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                                 if (params_to_keep.size() > 2)
1157                                 {
1158                                         for (q = 2; (q < params_to_keep.size()) && (q < 64); q++)
1159                                         {
1160                                                 log(DEBUG,"Item %d of %d", q, params_to_keep.size());
1161                                                 modelist[n++] = params_to_keep[q].c_str();
1162                                         }
1163                                 }
1164
1165                                 if (smode)
1166                                 {
1167                                         log(DEBUG,"Send mode");
1168                                         Srv->SendMode(modelist, n+2, who);
1169                                 }
1170                                 else
1171                                 {
1172                                         log(DEBUG,"Send mode client");
1173                                         Srv->CallCommandHandler("MODE", modelist, n+2, who);
1174                                 }
1175
1176                                 /* HOT POTATO! PASS IT ON! */
1177                                 DoOneToAllButSender(source,"FMODE",params,sourceserv);
1178                         }
1179                 }
1180                 else
1181                 /* U-lined servers always win regardless of their TS */
1182                 if ((TS > ourTS) && (!Srv->IsUlined(source)))
1183                 {
1184                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1185                          * SHOULD accept it, if its clock is right.
1186                          *
1187                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1188                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1189                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1190                          *
1191                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1192                          * writing the code. It took me a while to come up with this solution.
1193                          *
1194                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1195                          */
1196
1197                         std::deque<std::string> newparams;      /* New parameter list we send back */
1198                         newparams.push_back(params[0]);         /* Target, user or channel */
1199                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1200                         newparams.push_back("");                /* This contains the mode string. For now
1201                                                                  * it's empty, we fill it below.
1202                                                                  */
1203
1204                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1205                          * set to avoid a desync here.
1206                          */
1207                         std::string modebounce = "";
1208                         bool adding = true;
1209                         unsigned int t = 3;
1210                         ModeHandler* mh = NULL;
1211                         char cur_change = 1;
1212                         char old_change = 0;
1213                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1214                         {
1215                                 /* Iterate over all mode chars in the sent set */
1216                                 switch (*x)
1217                                 {
1218                                         /* Adding or subtracting modes? */
1219                                         case '-':
1220                                                 adding = false;
1221                                         break;
1222                                         case '+':
1223                                                 adding = true;
1224                                         break;
1225                                         default:
1226                                                 /* Find the mode handler for this mode */
1227                                                 mh = ServerInstance->ModeGrok->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1228
1229                                                 /* Got a mode handler?
1230                                                  * This also prevents us bouncing modes we have no handler for.
1231                                                  */
1232                                                 if (mh)
1233                                                 {
1234                                                         ModePair ret;
1235                                                         std::string p = "";
1236
1237                                                         /* Does the mode require a parameter right now?
1238                                                          * If it does, fetch it if we can
1239                                                          */
1240                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1241                                                                 p = params[t++];
1242
1243                                                         /* Call the ModeSet method to determine if its set with the
1244                                                          * given parameter here or not.
1245                                                          */
1246                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1247
1248                                                         /* XXX: Really. Dont ask.
1249                                                          * Determine from if its set combined with what the current
1250                                                          * 'state' is (adding or not) as to wether we should 'invert'
1251                                                          * or 'reinforce' the mode change
1252                                                          */
1253                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1254
1255                                                         /* Quickly determine if we have 'flipped' from + to -,
1256                                                          * or - to +, to prevent unneccessary +/- chars in the
1257                                                          * output string that waste bandwidth
1258                                                          */
1259                                                         if (cur_change != old_change)
1260                                                                 modebounce += cur_change;
1261                                                         old_change = cur_change;
1262
1263                                                         /* Add the mode character to the output string */
1264                                                         modebounce += mh->GetModeChar();
1265
1266                                                         /* We got a parameter back from ModeHandler::ModeSet,
1267                                                          * are we supposed to be sending one out right now?
1268                                                          */
1269                                                         if (ret.second.length())
1270                                                         {
1271                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1272                                                                         /* Yes we're supposed to be sending out
1273                                                                          * the parameter. Make sure it goes
1274                                                                          */
1275                                                                         newparams.push_back(ret.second);
1276                                                         }
1277
1278                                                 }
1279                                         break;
1280                                 }
1281                         }
1282
1283                         /* Update the parameters for FMODE with the new 'bounced' string */
1284                         newparams[2] = modebounce;
1285                         /* Only send it back the way it came, no need to send it anywhere else */
1286                         DoOneToOne(Srv->GetServerName(),"FMODE",newparams,sourceserv);
1287                         log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1288                 }
1289                 else
1290                 {
1291                         log(DEBUG,"Allow modes, TS lower for sender");
1292                         /* The server was ulined, but something iffy is up with the TS.
1293                          * Sound the alarm bells!
1294                          */
1295                         if ((Srv->IsUlined(sourceserv)) && (TS > ourTS))
1296                         {
1297                                 WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",sourceserv.c_str(),params[0].c_str());
1298                         }
1299                         /* Allow the mode, route it to either server or user command handling */
1300                         if (smode)
1301                                 Srv->SendMode(modelist,n,who);
1302                         else
1303                                 Srv->CallCommandHandler("MODE", modelist, n, who);
1304
1305                         /* HOT POTATO! PASS IT ON! */
1306                         DoOneToAllButSender(source,"FMODE",params,sourceserv);
1307                 }
1308                 /* Are we supposed to free the userrec? */
1309                 if (smode)
1310                         DELETE(who);
1311
1312                 return true;
1313         }
1314
1315         /* FTOPIC command */
1316         bool ForceTopic(std::string source, std::deque<std::string> &params)
1317         {
1318                 if (params.size() != 4)
1319                         return true;
1320                 time_t ts = atoi(params[1].c_str());
1321                 std::string nsource = source;
1322
1323                 chanrec* c = Srv->FindChannel(params[0]);
1324                 if (c)
1325                 {
1326                         if ((ts >= c->topicset) || (!*c->topic))
1327                         {
1328                                 std::string oldtopic = c->topic;
1329                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1330                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1331                                 c->topicset = ts;
1332                                 /* if the topic text is the same as the current topic,
1333                                  * dont bother to send the TOPIC command out, just silently
1334                                  * update the set time and set nick.
1335                                  */
1336                                 if (oldtopic != params[3])
1337                                 {
1338                                         userrec* user = Srv->FindNick(source);
1339                                         if (!user)
1340                                         {
1341                                                 WriteChannelWithServ(source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
1342                                         }
1343                                         else
1344                                         {
1345                                                 WriteChannel(c, user, "TOPIC %s :%s", c->name, c->topic);
1346                                                 nsource = user->server;
1347                                         }
1348                                         /* all done, send it on its way */
1349                                         params[3] = ":" + params[3];
1350                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
1351                                 }
1352                         }
1353
1354                 }
1355
1356                 return true;
1357         }
1358
1359         /* FJOIN, similar to unreal SJOIN */
1360         bool ForceJoin(std::string source, std::deque<std::string> &params)
1361         {
1362                 if (params.size() < 3)
1363                         return true;
1364
1365                 char first[MAXBUF];
1366                 char modestring[MAXBUF];
1367                 char* mode_users[127];
1368                 memset(&mode_users,0,sizeof(mode_users));
1369                 mode_users[0] = first;
1370                 mode_users[1] = modestring;
1371                 strcpy(modestring,"+");
1372                 unsigned int modectr = 2;
1373
1374                 userrec* who = NULL;
1375                 std::string channel = params[0];
1376                 time_t TS = atoi(params[1].c_str());
1377                 char* key = "";
1378
1379                 chanrec* chan = Srv->FindChannel(channel);
1380                 if (chan)
1381                 {
1382                         key = chan->key;
1383                 }
1384                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1385
1386                 /* default is a high value, which if we dont have this
1387                  * channel will let the other side apply their modes.
1388                  */
1389                 time_t ourTS = time(NULL)+600;
1390                 chanrec* us = Srv->FindChannel(channel);
1391                 if (us)
1392                 {
1393                         ourTS = us->age;
1394                 }
1395
1396                 log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
1397
1398                 /* do this first, so our mode reversals are correctly received by other servers
1399                  * if there is a TS collision.
1400                  */
1401                 DoOneToAllButSender(source,"FJOIN",params,source);
1402
1403                 for (unsigned int usernum = 2; usernum < params.size(); usernum++)
1404                 {
1405                         /* process one channel at a time, applying modes. */
1406                         char* usr = (char*)params[usernum].c_str();
1407                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1408                          * (is this even possible?) */
1409                         if (usr && *usr)
1410                         {
1411                                 char permissions = *usr;
1412                                 switch (permissions)
1413                                 {
1414                                         case '@':
1415                                                 usr++;
1416                                                 mode_users[modectr++] = usr;
1417                                                 strlcat(modestring,"o",MAXBUF);
1418                                         break;
1419                                         case '%':
1420                                                 usr++;
1421                                                 mode_users[modectr++] = usr;
1422                                                 strlcat(modestring,"h",MAXBUF);
1423                                         break;
1424                                         case '+':
1425                                                 usr++;
1426                                                 mode_users[modectr++] = usr;
1427                                                 strlcat(modestring,"v",MAXBUF);
1428                                         break;
1429                                 }
1430                                 who = Srv->FindNick(usr);
1431                                 if (who)
1432                                 {
1433                                         Srv->JoinUserToChannel(who,channel,key);
1434                                         if (modectr >= (MAXMODES-1))
1435                                         {
1436                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1437                                                  * if there are more than MAXMODES to go.
1438                                                  */
1439                                                 if ((ourTS >= TS) || (Srv->IsUlined(who->server)))
1440                                                 {
1441                                                         /* We also always let u-lined clients win, no matter what the TS value */
1442                                                         log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1443                                                         Srv->SendMode((const char**)mode_users,modectr,who);
1444                                                         if (ourTS != TS)
1445                                                         {
1446                                                                 log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1447                                                                 us->age = TS;
1448                                                                 ourTS = TS;
1449                                                         }
1450                                                 }
1451                                                 else
1452                                                 {
1453                                                         log(DEBUG,"Their channel newer than ours, bouncing their modes");
1454                                                         /* bouncy bouncy! */
1455                                                         std::deque<std::string> params;
1456                                                         /* modes are now being UNSET... */
1457                                                         *mode_users[1] = '-';
1458                                                         for (unsigned int x = 0; x < modectr; x++)
1459                                                         {
1460                                                                 if (x == 1)
1461                                                                 {
1462                                                                         params.push_back(ConvToStr(us->age));
1463                                                                 }
1464                                                                 params.push_back(mode_users[x]);
1465
1466                                                         }
1467                                                         // tell everyone to bounce the modes. bad modes, bad!
1468                                                         DoOneToMany(Srv->GetServerName(),"FMODE",params);
1469                                                 }
1470                                                 strcpy(mode_users[1],"+");
1471                                                 modectr = 2;
1472                                         }
1473                                 }
1474                         }
1475                 }
1476                 /* there werent enough modes built up to flush it during FJOIN,
1477                  * or, there are a number left over. flush them out.
1478                  */
1479                 if ((modectr > 2) && (who) && (us))
1480                 {
1481                         if (ourTS >= TS)
1482                         {
1483                                 log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1484                                 Srv->SendMode((const char**)mode_users,modectr,who);
1485                                 if (ourTS != TS)
1486                                 {
1487                                         log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1488                                         us->age = TS;
1489                                         ourTS = TS;
1490                                 }
1491                         }
1492                         else
1493                         {
1494                                 log(DEBUG,"Their channel newer than ours, bouncing their modes");
1495                                 std::deque<std::string> params;
1496                                 *mode_users[1] = '-';
1497                                 for (unsigned int x = 0; x < modectr; x++)
1498                                 {
1499                                         if (x == 1)
1500                                         {
1501                                                 params.push_back(ConvToStr(us->age));
1502                                         }
1503                                         params.push_back(mode_users[x]);
1504                                 }
1505                                 DoOneToMany(Srv->GetServerName(),"FMODE",params);
1506                         }
1507                 }
1508                 return true;
1509         }
1510
1511         bool SyncChannelTS(std::string source, std::deque<std::string> &params)
1512         {
1513                 if (params.size() >= 2)
1514                 {
1515                         chanrec* c = Srv->FindChannel(params[0]);
1516                         if (c)
1517                         {
1518                                 time_t theirTS = atoi(params[1].c_str());
1519                                 time_t ourTS = c->age;
1520                                 if (ourTS >= theirTS)
1521                                 {
1522                                         log(DEBUG,"Updating timestamp for %s, our timestamp was %lu and theirs is %lu",c->name,ourTS,theirTS);
1523                                         c->age = theirTS;
1524                                 }
1525                         }
1526                 }
1527                 DoOneToAllButSender(Srv->GetServerName(),"SYNCTS",params,source);
1528                 return true;
1529         }
1530
1531         /* NICK command */
1532         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1533         {
1534                 if (params.size() < 8)
1535                         return true;
1536                 if (params.size() > 8)
1537                 {
1538                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1539                         return true;
1540                 }
1541                 // NICK age nick host dhost ident +modes ip :gecos
1542                 //       0    1   2     3     4      5   6     7
1543                 time_t age = atoi(params[0].c_str());
1544
1545                 /* This used to have a pretty craq'y loop doing the same thing,
1546                  * now we just let the STL do the hard work (more efficiently)
1547                  */
1548                 params[5] = params[5].substr(params[5].find_first_not_of('+'));
1549
1550                 const char* tempnick = params[1].c_str();
1551                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1552
1553                 user_hash::iterator iter = clientlist.find(tempnick);
1554
1555                 if (iter != clientlist.end())
1556                 {
1557                         // nick collision
1558                         log(DEBUG,"Nick collision on %s!%s@%s: %lu %lu",tempnick,params[4].c_str(),params[2].c_str(),(unsigned long)age,(unsigned long)iter->second->age);
1559                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Nickname collision");
1560                         return true;
1561                 }
1562
1563                 clientlist[tempnick] = new userrec();
1564                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
1565                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX-1);
1566                 strlcpy(clientlist[tempnick]->host, params[2].c_str(),63);
1567                 strlcpy(clientlist[tempnick]->dhost, params[3].c_str(),63);
1568                 clientlist[tempnick]->server = FindServerNamePtr(source.c_str());
1569                 strlcpy(clientlist[tempnick]->ident, params[4].c_str(),IDENTMAX);
1570                 strlcpy(clientlist[tempnick]->fullname, params[7].c_str(),MAXGECOS);
1571                 clientlist[tempnick]->registered = REG_ALL;
1572                 clientlist[tempnick]->signon = age;
1573
1574                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1575                 {
1576                         clientlist[tempnick]->modes[(*v)-65] = 1;
1577                 }
1578
1579                 if (params[6].find_first_of(":") != std::string::npos)
1580                         clientlist[tempnick]->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1581                 else
1582                         clientlist[tempnick]->SetSockAddr(AF_INET, params[6].c_str(), 0);
1583
1584                 WriteOpers("*** Client connecting at %s: %s!%s@%s [%s]",clientlist[tempnick]->server,clientlist[tempnick]->nick,clientlist[tempnick]->ident,clientlist[tempnick]->host, clientlist[tempnick]->GetIPString());
1585
1586                 params[7] = ":" + params[7];
1587                 DoOneToAllButSender(source,"NICK",params,source);
1588
1589                 // Increment the Source Servers User Count..
1590                 TreeServer* SourceServer = FindServer(source);
1591                 if (SourceServer)
1592                 {
1593                         log(DEBUG,"Found source server of %s",clientlist[tempnick]->nick);
1594                         SourceServer->AddUserCount();
1595                 }
1596
1597                 return true;
1598         }
1599
1600         /* Send one or more FJOINs for a channel of users.
1601          * If the length of a single line is more than 480-NICKMAX
1602          * in length, it is split over multiple lines.
1603          */
1604         void SendFJoins(TreeServer* Current, chanrec* c)
1605         {
1606                 log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1607                 char list[MAXBUF];
1608                 std::string individual_halfops = ":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age);
1609
1610                 size_t dlen, curlen;
1611                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
1612                 int numusers = 0;
1613                 char* ptr = list + dlen;
1614
1615                 CUList *ulist = c->GetUsers();
1616                 std::vector<userrec*> specific_halfop;
1617                 std::vector<userrec*> specific_voice;
1618                 std::string modes = "";
1619                 std::string params = "";
1620
1621                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1622                 {
1623                         int x = cflags(i->second,c);
1624                         if ((x & UCMODE_HOP) && (x & UCMODE_OP))
1625                         {
1626                                 specific_halfop.push_back(i->second);
1627                         }
1628                         if (((x & UCMODE_HOP) || (x & UCMODE_OP)) && (x & UCMODE_VOICE))
1629                         {
1630                                 specific_voice.push_back(i->second);
1631                         }
1632
1633                         const char* n = "";
1634                         if (x & UCMODE_OP)
1635                         {
1636                                 n = "@";
1637                         }
1638                         else if (x & UCMODE_HOP)
1639                         {
1640                                 n = "%";
1641                         }
1642                         else if (x & UCMODE_VOICE)
1643                         {
1644                                 n = "+";
1645                         }
1646
1647                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s", n, i->second->nick);
1648
1649                         curlen += ptrlen;
1650                         ptr += ptrlen;
1651
1652                         numusers++;
1653
1654                         if (curlen > (480-NICKMAX))
1655                         {
1656                                 this->WriteLine(list);
1657                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
1658                                 ptr = list + dlen;
1659                                 ptrlen = 0;
1660                                 numusers = 0;
1661                                 for (unsigned int y = 0; y < specific_voice.size(); y++)
1662                                 {
1663                                         modes.append("v");
1664                                         params.append(specific_voice[y]->nick).append(" ");
1665                                         //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +v "+specific_voice[y]->nick);
1666                                 }
1667                                 for (unsigned int y = 0; y < specific_halfop.size(); y++)
1668                                 {
1669                                         modes.append("h");
1670                                         params.append(specific_halfop[y]->nick).append(" ");
1671                                         //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +h "+specific_halfop[y]->nick);
1672                                 }
1673                         }
1674                 }
1675                 if (numusers)
1676                 {
1677                         this->WriteLine(list);
1678                         for (unsigned int y = 0; y < specific_voice.size(); y++)
1679                         {
1680                                 modes.append("v");
1681                                 params.append(specific_voice[y]->nick).append(" ");
1682                                 //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +v "+specific_voice[y]->nick);
1683                         }
1684                         for (unsigned int y = 0; y < specific_halfop.size(); y++)
1685                         {
1686                                 modes.append("h");
1687                                 params.append(specific_halfop[y]->nick).append(" ");
1688                                 //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +h "+specific_halfop[y]->nick);
1689                         }
1690                 }
1691                 //std::string modes = "";
1692                 //std::string params = "";
1693                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1694                 {
1695                         modes.append("b");
1696                         params.append(b->data).append(" ");
1697                 }
1698                 /* XXX: Send each channel mode and its params -- we'll need a method for this in ModeHandler? */
1699                 //FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1700                 this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+chanmodes(c,true)+modes+" "+params);
1701         }
1702
1703         /* Send G, Q, Z and E lines */
1704         void SendXLines(TreeServer* Current)
1705         {
1706                 char data[MAXBUF];
1707                 std::string n = Srv->GetServerName();
1708                 const char* sn = n.c_str();
1709                 int iterations = 0;
1710                 /* Yes, these arent too nice looking, but they get the job done */
1711                 for (std::vector<ZLine>::iterator i = zlines.begin(); i != zlines.end(); i++, iterations++)
1712                 {
1713                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,i->ipaddr,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1714                         this->WriteLine(data);
1715                 }
1716                 for (std::vector<QLine>::iterator i = qlines.begin(); i != qlines.end(); i++, iterations++)
1717                 {
1718                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,i->nick,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1719                         this->WriteLine(data);
1720                 }
1721                 for (std::vector<GLine>::iterator i = glines.begin(); i != glines.end(); i++, iterations++)
1722                 {
1723                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1724                         this->WriteLine(data);
1725                 }
1726                 for (std::vector<ELine>::iterator i = elines.begin(); i != elines.end(); i++, iterations++)
1727                 {
1728                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1729                         this->WriteLine(data);
1730                 }
1731                 for (std::vector<ZLine>::iterator i = pzlines.begin(); i != pzlines.end(); i++, iterations++)
1732                 {
1733                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,i->ipaddr,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1734                         this->WriteLine(data);
1735                 }
1736                 for (std::vector<QLine>::iterator i = pqlines.begin(); i != pqlines.end(); i++, iterations++)
1737                 {
1738                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,i->nick,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1739                         this->WriteLine(data);
1740                 }
1741                 for (std::vector<GLine>::iterator i = pglines.begin(); i != pglines.end(); i++, iterations++)
1742                 {
1743                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1744                         this->WriteLine(data);
1745                 }
1746                 for (std::vector<ELine>::iterator i = pelines.begin(); i != pelines.end(); i++, iterations++)
1747                 {
1748                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1749                         this->WriteLine(data);
1750                 }
1751         }
1752
1753         /* Send channel modes and topics */
1754         void SendChannelModes(TreeServer* Current)
1755         {
1756                 char data[MAXBUF];
1757                 std::deque<std::string> list;
1758                 int iterations = 0;
1759                 std::string n = Srv->GetServerName();
1760                 const char* sn = n.c_str();
1761                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++, iterations++)
1762                 {
1763                         SendFJoins(Current, c->second);
1764                         if (*c->second->topic)
1765                         {
1766                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1767                                 this->WriteLine(data);
1768                         }
1769                         FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1770                         list.clear();
1771                         c->second->GetExtList(list);
1772                         for (unsigned int j = 0; j < list.size(); j++)
1773                         {
1774                                 FOREACH_MOD(I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1775                         }
1776                 }
1777         }
1778
1779         /* send all users and their oper state/modes */
1780         void SendUsers(TreeServer* Current)
1781         {
1782                 char data[MAXBUF];
1783                 std::deque<std::string> list;
1784                 int iterations = 0;
1785                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++, iterations++)
1786                 {
1787                         if (u->second->registered == REG_ALL)
1788                         {
1789                                 snprintf(data,MAXBUF,":%s NICK %lu %s %s %s %s +%s %s :%s",u->second->server,(unsigned long)u->second->age,u->second->nick,u->second->host,u->second->dhost,u->second->ident,u->second->FormatModes(),u->second->GetIPString(),u->second->fullname);
1790                                 this->WriteLine(data);
1791                                 if (*u->second->oper)
1792                                 {
1793                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1794                                 }
1795                                 if (*u->second->awaymsg)
1796                                 {
1797                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1798                                 }
1799                                 FOREACH_MOD(I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1800                                 list.clear();
1801                                 u->second->GetExtList(list);
1802                                 for (unsigned int j = 0; j < list.size(); j++)
1803                                 {
1804                                         FOREACH_MOD(I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1805                                 }
1806                         }
1807                 }
1808         }
1809
1810         /* This function is called when we want to send a netburst to a local
1811          * server. There is a set order we must do this, because for example
1812          * users require their servers to exist, and channels require their
1813          * users to exist. You get the idea.
1814          */
1815         void DoBurst(TreeServer* s)
1816         {
1817                 /* The calls here to ServerInstance-> yield the processing
1818                  * back to the core so that a large burst is split into at least 6 sections
1819                  * (possibly more)
1820                  */
1821                 std::string burst = "BURST "+ConvToStr(time(NULL));
1822                 std::string endburst = "ENDBURST";
1823                 // Because by the end of the netburst, it  could be gone!
1824                 std::string name = s->GetName();
1825                 Srv->SendOpers("*** Bursting to \2"+name+"\2.");
1826                 this->WriteLine(burst);
1827                 /* send our version string */
1828                 this->WriteLine(":"+Srv->GetServerName()+" VERSION :"+Srv->GetVersion());
1829                 /* Send server tree */
1830                 this->SendServers(TreeRoot,s,1);
1831                 /* Send users and their oper status */
1832                 this->SendUsers(s);
1833                 /* Send everything else (channel modes, xlines etc) */
1834                 this->SendChannelModes(s);
1835                 this->SendXLines(s);
1836                 FOREACH_MOD(I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1837                 this->WriteLine(endburst);
1838                 Srv->SendOpers("*** Finished bursting to \2"+name+"\2.");
1839         }
1840
1841         /* This function is called when we receive data from a remote
1842          * server. We buffer the data in a std::string (it doesnt stay
1843          * there for long), reading using InspSocket::Read() which can
1844          * read up to 16 kilobytes in one operation.
1845          *
1846          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1847          * THE SOCKET OBJECT FOR US.
1848          */
1849         virtual bool OnDataReady()
1850         {
1851                 char* data = this->Read();
1852                 /* Check that the data read is a valid pointer and it has some content */
1853                 if (data && *data)
1854                 {
1855                         this->in_buffer.append(data);
1856                         /* While there is at least one new line in the buffer,
1857                          * do something useful (we hope!) with it.
1858                          */
1859                         while (in_buffer.find("\n") != std::string::npos)
1860                         {
1861                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1862                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1863                                 if (ret.find("\r") != std::string::npos)
1864                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1865                                 /* Process this one, abort if it
1866                                  * didnt return true.
1867                                  */
1868                                 if (this->ctx_in)
1869                                 {
1870                                         char out[1024];
1871                                         char result[1024];
1872                                         memset(result,0,1024);
1873                                         memset(out,0,1024);
1874                                         log(DEBUG,"Original string '%s'",ret.c_str());
1875                                         /* ERROR + CAPAB is still allowed unencryped */
1876                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1877                                         {
1878                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1879                                                 if ((nbytes > 0) && (nbytes < 1024))
1880                                                 {
1881                                                         log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1882                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1883                                                         for (int t = 0; t < nbytes; t++)
1884                                                                 if (result[t] == '\7') result[t] = 0;
1885                                                         ret = result;
1886                                                 }
1887                                         }
1888                                 }
1889                                 if (!this->ProcessLine(ret))
1890                                 {
1891                                         log(DEBUG,"ProcessLine says no!");
1892                                         return false;
1893                                 }
1894                         }
1895                         return true;
1896                 }
1897                 /* EAGAIN returns an empty but non-NULL string, so this
1898                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1899                  */
1900                 return (data && !*data);
1901         }
1902
1903         int WriteLine(std::string line)
1904         {
1905                 log(DEBUG,"OUT: %s",line.c_str());
1906                 if (this->ctx_out)
1907                 {
1908                         char result[10240];
1909                         char result64[10240];
1910                         if (this->keylength)
1911                         {
1912                                 // pad it to the key length
1913                                 int n = this->keylength - (line.length() % this->keylength);
1914                                 if (n)
1915                                 {
1916                                         log(DEBUG,"Append %d chars to line to make it %d long from %d, key length %d",n,n+line.length(),line.length(),this->keylength);
1917                                         line.append(n,'\7');
1918                                 }
1919                         }
1920                         unsigned int ll = line.length();
1921                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
1922                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
1923                         line = result64;
1924                         //int from64tobits(char *out, const char *in, int maxlen);
1925                 }
1926                 return this->Write(line + "\r\n");
1927         }
1928
1929         /* Handle ERROR command */
1930         bool Error(std::deque<std::string> &params)
1931         {
1932                 if (params.size() < 1)
1933                         return false;
1934                 WriteOpers("*** ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
1935                 /* we will return false to cause the socket to close. */
1936                 return false;
1937         }
1938
1939         bool Stats(std::string prefix, std::deque<std::string> &params)
1940         {
1941                 /* Get the reply to a STATS query if it matches this servername,
1942                  * and send it back as a load of PUSH queries
1943                  */
1944                 if (params.size() > 1)
1945                 {
1946                         if (Srv->MatchText(Srv->GetServerName(), params[1]))
1947                         {
1948                                 /* It's for our server */
1949                                 string_list results;
1950                                 userrec* source = Srv->FindNick(prefix);
1951                                 if (source)
1952                                 {
1953                                         std::deque<std::string> par;
1954                                         par.push_back(prefix);
1955                                         par.push_back("");
1956                                         DoStats(*(params[0].c_str()), source, results);
1957                                         for (size_t i = 0; i < results.size(); i++)
1958                                         {
1959                                                 par[1] = "::" + results[i];
1960                                                 DoOneToOne(Srv->GetServerName(), "PUSH",par, source->server);
1961                                         }
1962                                 }
1963                         }
1964                         else
1965                         {
1966                                 /* Pass it on */
1967                                 userrec* source = Srv->FindNick(prefix);
1968                                 if (source)
1969                                         DoOneToOne(prefix, "STATS", params, params[1]);
1970                         }
1971                 }
1972                 return true;
1973         }
1974
1975
1976         /* Because the core won't let users or even SERVERS set +o,
1977          * we use the OPERTYPE command to do this.
1978          */
1979         bool OperType(std::string prefix, std::deque<std::string> &params)
1980         {
1981                 if (params.size() != 1)
1982                 {
1983                         log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
1984                         return true;
1985                 }
1986                 std::string opertype = params[0];
1987                 userrec* u = Srv->FindNick(prefix);
1988                 if (u)
1989                 {
1990                         u->modes[UM_OPERATOR] = 1;
1991                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
1992                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
1993                 }
1994                 return true;
1995         }
1996
1997         /* Because Andy insists that services-compatible servers must
1998          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
1999          */
2000         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2001         {
2002                 if (params.size() < 3)
2003                         return true;
2004
2005                 userrec* u = Srv->FindNick(params[0]);
2006
2007                 if (u)
2008                 {
2009                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2010                         if (IS_LOCAL(u))
2011                         {
2012                                 std::deque<std::string> par;
2013                                 par.push_back(params[1]);
2014                                 /* This is not required as one is sent in OnUserPostNick below
2015                                  */
2016                                 //DoOneToMany(u->nick,"NICK",par);
2017                                 Srv->ChangeUserNick(u,params[1]);
2018                                 u->age = atoi(params[2].c_str());
2019                         }
2020                 }
2021                 return true;
2022         }
2023
2024         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2025         {
2026                 if (params.size() < 2)
2027                         return true;
2028
2029                 userrec* u = Srv->FindNick(params[0]);
2030
2031                 if (u)
2032                 {
2033                         Srv->JoinUserToChannel(u,params[1],"");
2034                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2035                 }
2036                 return true;
2037         }
2038
2039         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2040         {
2041                 if (params.size() < 1)
2042                         return false;
2043
2044                 std::string servermask = params[0];
2045
2046                 if (Srv->MatchText(Srv->GetServerName(),servermask))
2047                 {
2048                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
2049                         Srv->RehashServer();
2050                         ReadConfiguration(false);
2051                 }
2052                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2053                 return true;
2054         }
2055
2056         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2057         {
2058                 if (params.size() != 2)
2059                         return true;
2060
2061                 std::string nick = params[0];
2062                 userrec* u = Srv->FindNick(prefix);
2063                 userrec* who = Srv->FindNick(nick);
2064
2065                 if (who)
2066                 {
2067                         /* Prepend kill source, if we don't have one */
2068                         std::string sourceserv = prefix;
2069                         if (u)
2070                         {
2071                                 sourceserv = u->server;
2072                         }
2073                         if (*(params[1].c_str()) != '[')
2074                         {
2075                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2076                         }
2077                         std::string reason = params[1];
2078                         params[1] = ":" + params[1];
2079                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2080                         ::Write(who->fd, ":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2081                         Srv->QuitUser(who,reason);
2082                 }
2083                 return true;
2084         }
2085
2086         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2087         {
2088                 if (params.size() < 1)
2089                         return true;
2090
2091                 if (params.size() == 1)
2092                 {
2093                         TreeServer* ServerSource = FindServer(prefix);
2094                         if (ServerSource)
2095                         {
2096                                 ServerSource->SetPingFlag();
2097                         }
2098                 }
2099                 else
2100                 {
2101                         std::string forwardto = params[1];
2102                         if (forwardto == Srv->GetServerName())
2103                         {
2104                                 /*
2105                                  * this is a PONG for us
2106                                  * if the prefix is a user, check theyre local, and if they are,
2107                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2108                                  * Services might want to send these s->s, but we dont need to yet.
2109                                  */
2110                                 userrec* u = Srv->FindNick(prefix);
2111
2112                                 if (u)
2113                                 {
2114                                         WriteServ(u->fd,"PONG %s %s",params[0].c_str(),params[1].c_str());
2115                                 }
2116                         }
2117                         else
2118                         {
2119                                 // not for us, pass it on :)
2120                                 DoOneToOne(prefix,"PONG",params,forwardto);
2121                         }
2122                 }
2123
2124                 return true;
2125         }
2126
2127         bool MetaData(std::string prefix, std::deque<std::string> &params)
2128         {
2129                 if (params.size() < 3)
2130                         return true;
2131
2132                 TreeServer* ServerSource = FindServer(prefix);
2133
2134                 if (ServerSource)
2135                 {
2136                         if (params[0] == "*")
2137                         {
2138                                 FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2139                         }
2140                         else if (*(params[0].c_str()) == '#')
2141                         {
2142                                 chanrec* c = Srv->FindChannel(params[0]);
2143                                 if (c)
2144                                 {
2145                                         FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2146                                 }
2147                         }
2148                         else if (*(params[0].c_str()) != '#')
2149                         {
2150                                 userrec* u = Srv->FindNick(params[0]);
2151                                 if (u)
2152                                 {
2153                                         FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2154                                 }
2155                         }
2156                 }
2157
2158                 params[2] = ":" + params[2];
2159                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2160                 return true;
2161         }
2162
2163         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2164         {
2165                 if (params.size() < 1)
2166                         return true;
2167
2168                 TreeServer* ServerSource = FindServer(prefix);
2169
2170                 if (ServerSource)
2171                 {
2172                         ServerSource->SetVersion(params[0]);
2173                 }
2174                 params[0] = ":" + params[0];
2175                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2176                 return true;
2177         }
2178
2179         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2180         {
2181                 if (params.size() < 1)
2182                         return true;
2183
2184                 userrec* u = Srv->FindNick(prefix);
2185
2186                 if (u)
2187                 {
2188                         Srv->ChangeHost(u,params[0]);
2189                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2190                 }
2191                 return true;
2192         }
2193
2194         bool AddLine(std::string prefix, std::deque<std::string> &params)
2195         {
2196                 if (params.size() < 6)
2197                         return true;
2198
2199                 bool propogate = false;
2200
2201                 switch (*(params[0].c_str()))
2202                 {
2203                         case 'Z':
2204                                 propogate = add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2205                                 zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2206                         break;
2207                         case 'Q':
2208                                 propogate = add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2209                                 qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2210                         break;
2211                         case 'E':
2212                                 propogate = add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2213                                 eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2214                         break;
2215                         case 'G':
2216                                 propogate = add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2217                                 gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2218                         break;
2219                         case 'K':
2220                                 propogate = add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2221                         break;
2222                         default:
2223                                 /* Just in case... */
2224                                 Srv->SendOpers("*** \2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2225                                 propogate = false;
2226                         break;
2227                 }
2228
2229                 /* Send it on its way */
2230                 if (propogate)
2231                 {
2232                         if (atoi(params[4].c_str()))
2233                         {
2234                                 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());
2235                         }
2236                         else
2237                         {
2238                                 WriteOpers("*** %s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
2239                         }
2240                         params[5] = ":" + params[5];
2241                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2242                 }
2243                 if (!this->bursting)
2244                 {
2245                         log(DEBUG,"Applying lines...");
2246                         apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2247                 }
2248                 return true;
2249         }
2250
2251         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2252         {
2253                 if (params.size() < 1)
2254                         return true;
2255
2256                 userrec* u = Srv->FindNick(prefix);
2257
2258                 if (u)
2259                 {
2260                         Srv->ChangeGECOS(u,params[0]);
2261                         params[0] = ":" + params[0];
2262                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2263                 }
2264                 return true;
2265         }
2266
2267         bool Whois(std::string prefix, std::deque<std::string> &params)
2268         {
2269                 if (params.size() < 1)
2270                         return true;
2271
2272                 log(DEBUG,"In IDLE command");
2273                 userrec* u = Srv->FindNick(prefix);
2274
2275                 if (u)
2276                 {
2277                         log(DEBUG,"USER EXISTS: %s",u->nick);
2278                         // an incoming request
2279                         if (params.size() == 1)
2280                         {
2281                                 userrec* x = Srv->FindNick(params[0]);
2282                                 if ((x) && (IS_LOCAL(x)))
2283                                 {
2284                                         userrec* x = Srv->FindNick(params[0]);
2285                                         log(DEBUG,"Got IDLE");
2286                                         char signon[MAXBUF];
2287                                         char idle[MAXBUF];
2288                                         log(DEBUG,"Sending back IDLE 3");
2289                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2290                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2291                                         std::deque<std::string> par;
2292                                         par.push_back(prefix);
2293                                         par.push_back(signon);
2294                                         par.push_back(idle);
2295                                         // ours, we're done, pass it BACK
2296                                         DoOneToOne(params[0],"IDLE",par,u->server);
2297                                 }
2298                                 else
2299                                 {
2300                                         // not ours pass it on
2301                                         DoOneToOne(prefix,"IDLE",params,x->server);
2302                                 }
2303                         }
2304                         else if (params.size() == 3)
2305                         {
2306                                 std::string who_did_the_whois = params[0];
2307                                 userrec* who_to_send_to = Srv->FindNick(who_did_the_whois);
2308                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2309                                 {
2310                                         log(DEBUG,"Got final IDLE");
2311                                         // an incoming reply to a whois we sent out
2312                                         std::string nick_whoised = prefix;
2313                                         unsigned long signon = atoi(params[1].c_str());
2314                                         unsigned long idle = atoi(params[2].c_str());
2315                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2316                                                 do_whois(who_to_send_to,u,signon,idle,nick_whoised.c_str());
2317                                 }
2318                                 else
2319                                 {
2320                                         // not ours, pass it on
2321                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2322                                 }
2323                         }
2324                 }
2325                 return true;
2326         }
2327
2328         bool Push(std::string prefix, std::deque<std::string> &params)
2329         {
2330                 if (params.size() < 2)
2331                         return true;
2332
2333                 userrec* u = Srv->FindNick(params[0]);
2334
2335                 if (!u)
2336                         return true;
2337
2338                 if (IS_LOCAL(u))
2339                 {
2340                         ::Write(u->fd,"%s",params[1].c_str());
2341                 }
2342                 else
2343                 {
2344                         // continue the raw onwards
2345                         params[1] = ":" + params[1];
2346                         DoOneToOne(prefix,"PUSH",params,u->server);
2347                 }
2348                 return true;
2349         }
2350
2351         bool Time(std::string prefix, std::deque<std::string> &params)
2352         {
2353                 // :source.server TIME remote.server sendernick
2354                 // :remote.server TIME source.server sendernick TS
2355                 if (params.size() == 2)
2356                 {
2357                         // someone querying our time?
2358                         if (Srv->GetServerName() == params[0])
2359                         {
2360                                 userrec* u = Srv->FindNick(params[1]);
2361                                 if (u)
2362                                 {
2363                                         char curtime[256];
2364                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2365                                         params.push_back(curtime);
2366                                         params[0] = prefix;
2367                                         DoOneToOne(Srv->GetServerName(),"TIME",params,params[0]);
2368                                 }
2369                         }
2370                         else
2371                         {
2372                                 // not us, pass it on
2373                                 userrec* u = Srv->FindNick(params[1]);
2374                                 if (u)
2375                                         DoOneToOne(prefix,"TIME",params,params[0]);
2376                         }
2377                 }
2378                 else if (params.size() == 3)
2379                 {
2380                         // a response to a previous TIME
2381                         userrec* u = Srv->FindNick(params[1]);
2382                         if ((u) && (IS_LOCAL(u)))
2383                         {
2384                         time_t rawtime = atol(params[2].c_str());
2385                         struct tm * timeinfo;
2386                         timeinfo = localtime(&rawtime);
2387                                 char tms[26];
2388                                 snprintf(tms,26,"%s",asctime(timeinfo));
2389                                 tms[24] = 0;
2390                         WriteServ(u->fd,"391 %s %s :%s",u->nick,prefix.c_str(),tms);
2391                         }
2392                         else
2393                         {
2394                                 if (u)
2395                                         DoOneToOne(prefix,"TIME",params,u->server);
2396                         }
2397                 }
2398                 return true;
2399         }
2400
2401         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2402         {
2403                 if (params.size() < 1)
2404                         return true;
2405
2406                 if (params.size() == 1)
2407                 {
2408                         std::string stufftobounce = params[0];
2409                         this->WriteLine(":"+Srv->GetServerName()+" PONG "+stufftobounce);
2410                         return true;
2411                 }
2412                 else
2413                 {
2414                         std::string forwardto = params[1];
2415                         if (forwardto == Srv->GetServerName())
2416                         {
2417                                 // this is a ping for us, send back PONG to the requesting server
2418                                 params[1] = params[0];
2419                                 params[0] = forwardto;
2420                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2421                         }
2422                         else
2423                         {
2424                                 // not for us, pass it on :)
2425                                 DoOneToOne(prefix,"PING",params,forwardto);
2426                         }
2427                         return true;
2428                 }
2429         }
2430
2431         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2432         {
2433                 if (params.size() < 4)
2434                         return false;
2435
2436                 std::string servername = params[0];
2437                 std::string password = params[1];
2438                 // hopcount is not used for a remote server, we calculate this ourselves
2439                 std::string description = params[3];
2440                 TreeServer* ParentOfThis = FindServer(prefix);
2441
2442                 if (!ParentOfThis)
2443                 {
2444                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2445                         return false;
2446                 }
2447                 TreeServer* CheckDupe = FindServer(servername);
2448                 if (CheckDupe)
2449                 {
2450                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2451                         Srv->SendOpers("*** Server connection from \2"+servername+"\2 denied, already exists");
2452                         return false;
2453                 }
2454                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
2455                 ParentOfThis->AddChild(Node);
2456                 params[3] = ":" + params[3];
2457                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2458                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2459                 return true;
2460         }
2461
2462         bool Outbound_Reply_Server(std::deque<std::string> &params)
2463         {
2464                 if (params.size() < 4)
2465                         return false;
2466
2467                 irc::string servername = params[0].c_str();
2468                 std::string sname = params[0];
2469                 std::string password = params[1];
2470                 int hops = atoi(params[2].c_str());
2471
2472                 if (hops)
2473                 {
2474                         this->WriteLine("ERROR :Server too far away for authentication");
2475                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2476                         return false;
2477                 }
2478                 std::string description = params[3];
2479                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2480                 {
2481                         if ((x->Name == servername) && (x->RecvPass == password))
2482                         {
2483                                 TreeServer* CheckDupe = FindServer(sname);
2484                                 if (CheckDupe)
2485                                 {
2486                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2487                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2488                                         return false;
2489                                 }
2490                                 // Begin the sync here. this kickstarts the
2491                                 // other side, waiting in WAIT_AUTH_2 state,
2492                                 // into starting their burst, as it shows
2493                                 // that we're happy.
2494                                 this->LinkState = CONNECTED;
2495                                 // we should add the details of this server now
2496                                 // to the servers tree, as a child of the root
2497                                 // node.
2498                                 TreeServer* Node = new TreeServer(sname,description,TreeRoot,this);
2499                                 TreeRoot->AddChild(Node);
2500                                 params[3] = ":" + params[3];
2501                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2502                                 this->bursting = true;
2503                                 this->DoBurst(Node);
2504                                 return true;
2505                         }
2506                 }
2507                 this->WriteLine("ERROR :Invalid credentials");
2508                 Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2509                 return false;
2510         }
2511
2512         bool Inbound_Server(std::deque<std::string> &params)
2513         {
2514                 if (params.size() < 4)
2515                         return false;
2516
2517                 irc::string servername = params[0].c_str();
2518                 std::string sname = params[0];
2519                 std::string password = params[1];
2520                 int hops = atoi(params[2].c_str());
2521
2522                 if (hops)
2523                 {
2524                         this->WriteLine("ERROR :Server too far away for authentication");
2525                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2526                         return false;
2527                 }
2528                 std::string description = params[3];
2529                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2530                 {
2531                         if ((x->Name == servername) && (x->RecvPass == password))
2532                         {
2533                                 TreeServer* CheckDupe = FindServer(sname);
2534                                 if (CheckDupe)
2535                                 {
2536                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2537                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2538                                         return false;
2539                                 }
2540                                 /* If the config says this link is encrypted, but the remote side
2541                                  * hasnt bothered to send the AES command before SERVER, then we
2542                                  * boot them off as we MUST have this connection encrypted.
2543                                  */
2544                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2545                                 {
2546                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2547                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2548                                         return false;
2549                                 }
2550                                 Srv->SendOpers("*** Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2551                                 this->InboundServerName = sname;
2552                                 this->InboundDescription = description;
2553                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2554                                 // along with the sendpass from this block.
2555                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
2556                                 // move to the next state, we are now waiting for THEM.
2557                                 this->LinkState = WAIT_AUTH_2;
2558                                 return true;
2559                         }
2560                 }
2561                 this->WriteLine("ERROR :Invalid credentials");
2562                 Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2563                 return false;
2564         }
2565
2566         void Split(std::string line, std::deque<std::string> &n)
2567         {
2568                 n.clear();
2569                 irc::tokenstream tokens(line);
2570                 std::string param;
2571                 while ((param = tokens.GetToken()) != "")
2572                         n.push_back(param);
2573                 return;
2574         }
2575
2576         bool ProcessLine(std::string line)
2577         {
2578                 std::deque<std::string> params;
2579                 irc::string command;
2580                 std::string prefix;
2581
2582                 if (line.empty())
2583                         return true;
2584
2585                 line = line.substr(0, line.find_first_of("\r\n"));
2586
2587                 log(DEBUG,"IN: %s", line.c_str());
2588
2589                 this->Split(line.c_str(),params);
2590
2591                 if ((params[0][0] == ':') && (params.size() > 1))
2592                 {
2593                         prefix = params[0].substr(1);
2594                         params.pop_front();
2595                 }
2596
2597                 command = params[0].c_str();
2598                 params.pop_front();
2599
2600                 if ((!this->ctx_in) && (command == "AES"))
2601                 {
2602                         std::string sserv = params[0];
2603                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2604                         {
2605                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2606                                 {
2607                                         this->InitAES(x->EncryptionKey,sserv);
2608                                 }
2609                         }
2610
2611                         return true;
2612                 }
2613                 else if ((this->ctx_in) && (command == "AES"))
2614                 {
2615                         WriteOpers("*** \2AES\2: Encryption already enabled on this connection yet %s is trying to enable it twice!",params[0].c_str());
2616                 }
2617
2618                 switch (this->LinkState)
2619                 {
2620                         TreeServer* Node;
2621
2622                         case WAIT_AUTH_1:
2623                                 // Waiting for SERVER command from remote server. Server initiating
2624                                 // the connection sends the first SERVER command, listening server
2625                                 // replies with theirs if its happy, then if the initiator is happy,
2626                                 // it starts to send its net sync, which starts the merge, otherwise
2627                                 // it sends an ERROR.
2628                                 if (command == "PASS")
2629                                 {
2630                                         /* Silently ignored */
2631                                 }
2632                                 else if (command == "SERVER")
2633                                 {
2634                                         return this->Inbound_Server(params);
2635                                 }
2636                                 else if (command == "ERROR")
2637                                 {
2638                                         return this->Error(params);
2639                                 }
2640                                 else if (command == "USER")
2641                                 {
2642                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2643                                         return false;
2644                                 }
2645                                 else if (command == "CAPAB")
2646                                 {
2647                                         return this->Capab(params);
2648                                 }
2649                                 else if ((command == "U") || (command == "S"))
2650                                 {
2651                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2652                                         return false;
2653                                 }
2654                                 else
2655                                 {
2656                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2657                                         return false;
2658                                 }
2659                         break;
2660                         case WAIT_AUTH_2:
2661                                 // Waiting for start of other side's netmerge to say they liked our
2662                                 // password.
2663                                 if (command == "SERVER")
2664                                 {
2665                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2666                                         // silently ignore.
2667                                         return true;
2668                                 }
2669                                 else if ((command == "U") || (command == "S"))
2670                                 {
2671                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2672                                         return false;
2673                                 }
2674                                 else if (command == "BURST")
2675                                 {
2676                                         if (params.size())
2677                                         {
2678                                                 /* If a time stamp is provided, try and check syncronization */
2679                                                 time_t THEM = atoi(params[0].c_str());
2680                                                 long delta = THEM-time(NULL);
2681                                                 if ((delta < -600) || (delta > 600))
2682                                                 {
2683                                                         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));
2684                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2685                                                         return false;
2686                                                 }
2687                                                 else if ((delta < -60) || (delta > 60))
2688                                                 {
2689                                                         WriteOpers("*** \2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2690                                                 }
2691                                         }
2692                                         this->LinkState = CONNECTED;
2693                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
2694                                         TreeRoot->AddChild(Node);
2695                                         params.clear();
2696                                         params.push_back(InboundServerName);
2697                                         params.push_back("*");
2698                                         params.push_back("1");
2699                                         params.push_back(":"+InboundDescription);
2700                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2701                                         this->bursting = true;
2702                                         this->DoBurst(Node);
2703                                 }
2704                                 else if (command == "ERROR")
2705                                 {
2706                                         return this->Error(params);
2707                                 }
2708                                 else if (command == "CAPAB")
2709                                 {
2710                                         return this->Capab(params);
2711                                 }
2712
2713                         break;
2714                         case LISTENER:
2715                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2716                                 return false;
2717                         break;
2718                         case CONNECTING:
2719                                 if (command == "SERVER")
2720                                 {
2721                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2722                                         // has just sent us their credentials. If we get this far, theyre
2723                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2724                                         // if we're happy with this, we should send our netburst which
2725                                         // kickstarts the merge.
2726                                         return this->Outbound_Reply_Server(params);
2727                                 }
2728                                 else if (command == "ERROR")
2729                                 {
2730                                         return this->Error(params);
2731                                 }
2732                         break;
2733                         case CONNECTED:
2734                                 // This is the 'authenticated' state, when all passwords
2735                                 // have been exchanged and anything past this point is taken
2736                                 // as gospel.
2737
2738                                 if (prefix != "")
2739                                 {
2740                                         std::string direction = prefix;
2741                                         userrec* t = Srv->FindNick(prefix);
2742                                         if (t)
2743                                         {
2744                                                 direction = t->server;
2745                                         }
2746                                         TreeServer* route_back_again = BestRouteTo(direction);
2747                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2748                                         {
2749                                                 if (route_back_again)
2750                                                         log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2751                                                 return true;
2752                                         }
2753
2754                                         /* Fix by brain:
2755                                          * When there is activity on the socket, reset the ping counter so
2756                                          * that we're not wasting bandwidth pinging an active server.
2757                                          */
2758                                         route_back_again->SetNextPingTime(time(NULL) + 120);
2759                                         route_back_again->SetPingFlag();
2760                                 }
2761
2762                                 if (command == "SVSMODE")
2763                                 {
2764                                         /* Services expects us to implement
2765                                          * SVSMODE. In inspircd its the same as
2766                                          * MODE anyway.
2767                                          */
2768                                         command = "MODE";
2769                                 }
2770                                 std::string target = "";
2771                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
2772                                  * working with std::string here.
2773                                  */
2774                                 if ((command == "NICK") && (params.size() > 1))
2775                                 {
2776                                         return this->IntroduceClient(prefix,params);
2777                                 }
2778                                 else if (command == "FJOIN")
2779                                 {
2780                                         return this->ForceJoin(prefix,params);
2781                                 }
2782                                 else if (command == "STATS")
2783                                 {
2784                                         return this->Stats(prefix, params);
2785                                 }
2786                                 else if (command == "SERVER")
2787                                 {
2788                                         return this->RemoteServer(prefix,params);
2789                                 }
2790                                 else if (command == "ERROR")
2791                                 {
2792                                         return this->Error(params);
2793                                 }
2794                                 else if (command == "OPERTYPE")
2795                                 {
2796                                         return this->OperType(prefix,params);
2797                                 }
2798                                 else if (command == "FMODE")
2799                                 {
2800                                         return this->ForceMode(prefix,params);
2801                                 }
2802                                 else if (command == "KILL")
2803                                 {
2804                                         return this->RemoteKill(prefix,params);
2805                                 }
2806                                 else if (command == "FTOPIC")
2807                                 {
2808                                         return this->ForceTopic(prefix,params);
2809                                 }
2810                                 else if (command == "REHASH")
2811                                 {
2812                                         return this->RemoteRehash(prefix,params);
2813                                 }
2814                                 else if (command == "METADATA")
2815                                 {
2816                                         return this->MetaData(prefix,params);
2817                                 }
2818                                 else if (command == "PING")
2819                                 {
2820                                         /*
2821                                          * We just got a ping from a server that's bursting.
2822                                          * This can't be right, so set them to not bursting, and
2823                                          * apply their lines.
2824                                          */
2825                                         if (this->bursting)
2826                                         {
2827                                                 this->bursting = false;
2828                                                 apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2829                                         }
2830                                         if (prefix == "")
2831                                         {
2832                                                 prefix = this->GetName();
2833                                         }
2834                                         return this->LocalPing(prefix,params);
2835                                 }
2836                                 else if (command == "PONG")
2837                                 {
2838                                         /*
2839                                          * We just got a pong from a server that's bursting.
2840                                          * This can't be right, so set them to not bursting, and
2841                                          * apply their lines.
2842                                          */
2843                                         if (this->bursting)
2844                                         {
2845                                                 this->bursting = false;
2846                                                 apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2847                                         }
2848                                         if (prefix == "")
2849                                         {
2850                                                 prefix = this->GetName();
2851                                         }
2852                                         return this->LocalPong(prefix,params);
2853                                 }
2854                                 else if (command == "VERSION")
2855                                 {
2856                                         return this->ServerVersion(prefix,params);
2857                                 }
2858                                 else if (command == "FHOST")
2859                                 {
2860                                         return this->ChangeHost(prefix,params);
2861                                 }
2862                                 else if (command == "FNAME")
2863                                 {
2864                                         return this->ChangeName(prefix,params);
2865                                 }
2866                                 else if (command == "ADDLINE")
2867                                 {
2868                                         return this->AddLine(prefix,params);
2869                                 }
2870                                 else if (command == "SVSNICK")
2871                                 {
2872                                         if (prefix == "")
2873                                         {
2874                                                 prefix = this->GetName();
2875                                         }
2876                                         return this->ForceNick(prefix,params);
2877                                 }
2878                                 else if (command == "IDLE")
2879                                 {
2880                                         return this->Whois(prefix,params);
2881                                 }
2882                                 else if (command == "PUSH")
2883                                 {
2884                                         return this->Push(prefix,params);
2885                                 }
2886                                 else if (command == "TIME")
2887                                 {
2888                                         return this->Time(prefix,params);
2889                                 }
2890                                 else if ((command == "KICK") && (IsServer(prefix)))
2891                                 {
2892                                         std::string sourceserv = this->myhost;
2893                                         if (params.size() == 3)
2894                                         {
2895                                                 userrec* user = Srv->FindNick(params[1]);
2896                                                 chanrec* chan = Srv->FindChannel(params[0]);
2897                                                 if (user && chan)
2898                                                 {
2899                                                         server_kick_channel(user,chan,(char*)params[2].c_str(),false);
2900                                                 }
2901                                         }
2902                                         if (this->InboundServerName != "")
2903                                         {
2904                                                 sourceserv = this->InboundServerName;
2905                                         }
2906                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2907                                 }
2908                                 else if (command == "SVSJOIN")
2909                                 {
2910                                         if (prefix == "")
2911                                         {
2912                                                 prefix = this->GetName();
2913                                         }
2914                                         return this->ServiceJoin(prefix,params);
2915                                 }
2916                                 else if (command == "SQUIT")
2917                                 {
2918                                         if (params.size() == 2)
2919                                         {
2920                                                 this->Squit(FindServer(params[0]),params[1]);
2921                                         }
2922                                         return true;
2923                                 }
2924                                 else if (command == "ENDBURST")
2925                                 {
2926                                         this->bursting = false;
2927                                         apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2928                                         std::string sourceserv = this->myhost;
2929                                         if (this->InboundServerName != "")
2930                                         {
2931                                                 sourceserv = this->InboundServerName;
2932                                         }
2933                                         WriteOpers("*** Received end of netburst from \2%s\2",sourceserv.c_str());
2934                                         return true;
2935                                 }
2936                                 else
2937                                 {
2938                                         // not a special inter-server command.
2939                                         // Emulate the actual user doing the command,
2940                                         // this saves us having a huge ugly parser.
2941                                         userrec* who = Srv->FindNick(prefix);
2942                                         std::string sourceserv = this->myhost;
2943                                         if (this->InboundServerName != "")
2944                                         {
2945                                                 sourceserv = this->InboundServerName;
2946                                         }
2947                                         if (who)
2948                                         {
2949                                                 if ((command == "NICK") && (params.size() > 0))
2950                                                 {
2951                                                         /* On nick messages, check that the nick doesnt
2952                                                          * already exist here. If it does, kill their copy,
2953                                                          * and our copy.
2954                                                          */
2955                                                         userrec* x = Srv->FindNick(params[0]);
2956                                                         if ((x) && (x != who))
2957                                                         {
2958                                                                 std::deque<std::string> p;
2959                                                                 p.push_back(params[0]);
2960                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
2961                                                                 DoOneToMany(Srv->GetServerName(),"KILL",p);
2962                                                                 p.clear();
2963                                                                 p.push_back(prefix);
2964                                                                 p.push_back("Nickname collision");
2965                                                                 DoOneToMany(Srv->GetServerName(),"KILL",p);
2966                                                                 Srv->QuitUser(x,"Nickname collision ("+prefix+" -> "+params[0]+")");
2967                                                                 userrec* y = Srv->FindNick(prefix);
2968                                                                 if (y)
2969                                                                 {
2970                                                                         Srv->QuitUser(y,"Nickname collision");
2971                                                                 }
2972                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2973                                                         }
2974                                                 }
2975                                                 // its a user
2976                                                 target = who->server;
2977                                                 const char* strparams[127];
2978                                                 for (unsigned int q = 0; q < params.size(); q++)
2979                                                 {
2980                                                         strparams[q] = params[q].c_str();
2981                                                 }
2982                                                 if (!Srv->CallCommandHandler(command.c_str(), strparams, params.size(), who))
2983                                                 {
2984                                                         this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
2985                                                         return false;
2986                                                 }
2987                                         }
2988                                         else
2989                                         {
2990                                                 // its not a user. Its either a server, or somethings screwed up.
2991                                                 if (IsServer(prefix))
2992                                                 {
2993                                                         target = Srv->GetServerName();
2994                                                 }
2995                                                 else
2996                                                 {
2997                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
2998                                                         return true;
2999                                                 }
3000                                         }
3001                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3002
3003                                 }
3004                                 return true;
3005                         break;
3006                 }
3007                 return true;
3008         }
3009
3010         virtual std::string GetName()
3011         {
3012                 std::string sourceserv = this->myhost;
3013                 if (this->InboundServerName != "")
3014                 {
3015                         sourceserv = this->InboundServerName;
3016                 }
3017                 return sourceserv;
3018         }
3019
3020         virtual void OnTimeout()
3021         {
3022                 if (this->LinkState == CONNECTING)
3023                 {
3024                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
3025                 }
3026         }
3027
3028         virtual void OnClose()
3029         {
3030                 // Connection closed.
3031                 // If the connection is fully up (state CONNECTED)
3032                 // then propogate a netsplit to all peers.
3033                 std::string quitserver = this->myhost;
3034                 if (this->InboundServerName != "")
3035                 {
3036                         quitserver = this->InboundServerName;
3037                 }
3038                 TreeServer* s = FindServer(quitserver);
3039                 if (s)
3040                 {
3041                         Squit(s,"Remote host closed the connection");
3042                 }
3043                 WriteOpers("Server '\2%s\2' closed the connection.",quitserver.c_str());
3044         }
3045
3046         virtual int OnIncomingConnection(int newsock, char* ip)
3047         {
3048                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3049                  * or discovering if this port is the server port, we don't allow connections from any
3050                  * IPs for which we don't have a link block.
3051                  */
3052                 bool found = false;
3053
3054                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3055                 if (!found)
3056                 {
3057                         for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
3058                                 if (MatchCIDR(ip, (*i).c_str()))
3059                                         found = true;
3060
3061                         if (!found)
3062                         {
3063                                 WriteOpers("Server connection from %s denied (no link blocks with that IP address)", ip);
3064                                 close(newsock);
3065                                 return false;
3066                         }
3067                 }
3068                 TreeSocket* s = new TreeSocket(newsock, ip);
3069                 Srv->AddSocket(s);
3070                 return true;
3071         }
3072 };
3073
3074 /** This class is used to resolve server hostnames during /connect and autoconnect.
3075  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3076  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3077  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3078  * will have an IP address which we can then use to continue our connection.
3079  */
3080 class ServernameResolver : public Resolver
3081 {
3082  private:
3083         /** A copy of the Link tag info for what we're connecting to.
3084          * We take a copy, rather than using a pointer, just in case the
3085          * admin takes the tag away and rehashes while the domain is resolving.
3086          */
3087         Link MyLink;
3088  public:
3089         ServernameResolver(const std::string &hostname, Link x) : Resolver(hostname, DNS_QUERY_FORWARD), MyLink(x)
3090         {
3091                 /* Nothing in here, folks */
3092         }
3093
3094         void OnLookupComplete(const std::string &result)
3095         {
3096                 /* Initiate the connection, now that we have an IP to use.
3097                  * Passing a hostname directly to InspSocket causes it to
3098                  * just bail and set its FD to -1.
3099                  */
3100                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3101                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3102                 {
3103                         TreeSocket* newsocket = new TreeSocket(result,MyLink.Port,false,10,MyLink.Name.c_str());
3104                         if (newsocket->GetFd() > -1)
3105                         {
3106                                 /* We're all OK */
3107                                 Srv->AddSocket(newsocket);
3108                         }
3109                         else
3110                         {
3111                                 /* Something barfed, show the opers */
3112                                 WriteOpers("*** CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3113                                 delete newsocket;
3114                         }
3115                 }
3116         }
3117
3118         void OnError(ResolverError e, const std::string &errormessage)
3119         {
3120                 /* Ooops! */
3121                 WriteOpers("*** CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3122         }
3123 };
3124
3125 class SecurityIPResolver : public Resolver
3126 {
3127  private:
3128         Link MyLink;
3129  public:
3130         SecurityIPResolver(const std::string &hostname, Link x) : Resolver(hostname, DNS_QUERY_FORWARD), MyLink(x)
3131         {
3132         }
3133
3134         void OnLookupComplete(const std::string &result)
3135         {
3136                 log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3137                 ValidIPs.push_back(result);
3138         }
3139
3140         void OnError(ResolverError e, const std::string &errormessage)
3141         {
3142                 log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3143         }
3144 };
3145
3146 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3147 {
3148         for (unsigned int c = 0; c < list.size(); c++)
3149         {
3150                 if (list[c] == server)
3151                 {
3152                         return;
3153                 }
3154         }
3155         list.push_back(server);
3156 }
3157
3158 // returns a list of DIRECT servernames for a specific channel
3159 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3160 {
3161         CUList *ulist = c->GetUsers();
3162         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3163         {
3164                 if (i->second->fd < 0)
3165                 {
3166                         TreeServer* best = BestRouteTo(i->second->server);
3167                         if (best)
3168                                 AddThisServer(best,list);
3169                 }
3170         }
3171         return;
3172 }
3173
3174 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3175 {
3176         TreeServer* omitroute = BestRouteTo(omit);
3177         if ((command == "NOTICE") || (command == "PRIVMSG"))
3178         {
3179                 if (params.size() >= 2)
3180                 {
3181                         /* Prefixes */
3182                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3183                         {
3184                                 params[0] = params[0].substr(1, params[0].length()-1);
3185                         }
3186                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3187                         {
3188                                 // special routing for private messages/notices
3189                                 userrec* d = Srv->FindNick(params[0]);
3190                                 if (d)
3191                                 {
3192                                         std::deque<std::string> par;
3193                                         par.push_back(params[0]);
3194                                         par.push_back(":"+params[1]);
3195                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3196                                         return true;
3197                                 }
3198                         }
3199                         else if (*(params[0].c_str()) == '$')
3200                         {
3201                                 std::deque<std::string> par;
3202                                 par.push_back(params[0]);
3203                                 par.push_back(":"+params[1]);
3204                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3205                                 return true;
3206                         }
3207                         else
3208                         {
3209                                 log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3210                                 chanrec* c = Srv->FindChannel(params[0]);
3211                                 if (c)
3212                                 {
3213                                         std::deque<TreeServer*> list;
3214                                         GetListOfServersForChannel(c,list);
3215                                         log(DEBUG,"Got a list of %d servers",list.size());
3216                                         unsigned int lsize = list.size();
3217                                         for (unsigned int i = 0; i < lsize; i++)
3218                                         {
3219                                                 TreeSocket* Sock = list[i]->GetSocket();
3220                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3221                                                 {
3222                                                         log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3223                                                         Sock->WriteLine(data);
3224                                                 }
3225                                         }
3226                                         return true;
3227                                 }
3228                         }
3229                 }
3230         }
3231         unsigned int items = TreeRoot->ChildCount();
3232         for (unsigned int x = 0; x < items; x++)
3233         {
3234                 TreeServer* Route = TreeRoot->GetChild(x);
3235                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3236                 {
3237                         TreeSocket* Sock = Route->GetSocket();
3238                         Sock->WriteLine(data);
3239                 }
3240         }
3241         return true;
3242 }
3243
3244 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3245 {
3246         TreeServer* omitroute = BestRouteTo(omit);
3247         std::string FullLine = ":" + prefix + " " + command;
3248         unsigned int words = params.size();
3249         for (unsigned int x = 0; x < words; x++)
3250         {
3251                 FullLine = FullLine + " " + params[x];
3252         }
3253         unsigned int items = TreeRoot->ChildCount();
3254         for (unsigned int x = 0; x < items; x++)
3255         {
3256                 TreeServer* Route = TreeRoot->GetChild(x);
3257                 // Send the line IF:
3258                 // The route has a socket (its a direct connection)
3259                 // The route isnt the one to be omitted
3260                 // The route isnt the path to the one to be omitted
3261                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3262                 {
3263                         TreeSocket* Sock = Route->GetSocket();
3264                         Sock->WriteLine(FullLine);
3265                 }
3266         }
3267         return true;
3268 }
3269
3270 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3271 {
3272         std::string FullLine = ":" + prefix + " " + command;
3273         unsigned int words = params.size();
3274         for (unsigned int x = 0; x < words; x++)
3275         {
3276                 FullLine = FullLine + " " + params[x];
3277         }
3278         unsigned int items = TreeRoot->ChildCount();
3279         for (unsigned int x = 0; x < items; x++)
3280         {
3281                 TreeServer* Route = TreeRoot->GetChild(x);
3282                 if (Route->GetSocket())
3283                 {
3284                         TreeSocket* Sock = Route->GetSocket();
3285                         Sock->WriteLine(FullLine);
3286                 }
3287         }
3288         return true;
3289 }
3290
3291 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3292 {
3293         TreeServer* Route = BestRouteTo(target);
3294         if (Route)
3295         {
3296                 std::string FullLine = ":" + prefix + " " + command;
3297                 unsigned int words = params.size();
3298                 for (unsigned int x = 0; x < words; x++)
3299                 {
3300                         FullLine = FullLine + " " + params[x];
3301                 }
3302                 if (Route->GetSocket())
3303                 {
3304                         TreeSocket* Sock = Route->GetSocket();
3305                         Sock->WriteLine(FullLine);
3306                 }
3307                 return true;
3308         }
3309         else
3310         {
3311                 return true;
3312         }
3313 }
3314
3315 std::vector<TreeSocket*> Bindings;
3316
3317 void ReadConfiguration(bool rebind)
3318 {
3319         Conf = new ConfigReader;
3320         if (rebind)
3321         {
3322                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3323                 {
3324                         std::string Type = Conf->ReadValue("bind","type",j);
3325                         std::string IP = Conf->ReadValue("bind","address",j);
3326                         long Port = Conf->ReadInteger("bind","port",j,true);
3327                         if (Type == "servers")
3328                         {
3329                                 if (IP == "*")
3330                                 {
3331                                         IP = "";
3332                                 }
3333                                 TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
3334                                 if (listener->GetState() == I_LISTENING)
3335                                 {
3336                                         Srv->AddSocket(listener);
3337                                         Bindings.push_back(listener);
3338                                 }
3339                                 else
3340                                 {
3341                                         log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3342                                         listener->Close();
3343                                         DELETE(listener);
3344                                 }
3345                         }
3346                 }
3347         }
3348         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3349         HideULines = Conf->ReadFlag("options","hideulines",0);
3350         LinkBlocks.clear();
3351         ValidIPs.clear();
3352         for (int j =0; j < Conf->Enumerate("link"); j++)
3353         {
3354                 Link L;
3355                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3356                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3357                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3358                 L.Port = Conf->ReadInteger("link","port",j,true);
3359                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3360                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3361                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3362                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3363                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3364                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3365                 /* Bugfix by brain, do not allow people to enter bad configurations */
3366                 if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3367                 {
3368                         ValidIPs.push_back(L.IPAddr);
3369
3370                         if (Allow.length())
3371                                 ValidIPs.push_back(Allow);
3372
3373                         /* Needs resolving */
3374                         insp_inaddr binip;
3375                         if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3376                         {
3377                                 try
3378                                 {
3379                                         SecurityIPResolver* sr = new SecurityIPResolver(L.IPAddr, L);
3380                                         Srv->AddResolver(sr);
3381                                 }
3382                                 catch (ModuleException& e)
3383                                 {
3384                                         log(DEBUG,"Error in resolver: %s",e.GetReason());
3385                                 }
3386                         }
3387
3388                         LinkBlocks.push_back(L);
3389                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3390                 }
3391                 else
3392                 {
3393                         if (L.IPAddr == "")
3394                         {
3395                                 log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3396                         }
3397                         else if (L.RecvPass == "")
3398                         {
3399                                 log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3400                         }
3401                         else if (L.SendPass == "")
3402                         {
3403                                 log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3404                         }
3405                         else if (L.Name == "")
3406                         {
3407                                 log(DEFAULT,"Invalid configuration, link tag without a name!");
3408                         }
3409                         else if (!L.Port)
3410                         {
3411                                 log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3412                         }
3413                 }
3414         }
3415         DELETE(Conf);
3416 }
3417
3418
3419 class ModuleSpanningTree : public Module
3420 {
3421         std::vector<TreeSocket*> Bindings;
3422         int line;
3423         int NumServers;
3424         unsigned int max_local;
3425         unsigned int max_global;
3426         cmd_rconnect* command_rconnect;
3427
3428  public:
3429
3430         ModuleSpanningTree(Server* Me)
3431                 : Module::Module(Me), max_local(0), max_global(0)
3432         {
3433                 Srv = Me;
3434                 Bindings.clear();
3435
3436                 // Create the root of the tree
3437                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
3438
3439                 ReadConfiguration(true);
3440
3441                 command_rconnect = new cmd_rconnect(this);
3442                 Srv->AddCommand(command_rconnect);
3443         }
3444
3445         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3446         {
3447                 std::string Parent = TreeRoot->GetName();
3448                 if (Current->GetParent())
3449                 {
3450                         Parent = Current->GetParent()->GetName();
3451                 }
3452                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3453                 {
3454                         if ((HideULines) && (Srv->IsUlined(Current->GetChild(q)->GetName())))
3455                         {
3456                                 if (*user->oper)
3457                                 {
3458                                          ShowLinks(Current->GetChild(q),user,hops+1);
3459                                 }
3460                         }
3461                         else
3462                         {
3463                                 ShowLinks(Current->GetChild(q),user,hops+1);
3464                         }
3465                 }
3466                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3467                 if ((HideULines) && (Srv->IsUlined(Current->GetName())) && (!*user->oper))
3468                         return;
3469                 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());
3470         }
3471
3472         int CountLocalServs()
3473         {
3474                 return TreeRoot->ChildCount();
3475         }
3476
3477         int CountServs()
3478         {
3479                 return serverlist.size();
3480         }
3481
3482         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3483         {
3484                 ShowLinks(TreeRoot,user,0);
3485                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
3486                 return;
3487         }
3488
3489         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3490         {
3491                 unsigned int n_users = usercnt();
3492
3493                 /* Only update these when someone wants to see them, more efficient */
3494                 if ((unsigned int)local_count() > max_local)
3495                         max_local = local_count();
3496                 if (n_users > max_global)
3497                         max_global = n_users;
3498
3499                 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());
3500                 if (usercount_opers())
3501                         WriteServ(user->fd,"252 %s %d :operator(s) online",user->nick,usercount_opers());
3502                 if (usercount_unknown())
3503                         WriteServ(user->fd,"253 %s %d :unknown connections",user->nick,usercount_unknown());
3504                 if (chancount())
3505                         WriteServ(user->fd,"254 %s %d :channels formed",user->nick,chancount());
3506                 WriteServ(user->fd,"254 %s :I have %d clients and %d servers",user->nick,local_count(),this->CountLocalServs());
3507                 WriteServ(user->fd,"265 %s :Current Local Users: %d  Max: %d",user->nick,local_count(),max_local);
3508                 WriteServ(user->fd,"266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3509                 return;
3510         }
3511
3512         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3513
3514         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3515         {
3516                 if (line < 128)
3517                 {
3518                         for (int t = 0; t < depth; t++)
3519                         {
3520                                 matrix[line][t] = ' ';
3521                         }
3522
3523                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3524                         // a 'Spacer' String to compensate.
3525                         char spacer[40];
3526
3527                         memset(spacer,' ',40);
3528                         if ((40 - Current->GetName().length() - depth) > 1) {
3529                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3530                         }
3531                         else
3532                         {
3533                                 spacer[5] = '\0';
3534                         }
3535
3536                         float percent;
3537                         char text[80];
3538                         if (clientlist.size() == 0) {
3539                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3540                                 percent = 0;
3541                         }
3542                         else
3543                         {
3544                                 percent = ((float)Current->GetUserCount() / (float)clientlist.size()) * 100;
3545                         }
3546                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3547                         totusers += Current->GetUserCount();
3548                         totservers++;
3549                         strlcpy(&matrix[line][depth],text,80);
3550                         line++;
3551                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3552                         {
3553                                 if ((HideULines) && (Srv->IsUlined(Current->GetChild(q)->GetName())))
3554                                 {
3555                                         if (*user->oper)
3556                                         {
3557                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3558                                         }
3559                                 }
3560                                 else
3561                                 {
3562                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3563                                 }
3564                         }
3565                 }
3566         }
3567
3568         int HandleStats(const char** parameters, int pcnt, userrec* user)
3569         {
3570                 if (pcnt > 1)
3571                 {
3572                         /* Remote STATS, the server is within the 2nd parameter */
3573                         std::deque<std::string> params;
3574                         params.push_back(parameters[0]);
3575                         params.push_back(parameters[1]);
3576                         /* Send it out remotely, generate no reply yet */
3577                         TreeServer* s = FindServerMask(parameters[1]);
3578                         if (s)
3579                         {
3580                                 params[1] = s->GetName();
3581                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
3582                         }
3583                         else
3584                         {
3585                                 WriteServ(user->fd, "402 %s %s :No such server", user->nick, parameters[0]);
3586                         }
3587                         return 1;
3588                 }
3589                 return 0;
3590         }
3591
3592         // Ok, prepare to be confused.
3593         // After much mulling over how to approach this, it struck me that
3594         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3595         // keeping track of a ton of ascii characters, and line by line
3596         // under recursion working out where to place them using multiplications
3597         // and divisons, we instead render the map onto a backplane of characters
3598         // (a character matrix), then draw the branches as a series of "L" shapes
3599         // from the nodes. This is not only friendlier on CPU it uses less stack.
3600
3601         void HandleMap(const char** parameters, int pcnt, userrec* user)
3602         {
3603                 // This array represents a virtual screen which we will
3604                 // "scratch" draw to, as the console device of an irc
3605                 // client does not provide for a proper terminal.
3606                 float totusers = 0;
3607                 float totservers = 0;
3608                 char matrix[128][80];
3609                 for (unsigned int t = 0; t < 128; t++)
3610                 {
3611                         matrix[t][0] = '\0';
3612                 }
3613                 line = 0;
3614                 // The only recursive bit is called here.
3615                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3616                 // Process each line one by one. The algorithm has a limit of
3617                 // 128 servers (which is far more than a spanning tree should have
3618                 // anyway, so we're ok). This limit can be raised simply by making
3619                 // the character matrix deeper, 128 rows taking 10k of memory.
3620                 for (int l = 1; l < line; l++)
3621                 {
3622                         // scan across the line looking for the start of the
3623                         // servername (the recursive part of the algorithm has placed
3624                         // the servers at indented positions depending on what they
3625                         // are related to)
3626                         int first_nonspace = 0;
3627                         while (matrix[l][first_nonspace] == ' ')
3628                         {
3629                                 first_nonspace++;
3630                         }
3631                         first_nonspace--;
3632                         // Draw the `- (corner) section: this may be overwritten by
3633                         // another L shape passing along the same vertical pane, becoming
3634                         // a |- (branch) section instead.
3635                         matrix[l][first_nonspace] = '-';
3636                         matrix[l][first_nonspace-1] = '`';
3637                         int l2 = l - 1;
3638                         // Draw upwards until we hit the parent server, causing possibly
3639                         // other corners (`-) to become branches (|-)
3640                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3641                         {
3642                                 matrix[l2][first_nonspace-1] = '|';
3643                                 l2--;
3644                         }
3645                 }
3646                 // dump the whole lot to the user. This is the easy bit, honest.
3647                 for (int t = 0; t < line; t++)
3648                 {
3649                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
3650                 }
3651                 float avg_users = totusers / totservers;
3652                 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);
3653         WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
3654                 return;
3655         }
3656
3657         int HandleSquit(const char** parameters, int pcnt, userrec* user)
3658         {
3659                 TreeServer* s = FindServerMask(parameters[0]);
3660                 if (s)
3661                 {
3662                         if (s == TreeRoot)
3663                         {
3664                                  WriteServ(user->fd,"NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
3665                                 return 1;
3666                         }
3667                         TreeSocket* sock = s->GetSocket();
3668                         if (sock)
3669                         {
3670                                 log(DEBUG,"Splitting server %s",s->GetName().c_str());
3671                                 WriteOpers("*** SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
3672                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
3673                                 Srv->RemoveSocket(sock);
3674                         }
3675                         else
3676                         {
3677                                 WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
3678                         }
3679                 }
3680                 else
3681                 {
3682                          WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
3683                 }
3684                 return 1;
3685         }
3686
3687         int HandleTime(const char** parameters, int pcnt, userrec* user)
3688         {
3689                 if ((IS_LOCAL(user)) && (pcnt))
3690                 {
3691                         TreeServer* found = FindServerMask(parameters[0]);
3692                         if (found)
3693                         {
3694                                 // we dont' override for local server
3695                                 if (found == TreeRoot)
3696                                         return 0;
3697
3698                                 std::deque<std::string> params;
3699                                 params.push_back(found->GetName());
3700                                 params.push_back(user->nick);
3701                                 DoOneToOne(Srv->GetServerName(),"TIME",params,found->GetName());
3702                         }
3703                         else
3704                         {
3705                                 WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
3706                         }
3707                 }
3708                 return 1;
3709         }
3710
3711         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
3712         {
3713                 if ((IS_LOCAL(user)) && (pcnt > 1))
3714                 {
3715                         userrec* remote = Srv->FindNick(parameters[1]);
3716                         if ((remote) && (remote->fd < 0))
3717                         {
3718                                 std::deque<std::string> params;
3719                                 params.push_back(parameters[1]);
3720                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
3721                                 return 1;
3722                         }
3723                         else if (!remote)
3724                         {
3725                                 WriteServ(user->fd,"401 %s %s :No such nick/channel",user->nick, parameters[1]);
3726                                 WriteServ(user->fd,"318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
3727                                 return 1;
3728                         }
3729                 }
3730                 return 0;
3731         }
3732
3733         void DoPingChecks(time_t curtime)
3734         {
3735                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
3736                 {
3737                         TreeServer* serv = TreeRoot->GetChild(j);
3738                         TreeSocket* sock = serv->GetSocket();
3739                         if (sock)
3740                         {
3741                                 if (curtime >= serv->NextPingTime())
3742                                 {
3743                                         if (serv->AnsweredLastPing())
3744                                         {
3745                                                 sock->WriteLine(":"+Srv->GetServerName()+" PING "+serv->GetName());
3746                                                 serv->SetNextPingTime(curtime + 120);
3747                                         }
3748                                         else
3749                                         {
3750                                                 // they didnt answer, boot them
3751                                                 WriteOpers("*** Server \002%s\002 pinged out",serv->GetName().c_str());
3752                                                 sock->Squit(serv,"Ping timeout");
3753                                                 Srv->RemoveSocket(sock);
3754                                                 return;
3755                                         }
3756                                 }
3757                         }
3758                 }
3759         }
3760
3761         void AutoConnectServers(time_t curtime)
3762         {
3763                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3764                 {
3765                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
3766                         {
3767                                 log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
3768                                 x->NextConnectTime = curtime + x->AutoConnect;
3769                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3770                                 if (!CheckDupe)
3771                                 {
3772                                         // an autoconnected server is not connected. Check if its time to connect it
3773                                         WriteOpers("*** AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
3774
3775                                         insp_inaddr binip;
3776
3777                                         /* Do we already have an IP? If so, no need to resolve it. */
3778                                         if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
3779                                         {
3780                                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name.c_str());
3781                                                 if (newsocket->GetFd() > -1)
3782                                                 {
3783                                                         Srv->AddSocket(newsocket);
3784                                                 }
3785                                                 else
3786                                                 {
3787                                                         WriteOpers("*** AUTOCONNECT: Error autoconnecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
3788                                                         delete newsocket;
3789                                                 }
3790                                         }
3791                                         else
3792                                         {
3793                                                 try
3794                                                 {
3795                                                         ServernameResolver* snr = new ServernameResolver(x->IPAddr, *x);
3796                                                         Srv->AddResolver(snr);
3797                                                 }
3798                                                 catch (ModuleException& e)
3799                                                 {
3800                                                         log(DEBUG,"Error in resolver: %s",e.GetReason());
3801                                                 }
3802                                         }
3803
3804                                 }
3805                         }
3806                 }
3807         }
3808
3809         int HandleVersion(const char** parameters, int pcnt, userrec* user)
3810         {
3811                 // we've already checked if pcnt > 0, so this is safe
3812                 TreeServer* found = FindServerMask(parameters[0]);
3813                 if (found)
3814                 {
3815                         std::string Version = found->GetVersion();
3816                         WriteServ(user->fd,"351 %s :%s",user->nick,Version.c_str());
3817                         if (found == TreeRoot)
3818                         {
3819                                 std::stringstream out(Config->data005);
3820                                 std::string token = "";
3821                                 std::string line5 = "";
3822                                 int token_counter = 0;
3823
3824                                 while (!out.eof())
3825                                 {
3826                                         out >> token;
3827                                         line5 = line5 + token + " ";
3828                                         token_counter++;
3829
3830                                         if ((token_counter >= 13) || (out.eof() == true))
3831                                         {
3832                                                 WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
3833                                                 line5 = "";
3834                                                 token_counter = 0;
3835                                         }
3836                                 }
3837                         }
3838                 }
3839                 else
3840                 {
3841                         WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
3842                 }
3843                 return 1;
3844         }
3845
3846         int HandleConnect(const char** parameters, int pcnt, userrec* user)
3847         {
3848                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3849                 {
3850                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
3851                         {
3852                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3853                                 if (!CheckDupe)
3854                                 {
3855                                         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);
3856                                         insp_inaddr binip;
3857
3858                                         /* Do we already have an IP? If so, no need to resolve it. */
3859                                         if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
3860                                         {
3861                                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name.c_str());
3862                                                 if (newsocket->GetFd() > -1)
3863                                                 {
3864                                                         Srv->AddSocket(newsocket);
3865                                                 }
3866                                                 else
3867                                                 {
3868                                                         WriteOpers("*** CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
3869                                                         delete newsocket;
3870                                                 }
3871                                         }
3872                                         else
3873                                         {
3874                                                 try
3875                                                 {
3876                                                         ServernameResolver* snr = new ServernameResolver(x->IPAddr, *x);
3877                                                         Srv->AddResolver(snr);
3878                                                 }
3879                                                 catch (ModuleException& e)
3880                                                 {
3881                                                         log(DEBUG,"Error in resolver: %s",e.GetReason());
3882                                                 }
3883                                         }
3884                                         return 1;
3885                                 }
3886                                 else
3887                                 {
3888                                         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());
3889                                         return 1;
3890                                 }
3891                         }
3892                 }
3893                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
3894                 return 1;
3895         }
3896
3897         virtual int OnStats(char statschar, userrec* user, string_list &results)
3898         {
3899                 if (statschar == 'c')
3900                 {
3901                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
3902                         {
3903                                 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');
3904                                 results.push_back(Srv->GetServerName()+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
3905                         }
3906                         results.push_back(Srv->GetServerName()+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
3907                         WriteOpers("*** Notice: %s '%c' requested by %s (%s@%s)",(!strcmp(user->server,Config->ServerName) ? "Stats" : "Remote stats"),statschar,user->nick,user->ident,user->host);
3908                         return 1;
3909                 }
3910                 return 0;
3911         }
3912
3913         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated)
3914         {
3915                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
3916                 if (!validated)
3917                         return 0;
3918
3919                 if (command == "CONNECT")
3920                 {
3921                         return this->HandleConnect(parameters,pcnt,user);
3922                 }
3923                 else if (command == "STATS")
3924                 {
3925                         return this->HandleStats(parameters,pcnt,user);
3926                 }
3927                 else if (command == "SQUIT")
3928                 {
3929                         return this->HandleSquit(parameters,pcnt,user);
3930                 }
3931                 else if (command == "MAP")
3932                 {
3933                         this->HandleMap(parameters,pcnt,user);
3934                         return 1;
3935                 }
3936                 else if ((command == "TIME") && (pcnt > 0))
3937                 {
3938                         return this->HandleTime(parameters,pcnt,user);
3939                 }
3940                 else if (command == "LUSERS")
3941                 {
3942                         this->HandleLusers(parameters,pcnt,user);
3943                         return 1;
3944                 }
3945                 else if (command == "LINKS")
3946                 {
3947                         this->HandleLinks(parameters,pcnt,user);
3948                         return 1;
3949                 }
3950                 else if (command == "WHOIS")
3951                 {
3952                         if (pcnt > 1)
3953                         {
3954                                 // remote whois
3955                                 return this->HandleRemoteWhois(parameters,pcnt,user);
3956                         }
3957                 }
3958                 else if ((command == "VERSION") && (pcnt > 0))
3959                 {
3960                         this->HandleVersion(parameters,pcnt,user);
3961                         return 1;
3962                 }
3963                 else if (Srv->IsValidModuleCommand(command, pcnt, user))
3964                 {
3965                         // this bit of code cleverly routes all module commands
3966                         // to all remote severs *automatically* so that modules
3967                         // can just handle commands locally, without having
3968                         // to have any special provision in place for remote
3969                         // commands and linking protocols.
3970                         std::deque<std::string> params;
3971                         params.clear();
3972                         for (int j = 0; j < pcnt; j++)
3973                         {
3974                                 if (strchr(parameters[j],' '))
3975                                 {
3976                                         params.push_back(":" + std::string(parameters[j]));
3977                                 }
3978                                 else
3979                                 {
3980                                         params.push_back(std::string(parameters[j]));
3981                                 }
3982                         }
3983                         log(DEBUG,"Globally route '%s'",command.c_str());
3984                         DoOneToMany(user->nick,command,params);
3985                 }
3986                 return 0;
3987         }
3988
3989         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
3990         {
3991                 TreeServer* s = FindServer(servername);
3992                 if (s)
3993                 {
3994                         description = s->GetDesc();
3995                 }
3996         }
3997
3998         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
3999         {
4000                 if (IS_LOCAL(source))
4001                 {
4002                         std::deque<std::string> params;
4003                         params.push_back(dest->nick);
4004                         params.push_back(channel->name);
4005                         DoOneToMany(source->nick,"INVITE",params);
4006                 }
4007         }
4008
4009         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4010         {
4011                 std::deque<std::string> params;
4012                 params.push_back(chan->name);
4013                 params.push_back(":"+topic);
4014                 DoOneToMany(user->nick,"TOPIC",params);
4015         }
4016
4017         virtual void OnWallops(userrec* user, const std::string &text)
4018         {
4019                 if (IS_LOCAL(user))
4020                 {
4021                         std::deque<std::string> params;
4022                         params.push_back(":"+text);
4023                         DoOneToMany(user->nick,"WALLOPS",params);
4024                 }
4025         }
4026
4027         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4028         {
4029                 if (target_type == TYPE_USER)
4030                 {
4031                         userrec* d = (userrec*)dest;
4032                         if ((d->fd < 0) && (IS_LOCAL(user)))
4033                         {
4034                                 std::deque<std::string> params;
4035                                 params.clear();
4036                                 params.push_back(d->nick);
4037                                 params.push_back(":"+text);
4038                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4039                         }
4040                 }
4041                 else if (target_type == TYPE_CHANNEL)
4042                 {
4043                         if (IS_LOCAL(user))
4044                         {
4045                                 chanrec *c = (chanrec*)dest;
4046                                 std::string cname = c->name;
4047                                 if (status)
4048                                         cname = status + cname;
4049                                 std::deque<TreeServer*> list;
4050                                 GetListOfServersForChannel(c,list);
4051                                 unsigned int ucount = list.size();
4052                                 for (unsigned int i = 0; i < ucount; i++)
4053                                 {
4054                                         TreeSocket* Sock = list[i]->GetSocket();
4055                                         if (Sock)
4056                                                 Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4057                                 }
4058                         }
4059                 }
4060                 else if (target_type == TYPE_SERVER)
4061                 {
4062                         if (IS_LOCAL(user))
4063                         {
4064                                 char* target = (char*)dest;
4065                                 std::deque<std::string> par;
4066                                 par.push_back(target);
4067                                 par.push_back(":"+text);
4068                                 DoOneToMany(user->nick,"NOTICE",par);
4069                         }
4070                 }
4071         }
4072
4073         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4074         {
4075                 if (target_type == TYPE_USER)
4076                 {
4077                         // route private messages which are targetted at clients only to the server
4078                         // which needs to receive them
4079                         userrec* d = (userrec*)dest;
4080                         if ((d->fd < 0) && (IS_LOCAL(user)))
4081                         {
4082                                 std::deque<std::string> params;
4083                                 params.clear();
4084                                 params.push_back(d->nick);
4085                                 params.push_back(":"+text);
4086                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4087                         }
4088                 }
4089                 else if (target_type == TYPE_CHANNEL)
4090                 {
4091                         if (IS_LOCAL(user))
4092                         {
4093                                 chanrec *c = (chanrec*)dest;
4094                                 std::string cname = c->name;
4095                                 if (status)
4096                                         cname = status + cname;
4097                                 std::deque<TreeServer*> list;
4098                                 GetListOfServersForChannel(c,list);
4099                                 unsigned int ucount = list.size();
4100                                 for (unsigned int i = 0; i < ucount; i++)
4101                                 {
4102                                         TreeSocket* Sock = list[i]->GetSocket();
4103                                         if (Sock)
4104                                                 Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4105                                 }
4106                         }
4107                 }
4108                 else if (target_type == TYPE_SERVER)
4109                 {
4110                         if (IS_LOCAL(user))
4111                         {
4112                                 char* target = (char*)dest;
4113                                 std::deque<std::string> par;
4114                                 par.push_back(target);
4115                                 par.push_back(":"+text);
4116                                 DoOneToMany(user->nick,"PRIVMSG",par);
4117                         }
4118                 }
4119         }
4120
4121         virtual void OnBackgroundTimer(time_t curtime)
4122         {
4123                 AutoConnectServers(curtime);
4124                 DoPingChecks(curtime);
4125         }
4126
4127         virtual void OnUserJoin(userrec* user, chanrec* channel)
4128         {
4129                 // Only do this for local users
4130                 if (IS_LOCAL(user))
4131                 {
4132                         std::deque<std::string> params;
4133                         params.clear();
4134                         params.push_back(channel->name);
4135
4136                         if (channel->GetUserCounter() > 1)
4137                         {
4138                                 // not the first in the channel
4139                                 DoOneToMany(user->nick,"JOIN",params);
4140                         }
4141                         else
4142                         {
4143                                 // first in the channel, set up their permissions
4144                                 // and the channel TS with FJOIN.
4145                                 char ts[24];
4146                                 snprintf(ts,24,"%lu",(unsigned long)channel->age);
4147                                 params.clear();
4148                                 params.push_back(channel->name);
4149                                 params.push_back(ts);
4150                                 params.push_back("@"+std::string(user->nick));
4151                                 DoOneToMany(Srv->GetServerName(),"FJOIN",params);
4152                         }
4153                 }
4154         }
4155
4156         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4157         {
4158                 // only occurs for local clients
4159                 if (user->registered != REG_ALL)
4160                         return;
4161                 std::deque<std::string> params;
4162                 params.push_back(newhost);
4163                 DoOneToMany(user->nick,"FHOST",params);
4164         }
4165
4166         virtual void OnChangeName(userrec* user, const std::string &gecos)
4167         {
4168                 // only occurs for local clients
4169                 if (user->registered != REG_ALL)
4170                         return;
4171                 std::deque<std::string> params;
4172                 params.push_back(gecos);
4173                 DoOneToMany(user->nick,"FNAME",params);
4174         }
4175
4176         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4177         {
4178                 if (IS_LOCAL(user))
4179                 {
4180                         std::deque<std::string> params;
4181                         params.push_back(channel->name);
4182                         if (partmessage != "")
4183                                 params.push_back(":"+partmessage);
4184                         DoOneToMany(user->nick,"PART",params);
4185                 }
4186         }
4187
4188         virtual void OnUserConnect(userrec* user)
4189         {
4190                 char agestr[MAXBUF];
4191                 if (IS_LOCAL(user))
4192                 {
4193                         std::deque<std::string> params;
4194                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4195                         params.push_back(agestr);
4196                         params.push_back(user->nick);
4197                         params.push_back(user->host);
4198                         params.push_back(user->dhost);
4199                         params.push_back(user->ident);
4200                         params.push_back("+"+std::string(user->FormatModes()));
4201                         params.push_back(user->GetIPString());
4202                         params.push_back(":"+std::string(user->fullname));
4203                         DoOneToMany(Srv->GetServerName(),"NICK",params);
4204
4205                         // User is Local, change needs to be reflected!
4206                         TreeServer* SourceServer = FindServer(user->server);
4207                         if (SourceServer)
4208                         {
4209                                 SourceServer->AddUserCount();
4210                         }
4211
4212                 }
4213         }
4214
4215         virtual void OnUserQuit(userrec* user, const std::string &reason)
4216         {
4217                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4218                 {
4219                         std::deque<std::string> params;
4220                         params.push_back(":"+reason);
4221                         DoOneToMany(user->nick,"QUIT",params);
4222                 }
4223                 // Regardless, We need to modify the user Counts..
4224                 TreeServer* SourceServer = FindServer(user->server);
4225                 if (SourceServer)
4226                 {
4227                         SourceServer->DelUserCount();
4228                 }
4229
4230         }
4231
4232         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4233         {
4234                 if (IS_LOCAL(user))
4235                 {
4236                         std::deque<std::string> params;
4237                         params.push_back(user->nick);
4238                         DoOneToMany(oldnick,"NICK",params);
4239                 }
4240         }
4241
4242         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4243         {
4244                 if ((source) && (IS_LOCAL(source)))
4245                 {
4246                         std::deque<std::string> params;
4247                         params.push_back(chan->name);
4248                         params.push_back(user->nick);
4249                         params.push_back(":"+reason);
4250                         DoOneToMany(source->nick,"KICK",params);
4251                 }
4252                 else if (!source)
4253                 {
4254                         std::deque<std::string> params;
4255                         params.push_back(chan->name);
4256                         params.push_back(user->nick);
4257                         params.push_back(":"+reason);
4258                         DoOneToMany(Srv->GetServerName(),"KICK",params);
4259                 }
4260         }
4261
4262         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4263         {
4264                 std::deque<std::string> params;
4265                 params.push_back(dest->nick);
4266                 params.push_back(":"+reason);
4267                 DoOneToMany(source->nick,"KILL",params);
4268         }
4269
4270         virtual void OnRehash(const std::string &parameter)
4271         {
4272                 if (parameter != "")
4273                 {
4274                         std::deque<std::string> params;
4275                         params.push_back(parameter);
4276                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
4277                         // check for self
4278                         if (Srv->MatchText(Srv->GetServerName(),parameter))
4279                         {
4280                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
4281                                 Srv->RehashServer();
4282                         }
4283                 }
4284                 ReadConfiguration(false);
4285         }
4286
4287         // note: the protocol does not allow direct umode +o except
4288         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4289         // locally.
4290         virtual void OnOper(userrec* user, const std::string &opertype)
4291         {
4292                 if (IS_LOCAL(user))
4293                 {
4294                         std::deque<std::string> params;
4295                         params.push_back(opertype);
4296                         DoOneToMany(user->nick,"OPERTYPE",params);
4297                 }
4298         }
4299
4300         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4301         {
4302                 if (IS_LOCAL(source))
4303                 {
4304                         char type[8];
4305                         snprintf(type,8,"%cLINE",linetype);
4306                         std::string stype = type;
4307                         if (adding)
4308                         {
4309                                 char sduration[MAXBUF];
4310                                 snprintf(sduration,MAXBUF,"%ld",duration);
4311                                 std::deque<std::string> params;
4312                                 params.push_back(host);
4313                                 params.push_back(sduration);
4314                                 params.push_back(":"+reason);
4315                                 DoOneToMany(source->nick,stype,params);
4316                         }
4317                         else
4318                         {
4319                                 std::deque<std::string> params;
4320                                 params.push_back(host);
4321                                 DoOneToMany(source->nick,stype,params);
4322                         }
4323                 }
4324         }
4325
4326         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4327         {
4328                 OnLine(source,hostmask,true,'G',duration,reason);
4329         }
4330
4331         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4332         {
4333                 OnLine(source,ipmask,true,'Z',duration,reason);
4334         }
4335
4336         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4337         {
4338                 OnLine(source,nickmask,true,'Q',duration,reason);
4339         }
4340
4341         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4342         {
4343                 OnLine(source,hostmask,true,'E',duration,reason);
4344         }
4345
4346         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4347         {
4348                 OnLine(source,hostmask,false,'G',0,"");
4349         }
4350
4351         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4352         {
4353                 OnLine(source,ipmask,false,'Z',0,"");
4354         }
4355
4356         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4357         {
4358                 OnLine(source,nickmask,false,'Q',0,"");
4359         }
4360
4361         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4362         {
4363                 OnLine(source,hostmask,false,'E',0,"");
4364         }
4365
4366         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4367         {
4368                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4369                 {
4370                         if (target_type == TYPE_USER)
4371                         {
4372                                 userrec* u = (userrec*)dest;
4373                                 std::deque<std::string> params;
4374                                 params.push_back(u->nick);
4375                                 params.push_back(text);
4376                                 DoOneToMany(user->nick,"MODE",params);
4377                         }
4378                         else
4379                         {
4380                                 chanrec* c = (chanrec*)dest;
4381                                 std::deque<std::string> params;
4382                                 params.push_back(c->name);
4383                                 params.push_back(text);
4384                                 DoOneToMany(user->nick,"MODE",params);
4385                         }
4386                 }
4387         }
4388
4389         virtual void OnSetAway(userrec* user)
4390         {
4391                 if (IS_LOCAL(user))
4392                 {
4393                         std::deque<std::string> params;
4394                         params.push_back(":"+std::string(user->awaymsg));
4395                         DoOneToMany(user->nick,"AWAY",params);
4396                 }
4397         }
4398
4399         virtual void OnCancelAway(userrec* user)
4400         {
4401                 if (IS_LOCAL(user))
4402                 {
4403                         std::deque<std::string> params;
4404                         params.clear();
4405                         DoOneToMany(user->nick,"AWAY",params);
4406                 }
4407         }
4408
4409         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4410         {
4411                 TreeSocket* s = (TreeSocket*)opaque;
4412                 if (target)
4413                 {
4414                         if (target_type == TYPE_USER)
4415                         {
4416                                 userrec* u = (userrec*)target;
4417                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4418                         }
4419                         else
4420                         {
4421                                 chanrec* c = (chanrec*)target;
4422                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4423                         }
4424                 }
4425         }
4426
4427         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4428         {
4429                 TreeSocket* s = (TreeSocket*)opaque;
4430                 if (target)
4431                 {
4432                         if (target_type == TYPE_USER)
4433                         {
4434                                 userrec* u = (userrec*)target;
4435                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA "+u->nick+" "+extname+" :"+extdata);
4436                         }
4437                         else if (target_type == TYPE_OTHER)
4438                         {
4439                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA * "+extname+" :"+extdata);
4440                         }
4441                         else if (target_type == TYPE_CHANNEL)
4442                         {
4443                                 chanrec* c = (chanrec*)target;
4444                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA "+c->name+" "+extname+" :"+extdata);
4445                         }
4446                 }
4447         }
4448
4449         virtual void OnEvent(Event* event)
4450         {
4451                 if (event->GetEventID() == "send_metadata")
4452                 {
4453                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4454                         if (params->size() < 3)
4455                                 return;
4456                         (*params)[2] = ":" + (*params)[2];
4457                         DoOneToMany(Srv->GetServerName(),"METADATA",*params);
4458                 }
4459                 else if (event->GetEventID() == "send_mode")
4460                 {
4461                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4462                         if (params->size() < 2)
4463                                 return;
4464                         // Insert the TS value of the object, either userrec or chanrec
4465                         time_t ourTS = 0;
4466                         userrec* a = Srv->FindNick((*params)[0]);
4467                         if (a)
4468                         {
4469                                 ourTS = a->age;
4470                         }
4471                         else
4472                         {
4473                                 chanrec* a = Srv->FindChannel((*params)[0]);
4474                                 if (a)
4475                                 {
4476                                         ourTS = a->age;
4477                                 }
4478                         }
4479                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4480                         DoOneToMany(Srv->GetServerName(),"FMODE",*params);
4481                 }
4482         }
4483
4484         virtual ~ModuleSpanningTree()
4485         {
4486         }
4487
4488         virtual Version GetVersion()
4489         {
4490                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
4491         }
4492
4493         void Implements(char* List)
4494         {
4495                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
4496                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
4497                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
4498                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
4499                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
4500                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
4501                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = 1;
4502         }
4503
4504         /* It is IMPORTANT that m_spanningtree is the last module in the chain
4505          * so that any activity it sees is FINAL, e.g. we arent going to send out
4506          * a NICK message before m_cloaking has finished putting the +x on the user,
4507          * etc etc.
4508          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
4509          * the module call queue.
4510          */
4511         Priority Prioritize()
4512         {
4513                 return PRIORITY_LAST;
4514         }
4515 };
4516
4517
4518 class ModuleSpanningTreeFactory : public ModuleFactory
4519 {
4520  public:
4521         ModuleSpanningTreeFactory()
4522         {
4523         }
4524
4525         ~ModuleSpanningTreeFactory()
4526         {
4527         }
4528
4529         virtual Module * CreateModule(Server* Me)
4530         {
4531                 TreeProtocolModule = new ModuleSpanningTree(Me);
4532                 return TreeProtocolModule;
4533         }
4534
4535 };
4536
4537
4538 extern "C" void * init_module( void )
4539 {
4540         return new ModuleSpanningTreeFactory;
4541 }