src/modules/m_spanningtree.cpp

   1 /*   +------------------------------------+
   2  *   | Inspire Internet Relay Chat Daemon |
   3  *   +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                     E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* $ModDesc: Povides a spanning tree server link protocol */
  18
  19 using namespace std;
  20
  21 #include <stdio.h>
  22 #include <vector>
  23 #include <deque>
  24 #include "globals.h"
  25 #include "inspircd_config.h"
  26 #include "hash_map.h"
  27 #include "configreader.h"
  28 #include "users.h"
  29 #include "channels.h"
  30 #include "modules.h"
  31 #include "commands.h"
  32 #include "commands/cmd_whois.h"
  33 #include "socket.h"
  34 #include "helperfuncs.h"
  35 #include "inspircd.h"
  36 #include "inspstring.h"
  37 #include "hashcomp.h"
  38 #include "message.h"
  39 #include "xline.h"
  40 #include "typedefs.h"
  41 #include "cull_list.h"
  42 #include "aes.h"
  43
  44 #ifdef GCC3
  45 #define nspace __gnu_cxx
  46 #else
  47 #define nspace std
  48 #endif
  49
  50 /*
  51  * The server list in InspIRCd is maintained as two structures
  52  * which hold the data in different ways. Most of the time, we
  53  * want to very quicky obtain three pieces of information:
  54  *
  55  * (1) The information on a server
  56  * (2) The information on the server we must send data through
  57  *     to actually REACH the server we're after
  58  * (3) Potentially, the child/parent objects of this server
  59  *
  60  * The InspIRCd spanning protocol provides easy access to these
  61  * by storing the data firstly in a recursive structure, where
  62  * each item references its parent item, and a dynamic list
  63  * of child items, and another structure which stores the items
  64  * hashed, linearly. This means that if we want to find a server
  65  * by name quickly, we can look it up in the hash, avoiding
  66  * any O(n) lookups. If however, during a split or sync, we want
  67  * to apply an operation to a server, and any of its child objects
  68  * we can resort to recursion to walk the tree structure.
  69  */
  70
  71 class ModuleSpanningTree;
  72 static ModuleSpanningTree* TreeProtocolModule;
  73
  74 extern ServerConfig* Config;
  75 extern InspIRCd* ServerInstance;
  76 extern std::vector<Module*> modules;
  77 extern std::vector<ircd_module*> factory;
  78 extern int MODCOUNT;
  79
  80 /* Any socket can have one of five states at any one time.
  81  * The LISTENER state indicates a socket which is listening
  82  * for connections. It cannot receive data itself, only incoming
  83  * sockets.
  84  * The CONNECTING state indicates an outbound socket which is
  85  * waiting to be writeable.
  86  * The WAIT_AUTH_1 state indicates the socket is outbound and
  87  * has successfully connected, but has not yet sent and received
  88  * SERVER strings.
  89  * The WAIT_AUTH_2 state indicates that the socket is inbound
  90  * (allocated by a LISTENER) but has not yet sent and received
  91  * SERVER strings.
  92  * The CONNECTED state represents a fully authorized, fully
  93  * connected server.
  94  */
  95 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  96
  97 /* We need to import these from the core for use in netbursts */
  98 extern user_hash clientlist;
  99 extern chan_hash chanlist;
 100
 101 /* Foward declarations */
 102 class TreeServer;
 103 class TreeSocket;
 104
 105 /* This variable represents the root of the server tree
 106  * (for all intents and purposes, it's us)
 107  */
 108 TreeServer *TreeRoot;
 109
 110 static Server* Srv;
 111
 112 /* This hash_map holds the hash equivalent of the server
 113  * tree, used for rapid linear lookups.
 114  */
 115 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
 116 server_hash serverlist;
 117
 118 /* More forward declarations */
 119 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 120 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 121 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 122 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 123 void ReadConfiguration(bool rebind);
 124
 125 /* Flatten links and /MAP for non-opers */
 126 bool FlatLinks;
 127 /* Hide U-Lined servers in /MAP and /LINKS */
 128 bool HideULines;
 129
 130 /* Imported from xline.cpp for use during netburst */
 131 extern std::vector<KLine> klines;
 132 extern std::vector<GLine> glines;
 133 extern std::vector<ZLine> zlines;
 134 extern std::vector<QLine> qlines;
 135 extern std::vector<ELine> elines;
 136 extern std::vector<KLine> pklines;
 137 extern std::vector<GLine> pglines;
 138 extern std::vector<ZLine> pzlines;
 139 extern std::vector<QLine> pqlines;
 140 extern std::vector<ELine> pelines;
 141
 142 /* Each server in the tree is represented by one class of
 143  * type TreeServer. A locally connected TreeServer can
 144  * have a class of type TreeSocket associated with it, for
 145  * remote servers, the TreeSocket entry will be NULL.
 146  * Each server also maintains a pointer to its parent
 147  * (NULL if this server is ours, at the top of the tree)
 148  * and a pointer to its "Route" (see the comments in the
 149  * constructors below), and also a dynamic list of pointers
 150  * to its children which can be iterated recursively
 151  * if required. Creating or deleting objects of type
 152  i* TreeServer automatically maintains the hash_map of
 153  * TreeServer items, deleting and inserting them as they
 154  * are created and destroyed.
 155  */
 156
 157 class TreeServer
 158 {
 159         TreeServer* Parent;                     /* Parent entry */
 160         TreeServer* Route;                      /* Route entry */
 161         std::vector<TreeServer*> Children;      /* List of child objects */
 162         irc::string ServerName;                 /* Server's name */
 163         std::string ServerDesc;                 /* Server's description */
 164         std::string VersionString;              /* Version string or empty string */
 165         int UserCount;                          /* Not used in this version */
 166         int OperCount;                          /* Not used in this version */
 167         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 168         time_t NextPing;                        /* After this time, the server should be PINGed*/
 169         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 170         std::map<userrec*,userrec*> Users;      /* Users on this server */
 171         bool DontModifyHash;                    /* When the server is splitting, this is set to true so we dont bash our own iterator to death */
 172
 173  public:
 174
 175         /* We don't use this constructor. Its a dummy, and won't cause any insertion
 176          * of the TreeServer into the hash_map. See below for the two we DO use.
 177          */
 178         TreeServer()
 179         {
 180                 Parent = NULL;
 181                 ServerName = "";
 182                 ServerDesc = "";
 183                 VersionString = "";
 184                 UserCount = OperCount = 0;
 185                 VersionString = Srv->GetVersion();
 186                 DontModifyHash = false;
 187         }
 188
 189         /* We use this constructor only to create the 'root' item, TreeRoot, which
 190          * represents our own server. Therefore, it has no route, no parent, and
 191          * no socket associated with it. Its version string is our own local version.
 192          */
 193         TreeServer(std::string Name, std::string Desc) : ServerName(Name.c_str()), ServerDesc(Desc)
 194         {
 195                 Parent = NULL;
 196                 VersionString = "";
 197                 UserCount = OperCount = 0;
 198                 VersionString = Srv->GetVersion();
 199                 Route = NULL;
 200                 Socket = NULL; /* Fix by brain */
 201                 DontModifyHash = false;
 202                 AddHashEntry();
 203         }
 204
 205         /* When we create a new server, we call this constructor to initialize it.
 206          * This constructor initializes the server's Route and Parent, and sets up
 207          * its ping counters so that it will be pinged one minute from now.
 208          */
 209         TreeServer(std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) : Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 210         {
 211                 VersionString = "";
 212                 UserCount = OperCount = 0;
 213                 DontModifyHash = false;
 214                 this->SetNextPingTime(time(NULL) + 120);
 215                 this->SetPingFlag();
 216
 217                 /* find the 'route' for this server (e.g. the one directly connected
 218                  * to the local server, which we can use to reach it)
 219                  *
 220                  * In the following example, consider we have just added a TreeServer
 221                  * class for server G on our network, of which we are server A.
 222                  * To route traffic to G (marked with a *) we must send the data to
 223                  * B (marked with a +) so this algorithm initializes the 'Route'
 224                  * value to point at whichever server traffic must be routed through
 225                  * to get here. If we were to try this algorithm with server B,
 226                  * the Route pointer would point at its own object ('this').
 227                  *
 228                  *              A
 229                  *             / \
 230                  *          + B   C
 231                  *           / \   \
 232                  *          D   E   F
 233                  *         /         \
 234                  *      * G           H
 235                  *
 236                  * We only run this algorithm when a server is created, as
 237                  * the routes remain constant while ever the server exists, and
 238                  * do not need to be re-calculated.
 239                  */
 240
 241                 Route = Above;
 242                 if (Route == TreeRoot)
 243                 {
 244                         Route = this;
 245                 }
 246                 else
 247                 {
 248                         while (this->Route->GetParent() != TreeRoot)
 249                         {
 250                                 this->Route = Route->GetParent();
 251                         }
 252                 }
 253
 254                 /* Because recursive code is slow and takes a lot of resources,
 255                  * we store two representations of the server tree. The first
 256                  * is a recursive structure where each server references its
 257                  * children and its parent, which is used for netbursts and
 258                  * netsplits to dump the whole dataset to the other server,
 259                  * and the second is used for very fast lookups when routing
 260                  * messages and is instead a hash_map, where each item can
 261                  * be referenced by its server name. The AddHashEntry()
 262                  * call below automatically inserts each TreeServer class
 263                  * into the hash_map as it is created. There is a similar
 264                  * maintainance call in the destructor to tidy up deleted
 265                  * servers.
 266                  */
 267
 268                 this->AddHashEntry();
 269         }
 270
 271         void AddUser(userrec* user)
 272         {
 273                 if (this->DontModifyHash)
 274                 {
 275                         log(DEBUG,"Not modifying hash");
 276                         return;
 277                 }
 278
 279                 log(DEBUG,"Add user %s to server %s",user->nick,this->ServerName.c_str());
 280                 std::map<userrec*,userrec*>::iterator iter;
 281                 iter = Users.find(user);
 282                 if (iter == Users.end())
 283                         Users[user] = user;
 284         }
 285
 286         void DelUser(userrec* user)
 287         {
 288                 /* FIX BY BRAIN:
 289                  * Quitting the user in QuitUsers changes the hash by removing the user here,
 290                  * corrupting the iterator!
 291                  * When netsplitting, this->DontModifyHash is set to prevent it now!
 292                  */
 293                 if (this->DontModifyHash)
 294                 {
 295                         log(DEBUG,"Not modifying hash");
 296                         return;
 297                 }
 298
 299                 log(DEBUG,"Remove user %s from server %s",user->nick,this->ServerName.c_str());
 300                 std::map<userrec*,userrec*>::iterator iter;
 301                 iter = Users.find(user);
 302                 if (iter != Users.end())
 303                         Users.erase(iter);
 304         }
 305
 306         int QuitUsers(const std::string &reason)
 307         {
 308                 int x = Users.size();
 309                 log(DEBUG,"Removing %d users from server %s",x,this->ServerName.c_str());
 310                 const char* reason_s = reason.c_str();
 311                 this->DontModifyHash = true;
 312                 for (std::map<userrec*,userrec*>::iterator n = Users.begin(); n != Users.end(); n++)
 313                 {
 314                         log(DEBUG,"Kill %s fd=%d",n->second->nick,n->second->fd);
 315                         if (!IS_LOCAL(n->second))
 316                                 kill_link(n->second,reason_s);
 317                 }
 318                 Users.clear();
 319                 this->DontModifyHash = false;
 320                 return x;
 321         }
 322
 323         /* This method is used to add the structure to the
 324          * hash_map for linear searches. It is only called
 325          * by the constructors.
 326          */
 327         void AddHashEntry()
 328         {
 329                 server_hash::iterator iter;
 330                 iter = serverlist.find(this->ServerName.c_str());
 331                 if (iter == serverlist.end())
 332                         serverlist[this->ServerName.c_str()] = this;
 333         }
 334
 335         /* This method removes the reference to this object
 336          * from the hash_map which is used for linear searches.
 337          * It is only called by the default destructor.
 338          */
 339         void DelHashEntry()
 340         {
 341                 server_hash::iterator iter;
 342                 iter = serverlist.find(this->ServerName.c_str());
 343                 if (iter != serverlist.end())
 344                         serverlist.erase(iter);
 345         }
 346
 347         /* These accessors etc should be pretty self-
 348          * explanitory.
 349          */
 350
 351         TreeServer* GetRoute()
 352         {
 353                 return Route;
 354         }
 355
 356         std::string GetName()
 357         {
 358                 return ServerName.c_str();
 359         }
 360
 361         std::string GetDesc()
 362         {
 363                 return ServerDesc;
 364         }
 365
 366         std::string GetVersion()
 367         {
 368                 return VersionString;
 369         }
 370
 371         void SetNextPingTime(time_t t)
 372         {
 373                 this->NextPing = t;
 374                 LastPingWasGood = false;
 375         }
 376
 377         time_t NextPingTime()
 378         {
 379                 return NextPing;
 380         }
 381
 382         bool AnsweredLastPing()
 383         {
 384                 return LastPingWasGood;
 385         }
 386
 387         void SetPingFlag()
 388         {
 389                 LastPingWasGood = true;
 390         }
 391
 392         int GetUserCount()
 393         {
 394                 return UserCount;
 395         }
 396
 397         void AddUserCount()
 398         {
 399                 UserCount++;
 400         }
 401
 402         void DelUserCount()
 403         {
 404                 UserCount--;
 405         }
 406
 407         int GetOperCount()
 408         {
 409                 return OperCount;
 410         }
 411
 412         TreeSocket* GetSocket()
 413         {
 414                 return Socket;
 415         }
 416
 417         TreeServer* GetParent()
 418         {
 419                 return Parent;
 420         }
 421
 422         void SetVersion(std::string Version)
 423         {
 424                 VersionString = Version;
 425         }
 426
 427         unsigned int ChildCount()
 428         {
 429                 return Children.size();
 430         }
 431
 432         TreeServer* GetChild(unsigned int n)
 433         {
 434                 if (n < Children.size())
 435                 {
 436                         /* Make sure they  cant request
 437                          * an out-of-range object. After
 438                          * all we know what these programmer
 439                          * types are like *grin*.
 440                          */
 441                         return Children[n];
 442                 }
 443                 else
 444                 {
 445                         return NULL;
 446                 }
 447         }
 448
 449         void AddChild(TreeServer* Child)
 450         {
 451                 Children.push_back(Child);
 452         }
 453
 454         bool DelChild(TreeServer* Child)
 455         {
 456                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 457                 {
 458                         if (*a == Child)
 459                         {
 460                                 Children.erase(a);
 461                                 return true;
 462                         }
 463                 }
 464                 return false;
 465         }
 466
 467         /* Removes child nodes of this node, and of that node, etc etc.
 468          * This is used during netsplits to automatically tidy up the
 469          * server tree. It is slow, we don't use it for much else.
 470          */
 471         bool Tidy()
 472         {
 473                 bool stillchildren = true;
 474                 while (stillchildren)
 475                 {
 476                         stillchildren = false;
 477                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 478                         {
 479                                 TreeServer* s = (TreeServer*)*a;
 480                                 s->Tidy();
 481                                 Children.erase(a);
 482                                 DELETE(s);
 483                                 stillchildren = true;
 484                                 break;
 485                         }
 486                 }
 487                 return true;
 488         }
 489
 490         ~TreeServer()
 491         {
 492                 /* We'd better tidy up after ourselves, eh? */
 493                 this->DelHashEntry();
 494         }
 495 };
 496
 497 /* The Link class might as well be a struct,
 498  * but this is C++ and we don't believe in structs (!).
 499  * It holds the entire information of one <link>
 500  * tag from the main config file. We maintain a list
 501  * of them, and populate the list on rehash/load.
 502  */
 503
 504 class Link
 505 {
 506  public:
 507          irc::string Name;
 508          std::string IPAddr;
 509          int Port;
 510          std::string SendPass;
 511          std::string RecvPass;
 512          unsigned long AutoConnect;
 513          time_t NextConnectTime;
 514          std::string EncryptionKey;
 515          bool HiddenFromStats;
 516 };
 517
 518 /* The usual stuff for inspircd modules,
 519  * plus the vector of Link classes which we
 520  * use to store the <link> tags from the config
 521  * file.
 522  */
 523 ConfigReader *Conf;
 524 std::vector<Link> LinkBlocks;
 525
 526 /* Yay for fast searches!
 527  * This is hundreds of times faster than recursion
 528  * or even scanning a linked list, especially when
 529  * there are more than a few servers to deal with.
 530  * (read as: lots).
 531  */
 532 TreeServer* FindServer(std::string ServerName)
 533 {
 534         server_hash::iterator iter;
 535         iter = serverlist.find(ServerName.c_str());
 536         if (iter != serverlist.end())
 537         {
 538                 return iter->second;
 539         }
 540         else
 541         {
 542                 return NULL;
 543         }
 544 }
 545
 546 /* Returns the locally connected server we must route a
 547  * message through to reach server 'ServerName'. This
 548  * only applies to one-to-one and not one-to-many routing.
 549  * See the comments for the constructor of TreeServer
 550  * for more details.
 551  */
 552 TreeServer* BestRouteTo(std::string ServerName)
 553 {
 554         if (ServerName.c_str() == TreeRoot->GetName())
 555                 return NULL;
 556         TreeServer* Found = FindServer(ServerName);
 557         if (Found)
 558         {
 559                 return Found->GetRoute();
 560         }
 561         else
 562         {
 563                 return NULL;
 564         }
 565 }
 566
 567 /* Find the first server matching a given glob mask.
 568  * Theres no find-using-glob method of hash_map [awwww :-(]
 569  * so instead, we iterate over the list using an iterator
 570  * and match each one until we get a hit. Yes its slow,
 571  * deal with it.
 572  */
 573 TreeServer* FindServerMask(std::string ServerName)
 574 {
 575         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 576         {
 577                 if (Srv->MatchText(i->first.c_str(),ServerName))
 578                         return i->second;
 579         }
 580         return NULL;
 581 }
 582
 583 /* A convenient wrapper that returns true if a server exists */
 584 bool IsServer(std::string ServerName)
 585 {
 586         return (FindServer(ServerName) != NULL);
 587 }
 588
 589
 590 class cmd_rconnect : public command_t
 591 {
 592         Module* Creator;
 593  public:
 594         cmd_rconnect (Module* Callback) : command_t("RCONNECT", 'o', 2), Creator(Callback)
 595         {
 596                 this->source = "m_spanningtree.so";
 597         }
 598
 599         void Handle (char **parameters, int pcnt, userrec *user)
 600         {
 601                 WriteServ(user->fd,"NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 602                 /* Is this aimed at our server? */
 603                 if (Srv->MatchText(Srv->GetServerName(),parameters[0]))
 604                 {
 605                         /* Yes, initiate the given connect */
 606                         WriteOpers("*** Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 607                         char* para[1];
 608                         para[0] = parameters[1];
 609                         Creator->OnPreCommand("CONNECT", para, 1, user, true);
 610                 }
 611         }
 612 };
 613
 614
 615
 616 /* Every SERVER connection inbound or outbound is represented by
 617  * an object of type TreeSocket.
 618  * TreeSockets, being inherited from InspSocket, can be tied into
 619  * the core socket engine, and we cn therefore receive activity events
 620  * for them, just like activex objects on speed. (yes really, that
 621  * is a technical term!) Each of these which relates to a locally
 622  * connected server is assocated with it, by hooking it onto a
 623  * TreeSocket class using its constructor. In this way, we can
 624  * maintain a list of servers, some of which are directly connected,
 625  * some of which are not.
 626  */
 627
 628 class TreeSocket : public InspSocket
 629 {
 630         std::string myhost;
 631         std::string in_buffer;
 632         ServerState LinkState;
 633         std::string InboundServerName;
 634         std::string InboundDescription;
 635         int num_lost_users;
 636         int num_lost_servers;
 637         time_t NextPing;
 638         bool LastPingWasGood;
 639         bool bursting;
 640         AES* ctx_in;
 641         AES* ctx_out;
 642         unsigned int keylength;
 643
 644  public:
 645
 646         /* Because most of the I/O gubbins are encapsulated within
 647          * InspSocket, we just call the superclass constructor for
 648          * most of the action, and append a few of our own values
 649          * to it.
 650          */
 651         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 652                 : InspSocket(host, port, listening, maxtime)
 653         {
 654                 myhost = host;
 655                 this->LinkState = LISTENER;
 656                 this->ctx_in = NULL;
 657                 this->ctx_out = NULL;
 658         }
 659
 660         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 661                 : InspSocket(host, port, listening, maxtime)
 662         {
 663                 myhost = ServerName;
 664                 this->LinkState = CONNECTING;
 665                 this->ctx_in = NULL;
 666                 this->ctx_out = NULL;
 667         }
 668
 669         /* When a listening socket gives us a new file descriptor,
 670          * we must associate it with a socket without creating a new
 671          * connection. This constructor is used for this purpose.
 672          */
 673         TreeSocket(int newfd, char* ip)
 674                 : InspSocket(newfd, ip)
 675         {
 676                 this->LinkState = WAIT_AUTH_1;
 677                 this->ctx_in = NULL;
 678                 this->ctx_out = NULL;
 679                 this->SendCapabilities();
 680         }
 681
 682         ~TreeSocket()
 683         {
 684                 if (ctx_in)
 685                         DELETE(ctx_in);
 686                 if (ctx_out)
 687                         DELETE(ctx_out);
 688         }
 689
 690         void InitAES(std::string key,std::string SName)
 691         {
 692                 if (key == "")
 693                         return;
 694
 695                 ctx_in = new AES();
 696                 ctx_out = new AES();
 697                 log(DEBUG,"Initialized AES key %s",key.c_str());
 698                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 699                 keylength = key.length();
 700                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 701                 {
 702                         WriteOpers("*** \2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 703                         log(DEBUG,"Key length not 16, 24 or 32 characters!");
 704                 }
 705                 else
 706                 {
 707                         WriteOpers("*** \2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 708                         ctx_in->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 709                                 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 710                         ctx_out->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 711                                 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 712                 }
 713         }
 714
 715         /* When an outbound connection finishes connecting, we receive
 716          * this event, and must send our SERVER string to the other
 717          * side. If the other side is happy, as outlined in the server
 718          * to server docs on the inspircd.org site, the other side
 719          * will then send back its own server string.
 720          */
 721         virtual bool OnConnected()
 722         {
 723                 if (this->LinkState == CONNECTING)
 724                 {
 725                         /* we do not need to change state here. */
 726                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 727                         {
 728                                 if (x->Name == this->myhost)
 729                                 {
 730                                         Srv->SendOpers("*** Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] established.");
 731                                         this->SendCapabilities();
 732                                         if (x->EncryptionKey != "")
 733                                         {
 734                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 735                                                 {
 736                                                         WriteOpers("\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 737                                                 }
 738                                                 else
 739                                                 {
 740                                                         this->WriteLine("AES "+Srv->GetServerName());
 741                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 742                                                 }
 743                                         }
 744                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 745                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 746                                         return true;
 747                                 }
 748                         }
 749                 }
 750                 /* There is a (remote) chance that between the /CONNECT and the connection
 751                  * being accepted, some muppet has removed the <link> block and rehashed.
 752                  * If that happens the connection hangs here until it's closed. Unlikely
 753                  * and rather harmless.
 754                  */
 755                 Srv->SendOpers("*** Connection to \2"+myhost+"\2 lost link tag(!)");
 756                 return true;
 757         }
 758
 759         virtual void OnError(InspSocketError e)
 760         {
 761                 /* We don't handle this method, because all our
 762                  * dirty work is done in OnClose() (see below)
 763                  * which is still called on error conditions too.
 764                  */
 765                 if (e == I_ERR_CONNECT)
 766                 {
 767                         Srv->SendOpers("*** Connection failed: Connection refused");
 768                 }
 769         }
 770
 771         virtual int OnDisconnect()
 772         {
 773                 /* For the same reason as above, we don't
 774                  * handle OnDisconnect()
 775                  */
 776                 return true;
 777         }
 778
 779         /* Recursively send the server tree with distances as hops.
 780          * This is used during network burst to inform the other server
 781          * (and any of ITS servers too) of what servers we know about.
 782          * If at any point any of these servers already exist on the other
 783          * end, our connection may be terminated. The hopcounts given
 784          * by this function are relative, this doesn't matter so long as
 785          * they are all >1, as all the remote servers re-calculate them
 786          * to be relative too, with themselves as hop 0.
 787          */
 788         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 789         {
 790                 char command[1024];
 791                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 792                 {
 793                         TreeServer* recursive_server = Current->GetChild(q);
 794                         if (recursive_server != s)
 795                         {
 796                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 797                                 this->WriteLine(command);
 798                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 799                                 /* down to next level */
 800                                 this->SendServers(recursive_server, s, hops+1);
 801                         }
 802                 }
 803         }
 804
 805         std::string MyCapabilities()
 806         {
 807                 ServerConfig* Config = Srv->GetConfig();
 808                 std::vector<std::string> modlist;
 809                 std::string capabilities = "";
 810
 811                 for (int i = 0; i <= MODCOUNT; i++)
 812                 {
 813                         if ((modules[i]->GetVersion().Flags & VF_STATIC) || (modules[i]->GetVersion().Flags & VF_COMMON))
 814                                 modlist.push_back(Config->module_names[i]);
 815                 }
 816                 sort(modlist.begin(),modlist.end());
 817                 for (unsigned int i = 0; i < modlist.size(); i++)
 818                 {
 819                         if (i)
 820                                 capabilities = capabilities + ",";
 821                         capabilities = capabilities + modlist[i];
 822                 }
 823                 return capabilities;
 824         }
 825
 826         void SendCapabilities()
 827         {
 828                 this->WriteLine("CAPAB "+MyCapabilities());
 829         }
 830
 831         bool Capab(std::deque<std::string> params)
 832         {
 833                 if (params.size() != 1)
 834                 {
 835                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB");
 836                         return false;
 837                 }
 838
 839                 if (params[0] != this->MyCapabilities())
 840                 {
 841                         std::string quitserver = this->myhost;
 842                         if (this->InboundServerName != "")
 843                         {
 844                                 quitserver = this->InboundServerName;
 845                         }
 846
 847                         WriteOpers("*** \2ERROR\2: Server '%s' does not have the same set of modules loaded, cannot link!",quitserver.c_str());
 848                         WriteOpers("*** Our networked module set is: '%s'",this->MyCapabilities().c_str());
 849                         WriteOpers("*** Other server's networked module set is: '%s'",params[0].c_str());
 850                         WriteOpers("*** These lists must match exactly on both servers. Please correct these errors, and try again.");
 851                         this->WriteLine("ERROR :CAPAB mismatch; My capabilities: '"+this->MyCapabilities()+"'");
 852                         return false;
 853                 }
 854
 855                 return true;
 856         }
 857
 858         /* This function forces this server to quit, removing this server
 859          * and any users on it (and servers and users below that, etc etc).
 860          * It's very slow and pretty clunky, but luckily unless your network
 861          * is having a REAL bad hair day, this function shouldnt be called
 862          * too many times a month ;-)
 863          */
 864         void SquitServer(std::string &from, TreeServer* Current)
 865         {
 866                 /* recursively squit the servers attached to 'Current'.
 867                  * We're going backwards so we don't remove users
 868                  * while we still need them ;)
 869                  */
 870                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 871                 {
 872                         TreeServer* recursive_server = Current->GetChild(q);
 873                         this->SquitServer(from,recursive_server);
 874                 }
 875                 /* Now we've whacked the kids, whack self */
 876                 num_lost_servers++;
 877                 num_lost_users += Current->QuitUsers(from);
 878                 /*for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
 879                 {
 880                         if (!strcasecmp(u->second->server,Current->GetName().c_str()))
 881                         {
 882                                 Goners->AddItem(u->second,from);
 883                                 num_lost_users++;
 884                         }
 885                 }*/
 886         }
 887
 888         /* This is a wrapper function for SquitServer above, which
 889          * does some validation first and passes on the SQUIT to all
 890          * other remaining servers.
 891          */
 892         void Squit(TreeServer* Current,std::string reason)
 893         {
 894                 if ((Current) && (Current != TreeRoot))
 895                 {
 896                         std::deque<std::string> params;
 897                         params.push_back(Current->GetName());
 898                         params.push_back(":"+reason);
 899                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 900                         if (Current->GetParent() == TreeRoot)
 901                         {
 902                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 903                         }
 904                         else
 905                         {
 906                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 907                         }
 908                         num_lost_servers = 0;
 909                         num_lost_users = 0;
 910                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
 911                         SquitServer(from, Current);
 912                         Current->Tidy();
 913                         Current->GetParent()->DelChild(Current);
 914                         DELETE(Current);
 915                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 916                 }
 917                 else
 918                 {
 919                         log(DEFAULT,"Squit from unknown server");
 920                 }
 921         }
 922
 923         /* FMODE command */
 924         bool ForceMode(std::string source, std::deque<std::string> &params)
 925         {
 926                 if (params.size() < 2)
 927                         return true;
 928                 userrec* who = new userrec();
 929                 who->fd = FD_MAGIC_NUMBER;
 930                 char* modelist[64];
 931                 memset(&modelist,0,sizeof(modelist));
 932                 for (unsigned int q = 0; q < params.size(); q++)
 933                 {
 934                         modelist[q] = (char*)params[q].c_str();
 935                 }
 936                 Srv->SendMode(modelist,params.size(),who);
 937                 DoOneToAllButSender(source,"FMODE",params,source);
 938                 DELETE(who);
 939                 return true;
 940         }
 941
 942         /* FTOPIC command */
 943         bool ForceTopic(std::string source, std::deque<std::string> &params)
 944         {
 945                 if (params.size() != 4)
 946                         return true;
 947                 time_t ts = atoi(params[1].c_str());
 948                 std::string nsource = source;
 949
 950                 chanrec* c = Srv->FindChannel(params[0]);
 951                 if (c)
 952                 {
 953                         if ((ts >= c->topicset) || (!*c->topic))
 954                         {
 955                                 std::string oldtopic = c->topic;
 956                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
 957                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
 958                                 c->topicset = ts;
 959                                 /* if the topic text is the same as the current topic,
 960                                  * dont bother to send the TOPIC command out, just silently
 961                                  * update the set time and set nick.
 962                                  */
 963                                 if (oldtopic != params[3])
 964                                 {
 965                                         userrec* user = Srv->FindNick(source);
 966                                         if (!user)
 967                                         {
 968                                                 WriteChannelWithServ(source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
 969                                         }
 970                                         else
 971                                         {
 972                                                 WriteChannel(c, user, "TOPIC %s :%s", c->name, c->topic);
 973                                                 nsource = user->server;
 974                                         }
 975                                         /* all done, send it on its way */
 976                                         params[3] = ":" + params[3];
 977                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
 978                                 }
 979                         }
 980
 981                 }
 982
 983                 return true;
 984         }
 985
 986         /* FJOIN, similar to unreal SJOIN */
 987         bool ForceJoin(std::string source, std::deque<std::string> &params)
 988         {
 989                 if (params.size() < 3)
 990                         return true;
 991
 992                 char first[MAXBUF];
 993                 char modestring[MAXBUF];
 994                 char* mode_users[127];
 995                 memset(&mode_users,0,sizeof(mode_users));
 996                 mode_users[0] = first;
 997                 mode_users[1] = modestring;
 998                 strcpy(mode_users[1],"+");
 999                 unsigned int modectr = 2;
1000
1001                 userrec* who = NULL;
1002                 std::string channel = params[0];
1003                 time_t TS = atoi(params[1].c_str());
1004                 char* key = "";
1005
1006                 chanrec* chan = Srv->FindChannel(channel);
1007                 if (chan)
1008                 {
1009                         key = chan->key;
1010                 }
1011                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1012
1013                 /* default is a high value, which if we dont have this
1014                  * channel will let the other side apply their modes.
1015                  */
1016                 time_t ourTS = time(NULL)+600;
1017                 chanrec* us = Srv->FindChannel(channel);
1018                 if (us)
1019                 {
1020                         ourTS = us->age;
1021                 }
1022
1023                 log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
1024
1025                 /* do this first, so our mode reversals are correctly received by other servers
1026                  * if there is a TS collision.
1027                  */
1028                 DoOneToAllButSender(source,"FJOIN",params,source);
1029
1030                 for (unsigned int usernum = 2; usernum < params.size(); usernum++)
1031                 {
1032                         /* process one channel at a time, applying modes. */
1033                         char* usr = const_cast<char*>(params[usernum].c_str());
1034                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1035                          * (is this even possible?) */
1036                         if (usr && *usr)
1037                         {
1038                                 char permissions = *usr;
1039                                 switch (permissions)
1040                                 {
1041                                         case '@':
1042                                                 usr++;
1043                                                 mode_users[modectr++] = usr;
1044                                                 strlcat(modestring,"o",MAXBUF);
1045                                         break;
1046                                         case '%':
1047                                                 usr++;
1048                                                 mode_users[modectr++] = usr;
1049                                                 strlcat(modestring,"h",MAXBUF);
1050                                         break;
1051                                         case '+':
1052                                                 usr++;
1053                                                 mode_users[modectr++] = usr;
1054                                                 strlcat(modestring,"v",MAXBUF);
1055                                         break;
1056                                 }
1057                                 who = Srv->FindNick(usr);
1058                                 if (who)
1059                                 {
1060                                         Srv->JoinUserToChannel(who,channel,key);
1061                                         if (modectr >= (MAXMODES-1))
1062                                         {
1063                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1064                                                  * if there are more than MAXMODES to go.
1065                                                  */
1066                                                 if ((ourTS >= TS) || (Srv->IsUlined(who->server)))
1067                                                 {
1068                                                         /* We also always let u-lined clients win, no matter what the TS value */
1069                                                         log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1070                                                         Srv->SendMode(mode_users,modectr,who);
1071                                                 }
1072                                                 else
1073                                                 {
1074                                                         log(DEBUG,"Their channel newer than ours, bouncing their modes");
1075                                                         /* bouncy bouncy! */
1076                                                         std::deque<std::string> params;
1077                                                         /* modes are now being UNSET... */
1078                                                         *mode_users[1] = '-';
1079                                                         for (unsigned int x = 0; x < modectr; x++)
1080                                                         {
1081                                                                 params.push_back(mode_users[x]);
1082                                                         }
1083                                                         // tell everyone to bounce the modes. bad modes, bad!
1084                                                         DoOneToMany(Srv->GetServerName(),"FMODE",params);
1085                                                 }
1086                                                 strcpy(mode_users[1],"+");
1087                                                 modectr = 2;
1088                                         }
1089                                 }
1090                         }
1091                 }
1092                 /* there werent enough modes built up to flush it during FJOIN,
1093                  * or, there are a number left over. flush them out.
1094                  */
1095                 if ((modectr > 2) && (who))
1096                 {
1097                         if (ourTS >= TS)
1098                         {
1099                                 log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1100                                 Srv->SendMode(mode_users,modectr,who);
1101                         }
1102                         else
1103                         {
1104                                 log(DEBUG,"Their channel newer than ours, bouncing their modes");
1105                                 std::deque<std::string> params;
1106                                 *mode_users[1] = '-';
1107                                 for (unsigned int x = 0; x < modectr; x++)
1108                                 {
1109                                         params.push_back(mode_users[x]);
1110                                 }
1111                                 DoOneToMany(Srv->GetServerName(),"FMODE",params);
1112                         }
1113                 }
1114                 return true;
1115         }
1116
1117         bool SyncChannelTS(std::string source, std::deque<std::string> &params)
1118         {
1119                 if (params.size() == 2)
1120                 {
1121                         chanrec* c = Srv->FindChannel(params[0]);
1122                         if (c)
1123                         {
1124                                 time_t theirTS = atoi(params[1].c_str());
1125                                 time_t ourTS = c->age;
1126                                 if (ourTS >= theirTS)
1127                                 {
1128                                         log(DEBUG,"Updating timestamp for %s, our timestamp was %lu and theirs is %lu",c->name,ourTS,theirTS);
1129                                         c->age = theirTS;
1130                                 }
1131                         }
1132                 }
1133                 DoOneToAllButSender(Srv->GetServerName(),"SYNCTS",params,source);
1134                 return true;
1135         }
1136
1137         /* NICK command */
1138         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1139         {
1140                 if (params.size() < 8)
1141                         return true;
1142                 if (params.size() > 8)
1143                 {
1144                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1145                         return true;
1146                 }
1147                 // NICK age nick host dhost ident +modes ip :gecos
1148                 //   0   123  4 56   7
1149                 time_t age = atoi(params[0].c_str());
1150
1151                 /* This used to have a pretty craq'y loop doing the same thing,
1152                  * now we just let the STL do the hard work (more efficiently)
1153                  */
1154                 params[5] = params[5].substr(params[5].find_first_not_of('+'));
1155
1156                 const char* tempnick = params[1].c_str();
1157                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1158
1159                 user_hash::iterator iter = clientlist.find(tempnick);
1160
1161                 if (iter != clientlist.end())
1162                 {
1163                         // nick collision
1164                         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);
1165                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Nickname collision");
1166                         return true;
1167                 }
1168
1169                 clientlist[tempnick] = new userrec();
1170                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
1171                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX-1);
1172                 strlcpy(clientlist[tempnick]->host, params[2].c_str(),63);
1173                 strlcpy(clientlist[tempnick]->dhost, params[3].c_str(),63);
1174                 clientlist[tempnick]->server = FindServerNamePtr(source.c_str());
1175                 strlcpy(clientlist[tempnick]->ident, params[4].c_str(),IDENTMAX);
1176                 strlcpy(clientlist[tempnick]->fullname, params[7].c_str(),MAXGECOS);
1177                 clientlist[tempnick]->registered = 7;
1178                 clientlist[tempnick]->signon = age;
1179
1180                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1181                 {
1182                         clientlist[tempnick]->modes[(*v)-65] = 1;
1183                 }
1184                 inet_aton(params[6].c_str(),&clientlist[tempnick]->ip4);
1185
1186                 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));
1187
1188                 params[7] = ":" + params[7];
1189                 DoOneToAllButSender(source,"NICK",params,source);
1190
1191                 // Increment the Source Servers User Count..
1192                 TreeServer* SourceServer = FindServer(source);
1193                 if (SourceServer)
1194                 {
1195                         log(DEBUG,"Found source server of %s",clientlist[tempnick]->nick);
1196                         SourceServer->AddUser(clientlist[tempnick]);
1197                         SourceServer->AddUserCount();
1198                 }
1199
1200                 return true;
1201         }
1202
1203         /* Send one or more FJOINs for a channel of users.
1204          * If the length of a single line is more than 480-NICKMAX
1205          * in length, it is split over multiple lines.
1206          */
1207         void SendFJoins(TreeServer* Current, chanrec* c)
1208         {
1209                 log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1210                 char list[MAXBUF];
1211                 std::string individual_halfops = ":"+Srv->GetServerName()+" FMODE "+c->name;
1212
1213                 size_t dlen, curlen;
1214                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
1215                 int numusers = 0;
1216                 char* ptr = list + dlen;
1217
1218                 CUList *ulist = c->GetUsers();
1219                 std::vector<userrec*> specific_halfop;
1220                 std::vector<userrec*> specific_voice;
1221
1222                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1223                 {
1224                         int x = cflags(i->second,c);
1225                         if ((x & UCMODE_HOP) && (x & UCMODE_OP))
1226                         {
1227                                 specific_halfop.push_back(i->second);
1228                         }
1229                         if (((x & UCMODE_HOP) || (x & UCMODE_OP)) && (x & UCMODE_VOICE))
1230                         {
1231                                 specific_voice.push_back(i->second);
1232                         }
1233
1234                         const char* n = "";
1235                         if (x & UCMODE_OP)
1236                         {
1237                                 n = "@";
1238                         }
1239                         else if (x & UCMODE_HOP)
1240                         {
1241                                 n = "%";
1242                         }
1243                         else if (x & UCMODE_VOICE)
1244                         {
1245                                 n = "+";
1246                         }
1247
1248                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s", n, i->second->nick);
1249
1250                         curlen += ptrlen;
1251                         ptr += ptrlen;
1252
1253                         numusers++;
1254
1255                         if (curlen > (480-NICKMAX))
1256                         {
1257                                 this->WriteLine(list);
1258                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
1259                                 ptr = list + dlen;
1260                                 ptrlen = 0;
1261                                 numusers = 0;
1262                                 for (unsigned int y = 0; y < specific_voice.size(); y++)
1263                                 {
1264                                         this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" +v "+specific_voice[y]->nick);
1265                                 }
1266                                 for (unsigned int y = 0; y < specific_halfop.size(); y++)
1267                                 {
1268                                         this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" +h "+specific_halfop[y]->nick);
1269                                 }
1270                         }
1271                 }
1272                 if (numusers)
1273                 {
1274                         this->WriteLine(list);
1275                         for (unsigned int y = 0; y < specific_voice.size(); y++)
1276                         {
1277                                 this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" +v "+specific_voice[y]->nick);
1278                         }
1279                         for (unsigned int y = 0; y < specific_halfop.size(); y++)
1280                         {
1281                                 this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" +h "+specific_halfop[y]->nick);
1282                         }
1283                 }
1284                 this->WriteLine(":"+Srv->GetServerName()+" SYNCTS "+c->name+" "+ConvToStr(c->age));
1285         }
1286
1287         /* Send G, Q, Z and E lines */
1288         void SendXLines(TreeServer* Current)
1289         {
1290                 char data[MAXBUF];
1291                 std::string n = Srv->GetServerName();
1292                 const char* sn = n.c_str();
1293                 int iterations = 0;
1294                 /* Yes, these arent too nice looking, but they get the job done */
1295                 for (std::vector<ZLine>::iterator i = zlines.begin(); i != zlines.end(); i++, iterations++)
1296                 {
1297                         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);
1298                         this->WriteLine(data);
1299                 }
1300                 for (std::vector<QLine>::iterator i = qlines.begin(); i != qlines.end(); i++, iterations++)
1301                 {
1302                         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);
1303                         this->WriteLine(data);
1304                 }
1305                 for (std::vector<GLine>::iterator i = glines.begin(); i != glines.end(); i++, iterations++)
1306                 {
1307                         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);
1308                         this->WriteLine(data);
1309                 }
1310                 for (std::vector<ELine>::iterator i = elines.begin(); i != elines.end(); i++, iterations++)
1311                 {
1312                         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);
1313                         this->WriteLine(data);
1314                 }
1315                 for (std::vector<ZLine>::iterator i = pzlines.begin(); i != pzlines.end(); i++, iterations++)
1316                 {
1317                         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);
1318                         this->WriteLine(data);
1319                 }
1320                 for (std::vector<QLine>::iterator i = pqlines.begin(); i != pqlines.end(); i++, iterations++)
1321                 {
1322                         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);
1323                         this->WriteLine(data);
1324                 }
1325                 for (std::vector<GLine>::iterator i = pglines.begin(); i != pglines.end(); i++, iterations++)
1326                 {
1327                         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);
1328                         this->WriteLine(data);
1329                 }
1330                 for (std::vector<ELine>::iterator i = pelines.begin(); i != pelines.end(); i++, iterations++)
1331                 {
1332                         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);
1333                         this->WriteLine(data);
1334                 }
1335         }
1336
1337         /* Send channel modes and topics */
1338         void SendChannelModes(TreeServer* Current)
1339         {
1340                 char data[MAXBUF];
1341                 std::deque<std::string> list;
1342                 int iterations = 0;
1343                 std::string n = Srv->GetServerName();
1344                 const char* sn = n.c_str();
1345                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++, iterations++)
1346                 {
1347                         SendFJoins(Current, c->second);
1348                         snprintf(data,MAXBUF,":%s FMODE %s +%s",sn,c->second->name,chanmodes(c->second,true));
1349                         this->WriteLine(data);
1350                         if (*c->second->topic)
1351                         {
1352                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1353                                 this->WriteLine(data);
1354                         }
1355                         for (BanList::iterator b = c->second->bans.begin(); b != c->second->bans.end(); b++)
1356                         {
1357                                 snprintf(data,MAXBUF,":%s FMODE %s +b %s",sn,c->second->name,b->data);
1358                                 this->WriteLine(data);
1359                         }
1360                         FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1361                         list.clear();
1362                         c->second->GetExtList(list);
1363                         for (unsigned int j = 0; j < list.size(); j++)
1364                         {
1365                                 FOREACH_MOD(I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1366                         }
1367                 }
1368         }
1369
1370         /* send all users and their oper state/modes */
1371         void SendUsers(TreeServer* Current)
1372         {
1373                 char data[MAXBUF];
1374                 std::deque<std::string> list;
1375                 int iterations = 0;
1376                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++, iterations++)
1377                 {
1378                         if (u->second->registered == 7)
1379                         {
1380                                 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);
1381                                 this->WriteLine(data);
1382                                 if (*u->second->oper)
1383                                 {
1384                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1385                                 }
1386                                 if (*u->second->awaymsg)
1387                                 {
1388                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1389                                 }
1390                                 FOREACH_MOD(I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1391                                 list.clear();
1392                                 u->second->GetExtList(list);
1393                                 for (unsigned int j = 0; j < list.size(); j++)
1394                                 {
1395                                         FOREACH_MOD(I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1396                                 }
1397                         }
1398                 }
1399         }
1400
1401         /* This function is called when we want to send a netburst to a local
1402          * server. There is a set order we must do this, because for example
1403          * users require their servers to exist, and channels require their
1404          * users to exist. You get the idea.
1405          */
1406         void DoBurst(TreeServer* s)
1407         {
1408                 /* The calls here to ServerInstance-> yield the processing
1409                  * back to the core so that a large burst is split into at least 6 sections
1410                  * (possibly more)
1411                  */
1412                 std::string burst = "BURST "+ConvToStr(time(NULL));
1413                 std::string endburst = "ENDBURST";
1414                 // Because by the end of the netburst, it  could be gone!
1415                 std::string name = s->GetName();
1416                 Srv->SendOpers("*** Bursting to \2"+name+"\2.");
1417                 this->WriteLine(burst);
1418                 /* send our version string */
1419                 this->WriteLine(":"+Srv->GetServerName()+" VERSION :"+Srv->GetVersion());
1420                 /* Send server tree */
1421                 this->SendServers(TreeRoot,s,1);
1422                 /* Send users and their oper status */
1423                 this->SendUsers(s);
1424                 /* Send everything else (channel modes, xlines etc) */
1425                 this->SendChannelModes(s);
1426                 this->SendXLines(s);
1427                 FOREACH_MOD(I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1428                 this->WriteLine(endburst);
1429                 Srv->SendOpers("*** Finished bursting to \2"+name+"\2.");
1430         }
1431
1432         /* This function is called when we receive data from a remote
1433          * server. We buffer the data in a std::string (it doesnt stay
1434          * there for long), reading using InspSocket::Read() which can
1435          * read up to 16 kilobytes in one operation.
1436          *
1437          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1438          * THE SOCKET OBJECT FOR US.
1439          */
1440         virtual bool OnDataReady()
1441         {
1442                 char* data = this->Read();
1443                 /* Check that the data read is a valid pointer and it has some content */
1444                 if (data && *data)
1445                 {
1446                         this->in_buffer.append(data);
1447                         /* While there is at least one new line in the buffer,
1448                          * do something useful (we hope!) with it.
1449                          */
1450                         while (in_buffer.find("\n") != std::string::npos)
1451                         {
1452                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1453                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1454                                 if (ret.find("\r") != std::string::npos)
1455                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1456                                 /* Process this one, abort if it
1457                                  * didnt return true.
1458                                  */
1459                                 if (this->ctx_in)
1460                                 {
1461                                         char out[1024];
1462                                         char result[1024];
1463                                         memset(result,0,1024);
1464                                         memset(out,0,1024);
1465                                         log(DEBUG,"Original string '%s'",ret.c_str());
1466                                         /* ERROR + CAPAB is still allowed unencryped */
1467                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1468                                         {
1469                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1470                                                 if ((nbytes > 0) && (nbytes < 1024))
1471                                                 {
1472                                                         log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1473                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1474                                                         for (int t = 0; t < nbytes; t++)
1475                                                                 if (result[t] == '\7') result[t] = 0;
1476                                                         ret = result;
1477                                                 }
1478                                         }
1479                                 }
1480                                 if (!this->ProcessLine(ret))
1481                                 {
1482                                         log(DEBUG,"ProcessLine says no!");
1483                                         return false;
1484                                 }
1485                         }
1486                         return true;
1487                 }
1488                 /* EAGAIN returns an empty but non-NULL string, so this
1489                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1490                  */
1491                 return (data && !*data);
1492         }
1493
1494         int WriteLine(std::string line)
1495         {
1496                 log(DEBUG,"OUT: %s",line.c_str());
1497                 if (this->ctx_out)
1498                 {
1499                         char result[10240];
1500                         char result64[10240];
1501                         if (this->keylength)
1502                         {
1503                                 // pad it to the key length
1504                                 int n = this->keylength - (line.length() % this->keylength);
1505                                 if (n)
1506                                 {
1507                                         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);
1508                                         line.append(n,'\7');
1509                                 }
1510                         }
1511                         unsigned int ll = line.length();
1512                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
1513                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
1514                         line = result64;
1515                         //int from64tobits(char *out, const char *in, int maxlen);
1516                 }
1517                 return this->Write(line + "\r\n");
1518         }
1519
1520         /* Handle ERROR command */
1521         bool Error(std::deque<std::string> &params)
1522         {
1523                 if (params.size() < 1)
1524                         return false;
1525                 WriteOpers("*** ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
1526                 /* we will return false to cause the socket to close. */
1527                 return false;
1528         }
1529
1530         /* Because the core won't let users or even SERVERS set +o,
1531          * we use the OPERTYPE command to do this.
1532          */
1533         bool OperType(std::string prefix, std::deque<std::string> &params)
1534         {
1535                 if (params.size() != 1)
1536                 {
1537                         log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
1538                         return true;
1539                 }
1540                 std::string opertype = params[0];
1541                 userrec* u = Srv->FindNick(prefix);
1542                 if (u)
1543                 {
1544                         u->modes[UM_OPERATOR] = 1;
1545                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
1546                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
1547                 }
1548                 return true;
1549         }
1550
1551         /* Because Andy insists that services-compatible servers must
1552          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
1553          */
1554         bool ForceNick(std::string prefix, std::deque<std::string> &params)
1555         {
1556                 if (params.size() < 3)
1557                         return true;
1558
1559                 userrec* u = Srv->FindNick(params[0]);
1560
1561                 if (u)
1562                 {
1563                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
1564                         if (IS_LOCAL(u))
1565                         {
1566                                 std::deque<std::string> par;
1567                                 par.push_back(params[1]);
1568                                 /* This is not required as one is sent in OnUserPostNick below
1569                                  */
1570                                 //DoOneToMany(u->nick,"NICK",par);
1571                                 Srv->ChangeUserNick(u,params[1]);
1572                                 u->age = atoi(params[2].c_str());
1573                         }
1574                 }
1575                 return true;
1576         }
1577
1578         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
1579         {
1580                 if (params.size() < 2)
1581                         return true;
1582
1583                 userrec* u = Srv->FindNick(params[0]);
1584
1585                 if (u)
1586                 {
1587                         Srv->JoinUserToChannel(u,params[1],"");
1588                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
1589                 }
1590                 return true;
1591         }
1592
1593         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
1594         {
1595                 if (params.size() < 1)
1596                         return false;
1597
1598                 std::string servermask = params[0];
1599
1600                 if (Srv->MatchText(Srv->GetServerName(),servermask))
1601                 {
1602                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
1603                         Srv->RehashServer();
1604                         ReadConfiguration(false);
1605                 }
1606                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
1607                 return true;
1608         }
1609
1610         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
1611         {
1612                 if (params.size() != 2)
1613                         return true;
1614
1615                 std::string nick = params[0];
1616                 userrec* u = Srv->FindNick(prefix);
1617                 userrec* who = Srv->FindNick(nick);
1618
1619                 if (who)
1620                 {
1621                         /* Prepend kill source, if we don't have one */
1622                         std::string sourceserv = prefix;
1623                         if (u)
1624                         {
1625                                 sourceserv = u->server;
1626                         }
1627                         if (*(params[1].c_str()) != '[')
1628                         {
1629                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
1630                         }
1631                         std::string reason = params[1];
1632                         params[1] = ":" + params[1];
1633                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
1634                         ::Write(who->fd, ":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
1635                         Srv->QuitUser(who,reason);
1636                 }
1637                 return true;
1638         }
1639
1640         bool LocalPong(std::string prefix, std::deque<std::string> &params)
1641         {
1642                 if (params.size() < 1)
1643                         return true;
1644
1645                 if (params.size() == 1)
1646                 {
1647                         TreeServer* ServerSource = FindServer(prefix);
1648                         if (ServerSource)
1649                         {
1650                                 ServerSource->SetPingFlag();
1651                         }
1652                 }
1653                 else
1654                 {
1655                         std::string forwardto = params[1];
1656                         if (forwardto == Srv->GetServerName())
1657                         {
1658                                 /*
1659                                  * this is a PONG for us
1660                                  * if the prefix is a user, check theyre local, and if they are,
1661                                  * dump the PONG reply back to their fd. If its a server, do nowt.
1662                                  * Services might want to send these s->s, but we dont need to yet.
1663                                  */
1664                                 userrec* u = Srv->FindNick(prefix);
1665
1666                                 if (u)
1667                                 {
1668                                         WriteServ(u->fd,"PONG %s %s",params[0].c_str(),params[1].c_str());
1669                                 }
1670                         }
1671                         else
1672                         {
1673                                 // not for us, pass it on :)
1674                                 DoOneToOne(prefix,"PONG",params,forwardto);
1675                         }
1676                 }
1677
1678                 return true;
1679         }
1680
1681         bool MetaData(std::string prefix, std::deque<std::string> &params)
1682         {
1683                 if (params.size() < 3)
1684                         return true;
1685
1686                 TreeServer* ServerSource = FindServer(prefix);
1687
1688                 if (ServerSource)
1689                 {
1690                         if (params[0] == "*")
1691                         {
1692                                 FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
1693                         }
1694                         else if (*(params[0].c_str()) == '#')
1695                         {
1696                                 chanrec* c = Srv->FindChannel(params[0]);
1697                                 if (c)
1698                                 {
1699                                         FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
1700                                 }
1701                         }
1702                         else if (*(params[0].c_str()) != '#')
1703                         {
1704                                 userrec* u = Srv->FindNick(params[0]);
1705                                 if (u)
1706                                 {
1707                                         FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
1708                                 }
1709                         }
1710                 }
1711
1712                 params[2] = ":" + params[2];
1713                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
1714                 return true;
1715         }
1716
1717         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
1718         {
1719                 if (params.size() < 1)
1720                         return true;
1721
1722                 TreeServer* ServerSource = FindServer(prefix);
1723
1724                 if (ServerSource)
1725                 {
1726                         ServerSource->SetVersion(params[0]);
1727                 }
1728                 params[0] = ":" + params[0];
1729                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
1730                 return true;
1731         }
1732
1733         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
1734         {
1735                 if (params.size() < 1)
1736                         return true;
1737
1738                 userrec* u = Srv->FindNick(prefix);
1739
1740                 if (u)
1741                 {
1742                         Srv->ChangeHost(u,params[0]);
1743                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
1744                 }
1745                 return true;
1746         }
1747
1748         bool AddLine(std::string prefix, std::deque<std::string> &params)
1749         {
1750                 if (params.size() < 6)
1751                         return true;
1752
1753                 bool propogate = false;
1754
1755                 switch (*(params[0].c_str()))
1756                 {
1757                         case 'Z':
1758                                 propogate = add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1759                                 zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
1760                         break;
1761                         case 'Q':
1762                                 propogate = add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1763                                 qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
1764                         break;
1765                         case 'E':
1766                                 propogate = add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1767                                 eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
1768                         break;
1769                         case 'G':
1770                                 propogate = add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1771                                 gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
1772                         break;
1773                         case 'K':
1774                                 propogate = add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
1775                         break;
1776                         default:
1777                                 /* Just in case... */
1778                                 Srv->SendOpers("*** \2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
1779                                 propogate = false;
1780                         break;
1781                 }
1782
1783                 /* Send it on its way */
1784                 if (propogate)
1785                 {
1786                         if (atoi(params[4].c_str()))
1787                         {
1788                                 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());
1789                         }
1790                         else
1791                         {
1792                                 WriteOpers("*** %s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
1793                         }
1794                         params[5] = ":" + params[5];
1795                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
1796                 }
1797                 if (!this->bursting)
1798                 {
1799                         log(DEBUG,"Applying lines...");
1800                         apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
1801                 }
1802                 return true;
1803         }
1804
1805         bool ChangeName(std::string prefix, std::deque<std::string> &params)
1806         {
1807                 if (params.size() < 1)
1808                         return true;
1809
1810                 userrec* u = Srv->FindNick(prefix);
1811
1812                 if (u)
1813                 {
1814                         Srv->ChangeGECOS(u,params[0]);
1815                         params[0] = ":" + params[0];
1816                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
1817                 }
1818                 return true;
1819         }
1820
1821         bool Whois(std::string prefix, std::deque<std::string> &params)
1822         {
1823                 if (params.size() < 1)
1824                         return true;
1825
1826                 log(DEBUG,"In IDLE command");
1827                 userrec* u = Srv->FindNick(prefix);
1828
1829                 if (u)
1830                 {
1831                         log(DEBUG,"USER EXISTS: %s",u->nick);
1832                         // an incoming request
1833                         if (params.size() == 1)
1834                         {
1835                                 userrec* x = Srv->FindNick(params[0]);
1836                                 if ((x) && (x->fd > -1))
1837                                 {
1838                                         userrec* x = Srv->FindNick(params[0]);
1839                                         log(DEBUG,"Got IDLE");
1840                                         char signon[MAXBUF];
1841                                         char idle[MAXBUF];
1842                                         log(DEBUG,"Sending back IDLE 3");
1843                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
1844                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
1845                                         std::deque<std::string> par;
1846                                         par.push_back(prefix);
1847                                         par.push_back(signon);
1848                                         par.push_back(idle);
1849                                         // ours, we're done, pass it BACK
1850                                         DoOneToOne(params[0],"IDLE",par,u->server);
1851                                 }
1852                                 else
1853                                 {
1854                                         // not ours pass it on
1855                                         DoOneToOne(prefix,"IDLE",params,x->server);
1856                                 }
1857                         }
1858                         else if (params.size() == 3)
1859                         {
1860                                 std::string who_did_the_whois = params[0];
1861                                 userrec* who_to_send_to = Srv->FindNick(who_did_the_whois);
1862                                 if ((who_to_send_to) && (who_to_send_to->fd > -1))
1863                                 {
1864                                         log(DEBUG,"Got final IDLE");
1865                                         // an incoming reply to a whois we sent out
1866                                         std::string nick_whoised = prefix;
1867                                         unsigned long signon = atoi(params[1].c_str());
1868                                         unsigned long idle = atoi(params[2].c_str());
1869                                         if ((who_to_send_to) && (who_to_send_to->fd > -1))
1870                                                 do_whois(who_to_send_to,u,signon,idle,nick_whoised.c_str());
1871                                 }
1872                                 else
1873                                 {
1874                                         // not ours, pass it on
1875                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
1876                                 }
1877                         }
1878                 }
1879                 return true;
1880         }
1881
1882         bool Push(std::string prefix, std::deque<std::string> &params)
1883         {
1884                 if (params.size() < 2)
1885                         return true;
1886
1887                 userrec* u = Srv->FindNick(params[0]);
1888
1889                 if (!u)
1890                         return true;
1891
1892                 if (IS_LOCAL(u))
1893                 {
1894                         // push the raw to the user
1895                         if (Srv->IsUlined(prefix))
1896                         {
1897                                 ::Write(u->fd,"%s",params[1].c_str());
1898                         }
1899                         else
1900                         {
1901                                 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());
1902                         }
1903                 }
1904                 else
1905                 {
1906                         // continue the raw onwards
1907                         params[1] = ":" + params[1];
1908                         DoOneToOne(prefix,"PUSH",params,u->server);
1909                 }
1910                 return true;
1911         }
1912
1913         bool Time(std::string prefix, std::deque<std::string> &params)
1914         {
1915                 // :source.server TIME remote.server sendernick
1916                 // :remote.server TIME source.server sendernick TS
1917                 if (params.size() == 2)
1918                 {
1919                         // someone querying our time?
1920                         if (Srv->GetServerName() == params[0])
1921                         {
1922                                 userrec* u = Srv->FindNick(params[1]);
1923                                 if (u)
1924                                 {
1925                                         char curtime[256];
1926                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
1927                                         params.push_back(curtime);
1928                                         params[0] = prefix;
1929                                         DoOneToOne(Srv->GetServerName(),"TIME",params,params[0]);
1930                                 }
1931                         }
1932                         else
1933                         {
1934                                 // not us, pass it on
1935                                 userrec* u = Srv->FindNick(params[1]);
1936                                 if (u)
1937                                         DoOneToOne(prefix,"TIME",params,params[0]);
1938                         }
1939                 }
1940                 else if (params.size() == 3)
1941                 {
1942                         // a response to a previous TIME
1943                         userrec* u = Srv->FindNick(params[1]);
1944                         if ((u) && (IS_LOCAL(u)))
1945                         {
1946                         time_t rawtime = atol(params[2].c_str());
1947                         struct tm * timeinfo;
1948                         timeinfo = localtime(&rawtime);
1949                                 char tms[26];
1950                                 snprintf(tms,26,"%s",asctime(timeinfo));
1951                                 tms[24] = 0;
1952                         WriteServ(u->fd,"391 %s %s :%s",u->nick,prefix.c_str(),tms);
1953                         }
1954                         else
1955                         {
1956                                 if (u)
1957                                         DoOneToOne(prefix,"TIME",params,u->server);
1958                         }
1959                 }
1960                 return true;
1961         }
1962
1963         bool LocalPing(std::string prefix, std::deque<std::string> &params)
1964         {
1965                 if (params.size() < 1)
1966                         return true;
1967
1968                 if (params.size() == 1)
1969                 {
1970                         std::string stufftobounce = params[0];
1971                         this->WriteLine(":"+Srv->GetServerName()+" PONG "+stufftobounce);
1972                         return true;
1973                 }
1974                 else
1975                 {
1976                         std::string forwardto = params[1];
1977                         if (forwardto == Srv->GetServerName())
1978                         {
1979                                 // this is a ping for us, send back PONG to the requesting server
1980                                 params[1] = params[0];
1981                                 params[0] = forwardto;
1982                                 DoOneToOne(forwardto,"PONG",params,params[1]);
1983                         }
1984                         else
1985                         {
1986                                 // not for us, pass it on :)
1987                                 DoOneToOne(prefix,"PING",params,forwardto);
1988                         }
1989                         return true;
1990                 }
1991         }
1992
1993         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
1994         {
1995                 if (params.size() < 4)
1996                         return false;
1997
1998                 std::string servername = params[0];
1999                 std::string password = params[1];
2000                 // hopcount is not used for a remote server, we calculate this ourselves
2001                 std::string description = params[3];
2002                 TreeServer* ParentOfThis = FindServer(prefix);
2003
2004                 if (!ParentOfThis)
2005                 {
2006                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2007                         return false;
2008                 }
2009                 TreeServer* CheckDupe = FindServer(servername);
2010                 if (CheckDupe)
2011                 {
2012                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2013                         Srv->SendOpers("*** Server connection from \2"+servername+"\2 denied, already exists");
2014                         return false;
2015                 }
2016                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
2017                 ParentOfThis->AddChild(Node);
2018                 params[3] = ":" + params[3];
2019                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2020                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2021                 return true;
2022         }
2023
2024         bool Outbound_Reply_Server(std::deque<std::string> &params)
2025         {
2026                 if (params.size() < 4)
2027                         return false;
2028
2029                 irc::string servername = params[0].c_str();
2030                 std::string sname = params[0];
2031                 std::string password = params[1];
2032                 int hops = atoi(params[2].c_str());
2033
2034                 if (hops)
2035                 {
2036                         this->WriteLine("ERROR :Server too far away for authentication");
2037                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2038                         return false;
2039                 }
2040                 std::string description = params[3];
2041                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2042                 {
2043                         if ((x->Name == servername) && (x->RecvPass == password))
2044                         {
2045                                 TreeServer* CheckDupe = FindServer(sname);
2046                                 if (CheckDupe)
2047                                 {
2048                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2049                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2050                                         return false;
2051                                 }
2052                                 // Begin the sync here. this kickstarts the
2053                                 // other side, waiting in WAIT_AUTH_2 state,
2054                                 // into starting their burst, as it shows
2055                                 // that we're happy.
2056                                 this->LinkState = CONNECTED;
2057                                 // we should add the details of this server now
2058                                 // to the servers tree, as a child of the root
2059                                 // node.
2060                                 TreeServer* Node = new TreeServer(sname,description,TreeRoot,this);
2061                                 TreeRoot->AddChild(Node);
2062                                 params[3] = ":" + params[3];
2063                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2064                                 this->bursting = true;
2065                                 this->DoBurst(Node);
2066                                 return true;
2067                         }
2068                 }
2069                 this->WriteLine("ERROR :Invalid credentials");
2070                 Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2071                 return false;
2072         }
2073
2074         bool Inbound_Server(std::deque<std::string> &params)
2075         {
2076                 if (params.size() < 4)
2077                         return false;
2078
2079                 irc::string servername = params[0].c_str();
2080                 std::string sname = params[0];
2081                 std::string password = params[1];
2082                 int hops = atoi(params[2].c_str());
2083
2084                 if (hops)
2085                 {
2086                         this->WriteLine("ERROR :Server too far away for authentication");
2087                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2088                         return false;
2089                 }
2090                 std::string description = params[3];
2091                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2092                 {
2093                         if ((x->Name == servername) && (x->RecvPass == password))
2094                         {
2095                                 TreeServer* CheckDupe = FindServer(sname);
2096                                 if (CheckDupe)
2097                                 {
2098                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2099                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2100                                         return false;
2101                                 }
2102                                 /* If the config says this link is encrypted, but the remote side
2103                                  * hasnt bothered to send the AES command before SERVER, then we
2104                                  * boot them off as we MUST have this connection encrypted.
2105                                  */
2106                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2107                                 {
2108                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2109                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2110                                         return false;
2111                                 }
2112                                 Srv->SendOpers("*** Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2113                                 this->InboundServerName = sname;
2114                                 this->InboundDescription = description;
2115                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2116                                 // along with the sendpass from this block.
2117                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
2118                                 // move to the next state, we are now waiting for THEM.
2119                                 this->LinkState = WAIT_AUTH_2;
2120                                 return true;
2121                         }
2122                 }
2123                 this->WriteLine("ERROR :Invalid credentials");
2124                 Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2125                 return false;
2126         }
2127
2128         void Split(std::string line, bool stripcolon, std::deque<std::string> &n)
2129         {
2130                 // we don't do anything with a line > 2048
2131                 if (line.length() > 2048)
2132                 {
2133                         log(DEBUG,"Line too long!");
2134                         return;
2135                 }
2136                 if (!strchr(line.c_str(),' '))
2137                 {
2138                         n.push_back(line);
2139                         return;
2140                 }
2141                 std::stringstream s(line);
2142                 int count = 0;
2143                 char param[1024];
2144                 char* pptr = param;
2145
2146                 n.clear();
2147                 int item = 0;
2148                 while (!s.eof())
2149                 {
2150                         char c = 0;
2151                         s.get(c);
2152                         if (c == ' ')
2153                         {
2154                                 *pptr = 0;
2155                                 if (*param)
2156                                         n.push_back(param);
2157                                 *param = count = 0;
2158                                 pptr = param;
2159                                 item++;
2160                         }
2161                         else
2162                         {
2163                                 if (!s.eof())
2164                                 {
2165                                         *pptr++ = c;
2166                                         count++;
2167                                 }
2168                                 if ((*param == ':') && (count == 1) && (item > 0))
2169                                 {
2170                                         *param = count = 0;
2171                                         pptr = param;
2172                                         while (!s.eof())
2173                                         {
2174                                                 s.get(c);
2175                                                 if (!s.eof())
2176                                                 {
2177                                                         *pptr++ = c;
2178                                                         count++;
2179                                                 }
2180                                         }
2181                                         *pptr = 0;
2182                                         n.push_back(param);
2183                                         *param = count = 0;
2184                                         pptr = param;
2185                                 }
2186                         }
2187                 }
2188                 *pptr = 0;
2189                 if (*param)
2190                 {
2191                         n.push_back(param);
2192                 }
2193
2194                 return;
2195         }
2196
2197         bool ProcessLine(std::string line)
2198         {
2199                 std::deque<std::string> params;
2200                 irc::string command;
2201                 std::string prefix;
2202
2203                 if (line.empty())
2204                         return true;
2205
2206                 line = line.substr(0, line.find_first_of("\r\n"));
2207
2208                 log(DEBUG,"IN: %s", line.c_str());
2209
2210                 this->Split(line.c_str(),true,params);
2211
2212                 if ((params[0][0] == ':') && (params.size() > 1))
2213                 {
2214                         prefix = params[0].substr(1);
2215                         params.pop_front();
2216                 }
2217
2218                 command = params[0].c_str();
2219                 params.pop_front();
2220
2221                 if ((!this->ctx_in) && (command == "AES"))
2222                 {
2223                         std::string sserv = params[0];
2224                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2225                         {
2226                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2227                                 {
2228                                         this->InitAES(x->EncryptionKey,sserv);
2229                                 }
2230                         }
2231
2232                         return true;
2233                 }
2234                 else if ((this->ctx_in) && (command == "AES"))
2235                 {
2236                         WriteOpers("*** \2AES\2: Encryption already enabled on this connection yet %s is trying to enable it twice!",params[0].c_str());
2237                 }
2238
2239                 switch (this->LinkState)
2240                 {
2241                         TreeServer* Node;
2242
2243                         case WAIT_AUTH_1:
2244                                 // Waiting for SERVER command from remote server. Server initiating
2245                                 // the connection sends the first SERVER command, listening server
2246                                 // replies with theirs if its happy, then if the initiator is happy,
2247                                 // it starts to send its net sync, which starts the merge, otherwise
2248                                 // it sends an ERROR.
2249                                 if (command == "PASS")
2250                                 {
2251                                         /* Silently ignored */
2252                                 }
2253                                 else if (command == "SERVER")
2254                                 {
2255                                         return this->Inbound_Server(params);
2256                                 }
2257                                 else if (command == "ERROR")
2258                                 {
2259                                         return this->Error(params);
2260                                 }
2261                                 else if (command == "USER")
2262                                 {
2263                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2264                                         return false;
2265                                 }
2266                                 else if (command == "CAPAB")
2267                                 {
2268                                         return this->Capab(params);
2269                                 }
2270                                 else if ((command == "U") || (command == "S"))
2271                                 {
2272                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2273                                         return false;
2274                                 }
2275                                 else
2276                                 {
2277                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2278                                         return false;
2279                                 }
2280                         break;
2281                         case WAIT_AUTH_2:
2282                                 // Waiting for start of other side's netmerge to say they liked our
2283                                 // password.
2284                                 if (command == "SERVER")
2285                                 {
2286                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2287                                         // silently ignore.
2288                                         return true;
2289                                 }
2290                                 else if ((command == "U") || (command == "S"))
2291                                 {
2292                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2293                                         return false;
2294                                 }
2295                                 else if (command == "BURST")
2296                                 {
2297                                         if (params.size())
2298                                         {
2299                                                 /* If a time stamp is provided, try and check syncronization */
2300                                                 time_t THEM = atoi(params[0].c_str());
2301                                                 long delta = THEM-time(NULL);
2302                                                 if ((delta < -600) || (delta > 600))
2303                                                 {
2304                                                         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));
2305                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2306                                                         return false;
2307                                                 }
2308                                                 else if ((delta < -60) || (delta > 60))
2309                                                 {
2310                                                         WriteOpers("*** \2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2311                                                 }
2312                                         }
2313                                         this->LinkState = CONNECTED;
2314                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
2315                                         TreeRoot->AddChild(Node);
2316                                         params.clear();
2317                                         params.push_back(InboundServerName);
2318                                         params.push_back("*");
2319                                         params.push_back("1");
2320                                         params.push_back(":"+InboundDescription);
2321                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2322                                         this->bursting = true;
2323                                         this->DoBurst(Node);
2324                                 }
2325                                 else if (command == "ERROR")
2326                                 {
2327                                         return this->Error(params);
2328                                 }
2329                                 else if (command == "CAPAB")
2330                                 {
2331                                         return this->Capab(params);
2332                                 }
2333
2334                         break;
2335                         case LISTENER:
2336                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2337                                 return false;
2338                         break;
2339                         case CONNECTING:
2340                                 if (command == "SERVER")
2341                                 {
2342                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2343                                         // has just sent us their credentials. If we get this far, theyre
2344                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2345                                         // if we're happy with this, we should send our netburst which
2346                                         // kickstarts the merge.
2347                                         return this->Outbound_Reply_Server(params);
2348                                 }
2349                                 else if (command == "ERROR")
2350                                 {
2351                                         return this->Error(params);
2352                                 }
2353                         break;
2354                         case CONNECTED:
2355                                 // This is the 'authenticated' state, when all passwords
2356                                 // have been exchanged and anything past this point is taken
2357                                 // as gospel.
2358
2359                                 if (prefix != "")
2360                                 {
2361                                         std::string direction = prefix;
2362                                         userrec* t = Srv->FindNick(prefix);
2363                                         if (t)
2364                                         {
2365                                                 direction = t->server;
2366                                         }
2367                                         TreeServer* route_back_again = BestRouteTo(direction);
2368                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2369                                         {
2370                                                 if (route_back_again)
2371                                                         log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2372                                                 return true;
2373                                         }
2374
2375                                         /* Fix by brain:
2376                                          * When there is activity on the socket, reset the ping counter so
2377                                          * that we're not wasting bandwidth pinging an active server.
2378                                          */
2379                                         route_back_again->SetNextPingTime(time(NULL) + 120);
2380                                         route_back_again->SetPingFlag();
2381                                 }
2382
2383                                 if (command == "SVSMODE")
2384                                 {
2385                                         /* Services expects us to implement
2386                                          * SVSMODE. In inspircd its the same as
2387                                          * MODE anyway.
2388                                          */
2389                                         command = "MODE";
2390                                 }
2391                                 std::string target = "";
2392                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
2393                                  * working with std::string here.
2394                                  */
2395                                 if ((command == "NICK") && (params.size() > 1))
2396                                 {
2397                                         return this->IntroduceClient(prefix,params);
2398                                 }
2399                                 else if (command == "FJOIN")
2400                                 {
2401                                         return this->ForceJoin(prefix,params);
2402                                 }
2403                                 else if (command == "SYNCTS")
2404                                 {
2405                                         return this->SyncChannelTS(prefix,params);
2406                                 }
2407                                 else if (command == "SERVER")
2408                                 {
2409                                         return this->RemoteServer(prefix,params);
2410                                 }
2411                                 else if (command == "ERROR")
2412                                 {
2413                                         return this->Error(params);
2414                                 }
2415                                 else if (command == "OPERTYPE")
2416                                 {
2417                                         return this->OperType(prefix,params);
2418                                 }
2419                                 else if (command == "FMODE")
2420                                 {
2421                                         return this->ForceMode(prefix,params);
2422                                 }
2423                                 else if (command == "KILL")
2424                                 {
2425                                         return this->RemoteKill(prefix,params);
2426                                 }
2427                                 else if (command == "FTOPIC")
2428                                 {
2429                                         return this->ForceTopic(prefix,params);
2430                                 }
2431                                 else if (command == "REHASH")
2432                                 {
2433                                         return this->RemoteRehash(prefix,params);
2434                                 }
2435                                 else if (command == "METADATA")
2436                                 {
2437                                         return this->MetaData(prefix,params);
2438                                 }
2439                                 else if (command == "PING")
2440                                 {
2441                                         /*
2442                                          * We just got a ping from a server that's bursting.
2443                                          * This can't be right, so set them to not bursting, and
2444                                          * apply their lines.
2445                                          */
2446                                         if (this->bursting)
2447                                         {
2448                                                 this->bursting = false;
2449                                                 apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2450                                         }
2451                                         if (prefix == "")
2452                                         {
2453                                                 prefix = this->GetName();
2454                                         }
2455                                         return this->LocalPing(prefix,params);
2456                                 }
2457                                 else if (command == "PONG")
2458                                 {
2459                                         /*
2460                                          * We just got a pong from a server that's bursting.
2461                                          * This can't be right, so set them to not bursting, and
2462                                          * apply their lines.
2463                                          */
2464                                         if (this->bursting)
2465                                         {
2466                                                 this->bursting = false;
2467                                                 apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2468                                         }
2469                                         if (prefix == "")
2470                                         {
2471                                                 prefix = this->GetName();
2472                                         }
2473                                         return this->LocalPong(prefix,params);
2474                                 }
2475                                 else if (command == "VERSION")
2476                                 {
2477                                         return this->ServerVersion(prefix,params);
2478                                 }
2479                                 else if (command == "FHOST")
2480                                 {
2481                                         return this->ChangeHost(prefix,params);
2482                                 }
2483                                 else if (command == "FNAME")
2484                                 {
2485                                         return this->ChangeName(prefix,params);
2486                                 }
2487                                 else if (command == "ADDLINE")
2488                                 {
2489                                         return this->AddLine(prefix,params);
2490                                 }
2491                                 else if (command == "SVSNICK")
2492                                 {
2493                                         if (prefix == "")
2494                                         {
2495                                                 prefix = this->GetName();
2496                                         }
2497                                         return this->ForceNick(prefix,params);
2498                                 }
2499                                 else if (command == "IDLE")
2500                                 {
2501                                         return this->Whois(prefix,params);
2502                                 }
2503                                 else if (command == "PUSH")
2504                                 {
2505                                         return this->Push(prefix,params);
2506                                 }
2507                                 else if (command == "TIME")
2508                                 {
2509                                         return this->Time(prefix,params);
2510                                 }
2511                                 else if ((command == "KICK") && (IsServer(prefix)))
2512                                 {
2513                                         std::string sourceserv = this->myhost;
2514                                         if (params.size() == 3)
2515                                         {
2516                                                 userrec* user = Srv->FindNick(params[1]);
2517                                                 chanrec* chan = Srv->FindChannel(params[0]);
2518                                                 if (user && chan)
2519                                                 {
2520                                                         server_kick_channel(user,chan,(char*)params[2].c_str(),false);
2521                                                 }
2522                                         }
2523                                         if (this->InboundServerName != "")
2524                                         {
2525                                                 sourceserv = this->InboundServerName;
2526                                         }
2527                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2528                                 }
2529                                 else if (command == "SVSJOIN")
2530                                 {
2531                                         if (prefix == "")
2532                                         {
2533                                                 prefix = this->GetName();
2534                                         }
2535                                         return this->ServiceJoin(prefix,params);
2536                                 }
2537                                 else if (command == "SQUIT")
2538                                 {
2539                                         if (params.size() == 2)
2540                                         {
2541                                                 this->Squit(FindServer(params[0]),params[1]);
2542                                         }
2543                                         return true;
2544                                 }
2545                                 else if (command == "ENDBURST")
2546                                 {
2547                                         this->bursting = false;
2548                                         apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2549                                         std::string sourceserv = this->myhost;
2550                                         if (this->InboundServerName != "")
2551                                         {
2552                                                 sourceserv = this->InboundServerName;
2553                                         }
2554                                         WriteOpers("*** Received end of netburst from \2%s\2",sourceserv.c_str());
2555                                         return true;
2556                                 }
2557                                 else
2558                                 {
2559                                         // not a special inter-server command.
2560                                         // Emulate the actual user doing the command,
2561                                         // this saves us having a huge ugly parser.
2562                                         userrec* who = Srv->FindNick(prefix);
2563                                         std::string sourceserv = this->myhost;
2564                                         if (this->InboundServerName != "")
2565                                         {
2566                                                 sourceserv = this->InboundServerName;
2567                                         }
2568                                         if (who)
2569                                         {
2570                                                 if (command == "QUIT")
2571                                                 {
2572                                                         TreeServer* s = FindServer(who->server);
2573                                                         if (s)
2574                                                         {
2575                                                                 s->DelUser(who);
2576                                                         }
2577                                                 }
2578                                                 else if ((command == "NICK") && (params.size() > 0))
2579                                                 {
2580                                                         /* On nick messages, check that the nick doesnt
2581                                                          * already exist here. If it does, kill their copy,
2582                                                          * and our copy.
2583                                                          */
2584                                                         userrec* x = Srv->FindNick(params[0]);
2585                                                         if ((x) && (x != who))
2586                                                         {
2587                                                                 std::deque<std::string> p;
2588                                                                 p.push_back(params[0]);
2589                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
2590                                                                 DoOneToMany(Srv->GetServerName(),"KILL",p);
2591                                                                 p.clear();
2592                                                                 p.push_back(prefix);
2593                                                                 p.push_back("Nickname collision");
2594                                                                 DoOneToMany(Srv->GetServerName(),"KILL",p);
2595                                                                 Srv->QuitUser(x,"Nickname collision ("+prefix+" -> "+params[0]+")");
2596                                                                 userrec* y = Srv->FindNick(prefix);
2597                                                                 if (y)
2598                                                                 {
2599                                                                         TreeServer* n = FindServer(y->server);
2600                                                                         if (n)
2601                                                                         {
2602                                                                                 n->DelUser(y);
2603                                                                         }
2604                                                                         Srv->QuitUser(y,"Nickname collision");
2605                                                                 }
2606                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2607                                                         }
2608                                                 }
2609                                                 // its a user
2610                                                 target = who->server;
2611                                                 char* strparams[127];
2612                                                 for (unsigned int q = 0; q < params.size(); q++)
2613                                                 {
2614                                                         strparams[q] = (char*)params[q].c_str();
2615                                                 }
2616                                                 if (!Srv->CallCommandHandler(command.c_str(), strparams, params.size(), who))
2617                                                 {
2618                                                         this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
2619                                                         return false;
2620                                                 }
2621                                         }
2622                                         else
2623                                         {
2624                                                 // its not a user. Its either a server, or somethings screwed up.
2625                                                 if (IsServer(prefix))
2626                                                 {
2627                                                         target = Srv->GetServerName();
2628                                                 }
2629                                                 else
2630                                                 {
2631                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
2632                                                         return true;
2633                                                 }
2634                                         }
2635                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2636
2637                                 }
2638                                 return true;
2639                         break;
2640                 }
2641                 return true;
2642         }
2643
2644         virtual std::string GetName()
2645         {
2646                 std::string sourceserv = this->myhost;
2647                 if (this->InboundServerName != "")
2648                 {
2649                         sourceserv = this->InboundServerName;
2650                 }
2651                 return sourceserv;
2652         }
2653
2654         virtual void OnTimeout()
2655         {
2656                 if (this->LinkState == CONNECTING)
2657                 {
2658                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
2659                 }
2660         }
2661
2662         virtual void OnClose()
2663         {
2664                 // Connection closed.
2665                 // If the connection is fully up (state CONNECTED)
2666                 // then propogate a netsplit to all peers.
2667                 std::string quitserver = this->myhost;
2668                 if (this->InboundServerName != "")
2669                 {
2670                         quitserver = this->InboundServerName;
2671                 }
2672                 TreeServer* s = FindServer(quitserver);
2673                 if (s)
2674                 {
2675                         Squit(s,"Remote host closed the connection");
2676                 }
2677                 WriteOpers("Server '\2%s\2' closed the connection.",quitserver.c_str());
2678         }
2679
2680         virtual int OnIncomingConnection(int newsock, char* ip)
2681         {
2682                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
2683                  * or discovering if this port is the server port, we don't allow connections from any
2684                  * IPs for which we don't have a link block.
2685                  */
2686                 bool found = false;
2687                 char resolved_host[MAXBUF];
2688                 vector<Link>::iterator i;
2689                 for (i = LinkBlocks.begin(); i != LinkBlocks.end(); i++)
2690                 {
2691                         if (i->IPAddr == ip)
2692                         {
2693                                 found = true;
2694                                 break;
2695                         }
2696                         /* XXX: Fixme: blocks for a very short amount of time,
2697                          * we should cache these on rehash/startup
2698                          */
2699                         if (CleanAndResolve(resolved_host,i->IPAddr.c_str(),true))
2700                         {
2701                                 if (std::string(resolved_host) == ip)
2702                                 {
2703                                         found = true;
2704                                         break;
2705                                 }
2706                         }
2707                 }
2708                 if (!found)
2709                 {
2710                         WriteOpers("Server connection from %s denied (no link blocks with that IP address)", ip);
2711                         close(newsock);
2712                         return false;
2713                 }
2714                 TreeSocket* s = new TreeSocket(newsock, ip);
2715                 Srv->AddSocket(s);
2716                 return true;
2717         }
2718 };
2719
2720 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
2721 {
2722         for (unsigned int c = 0; c < list.size(); c++)
2723         {
2724                 if (list[c] == server)
2725                 {
2726                         return;
2727                 }
2728         }
2729         list.push_back(server);
2730 }
2731
2732 // returns a list of DIRECT servernames for a specific channel
2733 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
2734 {
2735         CUList *ulist = c->GetUsers();
2736         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2737         {
2738                 if (i->second->fd < 0)
2739                 {
2740                         TreeServer* best = BestRouteTo(i->second->server);
2741                         if (best)
2742                                 AddThisServer(best,list);
2743                 }
2744         }
2745         return;
2746 }
2747
2748 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
2749 {
2750         TreeServer* omitroute = BestRouteTo(omit);
2751         if ((command == "NOTICE") || (command == "PRIVMSG"))
2752         {
2753                 if ((params.size() >= 2) && (*(params[0].c_str()) != '$'))
2754                 {
2755                         /* Prefixes */
2756                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
2757                         {
2758                                 params[0] = params[0].substr(1, params[0].length()-1);
2759                         }
2760                         if (*(params[0].c_str()) != '#')
2761                         {
2762                                 // special routing for private messages/notices
2763                                 userrec* d = Srv->FindNick(params[0]);
2764                                 if (d)
2765                                 {
2766                                         std::deque<std::string> par;
2767                                         par.push_back(params[0]);
2768                                         par.push_back(":"+params[1]);
2769                                         DoOneToOne(prefix,command.c_str(),par,d->server);
2770                                         return true;
2771                                 }
2772                         }
2773                         else
2774                         {
2775                                 log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
2776                                 chanrec* c = Srv->FindChannel(params[0]);
2777                                 if (c)
2778                                 {
2779                                         std::deque<TreeServer*> list;
2780                                         GetListOfServersForChannel(c,list);
2781                                         log(DEBUG,"Got a list of %d servers",list.size());
2782                                         unsigned int lsize = list.size();
2783                                         for (unsigned int i = 0; i < lsize; i++)
2784                                         {
2785                                                 TreeSocket* Sock = list[i]->GetSocket();
2786                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
2787                                                 {
2788                                                         log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
2789                                                         Sock->WriteLine(data);
2790                                                 }
2791                                         }
2792                                         return true;
2793                                 }
2794                         }
2795                 }
2796         }
2797         unsigned int items = TreeRoot->ChildCount();
2798         for (unsigned int x = 0; x < items; x++)
2799         {
2800                 TreeServer* Route = TreeRoot->GetChild(x);
2801                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
2802                 {
2803                         TreeSocket* Sock = Route->GetSocket();
2804                         Sock->WriteLine(data);
2805                 }
2806         }
2807         return true;
2808 }
2809
2810 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
2811 {
2812         TreeServer* omitroute = BestRouteTo(omit);
2813         std::string FullLine = ":" + prefix + " " + command;
2814         unsigned int words = params.size();
2815         for (unsigned int x = 0; x < words; x++)
2816         {
2817                 FullLine = FullLine + " " + params[x];
2818         }
2819         unsigned int items = TreeRoot->ChildCount();
2820         for (unsigned int x = 0; x < items; x++)
2821         {
2822                 TreeServer* Route = TreeRoot->GetChild(x);
2823                 // Send the line IF:
2824                 // The route has a socket (its a direct connection)
2825                 // The route isnt the one to be omitted
2826                 // The route isnt the path to the one to be omitted
2827                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
2828                 {
2829                         TreeSocket* Sock = Route->GetSocket();
2830                         Sock->WriteLine(FullLine);
2831                 }
2832         }
2833         return true;
2834 }
2835
2836 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
2837 {
2838         std::string FullLine = ":" + prefix + " " + command;
2839         unsigned int words = params.size();
2840         for (unsigned int x = 0; x < words; x++)
2841         {
2842                 FullLine = FullLine + " " + params[x];
2843         }
2844         unsigned int items = TreeRoot->ChildCount();
2845         for (unsigned int x = 0; x < items; x++)
2846         {
2847                 TreeServer* Route = TreeRoot->GetChild(x);
2848                 if (Route->GetSocket())
2849                 {
2850                         TreeSocket* Sock = Route->GetSocket();
2851                         Sock->WriteLine(FullLine);
2852                 }
2853         }
2854         return true;
2855 }
2856
2857 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
2858 {
2859         TreeServer* Route = BestRouteTo(target);
2860         if (Route)
2861         {
2862                 std::string FullLine = ":" + prefix + " " + command;
2863                 unsigned int words = params.size();
2864                 for (unsigned int x = 0; x < words; x++)
2865                 {
2866                         FullLine = FullLine + " " + params[x];
2867                 }
2868                 if (Route->GetSocket())
2869                 {
2870                         TreeSocket* Sock = Route->GetSocket();
2871                         Sock->WriteLine(FullLine);
2872                 }
2873                 return true;
2874         }
2875         else
2876         {
2877                 return true;
2878         }
2879 }
2880
2881 std::vector<TreeSocket*> Bindings;
2882
2883 void ReadConfiguration(bool rebind)
2884 {
2885         Conf = new ConfigReader;
2886         if (rebind)
2887         {
2888                 for (int j =0; j < Conf->Enumerate("bind"); j++)
2889                 {
2890                         std::string Type = Conf->ReadValue("bind","type",j);
2891                         std::string IP = Conf->ReadValue("bind","address",j);
2892                         long Port = Conf->ReadInteger("bind","port",j,true);
2893                         if (Type == "servers")
2894                         {
2895                                 if (IP == "*")
2896                                 {
2897                                         IP = "";
2898                                 }
2899                                 TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
2900                                 if (listener->GetState() == I_LISTENING)
2901                                 {
2902                                         Srv->AddSocket(listener);
2903                                         Bindings.push_back(listener);
2904                                 }
2905                                 else
2906                                 {
2907                                         log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
2908                                         listener->Close();
2909                                         DELETE(listener);
2910                                 }
2911                         }
2912                 }
2913         }
2914         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
2915         HideULines = Conf->ReadFlag("options","hideulines",0);
2916         LinkBlocks.clear();
2917         for (int j =0; j < Conf->Enumerate("link"); j++)
2918         {
2919                 Link L;
2920                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
2921                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
2922                 L.Port = Conf->ReadInteger("link","port",j,true);
2923                 L.SendPass = Conf->ReadValue("link","sendpass",j);
2924                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
2925                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
2926                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
2927                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
2928                 L.NextConnectTime = time(NULL) + L.AutoConnect;
2929                 /* Bugfix by brain, do not allow people to enter bad configurations */
2930                 if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
2931                 {
2932                         LinkBlocks.push_back(L);
2933                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
2934                 }
2935                 else
2936                 {
2937                         if (L.IPAddr == "")
2938                         {
2939                                 log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
2940                         }
2941                         else if (L.RecvPass == "")
2942                         {
2943                                 log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
2944                         }
2945                         else if (L.SendPass == "")
2946                         {
2947                                 log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
2948                         }
2949                         else if (L.Name == "")
2950                         {
2951                                 log(DEFAULT,"Invalid configuration, link tag without a name!");
2952                         }
2953                         else if (!L.Port)
2954                         {
2955                                 log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
2956                         }
2957                 }
2958         }
2959         DELETE(Conf);
2960 }
2961
2962
2963 class ModuleSpanningTree : public Module
2964 {
2965         std::vector<TreeSocket*> Bindings;
2966         int line;
2967         int NumServers;
2968         unsigned int max_local;
2969         unsigned int max_global;
2970         cmd_rconnect* command_rconnect;
2971
2972  public:
2973
2974         ModuleSpanningTree(Server* Me)
2975                 : Module::Module(Me), max_local(0), max_global(0)
2976         {
2977                 Srv = Me;
2978                 Bindings.clear();
2979
2980                 // Create the root of the tree
2981                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
2982
2983                 ReadConfiguration(true);
2984
2985                 command_rconnect = new cmd_rconnect(this);
2986                 Srv->AddCommand(command_rconnect);
2987         }
2988
2989         void ShowLinks(TreeServer* Current, userrec* user, int hops)
2990         {
2991                 std::string Parent = TreeRoot->GetName();
2992                 if (Current->GetParent())
2993                 {
2994                         Parent = Current->GetParent()->GetName();
2995                 }
2996                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
2997                 {
2998                         if ((HideULines) && (Srv->IsUlined(Current->GetChild(q)->GetName())))
2999                         {
3000                                 if (*user->oper)
3001                                 {
3002                                          ShowLinks(Current->GetChild(q),user,hops+1);
3003                                 }
3004                         }
3005                         else
3006                         {
3007                                 ShowLinks(Current->GetChild(q),user,hops+1);
3008                         }
3009                 }
3010                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3011                 if ((HideULines) && (Srv->IsUlined(Current->GetName())) && (!*user->oper))
3012                         return;
3013                 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());
3014         }
3015
3016         int CountLocalServs()
3017         {
3018                 return TreeRoot->ChildCount();
3019         }
3020
3021         int CountServs()
3022         {
3023                 return serverlist.size();
3024         }
3025
3026         void HandleLinks(char** parameters, int pcnt, userrec* user)
3027         {
3028                 ShowLinks(TreeRoot,user,0);
3029                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
3030                 return;
3031         }
3032
3033         void HandleLusers(char** parameters, int pcnt, userrec* user)
3034         {
3035                 unsigned int n_users = usercnt();
3036
3037                 /* Only update these when someone wants to see them, more efficient */
3038                 if ((unsigned int)local_count() > max_local)
3039                         max_local = local_count();
3040                 if (n_users > max_global)
3041                         max_global = n_users;
3042
3043                 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());
3044                 WriteServ(user->fd,"252 %s %d :operator(s) online",user->nick,usercount_opers());
3045                 WriteServ(user->fd,"253 %s %d :unknown connections",user->nick,usercount_unknown());
3046                 WriteServ(user->fd,"254 %s %d :channels formed",user->nick,chancount());
3047                 WriteServ(user->fd,"254 %s :I have %d clients and %d servers",user->nick,local_count(),this->CountLocalServs());
3048                 WriteServ(user->fd,"265 %s :Current Local Users: %d  Max: %d",user->nick,local_count(),max_local);
3049                 WriteServ(user->fd,"266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3050                 return;
3051         }
3052
3053         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3054
3055         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3056         {
3057                 if (line < 128)
3058                 {
3059                         for (int t = 0; t < depth; t++)
3060                         {
3061                                 matrix[line][t] = ' ';
3062                         }
3063
3064                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3065                         // a 'Spacer' String to compensate.
3066                         char spacer[40];
3067
3068                         memset(spacer,' ',40);
3069                         if ((40 - Current->GetName().length() - depth) > 1) {
3070                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3071                         }
3072                         else
3073                         {
3074                                 spacer[5] = '\0';
3075                         }
3076
3077                         float percent;
3078                         char text[80];
3079                         if (clientlist.size() == 0) {
3080                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3081                                 percent = 0;
3082                         }
3083                         else
3084                         {
3085                                 percent = ((float)Current->GetUserCount() / (float)clientlist.size()) * 100;
3086                         }
3087                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3088                         totusers += Current->GetUserCount();
3089                         totservers++;
3090                         strlcpy(&matrix[line][depth],text,80);
3091                         line++;
3092                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3093                         {
3094                                 if ((HideULines) && (Srv->IsUlined(Current->GetChild(q)->GetName())))
3095                                 {
3096                                         if (*user->oper)
3097                                         {
3098                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3099                                         }
3100                                 }
3101                                 else
3102                                 {
3103                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3104                                 }
3105                         }
3106                 }
3107         }
3108
3109         // Ok, prepare to be confused.
3110         // After much mulling over how to approach this, it struck me that
3111         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3112         // keeping track of a ton of ascii characters, and line by line
3113         // under recursion working out where to place them using multiplications
3114         // and divisons, we instead render the map onto a backplane of characters
3115         // (a character matrix), then draw the branches as a series of "L" shapes
3116         // from the nodes. This is not only friendlier on CPU it uses less stack.
3117
3118         void HandleMap(char** parameters, int pcnt, userrec* user)
3119         {
3120                 // This array represents a virtual screen which we will
3121                 // "scratch" draw to, as the console device of an irc
3122                 // client does not provide for a proper terminal.
3123                 float totusers = 0;
3124                 float totservers = 0;
3125                 char matrix[128][80];
3126                 for (unsigned int t = 0; t < 128; t++)
3127                 {
3128                         matrix[t][0] = '\0';
3129                 }
3130                 line = 0;
3131                 // The only recursive bit is called here.
3132                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3133                 // Process each line one by one. The algorithm has a limit of
3134                 // 128 servers (which is far more than a spanning tree should have
3135                 // anyway, so we're ok). This limit can be raised simply by making
3136                 // the character matrix deeper, 128 rows taking 10k of memory.
3137                 for (int l = 1; l < line; l++)
3138                 {
3139                         // scan across the line looking for the start of the
3140                         // servername (the recursive part of the algorithm has placed
3141                         // the servers at indented positions depending on what they
3142                         // are related to)
3143                         int first_nonspace = 0;
3144                         while (matrix[l][first_nonspace] == ' ')
3145                         {
3146                                 first_nonspace++;
3147                         }
3148                         first_nonspace--;
3149                         // Draw the `- (corner) section: this may be overwritten by
3150                         // another L shape passing along the same vertical pane, becoming
3151                         // a |- (branch) section instead.
3152                         matrix[l][first_nonspace] = '-';
3153                         matrix[l][first_nonspace-1] = '`';
3154                         int l2 = l - 1;
3155                         // Draw upwards until we hit the parent server, causing possibly
3156                         // other corners (`-) to become branches (|-)
3157                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3158                         {
3159                                 matrix[l2][first_nonspace-1] = '|';
3160                                 l2--;
3161                         }
3162                 }
3163                 // dump the whole lot to the user. This is the easy bit, honest.
3164                 for (int t = 0; t < line; t++)
3165                 {
3166                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
3167                 }
3168                 float avg_users = totusers / totservers;
3169                 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);
3170         WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
3171                 return;
3172         }
3173
3174         int HandleSquit(char** parameters, int pcnt, userrec* user)
3175         {
3176                 TreeServer* s = FindServerMask(parameters[0]);
3177                 if (s)
3178                 {
3179                         if (s == TreeRoot)
3180                         {
3181                                  WriteServ(user->fd,"NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
3182                                 return 1;
3183                         }
3184                         TreeSocket* sock = s->GetSocket();
3185                         if (sock)
3186                         {
3187                                 log(DEBUG,"Splitting server %s",s->GetName().c_str());
3188                                 WriteOpers("*** SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
3189                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
3190                                 Srv->RemoveSocket(sock);
3191                         }
3192                         else
3193                         {
3194                                 WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
3195                         }
3196                 }
3197                 else
3198                 {
3199                          WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
3200                 }
3201                 return 1;
3202         }
3203
3204         int HandleTime(char** parameters, int pcnt, userrec* user)
3205         {
3206                 if ((user->fd > -1) && (pcnt))
3207                 {
3208                         TreeServer* found = FindServerMask(parameters[0]);
3209                         if (found)
3210                         {
3211                                 // we dont' override for local server
3212                                 if (found == TreeRoot)
3213                                         return 0;
3214
3215                                 std::deque<std::string> params;
3216                                 params.push_back(found->GetName());
3217                                 params.push_back(user->nick);
3218                                 DoOneToOne(Srv->GetServerName(),"TIME",params,found->GetName());
3219                         }
3220                         else
3221                         {
3222                                 WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
3223                         }
3224                 }
3225                 return 1;
3226         }
3227
3228         int HandleRemoteWhois(char** parameters, int pcnt, userrec* user)
3229         {
3230                 if ((user->fd > -1) && (pcnt > 1))
3231                 {
3232                         userrec* remote = Srv->FindNick(parameters[1]);
3233                         if ((remote) && (remote->fd < 0))
3234                         {
3235                                 std::deque<std::string> params;
3236                                 params.push_back(parameters[1]);
3237                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
3238                                 return 1;
3239                         }
3240                         else if (!remote)
3241                         {
3242                                 WriteServ(user->fd,"401 %s %s :No such nick/channel",user->nick, parameters[1]);
3243                                 WriteServ(user->fd,"318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
3244                                 return 1;
3245                         }
3246                 }
3247                 return 0;
3248         }
3249
3250         void DoPingChecks(time_t curtime)
3251         {
3252                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
3253                 {
3254                         TreeServer* serv = TreeRoot->GetChild(j);
3255                         TreeSocket* sock = serv->GetSocket();
3256                         if (sock)
3257                         {
3258                                 if (curtime >= serv->NextPingTime())
3259                                 {
3260                                         if (serv->AnsweredLastPing())
3261                                         {
3262                                                 sock->WriteLine(":"+Srv->GetServerName()+" PING "+serv->GetName());
3263                                                 serv->SetNextPingTime(curtime + 120);
3264                                         }
3265                                         else
3266                                         {
3267                                                 // they didnt answer, boot them
3268                                                 WriteOpers("*** Server \002%s\002 pinged out",serv->GetName().c_str());
3269                                                 sock->Squit(serv,"Ping timeout");
3270                                                 Srv->RemoveSocket(sock);
3271                                                 return;
3272                                         }
3273                                 }
3274                         }
3275                 }
3276         }
3277
3278         void AutoConnectServers(time_t curtime)
3279         {
3280                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3281                 {
3282                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
3283                         {
3284                                 log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
3285                                 x->NextConnectTime = curtime + x->AutoConnect;
3286                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3287                                 if (!CheckDupe)
3288                                 {
3289                                         // an autoconnected server is not connected. Check if its time to connect it
3290                                         WriteOpers("*** AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
3291                                         TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name.c_str());
3292                                         if (newsocket->GetFd() > -1)
3293                                         {
3294                                                 Srv->AddSocket(newsocket);
3295                                         }
3296                                         else
3297                                         {
3298                                                 WriteOpers("*** AUTOCONNECT: Error autoconnecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
3299                                                 DELETE(newsocket);
3300                                         }
3301                                 }
3302                         }
3303                 }
3304         }
3305
3306         int HandleVersion(char** parameters, int pcnt, userrec* user)
3307         {
3308                 // we've already checked if pcnt > 0, so this is safe
3309                 TreeServer* found = FindServerMask(parameters[0]);
3310                 if (found)
3311                 {
3312                         std::string Version = found->GetVersion();
3313                         WriteServ(user->fd,"351 %s :%s",user->nick,Version.c_str());
3314                         if (found == TreeRoot)
3315                         {
3316                                 std::stringstream out(Config->data005);
3317                                 std::string token = "";
3318                                 std::string line5 = "";
3319                                 int token_counter = 0;
3320
3321                                 while (!out.eof())
3322                                 {
3323                                         out >> token;
3324                                         line5 = line5 + token + " ";
3325                                         token_counter++;
3326
3327                                         if ((token_counter >= 13) || (out.eof() == true))
3328                                         {
3329                                                 WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
3330                                                 line5 = "";
3331                                                 token_counter = 0;
3332                                         }
3333                                 }
3334                         }
3335                 }
3336                 else
3337                 {
3338                         WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
3339                 }
3340                 return 1;
3341         }
3342
3343         int HandleConnect(char** parameters, int pcnt, userrec* user)
3344         {
3345                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3346                 {
3347                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
3348                         {
3349                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3350                                 if (!CheckDupe)
3351                                 {
3352                                         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);
3353                                         TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name.c_str());
3354                                         if (newsocket->GetFd() > -1)
3355                                         {
3356                                                 Srv->AddSocket(newsocket);
3357                                         }
3358                                         else
3359                                         {
3360                                                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: Error connecting \002%s\002: %s.",user->nick,x->Name.c_str(),strerror(errno));
3361                                                 DELETE(newsocket);
3362                                         }
3363                                         return 1;
3364                                 }
3365                                 else
3366                                 {
3367                                         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());
3368                                         return 1;
3369                                 }
3370                         }
3371                 }
3372                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
3373                 return 1;
3374         }
3375
3376         virtual int OnStats(char statschar, userrec* user)
3377         {
3378                 if (statschar == 'c')
3379                 {
3380                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
3381                         {
3382                                 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');
3383                                 WriteServ(user->fd,"244 %s H * * %s",user->nick,LinkBlocks[i].Name.c_str());
3384                         }
3385                         WriteServ(user->fd,"219 %s %c :End of /STATS report",user->nick,statschar);
3386                         WriteOpers("*** Notice: Stats '%c' requested by %s (%s@%s)",statschar,user->nick,user->ident,user->host);
3387                         return 1;
3388                 }
3389                 return 0;
3390         }
3391
3392         virtual int OnPreCommand(const std::string &command, char **parameters, int pcnt, userrec *user, bool validated)
3393         {
3394                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
3395                 if (!validated)
3396                         return 0;
3397
3398                 if (command == "CONNECT")
3399                 {
3400                         return this->HandleConnect(parameters,pcnt,user);
3401                 }
3402                 else if (command == "SQUIT")
3403                 {
3404                         return this->HandleSquit(parameters,pcnt,user);
3405                 }
3406                 else if (command == "MAP")
3407                 {
3408                         this->HandleMap(parameters,pcnt,user);
3409                         return 1;
3410                 }
3411                 else if ((command == "TIME") && (pcnt > 0))
3412                 {
3413                         return this->HandleTime(parameters,pcnt,user);
3414                 }
3415                 else if (command == "LUSERS")
3416                 {
3417                         this->HandleLusers(parameters,pcnt,user);
3418                         return 1;
3419                 }
3420                 else if (command == "LINKS")
3421                 {
3422                         this->HandleLinks(parameters,pcnt,user);
3423                         return 1;
3424                 }
3425                 else if (command == "WHOIS")
3426                 {
3427                         if (pcnt > 1)
3428                         {
3429                                 // remote whois
3430                                 return this->HandleRemoteWhois(parameters,pcnt,user);
3431                         }
3432                 }
3433                 else if ((command == "VERSION") && (pcnt > 0))
3434                 {
3435                         this->HandleVersion(parameters,pcnt,user);
3436                         return 1;
3437                 }
3438                 else if (Srv->IsValidModuleCommand(command, pcnt, user))
3439                 {
3440                         // this bit of code cleverly routes all module commands
3441                         // to all remote severs *automatically* so that modules
3442                         // can just handle commands locally, without having
3443                         // to have any special provision in place for remote
3444                         // commands and linking protocols.
3445                         std::deque<std::string> params;
3446                         params.clear();
3447                         for (int j = 0; j < pcnt; j++)
3448                         {
3449                                 if (strchr(parameters[j],' '))
3450                                 {
3451                                         params.push_back(":" + std::string(parameters[j]));
3452                                 }
3453                                 else
3454                                 {
3455                                         params.push_back(std::string(parameters[j]));
3456                                 }
3457                         }
3458                         log(DEBUG,"Globally route '%s'",command.c_str());
3459                         DoOneToMany(user->nick,command,params);
3460                 }
3461                 return 0;
3462         }
3463
3464         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
3465         {
3466                 TreeServer* s = FindServer(servername);
3467                 if (s)
3468                 {
3469                         description = s->GetDesc();
3470                 }
3471         }
3472
3473         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
3474         {
3475                 if (source->fd > -1)
3476                 {
3477                         std::deque<std::string> params;
3478                         params.push_back(dest->nick);
3479                         params.push_back(channel->name);
3480                         DoOneToMany(source->nick,"INVITE",params);
3481                 }
3482         }
3483
3484         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
3485         {
3486                 std::deque<std::string> params;
3487                 params.push_back(chan->name);
3488                 params.push_back(":"+topic);
3489                 DoOneToMany(user->nick,"TOPIC",params);
3490         }
3491
3492         virtual void OnWallops(userrec* user, const std::string &text)
3493         {
3494                 if (user->fd > -1)
3495                 {
3496                         std::deque<std::string> params;
3497                         params.push_back(":"+text);
3498                         DoOneToMany(user->nick,"WALLOPS",params);
3499                 }
3500         }
3501
3502         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
3503         {
3504                 if (target_type == TYPE_USER)
3505                 {
3506                         userrec* d = (userrec*)dest;
3507                         if ((d->fd < 0) && (user->fd > -1))
3508                         {
3509                                 std::deque<std::string> params;
3510                                 params.clear();
3511                                 params.push_back(d->nick);
3512                                 params.push_back(":"+text);
3513                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
3514                         }
3515                 }
3516                 else
3517                 {
3518                         if (user->fd > -1)
3519                         {
3520                                 chanrec *c = (chanrec*)dest;
3521                                 std::string cname = c->name;
3522                                 if (status)
3523                                         cname = status + cname;
3524                                 std::deque<TreeServer*> list;
3525                                 GetListOfServersForChannel(c,list);
3526                                 unsigned int ucount = list.size();
3527                                 for (unsigned int i = 0; i < ucount; i++)
3528                                 {
3529                                         TreeSocket* Sock = list[i]->GetSocket();
3530                                         if (Sock)
3531                                                 Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
3532                                 }
3533                         }
3534                 }
3535         }
3536
3537         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
3538         {
3539                 if (target_type == TYPE_USER)
3540                 {
3541                         // route private messages which are targetted at clients only to the server
3542                         // which needs to receive them
3543                         userrec* d = (userrec*)dest;
3544                         if ((d->fd < 0) && (user->fd > -1))
3545                         {
3546                                 std::deque<std::string> params;
3547                                 params.clear();
3548                                 params.push_back(d->nick);
3549                                 params.push_back(":"+text);
3550                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
3551                         }
3552                 }
3553                 else
3554                 {
3555                         if (user->fd > -1)
3556                         {
3557                                 chanrec *c = (chanrec*)dest;
3558                                 std::string cname = c->name;
3559                                 if (status)
3560                                         cname = status + cname;
3561                                 std::deque<TreeServer*> list;
3562                                 GetListOfServersForChannel(c,list);
3563                                 unsigned int ucount = list.size();
3564                                 for (unsigned int i = 0; i < ucount; i++)
3565                                 {
3566                                         TreeSocket* Sock = list[i]->GetSocket();
3567                                         if (Sock)
3568                                                 Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
3569                                 }
3570                         }
3571                 }
3572         }
3573
3574         virtual void OnBackgroundTimer(time_t curtime)
3575         {
3576                 AutoConnectServers(curtime);
3577                 DoPingChecks(curtime);
3578         }
3579
3580         virtual void OnUserJoin(userrec* user, chanrec* channel)
3581         {
3582                 // Only do this for local users
3583                 if (user->fd > -1)
3584                 {
3585                         std::deque<std::string> params;
3586                         params.clear();
3587                         params.push_back(channel->name);
3588
3589                         if (channel->GetUserCounter() > 1)
3590                         {
3591                                 // not the first in the channel
3592                                 DoOneToMany(user->nick,"JOIN",params);
3593                         }
3594                         else
3595                         {
3596                                 // first in the channel, set up their permissions
3597                                 // and the channel TS with FJOIN.
3598                                 char ts[24];
3599                                 snprintf(ts,24,"%lu",(unsigned long)channel->age);
3600                                 params.clear();
3601                                 params.push_back(channel->name);
3602                                 params.push_back(ts);
3603                                 params.push_back("@"+std::string(user->nick));
3604                                 DoOneToMany(Srv->GetServerName(),"FJOIN",params);
3605                         }
3606                 }
3607         }
3608
3609         virtual void OnChangeHost(userrec* user, const std::string &newhost)
3610         {
3611                 // only occurs for local clients
3612                 if (user->registered != 7)
3613                         return;
3614                 std::deque<std::string> params;
3615                 params.push_back(newhost);
3616                 DoOneToMany(user->nick,"FHOST",params);
3617         }
3618
3619         virtual void OnChangeName(userrec* user, const std::string &gecos)
3620         {
3621                 // only occurs for local clients
3622                 if (user->registered != 7)
3623                         return;
3624                 std::deque<std::string> params;
3625                 params.push_back(gecos);
3626                 DoOneToMany(user->nick,"FNAME",params);
3627         }
3628
3629         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
3630         {
3631                 if (user->fd > -1)
3632                 {
3633                         std::deque<std::string> params;
3634                         params.push_back(channel->name);
3635                         if (partmessage != "")
3636                                 params.push_back(":"+partmessage);
3637                         DoOneToMany(user->nick,"PART",params);
3638                 }
3639         }
3640
3641         virtual void OnUserConnect(userrec* user)
3642         {
3643                 char agestr[MAXBUF];
3644                 if (user->fd > -1)
3645                 {
3646                         std::deque<std::string> params;
3647                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
3648                         params.push_back(agestr);
3649                         params.push_back(user->nick);
3650                         params.push_back(user->host);
3651                         params.push_back(user->dhost);
3652                         params.push_back(user->ident);
3653                         params.push_back("+"+std::string(user->FormatModes()));
3654                         params.push_back((char*)inet_ntoa(user->ip4));
3655                         params.push_back(":"+std::string(user->fullname));
3656                         DoOneToMany(Srv->GetServerName(),"NICK",params);
3657
3658                         // User is Local, change needs to be reflected!
3659                         TreeServer* SourceServer = FindServer(user->server);
3660                         if (SourceServer)
3661                         {
3662                                 SourceServer->AddUserCount();
3663                         }
3664
3665                 }
3666         }
3667
3668         virtual void OnUserQuit(userrec* user, const std::string &reason)
3669         {
3670                 if ((user->fd > -1) && (user->registered == 7))
3671                 {
3672                         std::deque<std::string> params;
3673                         params.push_back(":"+reason);
3674                         DoOneToMany(user->nick,"QUIT",params);
3675                 }
3676                 // Regardless, We need to modify the user Counts..
3677                 TreeServer* SourceServer = FindServer(user->server);
3678                 if (SourceServer)
3679                 {
3680                         SourceServer->DelUserCount();
3681                         SourceServer->DelUser(user);
3682                 }
3683
3684         }
3685
3686         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
3687         {
3688                 if (user->fd > -1)
3689                 {
3690                         std::deque<std::string> params;
3691                         params.push_back(user->nick);
3692                         DoOneToMany(oldnick,"NICK",params);
3693                 }
3694         }
3695
3696         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
3697         {
3698                 if ((source) && (source->fd > -1))
3699                 {
3700                         std::deque<std::string> params;
3701                         params.push_back(chan->name);
3702                         params.push_back(user->nick);
3703                         params.push_back(":"+reason);
3704                         DoOneToMany(source->nick,"KICK",params);
3705                 }
3706                 else if (!source)
3707                 {
3708                         std::deque<std::string> params;
3709                         params.push_back(chan->name);
3710                         params.push_back(user->nick);
3711                         params.push_back(":"+reason);
3712                         DoOneToMany(Srv->GetServerName(),"KICK",params);
3713                 }
3714         }
3715
3716         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
3717         {
3718                 std::deque<std::string> params;
3719                 params.push_back(dest->nick);
3720                 params.push_back(":"+reason);
3721                 DoOneToMany(source->nick,"KILL",params);
3722                 /* NOTE: We must remove the user from the servers list here.
3723                  * If we do not, there is a chance the user could hang around
3724                  * in the list if there is a desync for example (this would
3725                  * not be good).
3726                  * Part of the 'random crash on netsplit' tidying up. -Brain
3727                  */
3728                 TreeServer* n = FindServer(dest->server);
3729                 if (n)
3730                 {
3731                         n->DelUser(dest);
3732                 }
3733         }
3734
3735         virtual void OnRehash(const std::string &parameter)
3736         {
3737                 if (parameter != "")
3738                 {
3739                         std::deque<std::string> params;
3740                         params.push_back(parameter);
3741                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
3742                         // check for self
3743                         if (Srv->MatchText(Srv->GetServerName(),parameter))
3744                         {
3745                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
3746                                 Srv->RehashServer();
3747                         }
3748                 }
3749                 ReadConfiguration(false);
3750         }
3751
3752         // note: the protocol does not allow direct umode +o except
3753         // via NICK with 8 params. sending OPERTYPE infers +o modechange
3754         // locally.
3755         virtual void OnOper(userrec* user, const std::string &opertype)
3756         {
3757                 if (user->fd > -1)
3758                 {
3759                         std::deque<std::string> params;
3760                         params.push_back(opertype);
3761                         DoOneToMany(user->nick,"OPERTYPE",params);
3762                 }
3763         }
3764
3765         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
3766         {
3767                 if (source->fd > -1)
3768                 {
3769                         char type[8];
3770                         snprintf(type,8,"%cLINE",linetype);
3771                         std::string stype = type;
3772                         if (adding)
3773                         {
3774                                 char sduration[MAXBUF];
3775                                 snprintf(sduration,MAXBUF,"%ld",duration);
3776                                 std::deque<std::string> params;
3777                                 params.push_back(host);
3778                                 params.push_back(sduration);
3779                                 params.push_back(":"+reason);
3780                                 DoOneToMany(source->nick,stype,params);
3781                         }
3782                         else
3783                         {
3784                                 std::deque<std::string> params;
3785                                 params.push_back(host);
3786                                 DoOneToMany(source->nick,stype,params);
3787                         }
3788                 }
3789         }
3790
3791         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
3792         {
3793                 OnLine(source,hostmask,true,'G',duration,reason);
3794         }
3795
3796         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
3797         {
3798                 OnLine(source,ipmask,true,'Z',duration,reason);
3799         }
3800
3801         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
3802         {
3803                 OnLine(source,nickmask,true,'Q',duration,reason);
3804         }
3805
3806         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
3807         {
3808                 OnLine(source,hostmask,true,'E',duration,reason);
3809         }
3810
3811         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
3812         {
3813                 OnLine(source,hostmask,false,'G',0,"");
3814         }
3815
3816         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
3817         {
3818                 OnLine(source,ipmask,false,'Z',0,"");
3819         }
3820
3821         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
3822         {
3823                 OnLine(source,nickmask,false,'Q',0,"");
3824         }
3825
3826         virtual void OnDelELine(userrec* source, const std::string &hostmask)
3827         {
3828                 OnLine(source,hostmask,false,'E',0,"");
3829         }
3830
3831         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
3832         {
3833                 if ((user->fd > -1) && (user->registered == 7))
3834                 {
3835                         if (target_type == TYPE_USER)
3836                         {
3837                                 userrec* u = (userrec*)dest;
3838                                 std::deque<std::string> params;
3839                                 params.push_back(u->nick);
3840                                 params.push_back(text);
3841                                 DoOneToMany(user->nick,"MODE",params);
3842                         }
3843                         else
3844                         {
3845                                 chanrec* c = (chanrec*)dest;
3846                                 std::deque<std::string> params;
3847                                 params.push_back(c->name);
3848                                 params.push_back(text);
3849                                 DoOneToMany(user->nick,"MODE",params);
3850                         }
3851                 }
3852         }
3853
3854         virtual void OnSetAway(userrec* user)
3855         {
3856                 if (IS_LOCAL(user))
3857                 {
3858                         std::deque<std::string> params;
3859                         params.push_back(":"+std::string(user->awaymsg));
3860                         DoOneToMany(user->nick,"AWAY",params);
3861                 }
3862         }
3863
3864         virtual void OnCancelAway(userrec* user)
3865         {
3866                 if (IS_LOCAL(user))
3867                 {
3868                         std::deque<std::string> params;
3869                         params.clear();
3870                         DoOneToMany(user->nick,"AWAY",params);
3871                 }
3872         }
3873
3874         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
3875         {
3876                 TreeSocket* s = (TreeSocket*)opaque;
3877                 if (target)
3878                 {
3879                         if (target_type == TYPE_USER)
3880                         {
3881                                 userrec* u = (userrec*)target;
3882                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+u->nick+" "+modeline);
3883                         }
3884                         else
3885                         {
3886                                 chanrec* c = (chanrec*)target;
3887                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+modeline);
3888                         }
3889                 }
3890         }
3891
3892         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
3893         {
3894                 TreeSocket* s = (TreeSocket*)opaque;
3895                 if (target)
3896                 {
3897                         if (target_type == TYPE_USER)
3898                         {
3899                                 userrec* u = (userrec*)target;
3900                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA "+u->nick+" "+extname+" :"+extdata);
3901                         }
3902                         else if (target_type == TYPE_OTHER)
3903                         {
3904                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA * "+extname+" :"+extdata);
3905                         }
3906                         else if (target_type == TYPE_CHANNEL)
3907                         {
3908                                 chanrec* c = (chanrec*)target;
3909                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA "+c->name+" "+extname+" :"+extdata);
3910                         }
3911                 }
3912         }
3913
3914         virtual void OnEvent(Event* event)
3915         {
3916                 if (event->GetEventID() == "send_metadata")
3917                 {
3918                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
3919                         if (params->size() < 3)
3920                                 return;
3921                         (*params)[2] = ":" + (*params)[2];
3922                         DoOneToMany(Srv->GetServerName(),"METADATA",*params);
3923                 }
3924         }
3925
3926         virtual ~ModuleSpanningTree()
3927         {
3928         }
3929
3930         virtual Version GetVersion()
3931         {
3932                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
3933         }
3934
3935         void Implements(char* List)
3936         {
3937                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
3938                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
3939                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
3940                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
3941                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
3942                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
3943                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = 1;
3944         }
3945
3946         /* It is IMPORTANT that m_spanningtree is the last module in the chain
3947          * so that any activity it sees is FINAL, e.g. we arent going to send out
3948          * a NICK message before m_cloaking has finished putting the +x on the user,
3949          * etc etc.
3950          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
3951          * the module call queue.
3952          */
3953         Priority Prioritize()
3954         {
3955                 return PRIORITY_LAST;
3956         }
3957 };
3958
3959
3960 class ModuleSpanningTreeFactory : public ModuleFactory
3961 {
3962  public:
3963         ModuleSpanningTreeFactory()
3964         {
3965         }
3966
3967         ~ModuleSpanningTreeFactory()
3968         {
3969         }
3970
3971         virtual Module * CreateModule(Server* Me)
3972         {
3973                 TreeProtocolModule = new ModuleSpanningTree(Me);
3974                 return TreeProtocolModule;
3975         }
3976
3977 };
3978
3979
3980 extern "C" void * init_module( void )
3981 {
3982         return new ModuleSpanningTreeFactory;
3983 }