src/modules/m_spanningtree.cpp

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