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                                 kill_link(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                 WriteServ(user->fd,"NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 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                                 for (n = 2; (q < params.size()) && (n < 64); n++)
1157                                 {
1158                                         log(DEBUG,"Item %d of %d",n, params.size());
1159                                         modelist[n] = params_to_keep[q++].c_str();
1160                                 }
1161
1162                                 if (smode)
1163                                 {
1164                                         log(DEBUG,"Send mode");
1165                                         Srv->SendMode(modelist, n+2, who);
1166                                 }
1167                                 else
1168                                 {
1169                                         log(DEBUG,"Send mode client");
1170                                         Srv->CallCommandHandler("MODE", modelist, n+2, who);
1171                                 }
1172
1173                                 /* HOT POTATO! PASS IT ON! */
1174                                 DoOneToAllButSender(source,"FMODE",params,sourceserv);
1175                         }
1176                 }
1177                 else
1178                 /* U-lined servers always win regardless of their TS */
1179                 if ((TS > ourTS) && (!Srv->IsUlined(source)))
1180                 {
1181                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1182                          * SHOULD accept it, if its clock is right.
1183                          *
1184                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1185                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1186                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1187                          *
1188                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1189                          * writing the code. It took me a while to come up with this solution.
1190                          *
1191                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1192                          */
1193
1194                         std::deque<std::string> newparams;      /* New parameter list we send back */
1195                         newparams.push_back(params[0]);         /* Target, user or channel */
1196                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1197                         newparams.push_back("");                /* This contains the mode string. For now
1198                                                                  * it's empty, we fill it below.
1199                                                                  */
1200
1201                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1202                          * set to avoid a desync here.
1203                          */
1204                         std::string modebounce = "";
1205                         bool adding = true;
1206                         unsigned int t = 3;
1207                         ModeHandler* mh = NULL;
1208                         char cur_change = 1;
1209                         char old_change = 0;
1210                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1211                         {
1212                                 /* Iterate over all mode chars in the sent set */
1213                                 switch (*x)
1214                                 {
1215                                         /* Adding or subtracting modes? */
1216                                         case '-':
1217                                                 adding = false;
1218                                         break;
1219                                         case '+':
1220                                                 adding = true;
1221                                         break;
1222                                         default:
1223                                                 /* Find the mode handler for this mode */
1224                                                 mh = ServerInstance->ModeGrok->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1225
1226                                                 /* Got a mode handler?
1227                                                  * This also prevents us bouncing modes we have no handler for.
1228                                                  */
1229                                                 if (mh)
1230                                                 {
1231                                                         ModePair ret;
1232                                                         std::string p = "";
1233
1234                                                         /* Does the mode require a parameter right now?
1235                                                          * If it does, fetch it if we can
1236                                                          */
1237                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1238                                                                 p = params[t++];
1239
1240                                                         /* Call the ModeSet method to determine if its set with the
1241                                                          * given parameter here or not.
1242                                                          */
1243                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1244
1245                                                         /* XXX: Really. Dont ask.
1246                                                          * Determine from if its set combined with what the current
1247                                                          * 'state' is (adding or not) as to wether we should 'invert'
1248                                                          * or 'reinforce' the mode change
1249                                                          */
1250                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1251
1252                                                         /* Quickly determine if we have 'flipped' from + to -,
1253                                                          * or - to +, to prevent unneccessary +/- chars in the
1254                                                          * output string that waste bandwidth
1255                                                          */
1256                                                         if (cur_change != old_change)
1257                                                                 modebounce += cur_change;
1258                                                         old_change = cur_change;
1259
1260                                                         /* Add the mode character to the output string */
1261                                                         modebounce += mh->GetModeChar();
1262
1263                                                         /* We got a parameter back from ModeHandler::ModeSet,
1264                                                          * are we supposed to be sending one out right now?
1265                                                          */
1266                                                         if (ret.second.length())
1267                                                         {
1268                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1269                                                                         /* Yes we're supposed to be sending out
1270                                                                          * the parameter. Make sure it goes
1271                                                                          */
1272                                                                         newparams.push_back(ret.second);
1273                                                         }
1274
1275                                                 }
1276                                         break;
1277                                 }
1278                         }
1279
1280                         /* Update the parameters for FMODE with the new 'bounced' string */
1281                         newparams[2] = modebounce;
1282                         /* Only send it back the way it came, no need to send it anywhere else */
1283                         DoOneToOne(Srv->GetServerName(),"FMODE",newparams,sourceserv);
1284                         log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1285                 }
1286                 else
1287                 {
1288                         log(DEBUG,"Allow modes, TS lower for sender");
1289                         /* The server was ulined, but something iffy is up with the TS.
1290                          * Sound the alarm bells!
1291                          */
1292                         if ((Srv->IsUlined(sourceserv)) && (TS > ourTS))
1293                         {
1294                                 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());
1295                         }
1296                         /* Allow the mode, route it to either server or user command handling */
1297                         if (smode)
1298                                 Srv->SendMode(modelist,n,who);
1299                         else
1300                                 Srv->CallCommandHandler("MODE", modelist, n, who);
1301
1302                         /* HOT POTATO! PASS IT ON! */
1303                         DoOneToAllButSender(source,"FMODE",params,sourceserv);
1304                 }
1305                 /* Are we supposed to free the userrec? */
1306                 if (smode)
1307                         DELETE(who);
1308
1309                 return true;
1310         }
1311
1312         /* FTOPIC command */
1313         bool ForceTopic(std::string source, std::deque<std::string> &params)
1314         {
1315                 if (params.size() != 4)
1316                         return true;
1317                 time_t ts = atoi(params[1].c_str());
1318                 std::string nsource = source;
1319
1320                 chanrec* c = Srv->FindChannel(params[0]);
1321                 if (c)
1322                 {
1323                         if ((ts >= c->topicset) || (!*c->topic))
1324                         {
1325                                 std::string oldtopic = c->topic;
1326                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1327                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1328                                 c->topicset = ts;
1329                                 /* if the topic text is the same as the current topic,
1330                                  * dont bother to send the TOPIC command out, just silently
1331                                  * update the set time and set nick.
1332                                  */
1333                                 if (oldtopic != params[3])
1334                                 {
1335                                         userrec* user = Srv->FindNick(source);
1336                                         if (!user)
1337                                         {
1338                                                 WriteChannelWithServ(source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
1339                                         }
1340                                         else
1341                                         {
1342                                                 WriteChannel(c, user, "TOPIC %s :%s", c->name, c->topic);
1343                                                 nsource = user->server;
1344                                         }
1345                                         /* all done, send it on its way */
1346                                         params[3] = ":" + params[3];
1347                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
1348                                 }
1349                         }
1350
1351                 }
1352
1353                 return true;
1354         }
1355
1356         /* FJOIN, similar to unreal SJOIN */
1357         bool ForceJoin(std::string source, std::deque<std::string> &params)
1358         {
1359                 if (params.size() < 3)
1360                         return true;
1361
1362                 char first[MAXBUF];
1363                 char modestring[MAXBUF];
1364                 char* mode_users[127];
1365                 memset(&mode_users,0,sizeof(mode_users));
1366                 mode_users[0] = first;
1367                 mode_users[1] = modestring;
1368                 strcpy(first,"+");
1369                 unsigned int modectr = 2;
1370
1371                 userrec* who = NULL;
1372                 std::string channel = params[0];
1373                 time_t TS = atoi(params[1].c_str());
1374                 char* key = "";
1375
1376                 chanrec* chan = Srv->FindChannel(channel);
1377                 if (chan)
1378                 {
1379                         key = chan->key;
1380                 }
1381                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1382
1383                 /* default is a high value, which if we dont have this
1384                  * channel will let the other side apply their modes.
1385                  */
1386                 time_t ourTS = time(NULL)+600;
1387                 chanrec* us = Srv->FindChannel(channel);
1388                 if (us)
1389                 {
1390                         ourTS = us->age;
1391                 }
1392
1393                 log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
1394
1395                 /* do this first, so our mode reversals are correctly received by other servers
1396                  * if there is a TS collision.
1397                  */
1398                 DoOneToAllButSender(source,"FJOIN",params,source);
1399
1400                 for (unsigned int usernum = 2; usernum < params.size(); usernum++)
1401                 {
1402                         /* process one channel at a time, applying modes. */
1403                         char* usr = (char*)params[usernum].c_str();
1404                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1405                          * (is this even possible?) */
1406                         if (usr && *usr)
1407                         {
1408                                 char permissions = *usr;
1409                                 switch (permissions)
1410                                 {
1411                                         case '@':
1412                                                 usr++;
1413                                                 mode_users[modectr++] = usr;
1414                                                 strlcat(modestring,"o",MAXBUF);
1415                                         break;
1416                                         case '%':
1417                                                 usr++;
1418                                                 mode_users[modectr++] = usr;
1419                                                 strlcat(modestring,"h",MAXBUF);
1420                                         break;
1421                                         case '+':
1422                                                 usr++;
1423                                                 mode_users[modectr++] = usr;
1424                                                 strlcat(modestring,"v",MAXBUF);
1425                                         break;
1426                                 }
1427                                 who = Srv->FindNick(usr);
1428                                 if (who)
1429                                 {
1430                                         Srv->JoinUserToChannel(who,channel,key);
1431                                         if (modectr >= (MAXMODES-1))
1432                                         {
1433                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1434                                                  * if there are more than MAXMODES to go.
1435                                                  */
1436                                                 if ((ourTS >= TS) || (Srv->IsUlined(who->server)))
1437                                                 {
1438                                                         /* We also always let u-lined clients win, no matter what the TS value */
1439                                                         log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1440                                                         Srv->SendMode((const char**)mode_users,modectr,who);
1441                                                         if (ourTS != TS)
1442                                                         {
1443                                                                 log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1444                                                                 us->age = TS;
1445                                                         }
1446                                                 }
1447                                                 else
1448                                                 {
1449                                                         log(DEBUG,"Their channel newer than ours, bouncing their modes");
1450                                                         /* bouncy bouncy! */
1451                                                         std::deque<std::string> params;
1452                                                         /* modes are now being UNSET... */
1453                                                         *mode_users[1] = '-';
1454                                                         for (unsigned int x = 0; x < modectr; x++)
1455                                                         {
1456                                                                 if (x == 1)
1457                                                                 {
1458                                                                         params.push_back(ConvToStr(us->age));
1459                                                                 }
1460                                                                 params.push_back(mode_users[x]);
1461                                                         }
1462                                                         // tell everyone to bounce the modes. bad modes, bad!
1463                                                         DoOneToMany(Srv->GetServerName(),"FMODE",params);
1464                                                 }
1465                                                 strcpy(mode_users[1],"+");
1466                                                 modectr = 2;
1467                                         }
1468                                 }
1469                         }
1470                 }
1471                 /* there werent enough modes built up to flush it during FJOIN,
1472                  * or, there are a number left over. flush them out.
1473                  */
1474                 if ((modectr > 2) && (who))
1475                 {
1476                         if (ourTS >= TS)
1477                         {
1478                                 log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1479                                 Srv->SendMode((const char**)mode_users,modectr,who);
1480                                 if (ourTS != TS)
1481                                 {
1482                                         log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1483                                         us->age = TS;
1484                                 }
1485                         }
1486                         else
1487                         {
1488                                 log(DEBUG,"Their channel newer than ours, bouncing their modes");
1489                                 std::deque<std::string> params;
1490                                 *mode_users[1] = '-';
1491                                 for (unsigned int x = 0; x < modectr; x++)
1492                                 {
1493                                         if (x == 1)
1494                                         {
1495                                                 params.push_back(ConvToStr(us->age));
1496                                         }
1497                                         params.push_back(mode_users[x]);
1498                                 }
1499                                 DoOneToMany(Srv->GetServerName(),"FMODE",params);
1500                         }
1501                 }
1502                 return true;
1503         }
1504
1505         bool SyncChannelTS(std::string source, std::deque<std::string> &params)
1506         {
1507                 if (params.size() >= 2)
1508                 {
1509                         chanrec* c = Srv->FindChannel(params[0]);
1510                         if (c)
1511                         {
1512                                 time_t theirTS = atoi(params[1].c_str());
1513                                 time_t ourTS = c->age;
1514                                 if (ourTS >= theirTS)
1515                                 {
1516                                         log(DEBUG,"Updating timestamp for %s, our timestamp was %lu and theirs is %lu",c->name,ourTS,theirTS);
1517                                         c->age = theirTS;
1518                                 }
1519                         }
1520                 }
1521                 DoOneToAllButSender(Srv->GetServerName(),"SYNCTS",params,source);
1522                 return true;
1523         }
1524
1525         /* NICK command */
1526         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1527         {
1528                 if (params.size() < 8)
1529                         return true;
1530                 if (params.size() > 8)
1531                 {
1532                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1533                         return true;
1534                 }
1535                 // NICK age nick host dhost ident +modes ip :gecos
1536                 //       0    1   2     3     4      5   6     7
1537                 time_t age = atoi(params[0].c_str());
1538
1539                 /* This used to have a pretty craq'y loop doing the same thing,
1540                  * now we just let the STL do the hard work (more efficiently)
1541                  */
1542                 params[5] = params[5].substr(params[5].find_first_not_of('+'));
1543
1544                 const char* tempnick = params[1].c_str();
1545                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1546
1547                 user_hash::iterator iter = clientlist.find(tempnick);
1548
1549                 if (iter != clientlist.end())
1550                 {
1551                         // nick collision
1552                         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);
1553                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Nickname collision");
1554                         return true;
1555                 }
1556
1557                 clientlist[tempnick] = new userrec();
1558                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
1559                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX-1);
1560                 strlcpy(clientlist[tempnick]->host, params[2].c_str(),63);
1561                 strlcpy(clientlist[tempnick]->dhost, params[3].c_str(),63);
1562                 clientlist[tempnick]->server = FindServerNamePtr(source.c_str());
1563                 strlcpy(clientlist[tempnick]->ident, params[4].c_str(),IDENTMAX);
1564                 strlcpy(clientlist[tempnick]->fullname, params[7].c_str(),MAXGECOS);
1565                 clientlist[tempnick]->registered = REG_ALL;
1566                 clientlist[tempnick]->signon = age;
1567
1568                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1569                 {
1570                         clientlist[tempnick]->modes[(*v)-65] = 1;
1571                 }
1572
1573                 if (params[6].find_first_of(":") != std::string::npos)
1574                         clientlist[tempnick]->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1575                 else
1576                         clientlist[tempnick]->SetSockAddr(AF_INET, params[6].c_str(), 0);
1577
1578                 WriteOpers("*** Client connecting at %s: %s!%s@%s [%s]",clientlist[tempnick]->server,clientlist[tempnick]->nick,clientlist[tempnick]->ident,clientlist[tempnick]->host, clientlist[tempnick]->GetIPString());
1579
1580                 params[7] = ":" + params[7];
1581                 DoOneToAllButSender(source,"NICK",params,source);
1582
1583                 // Increment the Source Servers User Count..
1584                 TreeServer* SourceServer = FindServer(source);
1585                 if (SourceServer)
1586                 {
1587                         log(DEBUG,"Found source server of %s",clientlist[tempnick]->nick);
1588                         SourceServer->AddUserCount();
1589                 }
1590
1591                 return true;
1592         }
1593
1594         /* Send one or more FJOINs for a channel of users.
1595          * If the length of a single line is more than 480-NICKMAX
1596          * in length, it is split over multiple lines.
1597          */
1598         void SendFJoins(TreeServer* Current, chanrec* c)
1599         {
1600                 log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1601                 char list[MAXBUF];
1602                 std::string individual_halfops = ":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age);
1603
1604                 size_t dlen, curlen;
1605                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
1606                 int numusers = 0;
1607                 char* ptr = list + dlen;
1608
1609                 CUList *ulist = c->GetUsers();
1610                 std::vector<userrec*> specific_halfop;
1611                 std::vector<userrec*> specific_voice;
1612                 std::string modes = "";
1613                 std::string params = "";
1614
1615                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1616                 {
1617                         int x = cflags(i->second,c);
1618                         if ((x & UCMODE_HOP) && (x & UCMODE_OP))
1619                         {
1620                                 specific_halfop.push_back(i->second);
1621                         }
1622                         if (((x & UCMODE_HOP) || (x & UCMODE_OP)) && (x & UCMODE_VOICE))
1623                         {
1624                                 specific_voice.push_back(i->second);
1625                         }
1626
1627                         const char* n = "";
1628                         if (x & UCMODE_OP)
1629                         {
1630                                 n = "@";
1631                         }
1632                         else if (x & UCMODE_HOP)
1633                         {
1634                                 n = "%";
1635                         }
1636                         else if (x & UCMODE_VOICE)
1637                         {
1638                                 n = "+";
1639                         }
1640
1641                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s", n, i->second->nick);
1642
1643                         curlen += ptrlen;
1644                         ptr += ptrlen;
1645
1646                         numusers++;
1647
1648                         if (curlen > (480-NICKMAX))
1649                         {
1650                                 this->WriteLine(list);
1651                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
1652                                 ptr = list + dlen;
1653                                 ptrlen = 0;
1654                                 numusers = 0;
1655                                 for (unsigned int y = 0; y < specific_voice.size(); y++)
1656                                 {
1657                                         modes.append("v");
1658                                         params.append(specific_voice[y]->nick).append(" ");
1659                                         //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +v "+specific_voice[y]->nick);
1660                                 }
1661                                 for (unsigned int y = 0; y < specific_halfop.size(); y++)
1662                                 {
1663                                         modes.append("h");
1664                                         params.append(specific_halfop[y]->nick).append(" ");
1665                                         //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +h "+specific_halfop[y]->nick);
1666                                 }
1667                         }
1668                 }
1669                 if (numusers)
1670                 {
1671                         this->WriteLine(list);
1672                         for (unsigned int y = 0; y < specific_voice.size(); y++)
1673                         {
1674                                 modes.append("v");
1675                                 params.append(specific_voice[y]->nick).append(" ");
1676                                 //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +v "+specific_voice[y]->nick);
1677                         }
1678                         for (unsigned int y = 0; y < specific_halfop.size(); y++)
1679                         {
1680                                 modes.append("h");
1681                                 params.append(specific_halfop[y]->nick).append(" ");
1682                                 //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +h "+specific_halfop[y]->nick);
1683                         }
1684                 }
1685                 //std::string modes = "";
1686                 //std::string params = "";
1687                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1688                 {
1689                         modes.append("b");
1690                         params.append(b->data).append(" ");
1691                 }
1692                 /* XXX: Send each channel mode and its params -- we'll need a method for this in ModeHandler? */
1693                 //FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1694                 this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+chanmodes(c,true)+modes+" "+params);
1695         }
1696
1697         /* Send G, Q, Z and E lines */
1698         void SendXLines(TreeServer* Current)
1699         {
1700                 char data[MAXBUF];
1701                 std::string n = Srv->GetServerName();
1702                 const char* sn = n.c_str();
1703                 int iterations = 0;
1704                 /* Yes, these arent too nice looking, but they get the job done */
1705                 for (std::vector<ZLine>::iterator i = zlines.begin(); i != zlines.end(); i++, iterations++)
1706                 {
1707                         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);
1708                         this->WriteLine(data);
1709                 }
1710                 for (std::vector<QLine>::iterator i = qlines.begin(); i != qlines.end(); i++, iterations++)
1711                 {
1712                         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);
1713                         this->WriteLine(data);
1714                 }
1715                 for (std::vector<GLine>::iterator i = glines.begin(); i != glines.end(); i++, iterations++)
1716                 {
1717                         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);
1718                         this->WriteLine(data);
1719                 }
1720                 for (std::vector<ELine>::iterator i = elines.begin(); i != elines.end(); i++, iterations++)
1721                 {
1722                         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);
1723                         this->WriteLine(data);
1724                 }
1725                 for (std::vector<ZLine>::iterator i = pzlines.begin(); i != pzlines.end(); i++, iterations++)
1726                 {
1727                         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);
1728                         this->WriteLine(data);
1729                 }
1730                 for (std::vector<QLine>::iterator i = pqlines.begin(); i != pqlines.end(); i++, iterations++)
1731                 {
1732                         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);
1733                         this->WriteLine(data);
1734                 }
1735                 for (std::vector<GLine>::iterator i = pglines.begin(); i != pglines.end(); i++, iterations++)
1736                 {
1737                         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);
1738                         this->WriteLine(data);
1739                 }
1740                 for (std::vector<ELine>::iterator i = pelines.begin(); i != pelines.end(); i++, iterations++)
1741                 {
1742                         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);
1743                         this->WriteLine(data);
1744                 }
1745         }
1746
1747         /* Send channel modes and topics */
1748         void SendChannelModes(TreeServer* Current)
1749         {
1750                 char data[MAXBUF];
1751                 std::deque<std::string> list;
1752                 int iterations = 0;
1753                 std::string n = Srv->GetServerName();
1754                 const char* sn = n.c_str();
1755                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++, iterations++)
1756                 {
1757                         SendFJoins(Current, c->second);
1758                         if (*c->second->topic)
1759                         {
1760                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1761                                 this->WriteLine(data);
1762                         }
1763                         FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1764                         list.clear();
1765                         c->second->GetExtList(list);
1766                         for (unsigned int j = 0; j < list.size(); j++)
1767                         {
1768                                 FOREACH_MOD(I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1769                         }
1770                 }
1771         }
1772
1773         /* send all users and their oper state/modes */
1774         void SendUsers(TreeServer* Current)
1775         {
1776                 char data[MAXBUF];
1777                 std::deque<std::string> list;
1778                 int iterations = 0;
1779                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++, iterations++)
1780                 {
1781                         if (u->second->registered == REG_ALL)
1782                         {
1783                                 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);
1784                                 this->WriteLine(data);
1785                                 if (*u->second->oper)
1786                                 {
1787                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1788                                 }
1789                                 if (*u->second->awaymsg)
1790                                 {
1791                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1792                                 }
1793                                 FOREACH_MOD(I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1794                                 list.clear();
1795                                 u->second->GetExtList(list);
1796                                 for (unsigned int j = 0; j < list.size(); j++)
1797                                 {
1798                                         FOREACH_MOD(I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1799                                 }
1800                         }
1801                 }
1802         }
1803
1804         /* This function is called when we want to send a netburst to a local
1805          * server. There is a set order we must do this, because for example
1806          * users require their servers to exist, and channels require their
1807          * users to exist. You get the idea.
1808          */
1809         void DoBurst(TreeServer* s)
1810         {
1811                 /* The calls here to ServerInstance-> yield the processing
1812                  * back to the core so that a large burst is split into at least 6 sections
1813                  * (possibly more)
1814                  */
1815                 std::string burst = "BURST "+ConvToStr(time(NULL));
1816                 std::string endburst = "ENDBURST";
1817                 // Because by the end of the netburst, it  could be gone!
1818                 std::string name = s->GetName();
1819                 Srv->SendOpers("*** Bursting to \2"+name+"\2.");
1820                 this->WriteLine(burst);
1821                 /* send our version string */
1822                 this->WriteLine(":"+Srv->GetServerName()+" VERSION :"+Srv->GetVersion());
1823                 /* Send server tree */
1824                 this->SendServers(TreeRoot,s,1);
1825                 /* Send users and their oper status */
1826                 this->SendUsers(s);
1827                 /* Send everything else (channel modes, xlines etc) */
1828                 this->SendChannelModes(s);
1829                 this->SendXLines(s);
1830                 FOREACH_MOD(I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1831                 this->WriteLine(endburst);
1832                 Srv->SendOpers("*** Finished bursting to \2"+name+"\2.");
1833         }
1834
1835         /* This function is called when we receive data from a remote
1836          * server. We buffer the data in a std::string (it doesnt stay
1837          * there for long), reading using InspSocket::Read() which can
1838          * read up to 16 kilobytes in one operation.
1839          *
1840          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1841          * THE SOCKET OBJECT FOR US.
1842          */
1843         virtual bool OnDataReady()
1844         {
1845                 char* data = this->Read();
1846                 /* Check that the data read is a valid pointer and it has some content */
1847                 if (data && *data)
1848                 {
1849                         this->in_buffer.append(data);
1850                         /* While there is at least one new line in the buffer,
1851                          * do something useful (we hope!) with it.
1852                          */
1853                         while (in_buffer.find("\n") != std::string::npos)
1854                         {
1855                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1856                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1857                                 if (ret.find("\r") != std::string::npos)
1858                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1859                                 /* Process this one, abort if it
1860                                  * didnt return true.
1861                                  */
1862                                 if (this->ctx_in)
1863                                 {
1864                                         char out[1024];
1865                                         char result[1024];
1866                                         memset(result,0,1024);
1867                                         memset(out,0,1024);
1868                                         log(DEBUG,"Original string '%s'",ret.c_str());
1869                                         /* ERROR + CAPAB is still allowed unencryped */
1870                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1871                                         {
1872                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1873                                                 if ((nbytes > 0) && (nbytes < 1024))
1874                                                 {
1875                                                         log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1876                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1877                                                         for (int t = 0; t < nbytes; t++)
1878                                                                 if (result[t] == '\7') result[t] = 0;
1879                                                         ret = result;
1880                                                 }
1881                                         }
1882                                 }
1883                                 if (!this->ProcessLine(ret))
1884                                 {
1885                                         log(DEBUG,"ProcessLine says no!");
1886                                         return false;
1887                                 }
1888                         }
1889                         return true;
1890                 }
1891                 /* EAGAIN returns an empty but non-NULL string, so this
1892                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1893                  */
1894                 return (data && !*data);
1895         }
1896
1897         int WriteLine(std::string line)
1898         {
1899                 log(DEBUG,"OUT: %s",line.c_str());
1900                 if (this->ctx_out)
1901                 {
1902                         char result[10240];
1903                         char result64[10240];
1904                         if (this->keylength)
1905                         {
1906                                 // pad it to the key length
1907                                 int n = this->keylength - (line.length() % this->keylength);
1908                                 if (n)
1909                                 {
1910                                         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);
1911                                         line.append(n,'\7');
1912                                 }
1913                         }
1914                         unsigned int ll = line.length();
1915                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
1916                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
1917                         line = result64;
1918                         //int from64tobits(char *out, const char *in, int maxlen);
1919                 }
1920                 return this->Write(line + "\r\n");
1921         }
1922
1923         /* Handle ERROR command */
1924         bool Error(std::deque<std::string> &params)
1925         {
1926                 if (params.size() < 1)
1927                         return false;
1928                 WriteOpers("*** ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
1929                 /* we will return false to cause the socket to close. */
1930                 return false;
1931         }
1932
1933         bool Stats(std::string prefix, std::deque<std::string> &params)
1934         {
1935                 /* Get the reply to a STATS query if it matches this servername,
1936                  * and send it back as a load of PUSH queries
1937                  */
1938                 if (params.size() > 1)
1939                 {
1940                         if (Srv->MatchText(Srv->GetServerName(), params[1]))
1941                         {
1942                                 /* It's for our server */
1943                                 string_list results;
1944                                 userrec* source = Srv->FindNick(prefix);
1945                                 if (source)
1946                                 {
1947                                         std::deque<std::string> par;
1948                                         par.push_back(prefix);
1949                                         par.push_back("");
1950                                         DoStats(*(params[0].c_str()), source, results);
1951                                         for (size_t i = 0; i < results.size(); i++)
1952                                         {
1953                                                 par[1] = "::" + results[i];
1954                                                 DoOneToOne(Srv->GetServerName(), "PUSH",par, source->server);
1955                                         }
1956                                 }
1957                         }
1958                         else
1959                         {
1960                                 /* Pass it on */
1961                                 userrec* source = Srv->FindNick(prefix);
1962                                 if (source)
1963                                         DoOneToOne(prefix, "STATS", params, params[1]);
1964                         }
1965                 }
1966                 return true;
1967         }
1968
1969
1970         /* Because the core won't let users or even SERVERS set +o,
1971          * we use the OPERTYPE command to do this.
1972          */
1973         bool OperType(std::string prefix, std::deque<std::string> &params)
1974         {
1975                 if (params.size() != 1)
1976                 {
1977                         log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
1978                         return true;
1979                 }
1980                 std::string opertype = params[0];
1981                 userrec* u = Srv->FindNick(prefix);
1982                 if (u)
1983                 {
1984                         u->modes[UM_OPERATOR] = 1;
1985                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
1986                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
1987                 }
1988                 return true;
1989         }
1990
1991         /* Because Andy insists that services-compatible servers must
1992          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
1993          */
1994         bool ForceNick(std::string prefix, std::deque<std::string> &params)
1995         {
1996                 if (params.size() < 3)
1997                         return true;
1998
1999                 userrec* u = Srv->FindNick(params[0]);
2000
2001                 if (u)
2002                 {
2003                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2004                         if (IS_LOCAL(u))
2005                         {
2006                                 std::deque<std::string> par;
2007                                 par.push_back(params[1]);
2008                                 /* This is not required as one is sent in OnUserPostNick below
2009                                  */
2010                                 //DoOneToMany(u->nick,"NICK",par);
2011                                 Srv->ChangeUserNick(u,params[1]);
2012                                 u->age = atoi(params[2].c_str());
2013                         }
2014                 }
2015                 return true;
2016         }
2017
2018         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2019         {
2020                 if (params.size() < 2)
2021                         return true;
2022
2023                 userrec* u = Srv->FindNick(params[0]);
2024
2025                 if (u)
2026                 {
2027                         Srv->JoinUserToChannel(u,params[1],"");
2028                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2029                 }
2030                 return true;
2031         }
2032
2033         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2034         {
2035                 if (params.size() < 1)
2036                         return false;
2037
2038                 std::string servermask = params[0];
2039
2040                 if (Srv->MatchText(Srv->GetServerName(),servermask))
2041                 {
2042                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
2043                         Srv->RehashServer();
2044                         ReadConfiguration(false);
2045                 }
2046                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2047                 return true;
2048         }
2049
2050         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2051         {
2052                 if (params.size() != 2)
2053                         return true;
2054
2055                 std::string nick = params[0];
2056                 userrec* u = Srv->FindNick(prefix);
2057                 userrec* who = Srv->FindNick(nick);
2058
2059                 if (who)
2060                 {
2061                         /* Prepend kill source, if we don't have one */
2062                         std::string sourceserv = prefix;
2063                         if (u)
2064                         {
2065                                 sourceserv = u->server;
2066                         }
2067                         if (*(params[1].c_str()) != '[')
2068                         {
2069                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2070                         }
2071                         std::string reason = params[1];
2072                         params[1] = ":" + params[1];
2073                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2074                         ::Write(who->fd, ":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2075                         Srv->QuitUser(who,reason);
2076                 }
2077                 return true;
2078         }
2079
2080         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2081         {
2082                 if (params.size() < 1)
2083                         return true;
2084
2085                 if (params.size() == 1)
2086                 {
2087                         TreeServer* ServerSource = FindServer(prefix);
2088                         if (ServerSource)
2089                         {
2090                                 ServerSource->SetPingFlag();
2091                         }
2092                 }
2093                 else
2094                 {
2095                         std::string forwardto = params[1];
2096                         if (forwardto == Srv->GetServerName())
2097                         {
2098                                 /*
2099                                  * this is a PONG for us
2100                                  * if the prefix is a user, check theyre local, and if they are,
2101                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2102                                  * Services might want to send these s->s, but we dont need to yet.
2103                                  */
2104                                 userrec* u = Srv->FindNick(prefix);
2105
2106                                 if (u)
2107                                 {
2108                                         WriteServ(u->fd,"PONG %s %s",params[0].c_str(),params[1].c_str());
2109                                 }
2110                         }
2111                         else
2112                         {
2113                                 // not for us, pass it on :)
2114                                 DoOneToOne(prefix,"PONG",params,forwardto);
2115                         }
2116                 }
2117
2118                 return true;
2119         }
2120
2121         bool MetaData(std::string prefix, std::deque<std::string> &params)
2122         {
2123                 if (params.size() < 3)
2124                         return true;
2125
2126                 TreeServer* ServerSource = FindServer(prefix);
2127
2128                 if (ServerSource)
2129                 {
2130                         if (params[0] == "*")
2131                         {
2132                                 FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2133                         }
2134                         else if (*(params[0].c_str()) == '#')
2135                         {
2136                                 chanrec* c = Srv->FindChannel(params[0]);
2137                                 if (c)
2138                                 {
2139                                         FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2140                                 }
2141                         }
2142                         else if (*(params[0].c_str()) != '#')
2143                         {
2144                                 userrec* u = Srv->FindNick(params[0]);
2145                                 if (u)
2146                                 {
2147                                         FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2148                                 }
2149                         }
2150                 }
2151
2152                 params[2] = ":" + params[2];
2153                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2154                 return true;
2155         }
2156
2157         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2158         {
2159                 if (params.size() < 1)
2160                         return true;
2161
2162                 TreeServer* ServerSource = FindServer(prefix);
2163
2164                 if (ServerSource)
2165                 {
2166                         ServerSource->SetVersion(params[0]);
2167                 }
2168                 params[0] = ":" + params[0];
2169                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2170                 return true;
2171         }
2172
2173         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2174         {
2175                 if (params.size() < 1)
2176                         return true;
2177
2178                 userrec* u = Srv->FindNick(prefix);
2179
2180                 if (u)
2181                 {
2182                         Srv->ChangeHost(u,params[0]);
2183                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2184                 }
2185                 return true;
2186         }
2187
2188         bool AddLine(std::string prefix, std::deque<std::string> &params)
2189         {
2190                 if (params.size() < 6)
2191                         return true;
2192
2193                 bool propogate = false;
2194
2195                 switch (*(params[0].c_str()))
2196                 {
2197                         case 'Z':
2198                                 propogate = add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2199                                 zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2200                         break;
2201                         case 'Q':
2202                                 propogate = add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2203                                 qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2204                         break;
2205                         case 'E':
2206                                 propogate = add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2207                                 eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2208                         break;
2209                         case 'G':
2210                                 propogate = add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2211                                 gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2212                         break;
2213                         case 'K':
2214                                 propogate = add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2215                         break;
2216                         default:
2217                                 /* Just in case... */
2218                                 Srv->SendOpers("*** \2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2219                                 propogate = false;
2220                         break;
2221                 }
2222
2223                 /* Send it on its way */
2224                 if (propogate)
2225                 {
2226                         if (atoi(params[4].c_str()))
2227                         {
2228                                 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());
2229                         }
2230                         else
2231                         {
2232                                 WriteOpers("*** %s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
2233                         }
2234                         params[5] = ":" + params[5];
2235                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2236                 }
2237                 if (!this->bursting)
2238                 {
2239                         log(DEBUG,"Applying lines...");
2240                         apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2241                 }
2242                 return true;
2243         }
2244
2245         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2246         {
2247                 if (params.size() < 1)
2248                         return true;
2249
2250                 userrec* u = Srv->FindNick(prefix);
2251
2252                 if (u)
2253                 {
2254                         Srv->ChangeGECOS(u,params[0]);
2255                         params[0] = ":" + params[0];
2256                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2257                 }
2258                 return true;
2259         }
2260
2261         bool Whois(std::string prefix, std::deque<std::string> &params)
2262         {
2263                 if (params.size() < 1)
2264                         return true;
2265
2266                 log(DEBUG,"In IDLE command");
2267                 userrec* u = Srv->FindNick(prefix);
2268
2269                 if (u)
2270                 {
2271                         log(DEBUG,"USER EXISTS: %s",u->nick);
2272                         // an incoming request
2273                         if (params.size() == 1)
2274                         {
2275                                 userrec* x = Srv->FindNick(params[0]);
2276                                 if ((x) && (IS_LOCAL(x)))
2277                                 {
2278                                         userrec* x = Srv->FindNick(params[0]);
2279                                         log(DEBUG,"Got IDLE");
2280                                         char signon[MAXBUF];
2281                                         char idle[MAXBUF];
2282                                         log(DEBUG,"Sending back IDLE 3");
2283                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2284                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2285                                         std::deque<std::string> par;
2286                                         par.push_back(prefix);
2287                                         par.push_back(signon);
2288                                         par.push_back(idle);
2289                                         // ours, we're done, pass it BACK
2290                                         DoOneToOne(params[0],"IDLE",par,u->server);
2291                                 }
2292                                 else
2293                                 {
2294                                         // not ours pass it on
2295                                         DoOneToOne(prefix,"IDLE",params,x->server);
2296                                 }
2297                         }
2298                         else if (params.size() == 3)
2299                         {
2300                                 std::string who_did_the_whois = params[0];
2301                                 userrec* who_to_send_to = Srv->FindNick(who_did_the_whois);
2302                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2303                                 {
2304                                         log(DEBUG,"Got final IDLE");
2305                                         // an incoming reply to a whois we sent out
2306                                         std::string nick_whoised = prefix;
2307                                         unsigned long signon = atoi(params[1].c_str());
2308                                         unsigned long idle = atoi(params[2].c_str());
2309                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2310                                                 do_whois(who_to_send_to,u,signon,idle,nick_whoised.c_str());
2311                                 }
2312                                 else
2313                                 {
2314                                         // not ours, pass it on
2315                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2316                                 }
2317                         }
2318                 }
2319                 return true;
2320         }
2321
2322         bool Push(std::string prefix, std::deque<std::string> &params)
2323         {
2324                 if (params.size() < 2)
2325                         return true;
2326
2327                 userrec* u = Srv->FindNick(params[0]);
2328
2329                 if (!u)
2330                         return true;
2331
2332                 if (IS_LOCAL(u))
2333                 {
2334                         ::Write(u->fd,"%s",params[1].c_str());
2335                 }
2336                 else
2337                 {
2338                         // continue the raw onwards
2339                         params[1] = ":" + params[1];
2340                         DoOneToOne(prefix,"PUSH",params,u->server);
2341                 }
2342                 return true;
2343         }
2344
2345         bool Time(std::string prefix, std::deque<std::string> &params)
2346         {
2347                 // :source.server TIME remote.server sendernick
2348                 // :remote.server TIME source.server sendernick TS
2349                 if (params.size() == 2)
2350                 {
2351                         // someone querying our time?
2352                         if (Srv->GetServerName() == params[0])
2353                         {
2354                                 userrec* u = Srv->FindNick(params[1]);
2355                                 if (u)
2356                                 {
2357                                         char curtime[256];
2358                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2359                                         params.push_back(curtime);
2360                                         params[0] = prefix;
2361                                         DoOneToOne(Srv->GetServerName(),"TIME",params,params[0]);
2362                                 }
2363                         }
2364                         else
2365                         {
2366                                 // not us, pass it on
2367                                 userrec* u = Srv->FindNick(params[1]);
2368                                 if (u)
2369                                         DoOneToOne(prefix,"TIME",params,params[0]);
2370                         }
2371                 }
2372                 else if (params.size() == 3)
2373                 {
2374                         // a response to a previous TIME
2375                         userrec* u = Srv->FindNick(params[1]);
2376                         if ((u) && (IS_LOCAL(u)))
2377                         {
2378                         time_t rawtime = atol(params[2].c_str());
2379                         struct tm * timeinfo;
2380                         timeinfo = localtime(&rawtime);
2381                                 char tms[26];
2382                                 snprintf(tms,26,"%s",asctime(timeinfo));
2383                                 tms[24] = 0;
2384                         WriteServ(u->fd,"391 %s %s :%s",u->nick,prefix.c_str(),tms);
2385                         }
2386                         else
2387                         {
2388                                 if (u)
2389                                         DoOneToOne(prefix,"TIME",params,u->server);
2390                         }
2391                 }
2392                 return true;
2393         }
2394
2395         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2396         {
2397                 if (params.size() < 1)
2398                         return true;
2399
2400                 if (params.size() == 1)
2401                 {
2402                         std::string stufftobounce = params[0];
2403                         this->WriteLine(":"+Srv->GetServerName()+" PONG "+stufftobounce);
2404                         return true;
2405                 }
2406                 else
2407                 {
2408                         std::string forwardto = params[1];
2409                         if (forwardto == Srv->GetServerName())
2410                         {
2411                                 // this is a ping for us, send back PONG to the requesting server
2412                                 params[1] = params[0];
2413                                 params[0] = forwardto;
2414                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2415                         }
2416                         else
2417                         {
2418                                 // not for us, pass it on :)
2419                                 DoOneToOne(prefix,"PING",params,forwardto);
2420                         }
2421                         return true;
2422                 }
2423         }
2424
2425         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2426         {
2427                 if (params.size() < 4)
2428                         return false;
2429
2430                 std::string servername = params[0];
2431                 std::string password = params[1];
2432                 // hopcount is not used for a remote server, we calculate this ourselves
2433                 std::string description = params[3];
2434                 TreeServer* ParentOfThis = FindServer(prefix);
2435
2436                 if (!ParentOfThis)
2437                 {
2438                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2439                         return false;
2440                 }
2441                 TreeServer* CheckDupe = FindServer(servername);
2442                 if (CheckDupe)
2443                 {
2444                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2445                         Srv->SendOpers("*** Server connection from \2"+servername+"\2 denied, already exists");
2446                         return false;
2447                 }
2448                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
2449                 ParentOfThis->AddChild(Node);
2450                 params[3] = ":" + params[3];
2451                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2452                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2453                 return true;
2454         }
2455
2456         bool Outbound_Reply_Server(std::deque<std::string> &params)
2457         {
2458                 if (params.size() < 4)
2459                         return false;
2460
2461                 irc::string servername = params[0].c_str();
2462                 std::string sname = params[0];
2463                 std::string password = params[1];
2464                 int hops = atoi(params[2].c_str());
2465
2466                 if (hops)
2467                 {
2468                         this->WriteLine("ERROR :Server too far away for authentication");
2469                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2470                         return false;
2471                 }
2472                 std::string description = params[3];
2473                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2474                 {
2475                         if ((x->Name == servername) && (x->RecvPass == password))
2476                         {
2477                                 TreeServer* CheckDupe = FindServer(sname);
2478                                 if (CheckDupe)
2479                                 {
2480                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2481                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2482                                         return false;
2483                                 }
2484                                 // Begin the sync here. this kickstarts the
2485                                 // other side, waiting in WAIT_AUTH_2 state,
2486                                 // into starting their burst, as it shows
2487                                 // that we're happy.
2488                                 this->LinkState = CONNECTED;
2489                                 // we should add the details of this server now
2490                                 // to the servers tree, as a child of the root
2491                                 // node.
2492                                 TreeServer* Node = new TreeServer(sname,description,TreeRoot,this);
2493                                 TreeRoot->AddChild(Node);
2494                                 params[3] = ":" + params[3];
2495                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2496                                 this->bursting = true;
2497                                 this->DoBurst(Node);
2498                                 return true;
2499                         }
2500                 }
2501                 this->WriteLine("ERROR :Invalid credentials");
2502                 Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2503                 return false;
2504         }
2505
2506         bool Inbound_Server(std::deque<std::string> &params)
2507         {
2508                 if (params.size() < 4)
2509                         return false;
2510
2511                 irc::string servername = params[0].c_str();
2512                 std::string sname = params[0];
2513                 std::string password = params[1];
2514                 int hops = atoi(params[2].c_str());
2515
2516                 if (hops)
2517                 {
2518                         this->WriteLine("ERROR :Server too far away for authentication");
2519                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2520                         return false;
2521                 }
2522                 std::string description = params[3];
2523                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2524                 {
2525                         if ((x->Name == servername) && (x->RecvPass == password))
2526                         {
2527                                 TreeServer* CheckDupe = FindServer(sname);
2528                                 if (CheckDupe)
2529                                 {
2530                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2531                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2532                                         return false;
2533                                 }
2534                                 /* If the config says this link is encrypted, but the remote side
2535                                  * hasnt bothered to send the AES command before SERVER, then we
2536                                  * boot them off as we MUST have this connection encrypted.
2537                                  */
2538                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2539                                 {
2540                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2541                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2542                                         return false;
2543                                 }
2544                                 Srv->SendOpers("*** Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2545                                 this->InboundServerName = sname;
2546                                 this->InboundDescription = description;
2547                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2548                                 // along with the sendpass from this block.
2549                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
2550                                 // move to the next state, we are now waiting for THEM.
2551                                 this->LinkState = WAIT_AUTH_2;
2552                                 return true;
2553                         }
2554                 }
2555                 this->WriteLine("ERROR :Invalid credentials");
2556                 Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2557                 return false;
2558         }
2559
2560         void Split(std::string line, std::deque<std::string> &n)
2561         {
2562                 n.clear();
2563                 irc::tokenstream tokens(line);
2564                 std::string param;
2565                 while ((param = tokens.GetToken()) != "")
2566                         n.push_back(param);
2567                 return;
2568         }
2569
2570         bool ProcessLine(std::string line)
2571         {
2572                 std::deque<std::string> params;
2573                 irc::string command;
2574                 std::string prefix;
2575
2576                 if (line.empty())
2577                         return true;
2578
2579                 line = line.substr(0, line.find_first_of("\r\n"));
2580
2581                 log(DEBUG,"IN: %s", line.c_str());
2582
2583                 this->Split(line.c_str(),params);
2584
2585                 if ((params[0][0] == ':') && (params.size() > 1))
2586                 {
2587                         prefix = params[0].substr(1);
2588                         params.pop_front();
2589                 }
2590
2591                 command = params[0].c_str();
2592                 params.pop_front();
2593
2594                 if ((!this->ctx_in) && (command == "AES"))
2595                 {
2596                         std::string sserv = params[0];
2597                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2598                         {
2599                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2600                                 {
2601                                         this->InitAES(x->EncryptionKey,sserv);
2602                                 }
2603                         }
2604
2605                         return true;
2606                 }
2607                 else if ((this->ctx_in) && (command == "AES"))
2608                 {
2609                         WriteOpers("*** \2AES\2: Encryption already enabled on this connection yet %s is trying to enable it twice!",params[0].c_str());
2610                 }
2611
2612                 switch (this->LinkState)
2613                 {
2614                         TreeServer* Node;
2615
2616                         case WAIT_AUTH_1:
2617                                 // Waiting for SERVER command from remote server. Server initiating
2618                                 // the connection sends the first SERVER command, listening server
2619                                 // replies with theirs if its happy, then if the initiator is happy,
2620                                 // it starts to send its net sync, which starts the merge, otherwise
2621                                 // it sends an ERROR.
2622                                 if (command == "PASS")
2623                                 {
2624                                         /* Silently ignored */
2625                                 }
2626                                 else if (command == "SERVER")
2627                                 {
2628                                         return this->Inbound_Server(params);
2629                                 }
2630                                 else if (command == "ERROR")
2631                                 {
2632                                         return this->Error(params);
2633                                 }
2634                                 else if (command == "USER")
2635                                 {
2636                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2637                                         return false;
2638                                 }
2639                                 else if (command == "CAPAB")
2640                                 {
2641                                         return this->Capab(params);
2642                                 }
2643                                 else if ((command == "U") || (command == "S"))
2644                                 {
2645                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2646                                         return false;
2647                                 }
2648                                 else
2649                                 {
2650                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2651                                         return false;
2652                                 }
2653                         break;
2654                         case WAIT_AUTH_2:
2655                                 // Waiting for start of other side's netmerge to say they liked our
2656                                 // password.
2657                                 if (command == "SERVER")
2658                                 {
2659                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2660                                         // silently ignore.
2661                                         return true;
2662                                 }
2663                                 else if ((command == "U") || (command == "S"))
2664                                 {
2665                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2666                                         return false;
2667                                 }
2668                                 else if (command == "BURST")
2669                                 {
2670                                         if (params.size())
2671                                         {
2672                                                 /* If a time stamp is provided, try and check syncronization */
2673                                                 time_t THEM = atoi(params[0].c_str());
2674                                                 long delta = THEM-time(NULL);
2675                                                 if ((delta < -600) || (delta > 600))
2676                                                 {
2677                                                         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));
2678                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2679                                                         return false;
2680                                                 }
2681                                                 else if ((delta < -60) || (delta > 60))
2682                                                 {
2683                                                         WriteOpers("*** \2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2684                                                 }
2685                                         }
2686                                         this->LinkState = CONNECTED;
2687                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
2688                                         TreeRoot->AddChild(Node);
2689                                         params.clear();
2690                                         params.push_back(InboundServerName);
2691                                         params.push_back("*");
2692                                         params.push_back("1");
2693                                         params.push_back(":"+InboundDescription);
2694                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2695                                         this->bursting = true;
2696                                         this->DoBurst(Node);
2697                                 }
2698                                 else if (command == "ERROR")
2699                                 {
2700                                         return this->Error(params);
2701                                 }
2702                                 else if (command == "CAPAB")
2703                                 {
2704                                         return this->Capab(params);
2705                                 }
2706
2707                         break;
2708                         case LISTENER:
2709                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2710                                 return false;
2711                         break;
2712                         case CONNECTING:
2713                                 if (command == "SERVER")
2714                                 {
2715                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2716                                         // has just sent us their credentials. If we get this far, theyre
2717                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2718                                         // if we're happy with this, we should send our netburst which
2719                                         // kickstarts the merge.
2720                                         return this->Outbound_Reply_Server(params);
2721                                 }
2722                                 else if (command == "ERROR")
2723                                 {
2724                                         return this->Error(params);
2725                                 }
2726                         break;
2727                         case CONNECTED:
2728                                 // This is the 'authenticated' state, when all passwords
2729                                 // have been exchanged and anything past this point is taken
2730                                 // as gospel.
2731
2732                                 if (prefix != "")
2733                                 {
2734                                         std::string direction = prefix;
2735                                         userrec* t = Srv->FindNick(prefix);
2736                                         if (t)
2737                                         {
2738                                                 direction = t->server;
2739                                         }
2740                                         TreeServer* route_back_again = BestRouteTo(direction);
2741                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2742                                         {
2743                                                 if (route_back_again)
2744                                                         log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2745                                                 return true;
2746                                         }
2747
2748                                         /* Fix by brain:
2749                                          * When there is activity on the socket, reset the ping counter so
2750                                          * that we're not wasting bandwidth pinging an active server.
2751                                          */
2752                                         route_back_again->SetNextPingTime(time(NULL) + 120);
2753                                         route_back_again->SetPingFlag();
2754                                 }
2755
2756                                 if (command == "SVSMODE")
2757                                 {
2758                                         /* Services expects us to implement
2759                                          * SVSMODE. In inspircd its the same as
2760                                          * MODE anyway.
2761                                          */
2762                                         command = "MODE";
2763                                 }
2764                                 std::string target = "";
2765                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
2766                                  * working with std::string here.
2767                                  */
2768                                 if ((command == "NICK") && (params.size() > 1))
2769                                 {
2770                                         return this->IntroduceClient(prefix,params);
2771                                 }
2772                                 else if (command == "FJOIN")
2773                                 {
2774                                         return this->ForceJoin(prefix,params);
2775                                 }
2776                                 else if (command == "STATS")
2777                                 {
2778                                         return this->Stats(prefix, params);
2779                                 }
2780                                 else if (command == "SERVER")
2781                                 {
2782                                         return this->RemoteServer(prefix,params);
2783                                 }
2784                                 else if (command == "ERROR")
2785                                 {
2786                                         return this->Error(params);
2787                                 }
2788                                 else if (command == "OPERTYPE")
2789                                 {
2790                                         return this->OperType(prefix,params);
2791                                 }
2792                                 else if (command == "FMODE")
2793                                 {
2794                                         return this->ForceMode(prefix,params);
2795                                 }
2796                                 else if (command == "KILL")
2797                                 {
2798                                         return this->RemoteKill(prefix,params);
2799                                 }
2800                                 else if (command == "FTOPIC")
2801                                 {
2802                                         return this->ForceTopic(prefix,params);
2803                                 }
2804                                 else if (command == "REHASH")
2805                                 {
2806                                         return this->RemoteRehash(prefix,params);
2807                                 }
2808                                 else if (command == "METADATA")
2809                                 {
2810                                         return this->MetaData(prefix,params);
2811                                 }
2812                                 else if (command == "PING")
2813                                 {
2814                                         /*
2815                                          * We just got a ping from a server that's bursting.
2816                                          * This can't be right, so set them to not bursting, and
2817                                          * apply their lines.
2818                                          */
2819                                         if (this->bursting)
2820                                         {
2821                                                 this->bursting = false;
2822                                                 apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2823                                         }
2824                                         if (prefix == "")
2825                                         {
2826                                                 prefix = this->GetName();
2827                                         }
2828                                         return this->LocalPing(prefix,params);
2829                                 }
2830                                 else if (command == "PONG")
2831                                 {
2832                                         /*
2833                                          * We just got a pong from a server that's bursting.
2834                                          * This can't be right, so set them to not bursting, and
2835                                          * apply their lines.
2836                                          */
2837                                         if (this->bursting)
2838                                         {
2839                                                 this->bursting = false;
2840                                                 apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2841                                         }
2842                                         if (prefix == "")
2843                                         {
2844                                                 prefix = this->GetName();
2845                                         }
2846                                         return this->LocalPong(prefix,params);
2847                                 }
2848                                 else if (command == "VERSION")
2849                                 {
2850                                         return this->ServerVersion(prefix,params);
2851                                 }
2852                                 else if (command == "FHOST")
2853                                 {
2854                                         return this->ChangeHost(prefix,params);
2855                                 }
2856                                 else if (command == "FNAME")
2857                                 {
2858                                         return this->ChangeName(prefix,params);
2859                                 }
2860                                 else if (command == "ADDLINE")
2861                                 {
2862                                         return this->AddLine(prefix,params);
2863                                 }
2864                                 else if (command == "SVSNICK")
2865                                 {
2866                                         if (prefix == "")
2867                                         {
2868                                                 prefix = this->GetName();
2869                                         }
2870                                         return this->ForceNick(prefix,params);
2871                                 }
2872                                 else if (command == "IDLE")
2873                                 {
2874                                         return this->Whois(prefix,params);
2875                                 }
2876                                 else if (command == "PUSH")
2877                                 {
2878                                         return this->Push(prefix,params);
2879                                 }
2880                                 else if (command == "TIME")
2881                                 {
2882                                         return this->Time(prefix,params);
2883                                 }
2884                                 else if ((command == "KICK") && (IsServer(prefix)))
2885                                 {
2886                                         std::string sourceserv = this->myhost;
2887                                         if (params.size() == 3)
2888                                         {
2889                                                 userrec* user = Srv->FindNick(params[1]);
2890                                                 chanrec* chan = Srv->FindChannel(params[0]);
2891                                                 if (user && chan)
2892                                                 {
2893                                                         server_kick_channel(user,chan,(char*)params[2].c_str(),false);
2894                                                 }
2895                                         }
2896                                         if (this->InboundServerName != "")
2897                                         {
2898                                                 sourceserv = this->InboundServerName;
2899                                         }
2900                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2901                                 }
2902                                 else if (command == "SVSJOIN")
2903                                 {
2904                                         if (prefix == "")
2905                                         {
2906                                                 prefix = this->GetName();
2907                                         }
2908                                         return this->ServiceJoin(prefix,params);
2909                                 }
2910                                 else if (command == "SQUIT")
2911                                 {
2912                                         if (params.size() == 2)
2913                                         {
2914                                                 this->Squit(FindServer(params[0]),params[1]);
2915                                         }
2916                                         return true;
2917                                 }
2918                                 else if (command == "ENDBURST")
2919                                 {
2920                                         this->bursting = false;
2921                                         apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2922                                         std::string sourceserv = this->myhost;
2923                                         if (this->InboundServerName != "")
2924                                         {
2925                                                 sourceserv = this->InboundServerName;
2926                                         }
2927                                         WriteOpers("*** Received end of netburst from \2%s\2",sourceserv.c_str());
2928                                         return true;
2929                                 }
2930                                 else
2931                                 {
2932                                         // not a special inter-server command.
2933                                         // Emulate the actual user doing the command,
2934                                         // this saves us having a huge ugly parser.
2935                                         userrec* who = Srv->FindNick(prefix);
2936                                         std::string sourceserv = this->myhost;
2937                                         if (this->InboundServerName != "")
2938                                         {
2939                                                 sourceserv = this->InboundServerName;
2940                                         }
2941                                         if (who)
2942                                         {
2943                                                 if ((command == "NICK") && (params.size() > 0))
2944                                                 {
2945                                                         /* On nick messages, check that the nick doesnt
2946                                                          * already exist here. If it does, kill their copy,
2947                                                          * and our copy.
2948                                                          */
2949                                                         userrec* x = Srv->FindNick(params[0]);
2950                                                         if ((x) && (x != who))
2951                                                         {
2952                                                                 std::deque<std::string> p;
2953                                                                 p.push_back(params[0]);
2954                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
2955                                                                 DoOneToMany(Srv->GetServerName(),"KILL",p);
2956                                                                 p.clear();
2957                                                                 p.push_back(prefix);
2958                                                                 p.push_back("Nickname collision");
2959                                                                 DoOneToMany(Srv->GetServerName(),"KILL",p);
2960                                                                 Srv->QuitUser(x,"Nickname collision ("+prefix+" -> "+params[0]+")");
2961                                                                 userrec* y = Srv->FindNick(prefix);
2962                                                                 if (y)
2963                                                                 {
2964                                                                         Srv->QuitUser(y,"Nickname collision");
2965                                                                 }
2966                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2967                                                         }
2968                                                 }
2969                                                 // its a user
2970                                                 target = who->server;
2971                                                 const char* strparams[127];
2972                                                 for (unsigned int q = 0; q < params.size(); q++)
2973                                                 {
2974                                                         strparams[q] = params[q].c_str();
2975                                                 }
2976                                                 if (!Srv->CallCommandHandler(command.c_str(), strparams, params.size(), who))
2977                                                 {
2978                                                         this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
2979                                                         return false;
2980                                                 }
2981                                         }
2982                                         else
2983                                         {
2984                                                 // its not a user. Its either a server, or somethings screwed up.
2985                                                 if (IsServer(prefix))
2986                                                 {
2987                                                         target = Srv->GetServerName();
2988                                                 }
2989                                                 else
2990                                                 {
2991                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
2992                                                         return true;
2993                                                 }
2994                                         }
2995                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2996
2997                                 }
2998                                 return true;
2999                         break;
3000                 }
3001                 return true;
3002         }
3003
3004         virtual std::string GetName()
3005         {
3006                 std::string sourceserv = this->myhost;
3007                 if (this->InboundServerName != "")
3008                 {
3009                         sourceserv = this->InboundServerName;
3010                 }
3011                 return sourceserv;
3012         }
3013
3014         virtual void OnTimeout()
3015         {
3016                 if (this->LinkState == CONNECTING)
3017                 {
3018                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
3019                 }
3020         }
3021
3022         virtual void OnClose()
3023         {
3024                 // Connection closed.
3025                 // If the connection is fully up (state CONNECTED)
3026                 // then propogate a netsplit to all peers.
3027                 std::string quitserver = this->myhost;
3028                 if (this->InboundServerName != "")
3029                 {
3030                         quitserver = this->InboundServerName;
3031                 }
3032                 TreeServer* s = FindServer(quitserver);
3033                 if (s)
3034                 {
3035                         Squit(s,"Remote host closed the connection");
3036                 }
3037                 WriteOpers("Server '\2%s\2' closed the connection.",quitserver.c_str());
3038         }
3039
3040         virtual int OnIncomingConnection(int newsock, char* ip)
3041         {
3042                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3043                  * or discovering if this port is the server port, we don't allow connections from any
3044                  * IPs for which we don't have a link block.
3045                  */
3046                 bool found = false;
3047                 vector<Link>::iterator i;
3048                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3049                 if (!found)
3050                 {
3051                         WriteOpers("Server connection from %s denied (no link blocks with that IP address)", ip);
3052                         close(newsock);
3053                         return false;
3054                 }
3055                 TreeSocket* s = new TreeSocket(newsock, ip);
3056                 Srv->AddSocket(s);
3057                 return true;
3058         }
3059 };
3060
3061 /** This class is used to resolve server hostnames during /connect and autoconnect.
3062  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3063  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3064  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3065  * will have an IP address which we can then use to continue our connection.
3066  */
3067 class ServernameResolver : public Resolver
3068 {
3069  private:
3070         /** A copy of the Link tag info for what we're connecting to.
3071          * We take a copy, rather than using a pointer, just in case the
3072          * admin takes the tag away and rehashes while the domain is resolving.
3073          */
3074         Link MyLink;
3075  public:
3076         ServernameResolver(const std::string &hostname, Link x) : Resolver(hostname, DNS_QUERY_FORWARD), MyLink(x)
3077         {
3078                 /* Nothing in here, folks */
3079         }
3080
3081         void OnLookupComplete(const std::string &result)
3082         {
3083                 /* Initiate the connection, now that we have an IP to use.
3084                  * Passing a hostname directly to InspSocket causes it to
3085                  * just bail and set its FD to -1.
3086                  */
3087                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3088                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3089                 {
3090                         TreeSocket* newsocket = new TreeSocket(result,MyLink.Port,false,10,MyLink.Name.c_str());
3091                         if (newsocket->GetFd() > -1)
3092                         {
3093                                 /* We're all OK */
3094                                 Srv->AddSocket(newsocket);
3095                         }
3096                         else
3097                         {
3098                                 /* Something barfed, show the opers */
3099                                 WriteOpers("*** CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3100                                 delete newsocket;
3101                         }
3102                 }
3103         }
3104
3105         void OnError(ResolverError e, const std::string &errormessage)
3106         {
3107                 /* Ooops! */
3108                 WriteOpers("*** CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3109         }
3110 };
3111
3112 class SecurityIPResolver : public Resolver
3113 {
3114  private:
3115         Link MyLink;
3116  public:
3117         SecurityIPResolver(const std::string &hostname, Link x) : Resolver(hostname, DNS_QUERY_FORWARD), MyLink(x)
3118         {
3119         }
3120
3121         void OnLookupComplete(const std::string &result)
3122         {
3123                 log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3124                 ValidIPs.push_back(result);
3125         }
3126
3127         void OnError(ResolverError e, const std::string &errormessage)
3128         {
3129                 log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3130         }
3131 };
3132
3133 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3134 {
3135         for (unsigned int c = 0; c < list.size(); c++)
3136         {
3137                 if (list[c] == server)
3138                 {
3139                         return;
3140                 }
3141         }
3142         list.push_back(server);
3143 }
3144
3145 // returns a list of DIRECT servernames for a specific channel
3146 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3147 {
3148         CUList *ulist = c->GetUsers();
3149         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3150         {
3151                 if (i->second->fd < 0)
3152                 {
3153                         TreeServer* best = BestRouteTo(i->second->server);
3154                         if (best)
3155                                 AddThisServer(best,list);
3156                 }
3157         }
3158         return;
3159 }
3160
3161 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3162 {
3163         TreeServer* omitroute = BestRouteTo(omit);
3164         if ((command == "NOTICE") || (command == "PRIVMSG"))
3165         {
3166                 if (params.size() >= 2)
3167                 {
3168                         /* Prefixes */
3169                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3170                         {
3171                                 params[0] = params[0].substr(1, params[0].length()-1);
3172                         }
3173                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3174                         {
3175                                 // special routing for private messages/notices
3176                                 userrec* d = Srv->FindNick(params[0]);
3177                                 if (d)
3178                                 {
3179                                         std::deque<std::string> par;
3180                                         par.push_back(params[0]);
3181                                         par.push_back(":"+params[1]);
3182                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3183                                         return true;
3184                                 }
3185                         }
3186                         else if (*(params[0].c_str()) == '$')
3187                         {
3188                                 std::deque<std::string> par;
3189                                 par.push_back(params[0]);
3190                                 par.push_back(":"+params[1]);
3191                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3192                                 return true;
3193                         }
3194                         else
3195                         {
3196                                 log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3197                                 chanrec* c = Srv->FindChannel(params[0]);
3198                                 if (c)
3199                                 {
3200                                         std::deque<TreeServer*> list;
3201                                         GetListOfServersForChannel(c,list);
3202                                         log(DEBUG,"Got a list of %d servers",list.size());
3203                                         unsigned int lsize = list.size();
3204                                         for (unsigned int i = 0; i < lsize; i++)
3205                                         {
3206                                                 TreeSocket* Sock = list[i]->GetSocket();
3207                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3208                                                 {
3209                                                         log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3210                                                         Sock->WriteLine(data);
3211                                                 }
3212                                         }
3213                                         return true;
3214                                 }
3215                         }
3216                 }
3217         }
3218         unsigned int items = TreeRoot->ChildCount();
3219         for (unsigned int x = 0; x < items; x++)
3220         {
3221                 TreeServer* Route = TreeRoot->GetChild(x);
3222                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3223                 {
3224                         TreeSocket* Sock = Route->GetSocket();
3225                         Sock->WriteLine(data);
3226                 }
3227         }
3228         return true;
3229 }
3230
3231 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3232 {
3233         TreeServer* omitroute = BestRouteTo(omit);
3234         std::string FullLine = ":" + prefix + " " + command;
3235         unsigned int words = params.size();
3236         for (unsigned int x = 0; x < words; x++)
3237         {
3238                 FullLine = FullLine + " " + params[x];
3239         }
3240         unsigned int items = TreeRoot->ChildCount();
3241         for (unsigned int x = 0; x < items; x++)
3242         {
3243                 TreeServer* Route = TreeRoot->GetChild(x);
3244                 // Send the line IF:
3245                 // The route has a socket (its a direct connection)
3246                 // The route isnt the one to be omitted
3247                 // The route isnt the path to the one to be omitted
3248                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3249                 {
3250                         TreeSocket* Sock = Route->GetSocket();
3251                         Sock->WriteLine(FullLine);
3252                 }
3253         }
3254         return true;
3255 }
3256
3257 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3258 {
3259         std::string FullLine = ":" + prefix + " " + command;
3260         unsigned int words = params.size();
3261         for (unsigned int x = 0; x < words; x++)
3262         {
3263                 FullLine = FullLine + " " + params[x];
3264         }
3265         unsigned int items = TreeRoot->ChildCount();
3266         for (unsigned int x = 0; x < items; x++)
3267         {
3268                 TreeServer* Route = TreeRoot->GetChild(x);
3269                 if (Route->GetSocket())
3270                 {
3271                         TreeSocket* Sock = Route->GetSocket();
3272                         Sock->WriteLine(FullLine);
3273                 }
3274         }
3275         return true;
3276 }
3277
3278 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3279 {
3280         TreeServer* Route = BestRouteTo(target);
3281         if (Route)
3282         {
3283                 std::string FullLine = ":" + prefix + " " + command;
3284                 unsigned int words = params.size();
3285                 for (unsigned int x = 0; x < words; x++)
3286                 {
3287                         FullLine = FullLine + " " + params[x];
3288                 }
3289                 if (Route->GetSocket())
3290                 {
3291                         TreeSocket* Sock = Route->GetSocket();
3292                         Sock->WriteLine(FullLine);
3293                 }
3294                 return true;
3295         }
3296         else
3297         {
3298                 return true;
3299         }
3300 }
3301
3302 std::vector<TreeSocket*> Bindings;
3303
3304 void ReadConfiguration(bool rebind)
3305 {
3306         Conf = new ConfigReader;
3307         if (rebind)
3308         {
3309                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3310                 {
3311                         std::string Type = Conf->ReadValue("bind","type",j);
3312                         std::string IP = Conf->ReadValue("bind","address",j);
3313                         long Port = Conf->ReadInteger("bind","port",j,true);
3314                         if (Type == "servers")
3315                         {
3316                                 if (IP == "*")
3317                                 {
3318                                         IP = "";
3319                                 }
3320                                 TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
3321                                 if (listener->GetState() == I_LISTENING)
3322                                 {
3323                                         Srv->AddSocket(listener);
3324                                         Bindings.push_back(listener);
3325                                 }
3326                                 else
3327                                 {
3328                                         log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3329                                         listener->Close();
3330                                         DELETE(listener);
3331                                 }
3332                         }
3333                 }
3334         }
3335         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3336         HideULines = Conf->ReadFlag("options","hideulines",0);
3337         LinkBlocks.clear();
3338         ValidIPs.clear();
3339         for (int j =0; j < Conf->Enumerate("link"); j++)
3340         {
3341                 Link L;
3342                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3343                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3344                 L.Port = Conf->ReadInteger("link","port",j,true);
3345                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3346                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3347                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3348                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3349                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3350                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3351                 /* Bugfix by brain, do not allow people to enter bad configurations */
3352                 if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3353                 {
3354                         ValidIPs.push_back(L.IPAddr);
3355
3356                         /* Needs resolving */
3357                         insp_inaddr binip;
3358                         if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3359                         {
3360                                 try
3361                                 {
3362                                         SecurityIPResolver* sr = new SecurityIPResolver(L.IPAddr, L);
3363                                         Srv->AddResolver(sr);
3364                                 }
3365                                 catch (ModuleException& e)
3366                                 {
3367                                         log(DEBUG,"Error in resolver: %s",e.GetReason());
3368                                 }
3369                         }
3370
3371                         LinkBlocks.push_back(L);
3372                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3373                 }
3374                 else
3375                 {
3376                         if (L.IPAddr == "")
3377                         {
3378                                 log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3379                         }
3380                         else if (L.RecvPass == "")
3381                         {
3382                                 log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3383                         }
3384                         else if (L.SendPass == "")
3385                         {
3386                                 log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3387                         }
3388                         else if (L.Name == "")
3389                         {
3390                                 log(DEFAULT,"Invalid configuration, link tag without a name!");
3391                         }
3392                         else if (!L.Port)
3393                         {
3394                                 log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3395                         }
3396                 }
3397         }
3398         DELETE(Conf);
3399 }
3400
3401
3402 class ModuleSpanningTree : public Module
3403 {
3404         std::vector<TreeSocket*> Bindings;
3405         int line;
3406         int NumServers;
3407         unsigned int max_local;
3408         unsigned int max_global;
3409         cmd_rconnect* command_rconnect;
3410
3411  public:
3412
3413         ModuleSpanningTree(Server* Me)
3414                 : Module::Module(Me), max_local(0), max_global(0)
3415         {
3416                 Srv = Me;
3417                 Bindings.clear();
3418
3419                 // Create the root of the tree
3420                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
3421
3422                 ReadConfiguration(true);
3423
3424                 command_rconnect = new cmd_rconnect(this);
3425                 Srv->AddCommand(command_rconnect);
3426         }
3427
3428         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3429         {
3430                 std::string Parent = TreeRoot->GetName();
3431                 if (Current->GetParent())
3432                 {
3433                         Parent = Current->GetParent()->GetName();
3434                 }
3435                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3436                 {
3437                         if ((HideULines) && (Srv->IsUlined(Current->GetChild(q)->GetName())))
3438                         {
3439                                 if (*user->oper)
3440                                 {
3441                                          ShowLinks(Current->GetChild(q),user,hops+1);
3442                                 }
3443                         }
3444                         else
3445                         {
3446                                 ShowLinks(Current->GetChild(q),user,hops+1);
3447                         }
3448                 }
3449                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3450                 if ((HideULines) && (Srv->IsUlined(Current->GetName())) && (!*user->oper))
3451                         return;
3452                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),(FlatLinks && (!*user->oper)) ? Srv->GetServerName().c_str() : Parent.c_str(),(FlatLinks && (!*user->oper)) ? 0 : hops,Current->GetDesc().c_str());
3453         }
3454
3455         int CountLocalServs()
3456         {
3457                 return TreeRoot->ChildCount();
3458         }
3459
3460         int CountServs()
3461         {
3462                 return serverlist.size();
3463         }
3464
3465         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3466         {
3467                 ShowLinks(TreeRoot,user,0);
3468                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
3469                 return;
3470         }
3471
3472         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3473         {
3474                 unsigned int n_users = usercnt();
3475
3476                 /* Only update these when someone wants to see them, more efficient */
3477                 if ((unsigned int)local_count() > max_local)
3478                         max_local = local_count();
3479                 if (n_users > max_global)
3480                         max_global = n_users;
3481
3482                 WriteServ(user->fd,"251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-usercount_invisible(),usercount_invisible(),this->CountServs());
3483                 if (usercount_opers())
3484                         WriteServ(user->fd,"252 %s %d :operator(s) online",user->nick,usercount_opers());
3485                 if (usercount_unknown())
3486                         WriteServ(user->fd,"253 %s %d :unknown connections",user->nick,usercount_unknown());
3487                 if (chancount())
3488                         WriteServ(user->fd,"254 %s %d :channels formed",user->nick,chancount());
3489                 WriteServ(user->fd,"254 %s :I have %d clients and %d servers",user->nick,local_count(),this->CountLocalServs());
3490                 WriteServ(user->fd,"265 %s :Current Local Users: %d  Max: %d",user->nick,local_count(),max_local);
3491                 WriteServ(user->fd,"266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3492                 return;
3493         }
3494
3495         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3496
3497         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3498         {
3499                 if (line < 128)
3500                 {
3501                         for (int t = 0; t < depth; t++)
3502                         {
3503                                 matrix[line][t] = ' ';
3504                         }
3505
3506                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3507                         // a 'Spacer' String to compensate.
3508                         char spacer[40];
3509
3510                         memset(spacer,' ',40);
3511                         if ((40 - Current->GetName().length() - depth) > 1) {
3512                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3513                         }
3514                         else
3515                         {
3516                                 spacer[5] = '\0';
3517                         }
3518
3519                         float percent;
3520                         char text[80];
3521                         if (clientlist.size() == 0) {
3522                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3523                                 percent = 0;
3524                         }
3525                         else
3526                         {
3527                                 percent = ((float)Current->GetUserCount() / (float)clientlist.size()) * 100;
3528                         }
3529                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3530                         totusers += Current->GetUserCount();
3531                         totservers++;
3532                         strlcpy(&matrix[line][depth],text,80);
3533                         line++;
3534                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3535                         {
3536                                 if ((HideULines) && (Srv->IsUlined(Current->GetChild(q)->GetName())))
3537                                 {
3538                                         if (*user->oper)
3539                                         {
3540                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3541                                         }
3542                                 }
3543                                 else
3544                                 {
3545                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3546                                 }
3547                         }
3548                 }
3549         }
3550
3551         int HandleStats(const char** parameters, int pcnt, userrec* user)
3552         {
3553                 if (pcnt > 1)
3554                 {
3555                         /* Remote STATS, the server is within the 2nd parameter */
3556                         std::deque<std::string> params;
3557                         params.push_back(parameters[0]);
3558                         params.push_back(parameters[1]);
3559                         /* Send it out remotely, generate no reply yet */
3560                         TreeServer* s = FindServerMask(parameters[1]);
3561                         if (s)
3562                         {
3563                                 params[1] = s->GetName();
3564                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
3565                         }
3566                         return 1;
3567                 }
3568                 return 0;
3569         }
3570
3571         // Ok, prepare to be confused.
3572         // After much mulling over how to approach this, it struck me that
3573         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3574         // keeping track of a ton of ascii characters, and line by line
3575         // under recursion working out where to place them using multiplications
3576         // and divisons, we instead render the map onto a backplane of characters
3577         // (a character matrix), then draw the branches as a series of "L" shapes
3578         // from the nodes. This is not only friendlier on CPU it uses less stack.
3579
3580         void HandleMap(const char** parameters, int pcnt, userrec* user)
3581         {
3582                 // This array represents a virtual screen which we will
3583                 // "scratch" draw to, as the console device of an irc
3584                 // client does not provide for a proper terminal.
3585                 float totusers = 0;
3586                 float totservers = 0;
3587                 char matrix[128][80];
3588                 for (unsigned int t = 0; t < 128; t++)
3589                 {
3590                         matrix[t][0] = '\0';
3591                 }
3592                 line = 0;
3593                 // The only recursive bit is called here.
3594                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3595                 // Process each line one by one. The algorithm has a limit of
3596                 // 128 servers (which is far more than a spanning tree should have
3597                 // anyway, so we're ok). This limit can be raised simply by making
3598                 // the character matrix deeper, 128 rows taking 10k of memory.
3599                 for (int l = 1; l < line; l++)
3600                 {
3601                         // scan across the line looking for the start of the
3602                         // servername (the recursive part of the algorithm has placed
3603                         // the servers at indented positions depending on what they
3604                         // are related to)
3605                         int first_nonspace = 0;
3606                         while (matrix[l][first_nonspace] == ' ')
3607                         {
3608                                 first_nonspace++;
3609                         }
3610                         first_nonspace--;
3611                         // Draw the `- (corner) section: this may be overwritten by
3612                         // another L shape passing along the same vertical pane, becoming
3613                         // a |- (branch) section instead.
3614                         matrix[l][first_nonspace] = '-';
3615                         matrix[l][first_nonspace-1] = '`';
3616                         int l2 = l - 1;
3617                         // Draw upwards until we hit the parent server, causing possibly
3618                         // other corners (`-) to become branches (|-)
3619                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3620                         {
3621                                 matrix[l2][first_nonspace-1] = '|';
3622                                 l2--;
3623                         }
3624                 }
3625                 // dump the whole lot to the user. This is the easy bit, honest.
3626                 for (int t = 0; t < line; t++)
3627                 {
3628                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
3629                 }
3630                 float avg_users = totusers / totservers;
3631                 WriteServ(user->fd,"270 %s :%.0f server%s and %.0f user%s, average %.2f users per server",user->nick,totservers,(totservers > 1 ? "s" : ""),totusers,(totusers > 1 ? "s" : ""),avg_users);
3632         WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
3633                 return;
3634         }
3635
3636         int HandleSquit(const char** parameters, int pcnt, userrec* user)
3637         {
3638                 TreeServer* s = FindServerMask(parameters[0]);
3639                 if (s)
3640                 {
3641                         if (s == TreeRoot)
3642                         {
3643                                  WriteServ(user->fd,"NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
3644                                 return 1;
3645                         }
3646                         TreeSocket* sock = s->GetSocket();
3647                         if (sock)
3648                         {
3649                                 log(DEBUG,"Splitting server %s",s->GetName().c_str());
3650                                 WriteOpers("*** SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
3651                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
3652                                 Srv->RemoveSocket(sock);
3653                         }
3654                         else
3655                         {
3656                                 WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
3657                         }
3658                 }
3659                 else
3660                 {
3661                          WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
3662                 }
3663                 return 1;
3664         }
3665
3666         int HandleTime(const char** parameters, int pcnt, userrec* user)
3667         {
3668                 if ((IS_LOCAL(user)) && (pcnt))
3669                 {
3670                         TreeServer* found = FindServerMask(parameters[0]);
3671                         if (found)
3672                         {
3673                                 // we dont' override for local server
3674                                 if (found == TreeRoot)
3675                                         return 0;
3676
3677                                 std::deque<std::string> params;
3678                                 params.push_back(found->GetName());
3679                                 params.push_back(user->nick);
3680                                 DoOneToOne(Srv->GetServerName(),"TIME",params,found->GetName());
3681                         }
3682                         else
3683                         {
3684                                 WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
3685                         }
3686                 }
3687                 return 1;
3688         }
3689
3690         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
3691         {
3692                 if ((IS_LOCAL(user)) && (pcnt > 1))
3693                 {
3694                         userrec* remote = Srv->FindNick(parameters[1]);
3695                         if ((remote) && (remote->fd < 0))
3696                         {
3697                                 std::deque<std::string> params;
3698                                 params.push_back(parameters[1]);
3699                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
3700                                 return 1;
3701                         }
3702                         else if (!remote)
3703                         {
3704                                 WriteServ(user->fd,"401 %s %s :No such nick/channel",user->nick, parameters[1]);
3705                                 WriteServ(user->fd,"318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
3706                                 return 1;
3707                         }
3708                 }
3709                 return 0;
3710         }
3711
3712         void DoPingChecks(time_t curtime)
3713         {
3714                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
3715                 {
3716                         TreeServer* serv = TreeRoot->GetChild(j);
3717                         TreeSocket* sock = serv->GetSocket();
3718                         if (sock)
3719                         {
3720                                 if (curtime >= serv->NextPingTime())
3721                                 {
3722                                         if (serv->AnsweredLastPing())
3723                                         {
3724                                                 sock->WriteLine(":"+Srv->GetServerName()+" PING "+serv->GetName());
3725                                                 serv->SetNextPingTime(curtime + 120);
3726                                         }
3727                                         else
3728                                         {
3729                                                 // they didnt answer, boot them
3730                                                 WriteOpers("*** Server \002%s\002 pinged out",serv->GetName().c_str());
3731                                                 sock->Squit(serv,"Ping timeout");
3732                                                 Srv->RemoveSocket(sock);
3733                                                 return;
3734                                         }
3735                                 }
3736                         }
3737                 }
3738         }
3739
3740         void AutoConnectServers(time_t curtime)
3741         {
3742                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3743                 {
3744                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
3745                         {
3746                                 log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
3747                                 x->NextConnectTime = curtime + x->AutoConnect;
3748                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3749                                 if (!CheckDupe)
3750                                 {
3751                                         // an autoconnected server is not connected. Check if its time to connect it
3752                                         WriteOpers("*** AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
3753
3754                                         insp_inaddr binip;
3755
3756                                         /* Do we already have an IP? If so, no need to resolve it. */
3757                                         if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
3758                                         {
3759                                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name.c_str());
3760                                                 if (newsocket->GetFd() > -1)
3761                                                 {
3762                                                         Srv->AddSocket(newsocket);
3763                                                 }
3764                                                 else
3765                                                 {
3766                                                         WriteOpers("*** AUTOCONNECT: Error autoconnecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
3767                                                         delete newsocket;
3768                                                 }
3769                                         }
3770                                         else
3771                                         {
3772                                                 try
3773                                                 {
3774                                                         ServernameResolver* snr = new ServernameResolver(x->IPAddr, *x);
3775                                                         Srv->AddResolver(snr);
3776                                                 }
3777                                                 catch (ModuleException& e)
3778                                                 {
3779                                                         log(DEBUG,"Error in resolver: %s",e.GetReason());
3780                                                 }
3781                                         }
3782
3783                                 }
3784                         }
3785                 }
3786         }
3787
3788         int HandleVersion(const char** parameters, int pcnt, userrec* user)
3789         {
3790                 // we've already checked if pcnt > 0, so this is safe
3791                 TreeServer* found = FindServerMask(parameters[0]);
3792                 if (found)
3793                 {
3794                         std::string Version = found->GetVersion();
3795                         WriteServ(user->fd,"351 %s :%s",user->nick,Version.c_str());
3796                         if (found == TreeRoot)
3797                         {
3798                                 std::stringstream out(Config->data005);
3799                                 std::string token = "";
3800                                 std::string line5 = "";
3801                                 int token_counter = 0;
3802
3803                                 while (!out.eof())
3804                                 {
3805                                         out >> token;
3806                                         line5 = line5 + token + " ";
3807                                         token_counter++;
3808
3809                                         if ((token_counter >= 13) || (out.eof() == true))
3810                                         {
3811                                                 WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
3812                                                 line5 = "";
3813                                                 token_counter = 0;
3814                                         }
3815                                 }
3816                         }
3817                 }
3818                 else
3819                 {
3820                         WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
3821                 }
3822                 return 1;
3823         }
3824
3825         int HandleConnect(const char** parameters, int pcnt, userrec* user)
3826         {
3827                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3828                 {
3829                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
3830                         {
3831                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3832                                 if (!CheckDupe)
3833                                 {
3834                                         WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: \002%s\002 (%s:%d)",user->nick,x->Name.c_str(),(x->HiddenFromStats ? "<hidden>" : x->IPAddr.c_str()),x->Port);
3835                                         insp_inaddr binip;
3836
3837                                         /* Do we already have an IP? If so, no need to resolve it. */
3838                                         if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
3839                                         {
3840                                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name.c_str());
3841                                                 if (newsocket->GetFd() > -1)
3842                                                 {
3843                                                         Srv->AddSocket(newsocket);
3844                                                 }
3845                                                 else
3846                                                 {
3847                                                         WriteOpers("*** CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
3848                                                         delete newsocket;
3849                                                 }
3850                                         }
3851                                         else
3852                                         {
3853                                                 try
3854                                                 {
3855                                                         ServernameResolver* snr = new ServernameResolver(x->IPAddr, *x);
3856                                                         Srv->AddResolver(snr);
3857                                                 }
3858                                                 catch (ModuleException& e)
3859                                                 {
3860                                                         log(DEBUG,"Error in resolver: %s",e.GetReason());
3861                                                 }
3862                                         }
3863                                         return 1;
3864                                 }
3865                                 else
3866                                 {
3867                                         WriteServ(user->fd,"NOTICE %s :*** CONNECT: Server \002%s\002 already exists on the network and is connected via \002%s\002",user->nick,x->Name.c_str(),CheckDupe->GetParent()->GetName().c_str());
3868                                         return 1;
3869                                 }
3870                         }
3871                 }
3872                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
3873                 return 1;
3874         }
3875
3876         virtual int OnStats(char statschar, userrec* user, string_list &results)
3877         {
3878                 if (statschar == 'c')
3879                 {
3880                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
3881                         {
3882                                 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');
3883                                 results.push_back(Srv->GetServerName()+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
3884                         }
3885                         results.push_back(Srv->GetServerName()+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
3886                         WriteOpers("*** Notice: %s '%c' requested by %s (%s@%s)",(!strcmp(user->server,Config->ServerName) ? "Stats" : "Remote stats"),statschar,user->nick,user->ident,user->host);
3887                         return 1;
3888                 }
3889                 return 0;
3890         }
3891
3892         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated)
3893         {
3894                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
3895                 if (!validated)
3896                         return 0;
3897
3898                 if (command == "CONNECT")
3899                 {
3900                         return this->HandleConnect(parameters,pcnt,user);
3901                 }
3902                 else if (command == "STATS")
3903                 {
3904                         return this->HandleStats(parameters,pcnt,user);
3905                 }
3906                 else if (command == "SQUIT")
3907                 {
3908                         return this->HandleSquit(parameters,pcnt,user);
3909                 }
3910                 else if (command == "MAP")
3911                 {
3912                         this->HandleMap(parameters,pcnt,user);
3913                         return 1;
3914                 }
3915                 else if ((command == "TIME") && (pcnt > 0))
3916                 {
3917                         return this->HandleTime(parameters,pcnt,user);
3918                 }
3919                 else if (command == "LUSERS")
3920                 {
3921                         this->HandleLusers(parameters,pcnt,user);
3922                         return 1;
3923                 }
3924                 else if (command == "LINKS")
3925                 {
3926                         this->HandleLinks(parameters,pcnt,user);
3927                         return 1;
3928                 }
3929                 else if (command == "WHOIS")
3930                 {
3931                         if (pcnt > 1)
3932                         {
3933                                 // remote whois
3934                                 return this->HandleRemoteWhois(parameters,pcnt,user);
3935                         }
3936                 }
3937                 else if ((command == "VERSION") && (pcnt > 0))
3938                 {
3939                         this->HandleVersion(parameters,pcnt,user);
3940                         return 1;
3941                 }
3942                 else if (Srv->IsValidModuleCommand(command, pcnt, user))
3943                 {
3944                         // this bit of code cleverly routes all module commands
3945                         // to all remote severs *automatically* so that modules
3946                         // can just handle commands locally, without having
3947                         // to have any special provision in place for remote
3948                         // commands and linking protocols.
3949                         std::deque<std::string> params;
3950                         params.clear();
3951                         for (int j = 0; j < pcnt; j++)
3952                         {
3953                                 if (strchr(parameters[j],' '))
3954                                 {
3955                                         params.push_back(":" + std::string(parameters[j]));
3956                                 }
3957                                 else
3958                                 {
3959                                         params.push_back(std::string(parameters[j]));
3960                                 }
3961                         }
3962                         log(DEBUG,"Globally route '%s'",command.c_str());
3963                         DoOneToMany(user->nick,command,params);
3964                 }
3965                 return 0;
3966         }
3967
3968         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
3969         {
3970                 TreeServer* s = FindServer(servername);
3971                 if (s)
3972                 {
3973                         description = s->GetDesc();
3974                 }
3975         }
3976
3977         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
3978         {
3979                 if (IS_LOCAL(source))
3980                 {
3981                         std::deque<std::string> params;
3982                         params.push_back(dest->nick);
3983                         params.push_back(channel->name);
3984                         DoOneToMany(source->nick,"INVITE",params);
3985                 }
3986         }
3987
3988         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
3989         {
3990                 std::deque<std::string> params;
3991                 params.push_back(chan->name);
3992                 params.push_back(":"+topic);
3993                 DoOneToMany(user->nick,"TOPIC",params);
3994         }
3995
3996         virtual void OnWallops(userrec* user, const std::string &text)
3997         {
3998                 if (IS_LOCAL(user))
3999                 {
4000                         std::deque<std::string> params;
4001                         params.push_back(":"+text);
4002                         DoOneToMany(user->nick,"WALLOPS",params);
4003                 }
4004         }
4005
4006         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4007         {
4008                 if (target_type == TYPE_USER)
4009                 {
4010                         userrec* d = (userrec*)dest;
4011                         if ((d->fd < 0) && (IS_LOCAL(user)))
4012                         {
4013                                 std::deque<std::string> params;
4014                                 params.clear();
4015                                 params.push_back(d->nick);
4016                                 params.push_back(":"+text);
4017                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4018                         }
4019                 }
4020                 else if (target_type == TYPE_CHANNEL)
4021                 {
4022                         if (IS_LOCAL(user))
4023                         {
4024                                 chanrec *c = (chanrec*)dest;
4025                                 std::string cname = c->name;
4026                                 if (status)
4027                                         cname = status + cname;
4028                                 std::deque<TreeServer*> list;
4029                                 GetListOfServersForChannel(c,list);
4030                                 unsigned int ucount = list.size();
4031                                 for (unsigned int i = 0; i < ucount; i++)
4032                                 {
4033                                         TreeSocket* Sock = list[i]->GetSocket();
4034                                         if (Sock)
4035                                                 Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4036                                 }
4037                         }
4038                 }
4039                 else if (target_type == TYPE_SERVER)
4040                 {
4041                         if (IS_LOCAL(user))
4042                         {
4043                                 char* target = (char*)dest;
4044                                 std::deque<std::string> par;
4045                                 par.push_back(target);
4046                                 par.push_back(":"+text);
4047                                 DoOneToMany(user->nick,"NOTICE",par);
4048                         }
4049                 }
4050         }
4051
4052         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4053         {
4054                 if (target_type == TYPE_USER)
4055                 {
4056                         // route private messages which are targetted at clients only to the server
4057                         // which needs to receive them
4058                         userrec* d = (userrec*)dest;
4059                         if ((d->fd < 0) && (IS_LOCAL(user)))
4060                         {
4061                                 std::deque<std::string> params;
4062                                 params.clear();
4063                                 params.push_back(d->nick);
4064                                 params.push_back(":"+text);
4065                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4066                         }
4067                 }
4068                 else if (target_type == TYPE_CHANNEL)
4069                 {
4070                         if (IS_LOCAL(user))
4071                         {
4072                                 chanrec *c = (chanrec*)dest;
4073                                 std::string cname = c->name;
4074                                 if (status)
4075                                         cname = status + cname;
4076                                 std::deque<TreeServer*> list;
4077                                 GetListOfServersForChannel(c,list);
4078                                 unsigned int ucount = list.size();
4079                                 for (unsigned int i = 0; i < ucount; i++)
4080                                 {
4081                                         TreeSocket* Sock = list[i]->GetSocket();
4082                                         if (Sock)
4083                                                 Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4084                                 }
4085                         }
4086                 }
4087                 else if (target_type == TYPE_SERVER)
4088                 {
4089                         if (IS_LOCAL(user))
4090                         {
4091                                 char* target = (char*)dest;
4092                                 std::deque<std::string> par;
4093                                 par.push_back(target);
4094                                 par.push_back(":"+text);
4095                                 DoOneToMany(user->nick,"PRIVMSG",par);
4096                         }
4097                 }
4098         }
4099
4100         virtual void OnBackgroundTimer(time_t curtime)
4101         {
4102                 AutoConnectServers(curtime);
4103                 DoPingChecks(curtime);
4104         }
4105
4106         virtual void OnUserJoin(userrec* user, chanrec* channel)
4107         {
4108                 // Only do this for local users
4109                 if (IS_LOCAL(user))
4110                 {
4111                         std::deque<std::string> params;
4112                         params.clear();
4113                         params.push_back(channel->name);
4114
4115                         if (channel->GetUserCounter() > 1)
4116                         {
4117                                 // not the first in the channel
4118                                 DoOneToMany(user->nick,"JOIN",params);
4119                         }
4120                         else
4121                         {
4122                                 // first in the channel, set up their permissions
4123                                 // and the channel TS with FJOIN.
4124                                 char ts[24];
4125                                 snprintf(ts,24,"%lu",(unsigned long)channel->age);
4126                                 params.clear();
4127                                 params.push_back(channel->name);
4128                                 params.push_back(ts);
4129                                 params.push_back("@"+std::string(user->nick));
4130                                 DoOneToMany(Srv->GetServerName(),"FJOIN",params);
4131                         }
4132                 }
4133         }
4134
4135         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4136         {
4137                 // only occurs for local clients
4138                 if (user->registered != REG_ALL)
4139                         return;
4140                 std::deque<std::string> params;
4141                 params.push_back(newhost);
4142                 DoOneToMany(user->nick,"FHOST",params);
4143         }
4144
4145         virtual void OnChangeName(userrec* user, const std::string &gecos)
4146         {
4147                 // only occurs for local clients
4148                 if (user->registered != REG_ALL)
4149                         return;
4150                 std::deque<std::string> params;
4151                 params.push_back(gecos);
4152                 DoOneToMany(user->nick,"FNAME",params);
4153         }
4154
4155         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4156         {
4157                 if (IS_LOCAL(user))
4158                 {
4159                         std::deque<std::string> params;
4160                         params.push_back(channel->name);
4161                         if (partmessage != "")
4162                                 params.push_back(":"+partmessage);
4163                         DoOneToMany(user->nick,"PART",params);
4164                 }
4165         }
4166
4167         virtual void OnUserConnect(userrec* user)
4168         {
4169                 char agestr[MAXBUF];
4170                 if (IS_LOCAL(user))
4171                 {
4172                         std::deque<std::string> params;
4173                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4174                         params.push_back(agestr);
4175                         params.push_back(user->nick);
4176                         params.push_back(user->host);
4177                         params.push_back(user->dhost);
4178                         params.push_back(user->ident);
4179                         params.push_back("+"+std::string(user->FormatModes()));
4180                         params.push_back(user->GetIPString());
4181                         params.push_back(":"+std::string(user->fullname));
4182                         DoOneToMany(Srv->GetServerName(),"NICK",params);
4183
4184                         // User is Local, change needs to be reflected!
4185                         TreeServer* SourceServer = FindServer(user->server);
4186                         if (SourceServer)
4187                         {
4188                                 SourceServer->AddUserCount();
4189                         }
4190
4191                 }
4192         }
4193
4194         virtual void OnUserQuit(userrec* user, const std::string &reason)
4195         {
4196                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4197                 {
4198                         std::deque<std::string> params;
4199                         params.push_back(":"+reason);
4200                         DoOneToMany(user->nick,"QUIT",params);
4201                 }
4202                 // Regardless, We need to modify the user Counts..
4203                 TreeServer* SourceServer = FindServer(user->server);
4204                 if (SourceServer)
4205                 {
4206                         SourceServer->DelUserCount();
4207                 }
4208
4209         }
4210
4211         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4212         {
4213                 if (IS_LOCAL(user))
4214                 {
4215                         std::deque<std::string> params;
4216                         params.push_back(user->nick);
4217                         DoOneToMany(oldnick,"NICK",params);
4218                 }
4219         }
4220
4221         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4222         {
4223                 if ((source) && (IS_LOCAL(source)))
4224                 {
4225                         std::deque<std::string> params;
4226                         params.push_back(chan->name);
4227                         params.push_back(user->nick);
4228                         params.push_back(":"+reason);
4229                         DoOneToMany(source->nick,"KICK",params);
4230                 }
4231                 else if (!source)
4232                 {
4233                         std::deque<std::string> params;
4234                         params.push_back(chan->name);
4235                         params.push_back(user->nick);
4236                         params.push_back(":"+reason);
4237                         DoOneToMany(Srv->GetServerName(),"KICK",params);
4238                 }
4239         }
4240
4241         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4242         {
4243                 std::deque<std::string> params;
4244                 params.push_back(dest->nick);
4245                 params.push_back(":"+reason);
4246                 DoOneToMany(source->nick,"KILL",params);
4247         }
4248
4249         virtual void OnRehash(const std::string &parameter)
4250         {
4251                 if (parameter != "")
4252                 {
4253                         std::deque<std::string> params;
4254                         params.push_back(parameter);
4255                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
4256                         // check for self
4257                         if (Srv->MatchText(Srv->GetServerName(),parameter))
4258                         {
4259                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
4260                                 Srv->RehashServer();
4261                         }
4262                 }
4263                 ReadConfiguration(false);
4264         }
4265
4266         // note: the protocol does not allow direct umode +o except
4267         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4268         // locally.
4269         virtual void OnOper(userrec* user, const std::string &opertype)
4270         {
4271                 if (IS_LOCAL(user))
4272                 {
4273                         std::deque<std::string> params;
4274                         params.push_back(opertype);
4275                         DoOneToMany(user->nick,"OPERTYPE",params);
4276                 }
4277         }
4278
4279         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4280         {
4281                 if (IS_LOCAL(source))
4282                 {
4283                         char type[8];
4284                         snprintf(type,8,"%cLINE",linetype);
4285                         std::string stype = type;
4286                         if (adding)
4287                         {
4288                                 char sduration[MAXBUF];
4289                                 snprintf(sduration,MAXBUF,"%ld",duration);
4290                                 std::deque<std::string> params;
4291                                 params.push_back(host);
4292                                 params.push_back(sduration);
4293                                 params.push_back(":"+reason);
4294                                 DoOneToMany(source->nick,stype,params);
4295                         }
4296                         else
4297                         {
4298                                 std::deque<std::string> params;
4299                                 params.push_back(host);
4300                                 DoOneToMany(source->nick,stype,params);
4301                         }
4302                 }
4303         }
4304
4305         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4306         {
4307                 OnLine(source,hostmask,true,'G',duration,reason);
4308         }
4309
4310         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4311         {
4312                 OnLine(source,ipmask,true,'Z',duration,reason);
4313         }
4314
4315         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4316         {
4317                 OnLine(source,nickmask,true,'Q',duration,reason);
4318         }
4319
4320         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4321         {
4322                 OnLine(source,hostmask,true,'E',duration,reason);
4323         }
4324
4325         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4326         {
4327                 OnLine(source,hostmask,false,'G',0,"");
4328         }
4329
4330         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4331         {
4332                 OnLine(source,ipmask,false,'Z',0,"");
4333         }
4334
4335         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4336         {
4337                 OnLine(source,nickmask,false,'Q',0,"");
4338         }
4339
4340         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4341         {
4342                 OnLine(source,hostmask,false,'E',0,"");
4343         }
4344
4345         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4346         {
4347                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4348                 {
4349                         if (target_type == TYPE_USER)
4350                         {
4351                                 userrec* u = (userrec*)dest;
4352                                 std::deque<std::string> params;
4353                                 params.push_back(u->nick);
4354                                 params.push_back(text);
4355                                 DoOneToMany(user->nick,"MODE",params);
4356                         }
4357                         else
4358                         {
4359                                 chanrec* c = (chanrec*)dest;
4360                                 std::deque<std::string> params;
4361                                 params.push_back(c->name);
4362                                 params.push_back(text);
4363                                 DoOneToMany(user->nick,"MODE",params);
4364                         }
4365                 }
4366         }
4367
4368         virtual void OnSetAway(userrec* user)
4369         {
4370                 if (IS_LOCAL(user))
4371                 {
4372                         std::deque<std::string> params;
4373                         params.push_back(":"+std::string(user->awaymsg));
4374                         DoOneToMany(user->nick,"AWAY",params);
4375                 }
4376         }
4377
4378         virtual void OnCancelAway(userrec* user)
4379         {
4380                 if (IS_LOCAL(user))
4381                 {
4382                         std::deque<std::string> params;
4383                         params.clear();
4384                         DoOneToMany(user->nick,"AWAY",params);
4385                 }
4386         }
4387
4388         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4389         {
4390                 TreeSocket* s = (TreeSocket*)opaque;
4391                 if (target)
4392                 {
4393                         if (target_type == TYPE_USER)
4394                         {
4395                                 userrec* u = (userrec*)target;
4396                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4397                         }
4398                         else
4399                         {
4400                                 chanrec* c = (chanrec*)target;
4401                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4402                         }
4403                 }
4404         }
4405
4406         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4407         {
4408                 TreeSocket* s = (TreeSocket*)opaque;
4409                 if (target)
4410                 {
4411                         if (target_type == TYPE_USER)
4412                         {
4413                                 userrec* u = (userrec*)target;
4414                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA "+u->nick+" "+extname+" :"+extdata);
4415                         }
4416                         else if (target_type == TYPE_OTHER)
4417                         {
4418                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA * "+extname+" :"+extdata);
4419                         }
4420                         else if (target_type == TYPE_CHANNEL)
4421                         {
4422                                 chanrec* c = (chanrec*)target;
4423                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA "+c->name+" "+extname+" :"+extdata);
4424                         }
4425                 }
4426         }
4427
4428         virtual void OnEvent(Event* event)
4429         {
4430                 if (event->GetEventID() == "send_metadata")
4431                 {
4432                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4433                         if (params->size() < 3)
4434                                 return;
4435                         (*params)[2] = ":" + (*params)[2];
4436                         DoOneToMany(Srv->GetServerName(),"METADATA",*params);
4437                 }
4438                 else if (event->GetEventID() == "send_mode")
4439                 {
4440                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4441                         if (params->size() < 2)
4442                                 return;
4443                         // Insert the TS value of the object, either userrec or chanrec
4444                         time_t ourTS = 0;
4445                         userrec* a = Srv->FindNick((*params)[0]);
4446                         if (a)
4447                         {
4448                                 ourTS = a->age;
4449                         }
4450                         else
4451                         {
4452                                 chanrec* a = Srv->FindChannel((*params)[0]);
4453                                 if (a)
4454                                 {
4455                                         ourTS = a->age;
4456                                 }
4457                         }
4458                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4459                         DoOneToMany(Srv->GetServerName(),"FMODE",*params);
4460                 }
4461         }
4462
4463         virtual ~ModuleSpanningTree()
4464         {
4465         }
4466
4467         virtual Version GetVersion()
4468         {
4469                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
4470         }
4471
4472         void Implements(char* List)
4473         {
4474                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
4475                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
4476                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
4477                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
4478                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
4479                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
4480                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = 1;
4481         }
4482
4483         /* It is IMPORTANT that m_spanningtree is the last module in the chain
4484          * so that any activity it sees is FINAL, e.g. we arent going to send out
4485          * a NICK message before m_cloaking has finished putting the +x on the user,
4486          * etc etc.
4487          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
4488          * the module call queue.
4489          */
4490         Priority Prioritize()
4491         {
4492                 return PRIORITY_LAST;
4493         }
4494 };
4495
4496
4497 class ModuleSpanningTreeFactory : public ModuleFactory
4498 {
4499  public:
4500         ModuleSpanningTreeFactory()
4501         {
4502         }
4503
4504         ~ModuleSpanningTreeFactory()
4505         {
4506         }
4507
4508         virtual Module * CreateModule(Server* Me)
4509         {
4510                 TreeProtocolModule = new ModuleSpanningTree(Me);
4511                 return TreeProtocolModule;
4512         }
4513
4514 };
4515
4516
4517 extern "C" void * init_module( void )
4518 {
4519         return new ModuleSpanningTreeFactory;
4520 }