = '`';
3199                         int l2 = l - 1;
3200                         // Draw upwards until we hit the parent server, causing possibly
3201                         // other corners (`-) to become branches (|-)
3202                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3203                         {
3204                                 matrix[l2][first_nonspace-1] = '|';
3205                                 l2--;
3206                         }
3207                 }
3208                 // dump the whole lot to the user. This is the easy bit, honest.
3209                 for (int t = 0; t < line; t++)
3210                 {
3211                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
3212                 }
3213                 float avg_users = totusers / totservers;
3214                 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);
3215         WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
3216                 return;
3217         }
3218
3219         int HandleSquit(const char** parameters, int pcnt, userrec* user)
3220         {
3221                 TreeServer* s = FindServerMask(parameters[0]);
3222                 if (s)
3223                 {
3224                         if (s == TreeRoot)
3225                         {
3226                                  WriteServ(user->fd,"NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
3227                                 return 1;
3228                         }
3229                         TreeSocket* sock = s->GetSocket();
3230                         if (sock)
3231                         {
3232                                 log(DEBUG,"Splitting server %s",s->GetName().c_str());
3233                                 WriteOpers("*** SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
3234                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
3235                                 Srv->RemoveSocket(sock);
3236                         }
3237                         else
3238                         {
3239                                 WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
3240                         }
3241                 }
3242                 else
3243                 {
3244                          WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
3245                 }
3246                 return 1;
3247         }
3248
3249         int HandleTime(const char** parameters, int pcnt, userrec* user)
3250         {
3251                 if ((user->fd > -1) && (pcnt))
3252                 {
3253                         TreeServer* found = FindServerMask(parameters[0]);
3254                         if (found)
3255                         {
3256                                 // we dont' override for local server
3257                                 if (found == TreeRoot)
3258                                         return 0;
3259
3260                                 std::deque<std::string> params;
3261                                 params.push_back(found->GetName());
3262                                 params.push_back(user->nick);
3263                                 DoOneToOne(Srv->GetServerName(),"TIME",params,found->GetName());
3264                         }
3265                         else
3266                         {
3267                                 WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
3268                         }
3269                 }
3270                 return 1;
3271         }
3272
3273         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
3274         {
3275                 if ((user->fd > -1) && (pcnt > 1))
3276                 {
3277                         userrec* remote = Srv->FindNick(parameters[1]);
3278                         if ((remote) && (remote->fd < 0))
3279                         {
3280                                 std::deque<std::string> params;
3281                                 params.push_back(parameters[1]);
3282                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
3283                                 return 1;
3284                         }
3285                         else if (!remote)
3286                         {
3287                                 WriteServ(user->fd,"401 %s %s :No such nick/channel",user->nick, parameters[1]);
3288                                 WriteServ(user->fd,"318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
3289                                 return 1;
3290                         }
3291                 }
3292                 return 0;
3293         }
3294
3295         void DoPingChecks(time_t curtime)
3296         {
3297                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
3298                 {
3299                         TreeServer* serv = TreeRoot->GetChild(j);
3300                         TreeSocket* sock = serv->GetSocket();
3301                         if (sock)
3302                         {
3303                                 if (curtime >= serv->NextPingTime())
3304                                 {
3305                                         if (serv->AnsweredLastPing())
3306                                         {
3307                                                 sock->WriteLine(":"+Srv->GetServerName()+" PING "+serv->GetName());
3308                                                 serv->SetNextPingTime(curtime + 120);
3309                                         }
3310                                         else
3311                                         {
3312                                                 // they didnt answer, boot them
3313                                                 WriteOpers("*** Server \002%s\002 pinged out",serv->GetName().c_str());
3314                                                 sock->Squit(serv,"Ping timeout");
3315                                                 Srv->RemoveSocket(sock);
3316                                                 return;
3317                                         }
3318                                 }
3319                         }
3320                 }
3321         }
3322
3323         void AutoConnectServers(time_t curtime)
3324         {
3325                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3326                 {
3327                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
3328                         {
3329                                 log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
3330                                 x->NextConnectTime = curtime + x->AutoConnect;
3331                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3332                                 if (!CheckDupe)
3333                                 {
3334                                         // an autoconnected server is not connected. Check if its time to connect it
3335                                         WriteOpers("*** AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
3336                                         TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name.c_str());
3337                                         if (newsocket->GetFd() > -1)
3338                                         {
3339                                                 Srv->AddSocket(newsocket);
3340                                         }
3341                                         else
3342                                         {
3343                                                 WriteOpers("*** AUTOCONNECT: Error autoconnecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
3344                                                 DELETE(newsocket);
3345                                         }
3346                                 }
3347                         }
3348                 }
3349         }
3350
3351         int HandleVersion(const char** parameters, int pcnt, userrec* user)
3352         {
3353                 // we've already checked if pcnt > 0, so this is safe
3354                 TreeServer* found = FindServerMask(parameters[0]);
3355                 if (found)
3356                 {
3357                         std::string Version = found->GetVersion();
3358                         WriteServ(user->fd,"351 %s :%s",user->nick,Version.c_str());
3359                         if (found == TreeRoot)
3360                         {
3361                                 std::stringstream out(Config->data005);
3362                                 std::string token = "";
3363                                 std::string line5 = "";
3364                                 int token_counter = 0;
3365
3366                                 while (!out.eof())
3367                                 {
3368                                         out >> token;
3369                                         line5 = line5 + token + " ";
3370                                         token_counter++;
3371
3372                                         if ((token_counter >= 13) || (out.eof() == true))
3373                                         {
3374                                                 WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
3375                                                 line5 = "";
3376                                                 token_counter = 0;
3377                                         }
3378                                 }
3379                         }
3380                 }
3381                 else
3382                 {
3383                         WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
3384                 }
3385                 return 1;
3386         }
3387
3388         int HandleConnect(const char** parameters, int pcnt, userrec* user)
3389         {
3390                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3391                 {
3392                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
3393                         {
3394                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3395                                 if (!CheckDupe)
3396                                 {
3397                                         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);
3398                                         TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name.c_str());
3399                                         if (newsocket->GetFd() > -1)
3400                                         {
3401                                                 Srv->AddSocket(newsocket);
3402                                         }
3403                                         else
3404                                         {
3405                                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Error connecting \002%s\002: %s.",user->nick,x->Name.c_str(),strerror(errno));
3406                                                 DELETE(newsocket);
3407                                         }
3408                                         return 1;
3409                                 }
3410                                 else
3411                                 {
3412                                         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());
3413                                         return 1;
3414                                 }
3415                         }
3416                 }
3417                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
3418                 return 1;
3419         }
3420
3421         virtual int OnStats(char statschar, userrec* user)
3422         {
3423                 if (statschar == 'c')
3424                 {
3425                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
3426                         {
3427                                 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');
3428                                 WriteServ(user->fd,"244 %s H * * %s",user->nick,LinkBlocks[i].Name.c_str());
3429                         }
3430                         WriteServ(user->fd,"219 %s %c :End of /STATS report",user->nick,statschar);
3431                         WriteOpers("*** Notice: Stats '%c' requested by %s (%s@%s)",statschar,user->nick,user->ident,user->host);
3432                         return 1;
3433                 }
3434                 return 0;
3435         }
3436
3437         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated)
3438         {
3439                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
3440                 if (!validated)
3441                         return 0;
3442
3443                 if (command == "CONNECT")
3444                 {
3445                         return this->HandleConnect(parameters,pcnt,user);
3446                 }
3447                 else if (command == "SQUIT")
3448                 {
3449                         return this->HandleSquit(parameters,pcnt,user);
3450                 }
3451                 else if (command == "MAP")
3452                 {
3453                         this->HandleMap(parameters,pcnt,user);
3454                         return 1;
3455                 }
3456                 else if ((command == "TIME") && (pcnt > 0))
3457                 {
3458                         return this->HandleTime(parameters,pcnt,user);
3459                 }
3460                 else if (command == "LUSERS")
3461                 {
3462                         this->HandleLusers(parameters,pcnt,user);
3463                         return 1;
3464                 }
3465                 else if (command == "LINKS")
3466                 {
3467                         this->HandleLinks(parameters,pcnt,user);
3468                         return 1;
3469                 }
3470                 else if (command == "WHOIS")
3471                 {
3472                         if (pcnt > 1)
3473                         {
3474                                 // remote whois
3475                                 return this->HandleRemoteWhois(parameters,pcnt,user);
3476                         }
3477                 }
3478                 else if ((command == "VERSION") && (pcnt > 0))
3479                 {
3480                         this->HandleVersion(parameters,pcnt,user);
3481                         return 1;
3482                 }
3483                 else if (Srv->IsValidModuleCommand(command, pcnt, user))
3484                 {
3485                         // this bit of code cleverly routes all module commands
3486                         // to all remote severs *automatically* so that modules
3487                         // can just handle commands locally, without having
3488                         // to have any special provision in place for remote
3489                         // commands and linking protocols.
3490                         std::deque<std::string> params;
3491                         params.clear();
3492                         for (int j = 0; j < pcnt; j++)
3493                         {
3494                                 if (strchr(parameters[j],' '))
3495                                 {
3496                                         params.push_back(":" + std::string(parameters[j]));
3497                                 }
3498                                 else
3499                                 {
3500                                         params.push_back(std::string(parameters[j]));
3501                                 }
3502                         }
3503                         log(DEBUG,"Globally route '%s'",command.c_str());
3504                         DoOneToMany(user->nick,command,params);
3505                 }
3506                 return 0;
3507         }
3508
3509         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
3510         {
3511                 TreeServer* s = FindServer(servername);
3512                 if (s)
3513                 {
3514                         description = s->GetDesc();
3515                 }
3516         }
3517
3518         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
3519         {
3520                 if (source->fd > -1)
3521                 {
3522                         std::deque<std::string> params;
3523                         params.push_back(dest->nick);
3524                         params.push_back(channel->name);
3525                         DoOneToMany(source->nick,"INVITE",params);
3526                 }
3527         }
3528
3529         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
3530         {
3531                 std::deque<std::string> params;
3532                 params.push_back(chan->name);
3533                 params.push_back(":"+topic);
3534                 DoOneToMany(user->nick,"TOPIC",params);
3535         }
3536
3537         virtual void OnWallops(userrec* user, const std::string &text)
3538         {
3539                 if (user->fd > -1)
3540                 {
3541                         std::deque<std::string> params;
3542                         params.push_back(":"+text);
3543                         DoOneToMany(user->nick,"WALLOPS",params);
3544                 }
3545         }
3546
3547         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
3548         {
3549                 if (target_type == TYPE_USER)
3550                 {
3551                         userrec* d = (userrec*)dest;
3552                         if ((d->fd < 0) && (user->fd > -1))
3553                         {
3554                                 std::deque<std::string> params;
3555                                 params.clear();
3556                                 params.push_back(d->nick);
3557                                 params.push_back(":"+text);
3558                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
3559                         }
3560                 }
3561                 else if (target_type == TYPE_CHANNEL)
3562                 {
3563                         if (user->fd > -1)
3564                         {
3565                                 chanrec *c = (chanrec*)dest;
3566                                 std::string cname = c->name;
3567                                 if (status)
3568                                         cname = status + cname;
3569                                 std::deque<TreeServer*> list;
3570                                 GetListOfServersForChannel(c,list);
3571                                 unsigned int ucount = list.size();
3572                                 for (unsigned int i = 0; i < ucount; i++)
3573                                 {
3574                                         TreeSocket* Sock = list[i]->GetSocket();
3575                                         if (Sock)
3576                                                 Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
3577                                 }
3578                         }
3579                 }
3580                 else if (target_type == TYPE_SERVER)
3581                 {
3582                         if (user->fd > -1)
3583                         {
3584                                 char* target = (char*)dest;
3585                                 std::deque<std::string> par;
3586                                 par.push_back(target);
3587                                 par.push_back(":"+text);
3588                                 DoOneToMany(user->nick,"NOTICE",par);
3589                         }
3590                 }
3591         }
3592
3593         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
3594         {
3595                 if (target_type == TYPE_USER)
3596                 {
3597                         // route private messages which are targetted at clients only to the server
3598                         // which needs to receive them
3599                         userrec* d = (userrec*)dest;
3600                         if ((d->fd < 0) && (user->fd > -1))
3601                         {
3602                                 std::deque<std::string> params;
3603                                 params.clear();
3604                                 params.push_back(d->nick);
3605                                 params.push_back(":"+text);
3606                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
3607                         }
3608                 }
3609                 else if (target_type == TYPE_CHANNEL)
3610                 {
3611                         if (user->fd > -1)
3612                         {
3613                                 chanrec *c = (chanrec*)dest;
3614                                 std::string cname = c->name;
3615                                 if (status)
3616                                         cname = status + cname;
3617                                 std::deque<TreeServer*> list;
3618                                 GetListOfServersForChannel(c,list);
3619                                 unsigned int ucount = list.size();
3620                                 for (unsigned int i = 0; i < ucount; i++)
3621                                 {
3622                                         TreeSocket* Sock = list[i]->GetSocket();
3623                                         if (Sock)
3624                                                 Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
3625                                 }
3626                         }
3627                 }
3628                 else if (target_type == TYPE_SERVER)
3629                 {
3630                         if (user->fd > -1)
3631                         {
3632                                 char* target = (char*)dest;
3633                                 std::deque<std::string> par;
3634                                 par.push_back(target);
3635                                 par.push_back(":"+text);
3636                                 DoOneToMany(user->nick,"PRIVMSG",par);
3637                         }
3638                 }
3639         }
3640
3641         virtual void OnBackgroundTimer(time_t curtime)
3642         {
3643                 AutoConnectServers(curtime);
3644                 DoPingChecks(curtime);
3645         }
3646
3647         virtual void OnUserJoin(userrec* user, chanrec* channel)
3648         {
3649                 // Only do this for local users
3650                 if (user->fd > -1)
3651                 {
3652                         std::deque<std::string> params;
3653                         params.clear();
3654                         params.push_back(channel->name);
3655
3656                         if (channel->GetUserCounter() > 1)
3657                         {
3658                                 // not the first in the channel
3659                                 DoOneToMany(user->nick,"JOIN",params);
3660                         }
3661                         else
3662                         {
3663                                 // first in the channel, set up their permissions
3664                                 // and the channel TS with FJOIN.
3665                                 char ts[24];
3666                                 snprintf(ts,24,"%lu",(unsigned long)channel->age);
3667                                 params.clear();
3668                                 params.push_back(channel->name);
3669                                 params.push_back(ts);
3670                                 params.push_back("@"+std::string(user->nick));
3671                                 DoOneToMany(Srv->GetServerName(),"FJOIN",params);
3672                         }
3673                 }
3674         }
3675
3676         virtual void OnChangeHost(userrec* user, const std::string &newhost)
3677         {
3678                 // only occurs for local clients
3679                 if (user->registered != 7)
3680                         return;
3681                 std::deque<std::string> params;
3682                 params.push_back(newhost);
3683                 DoOneToMany(user->nick,"FHOST",params);
3684         }
3685
3686         virtual void OnChangeName(userrec* user, const std::string &gecos)
3687         {
3688                 // only occurs for local clients
3689                 if (user->registered != 7)
3690                         return;
3691                 std::deque<std::string> params;
3692                 params.push_back(gecos);
3693                 DoOneToMany(user->nick,"FNAME",params);
3694         }
3695
3696         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
3697         {
3698                 if (user->fd > -1)
3699                 {
3700                         std::deque<std::string> params;
3701                         params.push_back(channel->name);
3702                         if (partmessage != "")
3703                                 params.push_back(":"+partmessage);
3704                         DoOneToMany(user->nick,"PART",params);
3705                 }
3706         }
3707
3708         virtual void OnUserConnect(userrec* user)
3709         {
3710                 char agestr[MAXBUF];
3711                 if (user->fd > -1)
3712                 {
3713                         std::deque<std::string> params;
3714                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
3715                         params.push_back(agestr);
3716                         params.push_back(user->nick);
3717                         params.push_back(user->host);
3718                         params.push_back(user->dhost);
3719                         params.push_back(user->ident);
3720                         params.push_back("+"+std::string(user->FormatModes()));
3721                         params.push_back((char*)inet_ntoa(user->ip4));
3722                         params.push_back(":"+std::string(user->fullname));
3723                         DoOneToMany(Srv->GetServerName(),"NICK",params);
3724
3725                         // User is Local, change needs to be reflected!
3726                         TreeServer* SourceServer = FindServer(user->server);
3727                         if (SourceServer)
3728                         {
3729                                 SourceServer->AddUserCount();
3730                         }
3731
3732                 }
3733         }
3734
3735         virtual void OnUserQuit(userrec* user, const std::string &reason)
3736         {
3737                 if ((user->fd > -1) && (user->registered == 7))
3738                 {
3739                         std::deque<std::string> params;
3740                         params.push_back(":"+reason);
3741                         DoOneToMany(user->nick,"QUIT",params);
3742                 }
3743                 // Regardless, We need to modify the user Counts..
3744                 TreeServer* SourceServer = FindServer(user->server);
3745                 if (SourceServer)
3746                 {
3747                         SourceServer->DelUserCount();
3748                 }
3749
3750         }
3751
3752         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
3753         {
3754                 if (user->fd > -1)
3755                 {
3756                         std::deque<std::string> params;
3757                         params.push_back(user->nick);
3758                         DoOneToMany(oldnick,"NICK",params);
3759                 }
3760         }
3761
3762         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
3763         {
3764                 if ((source) && (source->fd > -1))
3765                 {
3766                         std::deque<std::string> params;
3767                         params.push_back(chan->name);
3768                         params.push_back(user->nick);
3769                         params.push_back(":"+reason);
3770                         DoOneToMany(source->nick,"KICK",params);
3771                 }
3772                 else if (!source)
3773                 {
3774                         std::deque<std::string> params;
3775                         params.push_back(chan->name);
3776                         params.push_back(user->nick);
3777                         params.push_back(":"+reason);
3778                         DoOneToMany(Srv->GetServerName(),"KICK",params);
3779                 }
3780         }
3781
3782         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
3783         {
3784                 std::deque<std::string> params;
3785                 params.push_back(dest->nick);
3786                 params.push_back(":"+reason);
3787                 DoOneToMany(source->nick,"KILL",params);
3788         }
3789
3790         virtual void OnRehash(const std::string &parameter)
3791         {
3792                 if (parameter != "")
3793                 {
3794                         std::deque<std::string> params;
3795                         params.push_back(parameter);
3796                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
3797                         // check for self
3798                         if (Srv->MatchText(Srv->GetServerName(),parameter))
3799                         {
3800                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
3801                                 Srv->RehashServer();
3802                         }
3803                 }
3804                 ReadConfiguration(false);
3805         }
3806
3807         // note: the protocol does not allow direct umode +o except
3808         // via NICK with 8 params. sending OPERTYPE infers +o modechange
3809         // locally.
3810         virtual void OnOper(userrec* user, const std::string &opertype)
3811         {
3812                 if (user->fd > -1)
3813                 {
3814                         std::deque<std::string> params;
3815                         params.push_back(opertype);
3816                         DoOneToMany(user->nick,"OPERTYPE",params);
3817                 }
3818         }
3819
3820         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
3821         {
3822                 if (source->fd > -1)
3823                 {
3824                         char type[8];
3825                         snprintf(type,8,"%cLINE",linetype);
3826                         std::string stype = type;
3827                         if (adding)
3828                         {
3829                                 char sduration[MAXBUF];
3830                                 snprintf(sduration,MAXBUF,"%ld",duration);
3831                                 std::deque<std::string> params;
3832                                 params.push_back(host);
3833                                 params.push_back(sduration);
3834                                 params.push_back(":"+reason);
3835                                 DoOneToMany(source->nick,stype,params);
3836                         }
3837                         else
3838                         {
3839                                 std::deque<std::string> params;
3840                                 params.push_back(host);
3841                                 DoOneToMany(source->nick,stype,params);
3842                         }
3843                 }
3844         }
3845
3846         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
3847         {
3848                 OnLine(source,hostmask,true,'G',duration,reason);
3849         }
3850
3851         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
3852         {
3853                 OnLine(source,ipmask,true,'Z',duration,reason);
3854         }
3855
3856         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
3857         {
3858                 OnLine(source,nickmask,true,'Q',duration,reason);
3859         }
3860
3861         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
3862         {
3863                 OnLine(source,hostmask,true,'E',duration,reason);
3864         }
3865
3866         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
3867         {
3868                 OnLine(source,hostmask,false,'G',0,"");
3869         }
3870
3871         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
3872         {
3873                 OnLine(source,ipmask,false,'Z',0,"");
3874         }
3875
3876         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
3877         {
3878                 OnLine(source,nickmask,false,'Q',0,"");
3879         }
3880
3881         virtual void OnDelELine(userrec* source, const std::string &hostmask)
3882         {
3883                 OnLine(source,hostmask,false,'E',0,"");
3884         }
3885
3886         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
3887         {
3888                 if ((user->fd > -1) && (user->registered == 7))
3889                 {
3890                         if (target_type == TYPE_USER)
3891                         {
3892                                 userrec* u = (userrec*)dest;
3893                                 std::deque<std::string> params;
3894                                 params.push_back(u->nick);
3895                                 params.push_back(text);
3896                                 DoOneToMany(user->nick,"MODE",params);
3897                         }
3898                         else
3899                         {
3900                                 chanrec* c = (chanrec*)dest;
3901                                 std::deque<std::string> params;
3902                                 params.push_back(c->name);
3903                                 params.push_back(text);
3904                                 DoOneToMany(user->nick,"MODE",params);
3905                         }
3906                 }
3907         }
3908
3909         virtual void OnSetAway(userrec* user)
3910         {
3911                 if (IS_LOCAL(user))
3912                 {
3913                         std::deque<std::string> params;
3914                         params.push_back(":"+std::string(user->awaymsg));
3915                         DoOneToMany(user->nick,"AWAY",params);
3916                 }
3917         }
3918
3919         virtual void OnCancelAway(userrec* user)
3920         {
3921                 if (IS_LOCAL(user))
3922                 {
3923                         std::deque<std::string> params;
3924                         params.clear();
3925                         DoOneToMany(user->nick,"AWAY",params);
3926                 }
3927         }
3928
3929         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
3930         {
3931                 TreeSocket* s = (TreeSocket*)opaque;
3932                 if (target)
3933                 {
3934                         if (target_type == TYPE_USER)
3935                         {
3936                                 userrec* u = (userrec*)target;
3937                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
3938                         }
3939                         else
3940                         {
3941                                 chanrec* c = (chanrec*)target;
3942                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
3943                         }
3944                 }
3945         }
3946
3947         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
3948         {
3949                 TreeSocket* s = (TreeSocket*)opaque;
3950                 if (target)
3951                 {
3952                         if (target_type == TYPE_USER)
3953                         {
3954                                 userrec* u = (userrec*)target;
3955                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA "+u->nick+" "+extname+" :"+extdata);
3956                         }
3957                         else if (target_type == TYPE_OTHER)
3958                         {
3959                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA * "+extname+" :"+extdata);
3960                         }
3961                         else if (target_type == TYPE_CHANNEL)
3962                         {
3963                                 chanrec* c = (chanrec*)target;
3964                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA "+c->name+" "+extname+" :"+extdata);
3965                         }
3966                 }
3967         }
3968
3969         virtual void OnEvent(Event* event)
3970         {
3971                 if (event->GetEventID() == "send_metadata")
3972                 {
3973                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
3974                         if (params->size() < 3)
3975                                 return;
3976                         (*params)[2] = ":" + (*params)[2];
3977                         DoOneToMany(Srv->GetServerName(),"METADATA",*params);
3978                 }
3979                 else if (event->GetEventID() == "send_mode")
3980                 {
3981                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
3982                         if (params->size() < 2)
3983                                 return;
3984                         // Insert the TS value of the object, either userrec or chanrec
3985                         classbase* a = reinterpret_cast<classbase*>(Srv->FindNick((*params)[0]));
3986                         if (!a)
3987                         {
3988                                 a = reinterpret_cast<classbase*>(Srv->FindChannel((*params)[0]));
3989                         }
3990                         params->insert(params->begin() + 1,ConvToStr(a->age));
3991                         DoOneToMany(Srv->GetServerName(),"FMODE",*params);
3992                 }
3993         }
3994
3995         virtual ~ModuleSpanningTree()
3996         {
3997         }
3998
3999         virtual Version GetVersion()
4000         {
4001                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
4002         }
4003
4004         void Implements(char* List)
4005         {
4006                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
4007                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
4008                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
4009                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
4010                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
4011                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
4012                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = 1;
4013         }
4014
4015         /* It is IMPORTANT that m_spanningtree is the last module in the chain
4016          * so that any activity it sees is FINAL, e.g. we arent going to send out
4017          * a NICK message before m_cloaking has finished putting the +x on the user,
4018          * etc etc.
4019          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
4020          * the module call queue.
4021          */
4022         Priority Prioritize()
4023         {
4024                 return PRIORITY_LAST;
4025         }
4026 };
4027
4028
4029 class ModuleSpanningTreeFactory : public ModuleFactory
4030 {
4031  public:
4032         ModuleSpanningTreeFactory()
4033         {
4034         }
4035
4036         ~ModuleSpanningTreeFactory()
4037         {
4038         }
4039
4040         virtual Module * CreateModule(Server* Me)
4041         {
4042                 TreeProtocolModule = new ModuleSpanningTree(Me);
4043                 return TreeProtocolModule;
4044         }
4045
4046 };
4047
4048
4049 extern "C" void * init_module( void )
4050 {
4051         return new ModuleSpanningTreeFactory;
4052 }