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 #include "configreader.h"
  20 #include "users.h"
  21 #include "channels.h"
  22 #include "modules.h"
  23 #include "commands/cmd_whois.h"
  24 #include "commands/cmd_stats.h"
  25 #include "socket.h"
  26 #include "inspircd.h"
  27 #include "wildcard.h"
  28 #include "xline.h"
  29 #include "aes.h"
  30
  31 /** If you make a change which breaks the protocol, increment this.
  32  * If you  completely change the protocol, completely change the number.
  33  */
  34 const long ProtocolVersion = 1101;
  35
  36 /*
  37  * The server list in InspIRCd is maintained as two structures
  38  * which hold the data in different ways. Most of the time, we
  39  * want to very quicky obtain three pieces of information:
  40  *
  41  * (1) The information on a server
  42  * (2) The information on the server we must send data through
  43  *     to actually REACH the server we're after
  44  * (3) Potentially, the child/parent objects of this server
  45  *
  46  * The InspIRCd spanning protocol provides easy access to these
  47  * by storing the data firstly in a recursive structure, where
  48  * each item references its parent item, and a dynamic list
  49  * of child items, and another structure which stores the items
  50  * hashed, linearly. This means that if we want to find a server
  51  * by name quickly, we can look it up in the hash, avoiding
  52  * any O(n) lookups. If however, during a split or sync, we want
  53  * to apply an operation to a server, and any of its child objects
  54  * we can resort to recursion to walk the tree structure.
  55  * Any socket can have one of five states at any one time.
  56  * The LISTENER state indicates a socket which is listening
  57  * for connections. It cannot receive data itself, only incoming
  58  * sockets.
  59  * The CONNECTING state indicates an outbound socket which is
  60  * waiting to be writeable.
  61  * The WAIT_AUTH_1 state indicates the socket is outbound and
  62  * has successfully connected, but has not yet sent and received
  63  * SERVER strings.
  64  * The WAIT_AUTH_2 state indicates that the socket is inbound
  65  * (allocated by a LISTENER) but has not yet sent and received
  66  * SERVER strings.
  67  * The CONNECTED state represents a fully authorized, fully
  68  * connected server.
  69  */
  70 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  71
  72 /* Foward declarations */
  73 class TreeServer;
  74 class TreeSocket;
  75 class Link;
  76 class ModuleSpanningTree;
  77
  78 /* This hash_map holds the hash equivalent of the server
  79  * tree, used for rapid linear lookups.
  80  */
  81 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
  82
  83
  84 /** The Link class might as well be a struct,
  85  * but this is C++ and we don't believe in structs (!).
  86  * It holds the entire information of one <link>
  87  * tag from the main config file. We maintain a list
  88  * of them, and populate the list on rehash/load.
  89  */
  90 class Link : public classbase
  91 {
  92  public:
  93         irc::string Name;
  94         std::string IPAddr;
  95         int Port;
  96         std::string SendPass;
  97         std::string RecvPass;
  98         unsigned long AutoConnect;
  99         time_t NextConnectTime;
 100         std::string EncryptionKey;
 101         bool HiddenFromStats;
 102         std::string FailOver;
 103 };
 104
 105 /** Contains helper functions and variables for this module,
 106  * and keeps them out of the global namespace
 107  */
 108 class SpanningTreeUtilities
 109 {
 110  private:
 111         /** Creator server
 112          */
 113         InspIRCd* ServerInstance;
 114  public:
 115         /** Creator module
 116          */
 117         ModuleSpanningTree* Creator;
 118         /** Flatten links and /MAP for non-opers
 119          */
 120         bool FlatLinks;
 121         /** Hide U-Lined servers in /MAP and /LINKS
 122          */
 123         bool HideULines;
 124         /** Announce TS changes to channels on merge
 125          */
 126         bool AnnounceTSChange;
 127         /** Socket bindings for listening sockets
 128          */
 129         std::vector<TreeSocket*> Bindings;
 130         /** This variable represents the root of the server tree
 131          */
 132         TreeServer *TreeRoot;
 133         /** IPs allowed to link to us
 134          */
 135         std::vector<std::string> ValidIPs;
 136         /** Hash of currently connected servers by name
 137          */
 138         server_hash serverlist;
 139         /** Holds the data from the <link> tags in the conf
 140          */
 141         std::vector<Link> LinkBlocks;
 142
 143         /** Initialise utility class
 144          */
 145         SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* Creator);
 146         /** Destroy class and free listeners etc
 147          */
 148         ~SpanningTreeUtilities();
 149         /** Send a message from this server to one other local or remote
 150          */
 151         bool DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target);
 152         /** Send a message from this server to all but one other, local or remote
 153          */
 154         bool DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit);
 155         /** Send a message from this server to all but one other, local or remote
 156          */
 157         bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 158         /** Send a message from this server to all others
 159          */
 160         bool DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params);
 161         /** Send a message from this server to all others
 162          */
 163         bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 164         /** Send a message from this server to all others, without doing any processing on the command (e.g. send it as-is with colons and all)
 165          */
 166         bool DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params);
 167         /** Read the spanningtree module's tags from the config file
 168          */
 169         void ReadConfiguration(bool rebind);
 170         /** Add a server to the server list for GetListOfServersForChannel
 171          */
 172         void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list);
 173         /** Compile a list of servers which contain members of channel c
 174          */
 175         void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list);
 176         /** Find a server by name
 177          */
 178         TreeServer* FindServer(const std::string &ServerName);
 179         /** Find a route to a server by name
 180          */
 181         TreeServer* BestRouteTo(const std::string &ServerName);
 182         /** Find a server by glob mask
 183          */
 184         TreeServer* FindServerMask(const std::string &ServerName);
 185         /** Returns true if this is a server name we recognise
 186          */
 187         bool IsServer(const std::string &ServerName);
 188         /** Attempt to connect to the failover link of link x
 189          */
 190         void DoFailOver(Link* x);
 191         /** Find a link tag from a server name
 192          */
 193         Link* FindLink(const std::string& name);
 194 };
 195
 196
 197 /** Each server in the tree is represented by one class of
 198  * type TreeServer. A locally connected TreeServer can
 199  * have a class of type TreeSocket associated with it, for
 200  * remote servers, the TreeSocket entry will be NULL.
 201  * Each server also maintains a pointer to its parent
 202  * (NULL if this server is ours, at the top of the tree)
 203  * and a pointer to its "Route" (see the comments in the
 204  * constructors below), and also a dynamic list of pointers
 205  * to its children which can be iterated recursively
 206  * if required. Creating or deleting objects of type
 207  i* TreeServer automatically maintains the hash_map of
 208  * TreeServer items, deleting and inserting them as they
 209  * are created and destroyed.
 210  */
 211 class TreeServer : public classbase
 212 {
 213         InspIRCd* ServerInstance;               /* Creator */
 214         TreeServer* Parent;                     /* Parent entry */
 215         TreeServer* Route;                      /* Route entry */
 216         std::vector<TreeServer*> Children;      /* List of child objects */
 217         irc::string ServerName;                 /* Server's name */
 218         std::string ServerDesc;                 /* Server's description */
 219         std::string VersionString;              /* Version string or empty string */
 220         int UserCount;                          /* Not used in this version */
 221         int OperCount;                          /* Not used in this version */
 222         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 223         time_t NextPing;                        /* After this time, the server should be PINGed*/
 224         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 225         SpanningTreeUtilities* Utils;           /* Utility class */
 226
 227  public:
 228
 229         /** We don't use this constructor. Its a dummy, and won't cause any insertion
 230          * of the TreeServer into the hash_map. See below for the two we DO use.
 231          */
 232         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance) : ServerInstance(Instance), Utils(Util)
 233         {
 234                 Parent = NULL;
 235                 ServerName = "";
 236                 ServerDesc = "";
 237                 VersionString = "";
 238                 UserCount = OperCount = 0;
 239                 VersionString = ServerInstance->GetVersionString();
 240         }
 241
 242         /** We use this constructor only to create the 'root' item, Utils->TreeRoot, which
 243          * represents our own server. Therefore, it has no route, no parent, and
 244          * no socket associated with it. Its version string is our own local version.
 245          */
 246         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc), Utils(Util)
 247         {
 248                 Parent = NULL;
 249                 VersionString = "";
 250                 UserCount = ServerInstance->UserCount();
 251                 OperCount = ServerInstance->OperCount();
 252                 VersionString = ServerInstance->GetVersionString();
 253                 Route = NULL;
 254                 Socket = NULL; /* Fix by brain */
 255                 AddHashEntry();
 256         }
 257
 258         /** When we create a new server, we call this constructor to initialize it.
 259          * This constructor initializes the server's Route and Parent, and sets up
 260          * its ping counters so that it will be pinged one minute from now.
 261          */
 262         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 263                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock), Utils(Util)
 264         {
 265                 VersionString = "";
 266                 UserCount = OperCount = 0;
 267                 this->SetNextPingTime(time(NULL) + 60);
 268                 this->SetPingFlag();
 269
 270                 /* find the 'route' for this server (e.g. the one directly connected
 271                  * to the local server, which we can use to reach it)
 272                  *
 273                  * In the following example, consider we have just added a TreeServer
 274                  * class for server G on our network, of which we are server A.
 275                  * To route traffic to G (marked with a *) we must send the data to
 276                  * B (marked with a +) so this algorithm initializes the 'Route'
 277                  * value to point at whichever server traffic must be routed through
 278                  * to get here. If we were to try this algorithm with server B,
 279                  * the Route pointer would point at its own object ('this').
 280                  *
 281                  *              A
 282                  *             / \
 283                  *          + B   C
 284                  *           / \   \
 285                  *          D   E   F
 286                  *         /         \
 287                  *      * G           H
 288                  *
 289                  * We only run this algorithm when a server is created, as
 290                  * the routes remain constant while ever the server exists, and
 291                  * do not need to be re-calculated.
 292                  */
 293
 294                 Route = Above;
 295                 if (Route == Utils->TreeRoot)
 296                 {
 297                         Route = this;
 298                 }
 299                 else
 300                 {
 301                         while (this->Route->GetParent() != Utils->TreeRoot)
 302                         {
 303                                 this->Route = Route->GetParent();
 304                         }
 305                 }
 306
 307                 /* Because recursive code is slow and takes a lot of resources,
 308                  * we store two representations of the server tree. The first
 309                  * is a recursive structure where each server references its
 310                  * children and its parent, which is used for netbursts and
 311                  * netsplits to dump the whole dataset to the other server,
 312                  * and the second is used for very fast lookups when routing
 313                  * messages and is instead a hash_map, where each item can
 314                  * be referenced by its server name. The AddHashEntry()
 315                  * call below automatically inserts each TreeServer class
 316                  * into the hash_map as it is created. There is a similar
 317                  * maintainance call in the destructor to tidy up deleted
 318                  * servers.
 319                  */
 320
 321                 this->AddHashEntry();
 322         }
 323
 324         int QuitUsers(const std::string &reason)
 325         {
 326                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 327                 const char* reason_s = reason.c_str();
 328                 std::vector<userrec*> time_to_die;
 329                 for (user_hash::iterator n = ServerInstance->clientlist.begin(); n != ServerInstance->clientlist.end(); n++)
 330                 {
 331                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 332                         {
 333                                 time_to_die.push_back(n->second);
 334                         }
 335                 }
 336                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 337                 {
 338                         userrec* a = (userrec*)*n;
 339                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 340                         if (!IS_LOCAL(a))
 341                                 userrec::QuitUser(ServerInstance,a,reason_s);
 342                 }
 343                 return time_to_die.size();
 344         }
 345
 346         /** This method is used to add the structure to the
 347          * hash_map for linear searches. It is only called
 348          * by the constructors.
 349          */
 350         void AddHashEntry()
 351         {
 352                 server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str());
 353                 if (iter == Utils->serverlist.end())
 354                         Utils->serverlist[this->ServerName.c_str()] = this;
 355         }
 356
 357         /** This method removes the reference to this object
 358          * from the hash_map which is used for linear searches.
 359          * It is only called by the default destructor.
 360          */
 361         void DelHashEntry()
 362         {
 363                 server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str());
 364                 if (iter != Utils->serverlist.end())
 365                         Utils->serverlist.erase(iter);
 366         }
 367
 368         /** These accessors etc should be pretty self-
 369          * explanitory.
 370          */
 371         TreeServer* GetRoute()
 372         {
 373                 return Route;
 374         }
 375
 376         std::string GetName()
 377         {
 378                 return ServerName.c_str();
 379         }
 380
 381         std::string GetDesc()
 382         {
 383                 return ServerDesc;
 384         }
 385
 386         std::string GetVersion()
 387         {
 388                 return VersionString;
 389         }
 390
 391         void SetNextPingTime(time_t t)
 392         {
 393                 this->NextPing = t;
 394                 LastPingWasGood = false;
 395         }
 396
 397         time_t NextPingTime()
 398         {
 399                 return NextPing;
 400         }
 401
 402         bool AnsweredLastPing()
 403         {
 404                 return LastPingWasGood;
 405         }
 406
 407         void SetPingFlag()
 408         {
 409                 LastPingWasGood = true;
 410         }
 411
 412         int GetUserCount()
 413         {
 414                 return UserCount;
 415         }
 416
 417         void AddUserCount()
 418         {
 419                 UserCount++;
 420         }
 421
 422         void DelUserCount()
 423         {
 424                 UserCount--;
 425         }
 426
 427         int GetOperCount()
 428         {
 429                 return OperCount;
 430         }
 431
 432         TreeSocket* GetSocket()
 433         {
 434                 return Socket;
 435         }
 436
 437         TreeServer* GetParent()
 438         {
 439                 return Parent;
 440         }
 441
 442         void SetVersion(const std::string &Version)
 443         {
 444                 VersionString = Version;
 445         }
 446
 447         unsigned int ChildCount()
 448         {
 449                 return Children.size();
 450         }
 451
 452         TreeServer* GetChild(unsigned int n)
 453         {
 454                 if (n < Children.size())
 455                 {
 456                         /* Make sure they  cant request
 457                          * an out-of-range object. After
 458                          * all we know what these programmer
 459                          * types are like *grin*.
 460                          */
 461                         return Children[n];
 462                 }
 463                 else
 464                 {
 465                         return NULL;
 466                 }
 467         }
 468
 469         void AddChild(TreeServer* Child)
 470         {
 471                 Children.push_back(Child);
 472         }
 473
 474         bool DelChild(TreeServer* Child)
 475         {
 476                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 477                 {
 478                         if (*a == Child)
 479                         {
 480                                 Children.erase(a);
 481                                 return true;
 482                         }
 483                 }
 484                 return false;
 485         }
 486
 487         /** Removes child nodes of this node, and of that node, etc etc.
 488          * This is used during netsplits to automatically tidy up the
 489          * server tree. It is slow, we don't use it for much else.
 490          */
 491         bool Tidy()
 492         {
 493                 bool stillchildren = true;
 494                 while (stillchildren)
 495                 {
 496                         stillchildren = false;
 497                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 498                         {
 499                                 TreeServer* s = (TreeServer*)*a;
 500                                 s->Tidy();
 501                                 Children.erase(a);
 502                                 DELETE(s);
 503                                 stillchildren = true;
 504                                 break;
 505                         }
 506                 }
 507                 return true;
 508         }
 509
 510         ~TreeServer()
 511         {
 512                 /* We'd better tidy up after ourselves, eh? */
 513                 this->DelHashEntry();
 514         }
 515 };
 516
 517 /** Yay for fast searches!
 518  * This is hundreds of times faster than recursion
 519  * or even scanning a linked list, especially when
 520  * there are more than a few servers to deal with.
 521  * (read as: lots).
 522  */
 523 TreeServer* SpanningTreeUtilities::FindServer(const std::string &ServerName)
 524 {
 525         server_hash::iterator iter;
 526         iter = serverlist.find(ServerName.c_str());
 527         if (iter != serverlist.end())
 528         {
 529                 return iter->second;
 530         }
 531         else
 532         {
 533                 return NULL;
 534         }
 535 }
 536
 537 /** Returns the locally connected server we must route a
 538  * message through to reach server 'ServerName'. This
 539  * only applies to one-to-one and not one-to-many routing.
 540  * See the comments for the constructor of TreeServer
 541  * for more details.
 542  */
 543 TreeServer* SpanningTreeUtilities::BestRouteTo(const std::string &ServerName)
 544 {
 545         if (ServerName.c_str() == TreeRoot->GetName())
 546                 return NULL;
 547         TreeServer* Found = FindServer(ServerName);
 548         if (Found)
 549         {
 550                 return Found->GetRoute();
 551         }
 552         else
 553         {
 554                 return NULL;
 555         }
 556 }
 557
 558 /** Find the first server matching a given glob mask.
 559  * Theres no find-using-glob method of hash_map [awwww :-(]
 560  * so instead, we iterate over the list using an iterator
 561  * and match each one until we get a hit. Yes its slow,
 562  * deal with it.
 563  */
 564 TreeServer* SpanningTreeUtilities::FindServerMask(const std::string &ServerName)
 565 {
 566         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 567         {
 568                 if (match(i->first.c_str(),ServerName.c_str()))
 569                         return i->second;
 570         }
 571         return NULL;
 572 }
 573
 574 /* A convenient wrapper that returns true if a server exists */
 575 bool SpanningTreeUtilities::IsServer(const std::string &ServerName)
 576 {
 577         return (FindServer(ServerName) != NULL);
 578 }
 579
 580
 581 /** Handle /RCONNECT
 582  */
 583 class cmd_rconnect : public command_t
 584 {
 585         Module* Creator;
 586         SpanningTreeUtilities* Utils;
 587  public:
 588         cmd_rconnect (InspIRCd* Instance, Module* Callback, SpanningTreeUtilities* Util) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback), Utils(Util)
 589         {
 590                 this->source = "m_spanningtree.so";
 591                 syntax = "<remote-server-mask> <servermask>";
 592         }
 593
 594         CmdResult Handle (const char** parameters, int pcnt, userrec *user)
 595         {
 596                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 597                 /* Is this aimed at our server? */
 598                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 599                 {
 600                         /* Yes, initiate the given connect */
 601                         ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 602                         const char* para[1];
 603                         para[0] = parameters[1];
 604                         std::string original_command = std::string("CONNECT ") + parameters[1];
 605                         Creator->OnPreCommand("CONNECT", para, 1, user, true, original_command);
 606
 607                         return CMD_SUCCESS;
 608                 }
 609
 610                 return CMD_FAILURE;
 611         }
 612 };
 613
 614
 615
 616 /** Every SERVER connection inbound or outbound is represented by
 617  * an object of type TreeSocket.
 618  * TreeSockets, being inherited from InspSocket, can be tied into
 619  * the core socket engine, and we cn therefore receive activity events
 620  * for them, just like activex objects on speed. (yes really, that
 621  * is a technical term!) Each of these which relates to a locally
 622  * connected server is assocated with it, by hooking it onto a
 623  * TreeSocket class using its constructor. In this way, we can
 624  * maintain a list of servers, some of which are directly connected,
 625  * some of which are not.
 626  */
 627 class TreeSocket : public InspSocket
 628 {
 629         SpanningTreeUtilities* Utils;
 630         std::string myhost;
 631         std::string in_buffer;
 632         ServerState LinkState;
 633         std::string InboundServerName;
 634         std::string InboundDescription;
 635         int num_lost_users;
 636         int num_lost_servers;
 637         time_t NextPing;
 638         bool LastPingWasGood;
 639         bool bursting;
 640         AES* ctx_in;
 641         AES* ctx_out;
 642         unsigned int keylength;
 643         std::string ModuleList;
 644         std::map<std::string,std::string> CapKeys;
 645
 646  public:
 647
 648         /** Because most of the I/O gubbins are encapsulated within
 649          * InspSocket, we just call the superclass constructor for
 650          * most of the action, and append a few of our own values
 651          * to it.
 652          */
 653         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime)
 654                 : InspSocket(SI, host, port, listening, maxtime), Utils(Util)
 655         {
 656                 myhost = host;
 657                 this->LinkState = LISTENER;
 658                 this->ctx_in = NULL;
 659                 this->ctx_out = NULL;
 660         }
 661
 662         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 663                 : InspSocket(SI, host, port, listening, maxtime), Utils(Util)
 664         {
 665                 myhost = ServerName;
 666                 this->LinkState = CONNECTING;
 667                 this->ctx_in = NULL;
 668                 this->ctx_out = NULL;
 669         }
 670
 671         /** When a listening socket gives us a new file descriptor,
 672          * we must associate it with a socket without creating a new
 673          * connection. This constructor is used for this purpose.
 674          */
 675         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip)
 676                 : InspSocket(SI, newfd, ip), Utils(Util)
 677         {
 678                 this->LinkState = WAIT_AUTH_1;
 679                 this->ctx_in = NULL;
 680                 this->ctx_out = NULL;
 681                 this->SendCapabilities();
 682         }
 683
 684         ~TreeSocket()
 685         {
 686                 if (ctx_in)
 687                         DELETE(ctx_in);
 688                 if (ctx_out)
 689                         DELETE(ctx_out);
 690         }
 691
 692         void InitAES(std::string key,std::string SName)
 693         {
 694                 if (key == "")
 695                         return;
 696
 697                 ctx_in = new AES();
 698                 ctx_out = new AES();
 699                 Instance->Log(DEBUG,"Initialized AES key %s",key.c_str());
 700                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 701                 keylength = key.length();
 702                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 703                 {
 704                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 705                         Instance->Log(DEBUG,"Key length not 16, 24 or 32 characters!");
 706                 }
 707                 else
 708                 {
 709                         if (this->GetState() != I_ERROR)
 710                         {
 711                                 this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 712                                 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\
 713                                         \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);
 714                                 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\
 715                                         \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);
 716                         }
 717                 }
 718         }
 719
 720         /** When an outbound connection finishes connecting, we receive
 721          * this event, and must send our SERVER string to the other
 722          * side. If the other side is happy, as outlined in the server
 723          * to server docs on the inspircd.org site, the other side
 724          * will then send back its own server string.
 725          */
 726         virtual bool OnConnected()
 727         {
 728                 if (this->LinkState == CONNECTING)
 729                 {
 730                         /* we do not need to change state here. */
 731                         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 732                         {
 733                                 if (x->Name == this->myhost)
 734                                 {
 735                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
 736                                         this->SendCapabilities();
 737                                         if (x->EncryptionKey != "")
 738                                         {
 739                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 740                                                 {
 741                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 742                                                 }
 743                                                 else
 744                                                 {
 745                                                         this->WriteLine(std::string("AES ")+this->Instance->Config->ServerName);
 746                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 747                                                 }
 748                                         }
 749                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 750                                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 751                                         return true;
 752                                 }
 753                         }
 754                 }
 755                 /* There is a (remote) chance that between the /CONNECT and the connection
 756                  * being accepted, some muppet has removed the <link> block and rehashed.
 757                  * If that happens the connection hangs here until it's closed. Unlikely
 758                  * and rather harmless.
 759                  */
 760                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 761                 return true;
 762         }
 763
 764         virtual void OnError(InspSocketError e)
 765         {
 766                 /* We don't handle this method, because all our
 767                  * dirty work is done in OnClose() (see below)
 768                  * which is still called on error conditions too.
 769                  */
 770                 if (e == I_ERR_CONNECT)
 771                 {
 772                         this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
 773                         Link* MyLink = Utils->FindLink(myhost);
 774                         if (MyLink)
 775                                 Utils->DoFailOver(MyLink);
 776                 }
 777         }
 778
 779         virtual int OnDisconnect()
 780         {
 781                 /* For the same reason as above, we don't
 782                  * handle OnDisconnect()
 783                  */
 784                 return true;
 785         }
 786
 787         /** Recursively send the server tree with distances as hops.
 788          * This is used during network burst to inform the other server
 789          * (and any of ITS servers too) of what servers we know about.
 790          * If at any point any of these servers already exist on the other
 791          * end, our connection may be terminated. The hopcounts given
 792          * by this function are relative, this doesn't matter so long as
 793          * they are all >1, as all the remote servers re-calculate them
 794          * to be relative too, with themselves as hop 0.
 795          */
 796         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 797         {
 798                 char command[1024];
 799                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 800                 {
 801                         TreeServer* recursive_server = Current->GetChild(q);
 802                         if (recursive_server != s)
 803                         {
 804                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 805                                 this->WriteLine(command);
 806                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 807                                 /* down to next level */
 808                                 this->SendServers(recursive_server, s, hops+1);
 809                         }
 810                 }
 811         }
 812
 813         std::string MyCapabilities()
 814         {
 815                 std::vector<std::string> modlist;
 816                 std::string capabilities = "";
 817
 818                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 819                 {
 820                         if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
 821                                 modlist.push_back(this->Instance->Config->module_names[i]);
 822                 }
 823                 sort(modlist.begin(),modlist.end());
 824                 for (unsigned int i = 0; i < modlist.size(); i++)
 825                 {
 826                         if (i)
 827                                 capabilities = capabilities + ",";
 828                         capabilities = capabilities + modlist[i];
 829                 }
 830                 return capabilities;
 831         }
 832
 833         void SendCapabilities()
 834         {
 835                 irc::commasepstream modulelist(MyCapabilities());
 836
 837                 this->WriteLine("CAPAB START");
 838
 839                 /* Send module names, split at 509 length */
 840                 std::string item = "*";
 841                 std::string line = "CAPAB MODULES ";
 842                 while ((item = modulelist.GetToken()) != "")
 843                 {
 844                         if (line.length() + item.length() + 1 > 509)
 845                         {
 846                                 this->WriteLine(line);
 847                                 line = "CAPAB MODULES ";
 848                         }
 849
 850                         if (line != "CAPAB MODULES ")
 851                                 line.append(",");
 852
 853                         line.append(item);
 854                 }
 855                 if (line != "CAPAB MODULES ")
 856                         this->WriteLine(line);
 857
 858                 int ip6 = 0;
 859                 int ip6support = 0;
 860 #ifdef IPV6
 861                 ip6 = 1;
 862 #endif
 863 #ifdef SUPPORT_IP6LINKS
 864                 ip6support = 1;
 865 #endif
 866                 this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support)+" PROTOCOL="+ConvToStr(ProtocolVersion));
 867
 868                 this->WriteLine("CAPAB END");
 869         }
 870
 871         /* Check a comma seperated list for an item */
 872         bool HasItem(const std::string &list, const std::string &item)
 873         {
 874                 irc::commasepstream seplist(list);
 875
 876                 std::string item2 = "*";
 877                 while ((item2 = seplist.GetToken()) != "")
 878                 {
 879                         if (item2 == item)
 880                                 return true;
 881                 }
 882
 883                 return false;
 884         }
 885
 886         /* Isolate and return the elements that are different between two comma seperated lists */
 887         std::string ListDifference(const std::string &one, const std::string &two)
 888         {
 889                 irc::commasepstream list_one(one);
 890                 std::string item = "*";
 891                 std::string result = "";
 892                 while ((item = list_one.GetToken()) != "")
 893                 {
 894                         if (!HasItem(two, item))
 895                         {
 896                                 result.append(" ");
 897                                 result.append(item);
 898                         }
 899                 }
 900                 return result;
 901         }
 902
 903         bool Capab(const std::deque<std::string> &params)
 904         {
 905                 if (params.size() < 1)
 906                 {
 907                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 908                         return false;
 909                 }
 910
 911                 if (params[0] == "START")
 912                 {
 913                         this->ModuleList = "";
 914                         this->CapKeys.clear();
 915                 }
 916                 else if (params[0] == "END")
 917                 {
 918                         std::string reason = "";
 919                         int ip6support = 0;
 920 #ifdef SUPPORT_IP6LINKS
 921                         ip6support = 1;
 922 #endif
 923                         /* Compare ModuleList and check CapKeys...
 924                          * Maybe this could be tidier? -- Brain
 925                          */
 926                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 927                         {
 928                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 929                                 if (!diff.length())
 930                                 {
 931                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 932                                 }
 933                                 else
 934                                 {
 935                                         diff = "this server:" + diff;
 936                                 }
 937                                 if (diff.length() == 12)
 938                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 939                                 else
 940                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 941                         }
 942
 943                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 944                                 reason = "We don't both support linking to IPV6 servers";
 945
 946                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 947                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 948
 949                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 950                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 951
 952                         if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
 953                         {
 954                                 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
 955                                 {
 956                                         reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
 957                                 }
 958                                 else
 959                                 {
 960                                         reason = "Protocol version not specified";
 961                                 }
 962                         }
 963
 964                         if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
 965                                 reason = "We don't both have halfop support enabled/disabled identically";
 966
 967                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 968                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 969
 970                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 971                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 972
 973                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 974                                 reason = "Maximum modes per line differ or remote modes per line not specified";
 975
 976                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 977                                 reason = "Maximum quit lengths differ or remote quit length not specified";
 978
 979                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 980                                 reason = "Maximum topic lengths differ or remote topic length not specified";
 981
 982                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
 983                                 reason = "Maximum kick lengths differ or remote kick length not specified";
 984
 985                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
 986                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
 987
 988                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
 989                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
 990
 991                         if (reason.length())
 992                         {
 993                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
 994                                 return false;
 995                         }
 996                 }
 997                 else if ((params[0] == "MODULES") && (params.size() == 2))
 998                 {
 999                         if (!this->ModuleList.length())
1000                         {
1001                                 this->ModuleList.append(params[1]);
1002                         }
1003                         else
1004                         {
1005                                 this->ModuleList.append(",");
1006                                 this->ModuleList.append(params[1]);
1007                         }
1008                 }
1009                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
1010                 {
1011                         irc::tokenstream capabs(params[1]);
1012                         std::string item = "*";
1013                         while ((item = capabs.GetToken()) != "")
1014                         {
1015                                 /* Process each key/value pair */
1016                                 std::string::size_type equals = item.rfind('=');
1017                                 if (equals != std::string::npos)
1018                                 {
1019                                         std::string var = item.substr(0, equals);
1020                                         std::string value = item.substr(equals+1, item.length());
1021                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1022                                         CapKeys[var] = value;
1023                                 }
1024                         }
1025                 }
1026
1027                 return true;
1028         }
1029
1030         /** This function forces this server to quit, removing this server
1031          * and any users on it (and servers and users below that, etc etc).
1032          * It's very slow and pretty clunky, but luckily unless your network
1033          * is having a REAL bad hair day, this function shouldnt be called
1034          * too many times a month ;-)
1035          */
1036         void SquitServer(std::string &from, TreeServer* Current)
1037         {
1038                 /* recursively squit the servers attached to 'Current'.
1039                  * We're going backwards so we don't remove users
1040                  * while we still need them ;)
1041                  */
1042                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1043                 {
1044                         TreeServer* recursive_server = Current->GetChild(q);
1045                         this->SquitServer(from,recursive_server);
1046                 }
1047                 /* Now we've whacked the kids, whack self */
1048                 num_lost_servers++;
1049                 num_lost_users += Current->QuitUsers(from);
1050         }
1051
1052         /** This is a wrapper function for SquitServer above, which
1053          * does some validation first and passes on the SQUIT to all
1054          * other remaining servers.
1055          */
1056         void Squit(TreeServer* Current, const std::string &reason)
1057         {
1058                 if ((Current) && (Current != Utils->TreeRoot))
1059                 {
1060                         std::deque<std::string> params;
1061                         params.push_back(Current->GetName());
1062                         params.push_back(":"+reason);
1063                         Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1064                         if (Current->GetParent() == Utils->TreeRoot)
1065                         {
1066                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1067                         }
1068                         else
1069                         {
1070                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1071                         }
1072                         num_lost_servers = 0;
1073                         num_lost_users = 0;
1074                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1075                         SquitServer(from, Current);
1076                         Current->Tidy();
1077                         Current->GetParent()->DelChild(Current);
1078                         DELETE(Current);
1079                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1080                 }
1081                 else
1082                 {
1083                         Instance->Log(DEFAULT,"Squit from unknown server");
1084                 }
1085         }
1086
1087         /** FMODE command - server mode with timestamp checks */
1088         bool ForceMode(const std::string &source, std::deque<std::string> &params)
1089         {
1090                 /* Chances are this is a 1.0 FMODE without TS */
1091                 if (params.size() < 3)
1092                 {
1093                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
1094                         return false;
1095                 }
1096
1097                 bool smode = false;
1098                 std::string sourceserv;
1099
1100                 /* Are we dealing with an FMODE from a user, or from a server? */
1101                 userrec* who = this->Instance->FindNick(source);
1102                 if (who)
1103                 {
1104                         /* FMODE from a user, set sourceserv to the users server name */
1105                         sourceserv = who->server;
1106                 }
1107                 else
1108                 {
1109                         /* FMODE from a server, create a fake user to receive mode feedback */
1110                         who = new userrec(this->Instance);
1111                         who->SetFd(FD_MAGIC_NUMBER);
1112                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1113                         sourceserv = source;    /* Set sourceserv to the actual source string */
1114                 }
1115                 const char* modelist[64];
1116                 time_t TS = 0;
1117                 int n = 0;
1118                 memset(&modelist,0,sizeof(modelist));
1119                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1120                 {
1121                         if (q == 1)
1122                         {
1123                                 /* The timestamp is in this position.
1124                                  * We don't want to pass that up to the
1125                                  * server->client protocol!
1126                                  */
1127                                 TS = atoi(params[q].c_str());
1128                         }
1129                         else
1130                         {
1131                                 /* Everything else is fine to append to the modelist */
1132                                 modelist[n++] = params[q].c_str();
1133                         }
1134
1135                 }
1136                 /* Extract the TS value of the object, either userrec or chanrec */
1137                 userrec* dst = this->Instance->FindNick(params[0]);
1138                 chanrec* chan = NULL;
1139                 time_t ourTS = 0;
1140                 if (dst)
1141                 {
1142                         ourTS = dst->age;
1143                 }
1144                 else
1145                 {
1146                         chan = this->Instance->FindChan(params[0]);
1147                         if (chan)
1148                         {
1149                                 ourTS = chan->age;
1150                         }
1151                         else
1152                                 /* Oops, channel doesnt exist! */
1153                                 return true;
1154                 }
1155
1156                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1157                  * with parameters.
1158                  */
1159                 if (TS == ourTS)
1160                 {
1161                         Instance->Log(DEBUG,"Entering TS equality check");
1162                         ModeHandler* mh = NULL;
1163                         unsigned long paramptr = 3;
1164                         std::string to_bounce = "";
1165                         std::string to_keep = "";
1166                         std::vector<std::string> params_to_keep;
1167                         std::string params_to_bounce = "";
1168                         bool adding = true;
1169                         char cur_change = 1;
1170                         char old_change = 0;
1171                         char old_bounce_change = 0;
1172                         /* Merge modes, basically do special stuff to mode with params */
1173                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1174                         {
1175                                 switch (*x)
1176                                 {
1177                                         case '-':
1178                                                 adding = false;
1179                                         break;
1180                                         case '+':
1181                                                 adding = true;
1182                                         break;
1183                                         default:
1184                                                 if (adding)
1185                                                 {
1186                                                         /* We only care about whats being set,
1187                                                          * not whats being unset
1188                                                          */
1189                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1190
1191                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1192                                                         {
1193                                                                 /* We only want to do special things to
1194                                                                  * modes with parameters, we are going to rewrite
1195                                                                  * those parameters
1196                                                                  */
1197                                                                 ModePair ret;
1198                                                                 adding ? cur_change = '+' : cur_change = '-';
1199
1200                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1201
1202                                                                 /* The mode is set here, check which we should keep */
1203                                                                 if (ret.first)
1204                                                                 {
1205                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1206
1207                                                                         if (which_to_keep == true)
1208                                                                         {
1209                                                                                 /* Keep ours, bounce theirs:
1210                                                                                  * Send back ours to them and
1211                                                                                  * drop their mode changs
1212                                                                                  */
1213                                                                                 adding ? cur_change = '+' : cur_change = '-';
1214                                                                                 if (cur_change != old_bounce_change)
1215                                                                                         to_bounce += cur_change;
1216                                                                                 to_bounce += *x;
1217                                                                                 old_bounce_change = cur_change;
1218
1219                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1220                                                                                         params_to_bounce.append(" ").append(ret.second);
1221                                                                         }
1222                                                                         else
1223                                                                         {
1224                                                                                 /* Keep theirs: Accept their mode change,
1225                                                                                  * do nothing else
1226                                                                                  */
1227                                                                                 adding ? cur_change = '+' : cur_change = '-';
1228                                                                                 if (cur_change != old_change)
1229                                                                                         to_keep += cur_change;
1230                                                                                 to_keep += *x;
1231                                                                                 old_change = cur_change;
1232
1233                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1234                                                                                         params_to_keep.push_back(params[paramptr]);
1235                                                                         }
1236                                                                 }
1237                                                                 else
1238                                                                 {
1239                                                                         /* Mode isnt set here, we want it */
1240                                                                         adding ? cur_change = '+' : cur_change = '-';
1241                                                                         if (cur_change != old_change)
1242                                                                                 to_keep += cur_change;
1243                                                                         to_keep += *x;
1244                                                                         old_change = cur_change;
1245
1246                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1247                                                                                 params_to_keep.push_back(params[paramptr]);
1248                                                                 }
1249
1250                                                                 paramptr++;
1251                                                         }
1252                                                         else
1253                                                         {
1254                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1255
1256                                                                 if (mh)
1257                                                                 {
1258                                                                         adding ? cur_change = '+' : cur_change = '-';
1259
1260                                                                         /* Just keep this, safe to merge with no checks
1261                                                                          * it has no parameters
1262                                                                          */
1263
1264                                                                         if (cur_change != old_change)
1265                                                                                 to_keep += cur_change;
1266                                                                         to_keep += *x;
1267                                                                         old_change = cur_change;
1268
1269                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1270                                                                         {
1271                                                                                 Instance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1272                                                                                 params_to_keep.push_back(params[paramptr++]);
1273                                                                         }
1274                                                                 }
1275                                                         }
1276                                                 }
1277                                                 else
1278                                                 {
1279                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1280
1281                                                         if (mh)
1282                                                         {
1283                                                                 /* Taking a mode away */
1284                                                                 adding ? cur_change = '+' : cur_change = '-';
1285
1286                                                                 if (cur_change != old_change)
1287                                                                         to_keep += cur_change;
1288                                                                 to_keep += *x;
1289                                                                 old_change = cur_change;
1290
1291                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1292                                                                         params_to_keep.push_back(params[paramptr++]);
1293                                                         }
1294                                                 }
1295                                         break;
1296                                 }
1297                         }
1298
1299                         if (to_bounce.length())
1300                         {
1301                                 std::deque<std::string> newparams;
1302                                 newparams.push_back(params[0]);
1303                                 newparams.push_back(ConvToStr(ourTS));
1304                                 newparams.push_back(to_bounce+params_to_bounce);
1305                                 Instance->Log(DEBUG,"BOUNCE BACK: %s",(to_bounce+params_to_bounce).c_str());
1306                                 Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1307                         }
1308
1309                         if (to_keep.length())
1310                         {
1311                                 unsigned int n = 2;
1312                                 unsigned int q = 0;
1313                                 modelist[0] = params[0].c_str();
1314                                 modelist[1] = to_keep.c_str();
1315
1316                                 if (params_to_keep.size() > 0)
1317                                 {
1318                                         for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
1319                                         {
1320                                                 Instance->Log(DEBUG,"KEEP Item %d of %d: %s", q, params_to_keep.size(), params_to_keep[q].c_str());
1321                                                 modelist[n++] = params_to_keep[q].c_str();
1322                                         }
1323                                 }
1324
1325                                 if (smode)
1326                                 {
1327                                         Instance->Log(DEBUG,"Send mode");
1328                                         this->Instance->SendMode(modelist, n, who);
1329                                 }
1330                                 else
1331                                 {
1332                                         Instance->Log(DEBUG,"Send mode client");
1333                                         this->Instance->CallCommandHandler("MODE", modelist, n, who);
1334                                 }
1335
1336                                 /* HOT POTATO! PASS IT ON! */
1337                                 Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1338                         }
1339                 }
1340                 else
1341                 /* U-lined servers always win regardless of their TS */
1342                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1343                 {
1344                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1345                          * SHOULD accept it, if its clock is right.
1346                          *
1347                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1348                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1349                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1350                          *
1351                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1352                          * writing the code. It took me a while to come up with this solution.
1353                          *
1354                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1355                          */
1356
1357                         std::deque<std::string> newparams;      /* New parameter list we send back */
1358                         newparams.push_back(params[0]);         /* Target, user or channel */
1359                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1360                         newparams.push_back("");                /* This contains the mode string. For now
1361                                                                  * it's empty, we fill it below.
1362                                                                  */
1363
1364                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1365                          * set to avoid a desync here.
1366                          */
1367                         std::string modebounce = "";
1368                         bool adding = true;
1369                         unsigned int t = 3;
1370                         ModeHandler* mh = NULL;
1371                         char cur_change = 1;
1372                         char old_change = 0;
1373                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1374                         {
1375                                 /* Iterate over all mode chars in the sent set */
1376                                 switch (*x)
1377                                 {
1378                                         /* Adding or subtracting modes? */
1379                                         case '-':
1380                                                 adding = false;
1381                                         break;
1382                                         case '+':
1383                                                 adding = true;
1384                                         break;
1385                                         default:
1386                                                 /* Find the mode handler for this mode */
1387                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1388
1389                                                 /* Got a mode handler?
1390                                                  * This also prevents us bouncing modes we have no handler for.
1391                                                  */
1392                                                 if (mh)
1393                                                 {
1394                                                         ModePair ret;
1395                                                         std::string p = "";
1396
1397                                                         /* Does the mode require a parameter right now?
1398                                                          * If it does, fetch it if we can
1399                                                          */
1400                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1401                                                                 p = params[t++];
1402
1403                                                         /* Call the ModeSet method to determine if its set with the
1404                                                          * given parameter here or not.
1405                                                          */
1406                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1407
1408                                                         /* XXX: Really. Dont ask.
1409                                                          * Determine from if its set combined with what the current
1410                                                          * 'state' is (adding or not) as to wether we should 'invert'
1411                                                          * or 'reinforce' the mode change
1412                                                          */
1413                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1414
1415                                                         /* Quickly determine if we have 'flipped' from + to -,
1416                                                          * or - to +, to prevent unneccessary +/- chars in the
1417                                                          * output string that waste bandwidth
1418                                                          */
1419                                                         if (cur_change != old_change)
1420                                                                 modebounce += cur_change;
1421                                                         old_change = cur_change;
1422
1423                                                         /* Add the mode character to the output string */
1424                                                         modebounce += mh->GetModeChar();
1425
1426                                                         /* We got a parameter back from ModeHandler::ModeSet,
1427                                                          * are we supposed to be sending one out right now?
1428                                                          */
1429                                                         if (ret.second.length())
1430                                                         {
1431                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1432                                                                         /* Yes we're supposed to be sending out
1433                                                                          * the parameter. Make sure it goes
1434                                                                          */
1435                                                                         newparams.push_back(ret.second);
1436                                                         }
1437
1438                                                 }
1439                                         break;
1440                                 }
1441                         }
1442
1443                         /* Update the parameters for FMODE with the new 'bounced' string */
1444                         newparams[2] = modebounce;
1445                         /* Only send it back the way it came, no need to send it anywhere else */
1446                         Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1447                         Instance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1448                 }
1449                 else
1450                 {
1451                         Instance->Log(DEBUG,"Allow modes, TS lower for sender");
1452                         /* The server was ulined, but something iffy is up with the TS.
1453                          * Sound the alarm bells!
1454                          */
1455                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1456                         {
1457                                 this->Instance->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());
1458                         }
1459                         /* Allow the mode, route it to either server or user command handling */
1460                         if (smode)
1461                                 this->Instance->SendMode(modelist,n,who);
1462                         else
1463                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1464
1465                         /* HOT POTATO! PASS IT ON! */
1466                         Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1467                 }
1468                 /* Are we supposed to free the userrec? */
1469                 if (smode)
1470                         DELETE(who);
1471
1472                 return true;
1473         }
1474
1475         /** FTOPIC command */
1476         bool ForceTopic(const std::string &source, std::deque<std::string> &params)
1477         {
1478                 if (params.size() != 4)
1479                         return true;
1480                 time_t ts = atoi(params[1].c_str());
1481                 std::string nsource = source;
1482
1483                 chanrec* c = this->Instance->FindChan(params[0]);
1484                 if (c)
1485                 {
1486                         if ((ts >= c->topicset) || (!*c->topic))
1487                         {
1488                                 std::string oldtopic = c->topic;
1489                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1490                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1491                                 c->topicset = ts;
1492                                 /* if the topic text is the same as the current topic,
1493                                  * dont bother to send the TOPIC command out, just silently
1494                                  * update the set time and set nick.
1495                                  */
1496                                 if (oldtopic != params[3])
1497                                 {
1498                                         userrec* user = this->Instance->FindNick(source);
1499                                         if (!user)
1500                                         {
1501                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1502                                         }
1503                                         else
1504                                         {
1505                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1506                                                 nsource = user->server;
1507                                         }
1508                                         /* all done, send it on its way */
1509                                         params[3] = ":" + params[3];
1510                                         Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
1511                                 }
1512                         }
1513
1514                 }
1515
1516                 return true;
1517         }
1518
1519         /** FJOIN, similar to TS6 SJOIN, but not quite. */
1520         bool ForceJoin(const std::string &source, std::deque<std::string> &params)
1521         {
1522                 /* 1.1 FJOIN works as follows:
1523                  *
1524                  * Each FJOIN is sent along with a timestamp, and the side with the lowest
1525                  * timestamp 'wins'. From this point on we will refer to this side as the
1526                  * winner. The side with the higher timestamp loses, from this point on we
1527                  * will call this side the loser or losing side. This should be familiar to
1528                  * anyone who's dealt with dreamforge or TS6 before.
1529                  *
1530                  * When two sides of a split heal and this occurs, the following things
1531                  * will happen:
1532                  *
1533                  * If the timestamps are exactly equal, both sides merge their privilages
1534                  * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
1535                  * re-created during a split, this is safe to do.
1536                  *
1537                  *
1538                  * If the timestamps are NOT equal, the losing side removes all privilage
1539                  * modes from all of its users that currently exist in the channel, before
1540                  * introducing new users into the channel which are listed in the FJOIN
1541                  * command's parameters. This means, all modes +ohv, and privilages added
1542                  * by modules, such as +qa. The losing side then LOWERS its timestamp value
1543                  * of the channel to match that of the winning side, and the modes of the
1544                  * users of the winning side are merged in with the losing side. The loser
1545                  * then sends out a set of FMODE commands which 'confirm' that it just
1546                  * removed all privilage modes from its existing users, which allows for
1547                  * services packages to still work correctly without needing to know the
1548                  * timestamping rules which InspIRCd follows. In TS6 servers this is always
1549                  * a problem, and services packages must contain code which explicitly
1550                  * behaves as TS6 does, removing ops from the losing side of a split where
1551                  * neccessary within its internal records, as this state information is
1552                  * not explicitly echoed out in that protocol.
1553                  *
1554                  * The winning side on the other hand will ignore all user modes from the
1555                  * losing side, so only its own modes get applied. Life is simple for those
1556                  * who succeed at internets. :-)
1557                  *
1558                  * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
1559                  * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
1560                  * you ask? Well, quite simply because we don't need to. They'll be sent
1561                  * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
1562                  * the losing side sends any modes for the channel which shouldnt win,
1563                  * they wont as their timestamp will be too high :-)
1564                  */
1565
1566                 if (params.size() < 3)
1567                         return true;
1568
1569                 char first[MAXBUF];             /* The first parameter of the mode command */
1570                 char modestring[MAXBUF];        /* The mode sequence (2nd parameter) of the mode command */
1571                 char* mode_users[127];          /* The values used by the mode command */
1572                 memset(&mode_users,0,sizeof(mode_users));       /* Initialize mode parameters */
1573                 mode_users[0] = first;          /* Set this up to be our on-stack value */
1574                 mode_users[1] = modestring;     /* Same here as above */
1575                 strcpy(modestring,"+");         /* Initialize the mode sequence to just '+' */
1576                 unsigned int modectr = 2;       /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */
1577
1578                 userrec* who = NULL;                    /* User we are currently checking */
1579                 std::string channel = params[0];        /* Channel name, as a string */
1580                 time_t TS = atoi(params[1].c_str());    /* Timestamp given to us for remote side */
1581
1582                 /* Try and find the channel */
1583                 chanrec* chan = this->Instance->FindChan(channel);
1584
1585                 /* Initialize channel name in the mode parameters */
1586                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1587
1588                 /* default TS is a high value, which if we dont have this
1589                  * channel will let the other side apply their modes.
1590                  */
1591                 time_t ourTS = time(NULL)+600;
1592
1593                 /* Does this channel exist? if it does, get its REAL timestamp */
1594                 if (chan)
1595                         ourTS = chan->age;
1596
1597                 /* In 1.1, if they have the newer channel, we immediately clear
1598                  * all status modes from our users. We then accept their modes.
1599                  * If WE have the newer channel its the other side's job to do this.
1600                  * Note that this causes the losing server to send out confirming
1601                  * FMODE lines.
1602                  */
1603                 if (ourTS > TS)
1604                 {
1605                         std::deque<std::string> param_list;
1606
1607                         if (chan)
1608                                 chan->age = TS;
1609
1610                         /* Lower the TS here */
1611                         if (Utils->AnnounceTSChange && chan)
1612                                 chan->WriteChannelWithServ(Instance->Config->ServerName,
1613                                 "TS for %s changed from %lu to %lu", chan->name, ourTS, TS);
1614                         ourTS = TS;
1615
1616                         param_list.push_back(channel);
1617                         /* Zap all the privilage modes on our side */
1618                         this->RemoveStatus(Instance->Config->ServerName, param_list);
1619                 }
1620
1621                 /* Put the final parameter of the FJOIN into a tokenstream ready to split it */
1622                 irc::tokenstream users(params[2]);
1623                 std::string item = "*";
1624
1625                 /* do this first, so our mode reversals are correctly received by other servers
1626                  * if there is a TS collision.
1627                  */
1628                 params[2] = ":" + params[2];
1629                 Utils->DoOneToAllButSender(source,"FJOIN",params,source);
1630
1631                 /* Now, process every 'prefixes,nick' pair */
1632                 while (item != "")
1633                 {
1634                         /* Find next user */
1635                         item = users.GetToken();
1636
1637                         const char* usr = item.c_str();
1638
1639                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1640                          * (is this even possible?) */
1641                         if (usr && *usr)
1642                         {
1643                                 const char* permissions = usr;
1644                                 int ntimes = 0;
1645                                 char* nm = new char[MAXBUF];
1646                                 char* tnm = nm;
1647
1648                                 /* Iterate through all the prefix values, convert them from prefixes
1649                                  * to mode letters, and append them to the mode sequence
1650                                  */
1651                                 while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
1652                                 {
1653                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1654                                         if (mh)
1655                                         {
1656                                                 /* This is a valid prefix */
1657                                                 ntimes++;
1658                                                 *tnm++ = mh->GetModeChar();
1659                                         }
1660                                         else
1661                                         {
1662                                                 /* Not a valid prefix...
1663                                                  * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
1664                                                  */
1665                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
1666                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
1667                                                 return false;
1668                                         }
1669                                         usr++;
1670                                         permissions++;
1671                                 }
1672
1673                                 /* Null terminate modes */
1674                                 *tnm = 0;
1675                                 /* Advance past the comma, to the nick */
1676                                 usr++;
1677
1678                                 /* Check the user actually exists */
1679                                 who = this->Instance->FindNick(usr);
1680                                 if (who)
1681                                 {
1682                                         /* Did they get any modes? How many times? */
1683                                         strlcat(modestring, nm, MAXBUF);
1684                                         for (int k = 0; k < ntimes; k++)
1685                                                 mode_users[modectr++] = strdup(usr);
1686
1687                                         /* Free temporary buffer used for mode sequence */
1688                                         delete[] nm;
1689
1690                                         /* Check that the user's 'direction' is correct
1691                                          * based on the server sending the FJOIN. We must
1692                                          * check each nickname in turn, because the origin of
1693                                          * the FJOIN may be different to the origin of the nicks
1694                                          * in the command itself.
1695                                          */
1696                                         TreeServer* route_back_again = Utils->BestRouteTo(who->server);
1697                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
1698                                         {
1699                                                 /* Oh dear oh dear. */
1700                                                 Instance->Log(DEBUG,"Fake direction in FJOIN, user '%s'",who->nick);
1701                                                 continue;
1702                                         }
1703                                         /* Finally, we can actually place the user into the channel.
1704                                          * We're sure its right. Final answer, phone a friend.
1705                                          */
1706                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
1707
1708                                         /* Have we already queued up MAXMODES modes with parameters
1709                                          * (+qaohv) ready to be sent to the server?
1710                                          */
1711                                         if (modectr >= (MAXMODES-1))
1712                                         {
1713                                                 /* Only actually give the users any status if we lost
1714                                                  * the FJOIN or drew (equal timestamps).
1715                                                  * It isn't actually possible for ourTS to be > TS here,
1716                                                  * only possible to actually have ourTS == TS, or
1717                                                  * ourTS < TS, because if we lost, we already lowered
1718                                                  * our TS above before we entered this loop. We only
1719                                                  * check >= as a safety measure, in case someone stuffed
1720                                                  * up. If someone DID stuff up, it was most likely me.
1721                                                  * Note: I do not like baseball bats in the face...
1722                                                  */
1723                                                 if (ourTS >= TS)
1724                                                 {
1725                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1726                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1727
1728                                                         /* Something stuffed up, and for some reason, the timestamp is
1729                                                          * NOT lowered right now and should be. Lower it. Usually this
1730                                                          * code won't be executed, doubtless someone will remove it some
1731                                                          * day soon.
1732                                                          */
1733                                                         if (ourTS > TS)
1734                                                         {
1735                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1736                                                                 chan->age = TS;
1737                                                                 ourTS = TS;
1738                                                         }
1739                                                 }
1740
1741                                                 /* Reset all this back to defaults, and
1742                                                  * free any ram we have left allocated.
1743                                                  */
1744                                                 strcpy(mode_users[1],"+");
1745                                                 for (unsigned int f = 2; f < modectr; f++)
1746                                                         free(mode_users[f]);
1747                                                 modectr = 2;
1748                                         }
1749                                 }
1750                                 else
1751                                 {
1752                                         /* Remember to free this */
1753                                         delete[] nm;
1754                                         /* If we got here, there's a nick in FJOIN which doesnt exist on this server.
1755                                          * We don't try to process the nickname here (that WOULD cause a segfault because
1756                                          * we'd be playing with null pointers) however, we DO pass the nickname on, just
1757                                          * in case somehow we're desynched, so that other users which might be able to see
1758                                          * the nickname get their fair chance to process it.
1759                                          */
1760                                         Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
1761                                         continue;
1762                                 }
1763                         }
1764                 }
1765
1766                 /* there werent enough modes built up to flush it during FJOIN,
1767                  * or, there are a number left over. flush them out.
1768                  */
1769                 if ((modectr > 2) && (who) && (chan))
1770                 {
1771                         if (ourTS >= TS)
1772                         {
1773                                 /* Our channel is newer than theirs. Evil deeds must be afoot. */
1774                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1775                                 /* Yet again, we can't actually get a true value here, if everything else
1776                                  * is working as it should.
1777                                  */
1778                                 if (ourTS > TS)
1779                                 {
1780                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1781                                         chan->age = TS;
1782                                         ourTS = TS;
1783                                 }
1784                         }
1785
1786                         /* Free anything we have left to free */
1787                         for (unsigned int f = 2; f < modectr; f++)
1788                                 free(mode_users[f]);
1789                 }
1790
1791                 /* All done. That wasnt so bad was it, you can wipe
1792                  * the sweat from your forehead now. :-)
1793                  */
1794                 return true;
1795         }
1796
1797         /** NICK command */
1798         bool IntroduceClient(const std::string &source, std::deque<std::string> &params)
1799         {
1800                 if (params.size() < 8)
1801                         return true;
1802                 if (params.size() > 8)
1803                 {
1804                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1805                         return true;
1806                 }
1807                 // NICK age nick host dhost ident +modes ip :gecos
1808                 //       0    1   2     3     4      5   6     7
1809                 time_t age = atoi(params[0].c_str());
1810
1811                 /* This used to have a pretty craq'y loop doing the same thing,
1812                  * now we just let the STL do the hard work (more efficiently)
1813                  */
1814                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1815                 if (pos_after_plus != std::string::npos)
1816                         params[5] = params[5].substr(pos_after_plus);
1817
1818                 const char* tempnick = params[1].c_str();
1819                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1820
1821                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1822
1823                 if (iter != this->Instance->clientlist.end())
1824                 {
1825                         // nick collision
1826                         Instance->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);
1827                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1828                         userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
1829                         return true;
1830                 }
1831
1832                 userrec* _new = new userrec(this->Instance);
1833                 this->Instance->clientlist[tempnick] = _new;
1834                 _new->SetFd(FD_MAGIC_NUMBER);
1835                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1836                 strlcpy(_new->host, params[2].c_str(),63);
1837                 strlcpy(_new->dhost, params[3].c_str(),63);
1838                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1839                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1840                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1841                 _new->registered = REG_ALL;
1842                 _new->signon = age;
1843
1844                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1845                         _new->modes[(*v)-65] = 1;
1846
1847 #ifdef SUPPORT_IP6LINKS
1848                 if (params[6].find_first_of(":") != std::string::npos)
1849                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1850                 else
1851 #endif
1852                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1853
1854                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1855
1856                 params[7] = ":" + params[7];
1857                 Utils->DoOneToAllButSender(source,"NICK",params,source);
1858
1859                 // Increment the Source Servers User Count..
1860                 TreeServer* SourceServer = Utils->FindServer(source);
1861                 if (SourceServer)
1862                 {
1863                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1864                         SourceServer->AddUserCount();
1865                 }
1866
1867                 FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
1868
1869                 return true;
1870         }
1871
1872         /** Send one or more FJOINs for a channel of users.
1873          * If the length of a single line is more than 480-NICKMAX
1874          * in length, it is split over multiple lines.
1875          */
1876         void SendFJoins(TreeServer* Current, chanrec* c)
1877         {
1878                 std::string buffer;
1879
1880                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1881                 char list[MAXBUF];
1882                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1883
1884                 size_t dlen, curlen;
1885                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1886                 int numusers = 0;
1887                 char* ptr = list + dlen;
1888
1889                 CUList *ulist = c->GetUsers();
1890                 std::string modes = "";
1891                 std::string params = "";
1892
1893                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1894                 {
1895                         // The first parameter gets a : before it
1896                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1897
1898                         curlen += ptrlen;
1899                         ptr += ptrlen;
1900
1901                         numusers++;
1902
1903                         if (curlen > (480-NICKMAX))
1904                         {
1905                                 buffer.append(list).append("\n");
1906
1907                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1908                                 ptr = list + dlen;
1909                                 ptrlen = 0;
1910                                 numusers = 0;
1911                         }
1912                 }
1913
1914                 if (numusers)
1915                         buffer.append(list).append("\n");
1916
1917                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1918                 {
1919                         modes.append("b");
1920                         params.append(" ").append(b->data);
1921
1922                         if (params.length() >= MAXMODES)
1923                         {
1924                                 /* Wrap at MAXMODES */
1925                                 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\n");
1926                                 modes = "";
1927                                 params = "";
1928                         }
1929                 }
1930
1931                 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(c->ChanModes(true));
1932
1933                 /* Only send these if there are any */
1934                 if (!modes.empty())
1935                         buffer.append("\n").append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
1936
1937                 this->WriteLine(buffer);
1938         }
1939
1940         /** Send G, Q, Z and E lines */
1941         void SendXLines(TreeServer* Current)
1942         {
1943                 char data[MAXBUF];
1944                 std::string buffer;
1945                 std::string n = this->Instance->Config->ServerName;
1946                 const char* sn = n.c_str();
1947                 int iterations = 0;
1948                 /* Yes, these arent too nice looking, but they get the job done */
1949                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1950                 {
1951                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1952                         buffer.append(data);
1953                 }
1954                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1955                 {
1956                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1957                         buffer.append(data);
1958                 }
1959                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1960                 {
1961                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s\n",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1962                         buffer.append(data);
1963                 }
1964                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1965                 {
1966                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s\n",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1967                         buffer.append(data);
1968                 }
1969                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1970                 {
1971                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1972                         buffer.append(data);
1973                 }
1974                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1975                 {
1976                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1977                         buffer.append(data);
1978                 }
1979                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1980                 {
1981                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s\n",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1982                         buffer.append(data);
1983                 }
1984                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1985                 {
1986                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s\n",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1987                         buffer.append(data);
1988                 }
1989
1990                 if (!buffer.empty())
1991                         this->WriteLine(buffer);
1992         }
1993
1994         /** Send channel modes and topics */
1995         void SendChannelModes(TreeServer* Current)
1996         {
1997                 char data[MAXBUF];
1998                 std::deque<std::string> list;
1999                 int iterations = 0;
2000                 std::string n = this->Instance->Config->ServerName;
2001                 const char* sn = n.c_str();
2002                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
2003                 {
2004                         SendFJoins(Current, c->second);
2005                         if (*c->second->topic)
2006                         {
2007                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
2008                                 this->WriteLine(data);
2009                         }
2010                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
2011                         list.clear();
2012                         c->second->GetExtList(list);
2013                         for (unsigned int j = 0; j < list.size(); j++)
2014                         {
2015                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
2016                         }
2017                 }
2018         }
2019
2020         /** send all users and their oper state/modes */
2021         void SendUsers(TreeServer* Current)
2022         {
2023                 char data[MAXBUF];
2024                 std::deque<std::string> list;
2025                 std::string dataline;
2026                 int iterations = 0;
2027                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
2028                 {
2029                         if (u->second->registered == REG_ALL)
2030                         {
2031                                 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);
2032                                 this->WriteLine(data);
2033                                 if (*u->second->oper)
2034                                 {
2035                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->nick, u->second->oper);
2036                                         this->WriteLine(data);
2037                                 }
2038                                 if (*u->second->awaymsg)
2039                                 {
2040                                         snprintf(data,MAXBUF,":%s AWAY :%s", u->second->nick, u->second->awaymsg);
2041                                         this->WriteLine(data);
2042                                 }
2043                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
2044                                 list.clear();
2045                                 u->second->GetExtList(list);
2046                                 for (unsigned int j = 0; j < list.size(); j++)
2047                                 {
2048                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
2049                                 }
2050                         }
2051                 }
2052         }
2053
2054         /** This function is called when we want to send a netburst to a local
2055          * server. There is a set order we must do this, because for example
2056          * users require their servers to exist, and channels require their
2057          * users to exist. You get the idea.
2058          */
2059         void DoBurst(TreeServer* s)
2060         {
2061                 std::string burst = "BURST "+ConvToStr(time(NULL));
2062                 std::string endburst = "ENDBURST";
2063                 // Because by the end of the netburst, it  could be gone!
2064                 std::string name = s->GetName();
2065                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
2066                 this->WriteLine(burst);
2067                 /* send our version string */
2068                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
2069                 /* Send server tree */
2070                 this->SendServers(Utils->TreeRoot,s,1);
2071                 /* Send users and their oper status */
2072                 this->SendUsers(s);
2073                 /* Send everything else (channel modes, xlines etc) */
2074                 this->SendChannelModes(s);
2075                 this->SendXLines(s);
2076                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
2077                 this->WriteLine(endburst);
2078                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
2079         }
2080
2081         /** This function is called when we receive data from a remote
2082          * server. We buffer the data in a std::string (it doesnt stay
2083          * there for long), reading using InspSocket::Read() which can
2084          * read up to 16 kilobytes in one operation.
2085          *
2086          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
2087          * THE SOCKET OBJECT FOR US.
2088          */
2089         virtual bool OnDataReady()
2090         {
2091                 char* data = this->Read();
2092                 /* Check that the data read is a valid pointer and it has some content */
2093                 if (data && *data)
2094                 {
2095                         this->in_buffer.append(data);
2096                         /* While there is at least one new line in the buffer,
2097                          * do something useful (we hope!) with it.
2098                          */
2099                         while (in_buffer.find("\n") != std::string::npos)
2100                         {
2101                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
2102                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
2103                                 /* Use rfind here not find, as theres more
2104                                  * chance of the \r being near the end of the
2105                                  * string, not the start.
2106                                  */
2107                                 if (ret.find("\r") != std::string::npos)
2108                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
2109                                 /* Process this one, abort if it
2110                                  * didnt return true.
2111                                  */
2112                                 if (this->ctx_in)
2113                                 {
2114                                         char out[1024];
2115                                         char result[1024];
2116                                         memset(result,0,1024);
2117                                         memset(out,0,1024);
2118                                         /* ERROR + CAPAB is still allowed unencryped */
2119                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
2120                                         {
2121                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
2122                                                 if ((nbytes > 0) && (nbytes < 1024))
2123                                                 {
2124                                                         ctx_in->Decrypt(out, result, nbytes, 0);
2125                                                         for (int t = 0; t < nbytes; t++)
2126                                                         {
2127                                                                 if (result[t] == '\7')
2128                                                                 {
2129                                                                         /* We only need to stick a \0 on the
2130                                                                          * first \7, the rest will be lost
2131                                                                          */
2132                                                                         result[t] = 0;
2133                                                                         break;
2134                                                                 }
2135                                                         }
2136                                                         ret = result;
2137                                                 }
2138                                         }
2139                                 }
2140                                 if (!this->ProcessLine(ret))
2141                                 {
2142                                         return false;
2143                                 }
2144                         }
2145                         return true;
2146                 }
2147                 /* EAGAIN returns an empty but non-NULL string, so this
2148                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2149                  */
2150                 return (data && !*data);
2151         }
2152
2153         int WriteLine(std::string line)
2154         {
2155                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2156                 if (this->ctx_out)
2157                 {
2158                         char result[10240];
2159                         char result64[10240];
2160                         if (this->keylength)
2161                         {
2162                                 // pad it to the key length
2163                                 int n = this->keylength - (line.length() % this->keylength);
2164                                 if (n)
2165                                         line.append(n,'\7');
2166                         }
2167                         unsigned int ll = line.length();
2168                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2169                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2170                         line = result64;
2171                 }
2172                 line.append("\r\n");
2173                 return this->Write(line);
2174         }
2175
2176         /* Handle ERROR command */
2177         bool Error(std::deque<std::string> &params)
2178         {
2179                 if (params.size() < 1)
2180                         return false;
2181                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2182                 /* we will return false to cause the socket to close. */
2183                 return false;
2184         }
2185
2186         /** remote MOTD. leet, huh? */
2187         bool Motd(const std::string &prefix, std::deque<std::string> &params)
2188         {
2189                 if (params.size() > 0)
2190                 {
2191                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2192                         {
2193                                 /* It's for our server */
2194                                 string_list results;
2195                                 userrec* source = this->Instance->FindNick(prefix);
2196
2197                                 if (source)
2198                                 {
2199                                         std::deque<std::string> par;
2200                                         par.push_back(prefix);
2201                                         par.push_back("");
2202
2203                                         if (!Instance->Config->MOTD.size())
2204                                         {
2205                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2206                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2207                                                 return true;
2208                                         }
2209
2210                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2211                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2212
2213                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2214                                         {
2215                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2216                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2217                                         }
2218
2219                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2220                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2221                                 }
2222                         }
2223                         else
2224                         {
2225                                 /* Pass it on */
2226                                 userrec* source = this->Instance->FindNick(prefix);
2227                                 if (source)
2228                                         Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
2229                         }
2230                 }
2231                 return true;
2232         }
2233
2234         /** remote ADMIN. leet, huh? */
2235         bool Admin(const std::string &prefix, std::deque<std::string> &params)
2236         {
2237                 if (params.size() > 0)
2238                 {
2239                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2240                         {
2241                                 /* It's for our server */
2242                                 string_list results;
2243                                 userrec* source = this->Instance->FindNick(prefix);
2244
2245                                 if (source)
2246                                 {
2247                                         std::deque<std::string> par;
2248                                         par.push_back(prefix);
2249                                         par.push_back("");
2250
2251                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2252                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2253
2254                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2255                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2256
2257                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2258                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2259
2260                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2261                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2262                                 }
2263                         }
2264                         else
2265                         {
2266                                 /* Pass it on */
2267                                 userrec* source = this->Instance->FindNick(prefix);
2268                                 if (source)
2269                                         Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
2270                         }
2271                 }
2272                 return true;
2273         }
2274
2275         bool Stats(const std::string &prefix, std::deque<std::string> &params)
2276         {
2277                 /* Get the reply to a STATS query if it matches this servername,
2278                  * and send it back as a load of PUSH queries
2279                  */
2280                 if (params.size() > 1)
2281                 {
2282                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2283                         {
2284                                 /* It's for our server */
2285                                 string_list results;
2286                                 userrec* source = this->Instance->FindNick(prefix);
2287                                 if (source)
2288                                 {
2289                                         std::deque<std::string> par;
2290                                         par.push_back(prefix);
2291                                         par.push_back("");
2292                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2293                                         for (size_t i = 0; i < results.size(); i++)
2294                                         {
2295                                                 par[1] = "::" + results[i];
2296                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2297                                         }
2298                                 }
2299                         }
2300                         else
2301                         {
2302                                 /* Pass it on */
2303                                 userrec* source = this->Instance->FindNick(prefix);
2304                                 if (source)
2305                                         Utils->DoOneToOne(prefix, "STATS", params, params[1]);
2306                         }
2307                 }
2308                 return true;
2309         }
2310
2311
2312         /** Because the core won't let users or even SERVERS set +o,
2313          * we use the OPERTYPE command to do this.
2314          */
2315         bool OperType(const std::string &prefix, std::deque<std::string> &params)
2316         {
2317                 if (params.size() != 1)
2318                 {
2319                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2320                         return true;
2321                 }
2322                 std::string opertype = params[0];
2323                 userrec* u = this->Instance->FindNick(prefix);
2324                 if (u)
2325                 {
2326                         u->modes[UM_OPERATOR] = 1;
2327                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2328                         Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2329                 }
2330                 return true;
2331         }
2332
2333         /** Because Andy insists that services-compatible servers must
2334          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2335          */
2336         bool ForceNick(const std::string &prefix, std::deque<std::string> &params)
2337         {
2338                 if (params.size() < 3)
2339                         return true;
2340
2341                 userrec* u = this->Instance->FindNick(params[0]);
2342
2343                 if (u)
2344                 {
2345                         Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2346                         if (IS_LOCAL(u))
2347                         {
2348                                 std::deque<std::string> par;
2349                                 par.push_back(params[1]);
2350                                 /* This is not required as one is sent in OnUserPostNick below
2351                                  */
2352                                 //Utils->DoOneToMany(u->nick,"NICK",par);
2353                                 if (!u->ForceNickChange(params[1].c_str()))
2354                                 {
2355                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2356                                         return true;
2357                                 }
2358                                 u->age = atoi(params[2].c_str());
2359                         }
2360                 }
2361                 return true;
2362         }
2363
2364         bool ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
2365         {
2366                 if (params.size() < 2)
2367                         return true;
2368
2369                 userrec* u = this->Instance->FindNick(params[0]);
2370
2371                 if (u)
2372                 {
2373                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2374                         Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2375                 }
2376                 return true;
2377         }
2378
2379         bool RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
2380         {
2381                 if (params.size() < 1)
2382                         return false;
2383
2384                 std::string servermask = params[0];
2385
2386                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2387                 {
2388                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2389                         this->Instance->RehashServer();
2390                         Utils->ReadConfiguration(false);
2391                         InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
2392                 }
2393                 Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
2394                 return true;
2395         }
2396
2397         bool RemoteKill(const std::string &prefix, std::deque<std::string> &params)
2398         {
2399                 if (params.size() != 2)
2400                         return true;
2401
2402                 std::string nick = params[0];
2403                 userrec* u = this->Instance->FindNick(prefix);
2404                 userrec* who = this->Instance->FindNick(nick);
2405
2406                 if (who)
2407                 {
2408                         /* Prepend kill source, if we don't have one */
2409                         std::string sourceserv = prefix;
2410                         if (u)
2411                         {
2412                                 sourceserv = u->server;
2413                         }
2414                         if (*(params[1].c_str()) != '[')
2415                         {
2416                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2417                         }
2418                         std::string reason = params[1];
2419                         params[1] = ":" + params[1];
2420                         Utils->DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2421                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2422                         userrec::QuitUser(this->Instance,who,reason);
2423                 }
2424                 return true;
2425         }
2426
2427         bool LocalPong(const std::string &prefix, std::deque<std::string> &params)
2428         {
2429                 if (params.size() < 1)
2430                         return true;
2431
2432                 if (params.size() == 1)
2433                 {
2434                         TreeServer* ServerSource = Utils->FindServer(prefix);
2435                         if (ServerSource)
2436                         {
2437                                 ServerSource->SetPingFlag();
2438                         }
2439                 }
2440                 else
2441                 {
2442                         std::string forwardto = params[1];
2443                         if (forwardto == this->Instance->Config->ServerName)
2444                         {
2445                                 /*
2446                                  * this is a PONG for us
2447                                  * if the prefix is a user, check theyre local, and if they are,
2448                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2449                                  * Services might want to send these s->s, but we dont need to yet.
2450                                  */
2451                                 userrec* u = this->Instance->FindNick(prefix);
2452
2453                                 if (u)
2454                                 {
2455                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2456                                 }
2457                         }
2458                         else
2459                         {
2460                                 // not for us, pass it on :)
2461                                 Utils->DoOneToOne(prefix,"PONG",params,forwardto);
2462                         }
2463                 }
2464
2465                 return true;
2466         }
2467
2468         bool MetaData(const std::string &prefix, std::deque<std::string> &params)
2469         {
2470                 if (params.size() < 3)
2471                         return true;
2472
2473                 TreeServer* ServerSource = Utils->FindServer(prefix);
2474
2475                 if (ServerSource)
2476                 {
2477                         if (params[0] == "*")
2478                         {
2479                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2480                         }
2481                         else if (*(params[0].c_str()) == '#')
2482                         {
2483                                 chanrec* c = this->Instance->FindChan(params[0]);
2484                                 if (c)
2485                                 {
2486                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2487                                 }
2488                         }
2489                         else if (*(params[0].c_str()) != '#')
2490                         {
2491                                 userrec* u = this->Instance->FindNick(params[0]);
2492                                 if (u)
2493                                 {
2494                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2495                                 }
2496                         }
2497                 }
2498
2499                 params[2] = ":" + params[2];
2500                 Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
2501                 return true;
2502         }
2503
2504         bool ServerVersion(const std::string &prefix, std::deque<std::string> &params)
2505         {
2506                 if (params.size() < 1)
2507                         return true;
2508
2509                 TreeServer* ServerSource = Utils->FindServer(prefix);
2510
2511                 if (ServerSource)
2512                 {
2513                         ServerSource->SetVersion(params[0]);
2514                 }
2515                 params[0] = ":" + params[0];
2516                 Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
2517                 return true;
2518         }
2519
2520         bool ChangeHost(const std::string &prefix, std::deque<std::string> &params)
2521         {
2522                 if (params.size() < 1)
2523                         return true;
2524
2525                 userrec* u = this->Instance->FindNick(prefix);
2526
2527                 if (u)
2528                 {
2529                         u->ChangeDisplayedHost(params[0].c_str());
2530                         Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
2531                 }
2532                 return true;
2533         }
2534
2535         bool AddLine(const std::string &prefix, std::deque<std::string> &params)
2536         {
2537                 if (params.size() < 6)
2538                         return true;
2539
2540                 bool propogate = false;
2541
2542                 switch (*(params[0].c_str()))
2543                 {
2544                         case 'Z':
2545                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2546                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2547                         break;
2548                         case 'Q':
2549                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2550                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2551                         break;
2552                         case 'E':
2553                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2554                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2555                         break;
2556                         case 'G':
2557                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2558                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2559                         break;
2560                         case 'K':
2561                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2562                         break;
2563                         default:
2564                                 /* Just in case... */
2565                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2566                                 propogate = false;
2567                         break;
2568                 }
2569
2570                 /* Send it on its way */
2571                 if (propogate)
2572                 {
2573                         if (atoi(params[4].c_str()))
2574                         {
2575                                 this->Instance->SNO->WriteToSnoMask('x',"%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());
2576                         }
2577                         else
2578                         {
2579                                 this->Instance->SNO->WriteToSnoMask('x',"%s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
2580                         }
2581                         params[5] = ":" + params[5];
2582                         Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2583                 }
2584                 if (!this->bursting)
2585                 {
2586                         Instance->Log(DEBUG,"Applying lines...");
2587                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2588                 }
2589                 return true;
2590         }
2591
2592         bool ChangeName(const std::string &prefix, std::deque<std::string> &params)
2593         {
2594                 if (params.size() < 1)
2595                         return true;
2596
2597                 userrec* u = this->Instance->FindNick(prefix);
2598
2599                 if (u)
2600                 {
2601                         u->ChangeName(params[0].c_str());
2602                         params[0] = ":" + params[0];
2603                         Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
2604                 }
2605                 return true;
2606         }
2607
2608         bool Whois(const std::string &prefix, std::deque<std::string> &params)
2609         {
2610                 if (params.size() < 1)
2611                         return true;
2612
2613                 Instance->Log(DEBUG,"In IDLE command");
2614                 userrec* u = this->Instance->FindNick(prefix);
2615
2616                 if (u)
2617                 {
2618                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2619                         // an incoming request
2620                         if (params.size() == 1)
2621                         {
2622                                 userrec* x = this->Instance->FindNick(params[0]);
2623                                 if ((x) && (IS_LOCAL(x)))
2624                                 {
2625                                         userrec* x = this->Instance->FindNick(params[0]);
2626                                         char signon[MAXBUF];
2627                                         char idle[MAXBUF];
2628
2629                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2630                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2631                                         std::deque<std::string> par;
2632                                         par.push_back(prefix);
2633                                         par.push_back(signon);
2634                                         par.push_back(idle);
2635                                         // ours, we're done, pass it BACK
2636                                         Utils->DoOneToOne(params[0],"IDLE",par,u->server);
2637                                 }
2638                                 else
2639                                 {
2640                                         // not ours pass it on
2641                                         Utils->DoOneToOne(prefix,"IDLE",params,x->server);
2642                                 }
2643                         }
2644                         else if (params.size() == 3)
2645                         {
2646                                 std::string who_did_the_whois = params[0];
2647                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2648                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2649                                 {
2650                                         // an incoming reply to a whois we sent out
2651                                         std::string nick_whoised = prefix;
2652                                         unsigned long signon = atoi(params[1].c_str());
2653                                         unsigned long idle = atoi(params[2].c_str());
2654                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2655                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2656                                 }
2657                                 else
2658                                 {
2659                                         // not ours, pass it on
2660                                         Utils->DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2661                                 }
2662                         }
2663                 }
2664                 return true;
2665         }
2666
2667         bool Push(const std::string &prefix, std::deque<std::string> &params)
2668         {
2669                 if (params.size() < 2)
2670                         return true;
2671
2672                 userrec* u = this->Instance->FindNick(params[0]);
2673
2674                 if (!u)
2675                         return true;
2676
2677                 if (IS_LOCAL(u))
2678                 {
2679                         u->Write(params[1]);
2680                 }
2681                 else
2682                 {
2683                         // continue the raw onwards
2684                         params[1] = ":" + params[1];
2685                         Utils->DoOneToOne(prefix,"PUSH",params,u->server);
2686                 }
2687                 return true;
2688         }
2689
2690         bool Time(const std::string &prefix, std::deque<std::string> &params)
2691         {
2692                 // :source.server TIME remote.server sendernick
2693                 // :remote.server TIME source.server sendernick TS
2694                 if (params.size() == 2)
2695                 {
2696                         // someone querying our time?
2697                         if (this->Instance->Config->ServerName == params[0])
2698                         {
2699                                 userrec* u = this->Instance->FindNick(params[1]);
2700                                 if (u)
2701                                 {
2702                                         char curtime[256];
2703                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2704                                         params.push_back(curtime);
2705                                         params[0] = prefix;
2706                                         Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2707                                 }
2708                         }
2709                         else
2710                         {
2711                                 // not us, pass it on
2712                                 userrec* u = this->Instance->FindNick(params[1]);
2713                                 if (u)
2714                                         Utils->DoOneToOne(prefix,"TIME",params,params[0]);
2715                         }
2716                 }
2717                 else if (params.size() == 3)
2718                 {
2719                         // a response to a previous TIME
2720                         userrec* u = this->Instance->FindNick(params[1]);
2721                         if ((u) && (IS_LOCAL(u)))
2722                         {
2723                         time_t rawtime = atol(params[2].c_str());
2724                         struct tm * timeinfo;
2725                         timeinfo = localtime(&rawtime);
2726                                 char tms[26];
2727                                 snprintf(tms,26,"%s",asctime(timeinfo));
2728                                 tms[24] = 0;
2729                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2730                         }
2731                         else
2732                         {
2733                                 if (u)
2734                                         Utils->DoOneToOne(prefix,"TIME",params,u->server);
2735                         }
2736                 }
2737                 return true;
2738         }
2739
2740         bool LocalPing(const std::string &prefix, std::deque<std::string> &params)
2741         {
2742                 if (params.size() < 1)
2743                         return true;
2744
2745                 if (params.size() == 1)
2746                 {
2747                         std::string stufftobounce = params[0];
2748                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2749                         return true;
2750                 }
2751                 else
2752                 {
2753                         std::string forwardto = params[1];
2754                         if (forwardto == this->Instance->Config->ServerName)
2755                         {
2756                                 // this is a ping for us, send back PONG to the requesting server
2757                                 params[1] = params[0];
2758                                 params[0] = forwardto;
2759                                 Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
2760                         }
2761                         else
2762                         {
2763                                 // not for us, pass it on :)
2764                                 Utils->DoOneToOne(prefix,"PING",params,forwardto);
2765                         }
2766                         return true;
2767                 }
2768         }
2769
2770         bool RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
2771         {
2772                 if (params.size() < 1)
2773                         return true;
2774
2775                 chanrec* c = Instance->FindChan(params[0]);
2776
2777                 if (c)
2778                 {
2779                         irc::modestacker modestack(false);
2780                         CUList *ulist = c->GetUsers();
2781                         const char* y[127];
2782                         std::deque<std::string> stackresult;
2783                         std::string x;
2784
2785                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2786                         {
2787                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2788                                 if (modesequence.length())
2789                                 {
2790                                         Instance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2791                                         irc::spacesepstream sep(modesequence);
2792                                         std::string modeletters = sep.GetToken();
2793                                         Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2794
2795                                         while (!modeletters.empty())
2796                                         {
2797                                                 char mletter = *(modeletters.begin());
2798                                                 modestack.Push(mletter,sep.GetToken());
2799                                                 Instance->Log(DEBUG,"Push letter = '%c'",mletter);
2800                                                 modeletters.erase(modeletters.begin());
2801                                                 Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2802                                         }
2803                                 }
2804                         }
2805
2806                         while (modestack.GetStackedLine(stackresult))
2807                         {
2808                                 Instance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2809                                 stackresult.push_front(ConvToStr(c->age));
2810                                 stackresult.push_front(c->name);
2811                                 Utils->DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2812                                 stackresult.erase(stackresult.begin() + 1);
2813                                 Instance->Log(DEBUG,"Stacked items:");
2814                                 for (size_t z = 0; z < stackresult.size(); z++)
2815                                 {
2816                                         y[z] = stackresult[z].c_str();
2817                                         Instance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2818                                 }
2819                                 userrec* n = new userrec(Instance);
2820                                 n->SetFd(FD_MAGIC_NUMBER);
2821                                 Instance->SendMode(y, stackresult.size(), n);
2822                                 delete n;
2823                         }
2824                 }
2825                 return true;
2826         }
2827
2828         bool RemoteServer(const std::string &prefix, std::deque<std::string> &params)
2829         {
2830                 if (params.size() < 4)
2831                         return false;
2832
2833                 std::string servername = params[0];
2834                 std::string password = params[1];
2835                 // hopcount is not used for a remote server, we calculate this ourselves
2836                 std::string description = params[3];
2837                 TreeServer* ParentOfThis = Utils->FindServer(prefix);
2838
2839                 if (!ParentOfThis)
2840                 {
2841                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2842                         return false;
2843                 }
2844                 TreeServer* CheckDupe = Utils->FindServer(servername);
2845                 if (CheckDupe)
2846                 {
2847                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2848                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2849                         return false;
2850                 }
2851                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL);
2852                 ParentOfThis->AddChild(Node);
2853                 params[3] = ":" + params[3];
2854                 Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
2855                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2856                 return true;
2857         }
2858
2859         bool Outbound_Reply_Server(std::deque<std::string> &params)
2860         {
2861                 if (params.size() < 4)
2862                         return false;
2863
2864                 irc::string servername = params[0].c_str();
2865                 std::string sname = params[0];
2866                 std::string password = params[1];
2867                 int hops = atoi(params[2].c_str());
2868
2869                 if (hops)
2870                 {
2871                         this->WriteLine("ERROR :Server too far away for authentication");
2872                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2873                         return false;
2874                 }
2875                 std::string description = params[3];
2876                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2877                 {
2878                         if ((x->Name == servername) && (x->RecvPass == password))
2879                         {
2880                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2881                                 if (CheckDupe)
2882                                 {
2883                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2884                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2885                                         return false;
2886                                 }
2887                                 // Begin the sync here. this kickstarts the
2888                                 // other side, waiting in WAIT_AUTH_2 state,
2889                                 // into starting their burst, as it shows
2890                                 // that we're happy.
2891                                 this->LinkState = CONNECTED;
2892                                 // we should add the details of this server now
2893                                 // to the servers tree, as a child of the root
2894                                 // node.
2895                                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this);
2896                                 Utils->TreeRoot->AddChild(Node);
2897                                 params[3] = ":" + params[3];
2898                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
2899                                 this->bursting = true;
2900                                 this->DoBurst(Node);
2901                                 return true;
2902                         }
2903                 }
2904                 this->WriteLine("ERROR :Invalid credentials");
2905                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2906                 return false;
2907         }
2908
2909         bool Inbound_Server(std::deque<std::string> &params)
2910         {
2911                 if (params.size() < 4)
2912                         return false;
2913
2914                 irc::string servername = params[0].c_str();
2915                 std::string sname = params[0];
2916                 std::string password = params[1];
2917                 int hops = atoi(params[2].c_str());
2918
2919                 if (hops)
2920                 {
2921                         this->WriteLine("ERROR :Server too far away for authentication");
2922                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2923                         return false;
2924                 }
2925                 std::string description = params[3];
2926                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2927                 {
2928                         if ((x->Name == servername) && (x->RecvPass == password))
2929                         {
2930                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2931                                 if (CheckDupe)
2932                                 {
2933                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2934                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2935                                         return false;
2936                                 }
2937                                 /* If the config says this link is encrypted, but the remote side
2938                                  * hasnt bothered to send the AES command before SERVER, then we
2939                                  * boot them off as we MUST have this connection encrypted.
2940                                  */
2941                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2942                                 {
2943                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2944                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2945                                         return false;
2946                                 }
2947                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2948                                 this->InboundServerName = sname;
2949                                 this->InboundDescription = description;
2950                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2951                                 // along with the sendpass from this block.
2952                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2953                                 // move to the next state, we are now waiting for THEM.
2954                                 this->LinkState = WAIT_AUTH_2;
2955                                 return true;
2956                         }
2957                 }
2958                 this->WriteLine("ERROR :Invalid credentials");
2959                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2960                 return false;
2961         }
2962
2963         void Split(const std::string &line, std::deque<std::string> &n)
2964         {
2965                 n.clear();
2966                 irc::tokenstream tokens(line);
2967                 std::string param;
2968                 while ((param = tokens.GetToken()) != "")
2969                         n.push_back(param);
2970                 return;
2971         }
2972
2973         bool ProcessLine(std::string &line)
2974         {
2975                 std::deque<std::string> params;
2976                 irc::string command;
2977                 std::string prefix;
2978
2979                 if (line.empty())
2980                         return true;
2981
2982                 line = line.substr(0, line.find_first_of("\r\n"));
2983
2984                 Instance->Log(DEBUG,"IN: %s", line.c_str());
2985
2986                 this->Split(line.c_str(),params);
2987
2988                 if ((params[0][0] == ':') && (params.size() > 1))
2989                 {
2990                         prefix = params[0].substr(1);
2991                         params.pop_front();
2992                 }
2993
2994                 command = params[0].c_str();
2995                 params.pop_front();
2996
2997                 if ((!this->ctx_in) && (command == "AES"))
2998                 {
2999                         std::string sserv = params[0];
3000                         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
3001                         {
3002                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
3003                                 {
3004                                         this->InitAES(x->EncryptionKey,sserv);
3005                                 }
3006                         }
3007
3008                         return true;
3009                 }
3010                 else if ((this->ctx_in) && (command == "AES"))
3011                 {
3012                         this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Encryption already enabled on this connection yet %s is trying to enable it twice!",params[0].c_str());
3013                 }
3014
3015                 switch (this->LinkState)
3016                 {
3017                         TreeServer* Node;
3018
3019                         case WAIT_AUTH_1:
3020                                 // Waiting for SERVER command from remote server. Server initiating
3021                                 // the connection sends the first SERVER command, listening server
3022                                 // replies with theirs if its happy, then if the initiator is happy,
3023                                 // it starts to send its net sync, which starts the merge, otherwise
3024                                 // it sends an ERROR.
3025                                 if (command == "PASS")
3026                                 {
3027                                         /* Silently ignored */
3028                                 }
3029                                 else if (command == "SERVER")
3030                                 {
3031                                         return this->Inbound_Server(params);
3032                                 }
3033                                 else if (command == "ERROR")
3034                                 {
3035                                         return this->Error(params);
3036                                 }
3037                                 else if (command == "USER")
3038                                 {
3039                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
3040                                         return false;
3041                                 }
3042                                 else if (command == "CAPAB")
3043                                 {
3044                                         return this->Capab(params);
3045                                 }
3046                                 else if ((command == "U") || (command == "S"))
3047                                 {
3048                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3049                                         return false;
3050                                 }
3051                                 else
3052                                 {
3053                                         std::string error("ERROR :Invalid command in negotiation phase: ");
3054                                         error.append(command.c_str());
3055                                         this->WriteLine(error);
3056                                         return false;
3057                                 }
3058                         break;
3059                         case WAIT_AUTH_2:
3060                                 // Waiting for start of other side's netmerge to say they liked our
3061                                 // password.
3062                                 if (command == "SERVER")
3063                                 {
3064                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
3065                                         // silently ignore.
3066                                         return true;
3067                                 }
3068                                 else if ((command == "U") || (command == "S"))
3069                                 {
3070                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3071                                         return false;
3072                                 }
3073                                 else if (command == "BURST")
3074                                 {
3075                                         if (params.size())
3076                                         {
3077                                                 /* If a time stamp is provided, try and check syncronization */
3078                                                 time_t THEM = atoi(params[0].c_str());
3079                                                 long delta = THEM-time(NULL);
3080                                                 if ((delta < -600) || (delta > 600))
3081                                                 {
3082                                                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Your clocks are out by %d seconds (this is more than ten minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs(delta));
3083                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
3084                                                         return false;
3085                                                 }
3086                                                 else if ((delta < -60) || (delta > 60))
3087                                                 {
3088                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
3089                                                 }
3090                                         }
3091                                         this->LinkState = CONNECTED;
3092                                         Node = new TreeServer(this->Utils,this->Instance,InboundServerName,InboundDescription,Utils->TreeRoot,this);
3093                                         Utils->TreeRoot->AddChild(Node);
3094                                         params.clear();
3095                                         params.push_back(InboundServerName);
3096                                         params.push_back("*");
3097                                         params.push_back("1");
3098                                         params.push_back(":"+InboundDescription);
3099                                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
3100                                         this->bursting = true;
3101                                         this->DoBurst(Node);
3102                                 }
3103                                 else if (command == "ERROR")
3104                                 {
3105                                         return this->Error(params);
3106                                 }
3107                                 else if (command == "CAPAB")
3108                                 {
3109                                         return this->Capab(params);
3110                                 }
3111
3112                         break;
3113                         case LISTENER:
3114                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
3115                                 return false;
3116                         break;
3117                         case CONNECTING:
3118                                 if (command == "SERVER")
3119                                 {
3120                                         // another server we connected to, which was in WAIT_AUTH_1 state,
3121                                         // has just sent us their credentials. If we get this far, theyre
3122                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
3123                                         // if we're happy with this, we should send our netburst which
3124                                         // kickstarts the merge.
3125                                         return this->Outbound_Reply_Server(params);
3126                                 }
3127                                 else if (command == "ERROR")
3128                                 {
3129                                         return this->Error(params);
3130                                 }
3131                         break;
3132                         case CONNECTED:
3133                                 // This is the 'authenticated' state, when all passwords
3134                                 // have been exchanged and anything past this point is taken
3135                                 // as gospel.
3136
3137                                 if (prefix != "")
3138                                 {
3139                                         std::string direction = prefix;
3140                                         userrec* t = this->Instance->FindNick(prefix);
3141                                         if (t)
3142                                         {
3143                                                 direction = t->server;
3144                                         }
3145                                         TreeServer* route_back_again = Utils->BestRouteTo(direction);
3146                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3147                                         {
3148                                                 if (route_back_again)
3149                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3150                                                 return true;
3151                                         }
3152
3153                                         /* Fix by brain:
3154                                          * When there is activity on the socket, reset the ping counter so
3155                                          * that we're not wasting bandwidth pinging an active server.
3156                                          */
3157                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3158                                         route_back_again->SetPingFlag();
3159                                 }
3160
3161                                 if (command == "SVSMODE")
3162                                 {
3163                                         /* Services expects us to implement
3164                                          * SVSMODE. In inspircd its the same as
3165                                          * MODE anyway.
3166                                          */
3167                                         command = "MODE";
3168                                 }
3169                                 std::string target = "";
3170                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3171                                  * working with std::string here.
3172                                  */
3173                                 if ((command == "NICK") && (params.size() > 1))
3174                                 {
3175                                         return this->IntroduceClient(prefix,params);
3176                                 }
3177                                 else if (command == "FJOIN")
3178                                 {
3179                                         return this->ForceJoin(prefix,params);
3180                                 }
3181                                 else if (command == "STATS")
3182                                 {
3183                                         return this->Stats(prefix, params);
3184                                 }
3185                                 else if (command == "MOTD")
3186                                 {
3187                                         return this->Motd(prefix, params);
3188                                 }
3189                                 else if (command == "ADMIN")
3190                                 {
3191                                         return this->Admin(prefix, params);
3192                                 }
3193                                 else if (command == "SERVER")
3194                                 {
3195                                         return this->RemoteServer(prefix,params);
3196                                 }
3197                                 else if (command == "ERROR")
3198                                 {
3199                                         return this->Error(params);
3200                                 }
3201                                 else if (command == "OPERTYPE")
3202                                 {
3203                                         return this->OperType(prefix,params);
3204                                 }
3205                                 else if (command == "FMODE")
3206                                 {
3207                                         return this->ForceMode(prefix,params);
3208                                 }
3209                                 else if (command == "KILL")
3210                                 {
3211                                         return this->RemoteKill(prefix,params);
3212                                 }
3213                                 else if (command == "FTOPIC")
3214                                 {
3215                                         return this->ForceTopic(prefix,params);
3216                                 }
3217                                 else if (command == "REHASH")
3218                                 {
3219                                         return this->RemoteRehash(prefix,params);
3220                                 }
3221                                 else if (command == "METADATA")
3222                                 {
3223                                         return this->MetaData(prefix,params);
3224                                 }
3225                                 else if (command == "REMSTATUS")
3226                                 {
3227                                         return this->RemoveStatus(prefix,params);
3228                                 }
3229                                 else if (command == "PING")
3230                                 {
3231                                         /*
3232                                          * We just got a ping from a server that's bursting.
3233                                          * This can't be right, so set them to not bursting, and
3234                                          * apply their lines.
3235                                          */
3236                                         if (this->bursting)
3237                                         {
3238                                                 this->bursting = false;
3239                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3240                                         }
3241                                         if (prefix == "")
3242                                         {
3243                                                 prefix = this->GetName();
3244                                         }
3245                                         return this->LocalPing(prefix,params);
3246                                 }
3247                                 else if (command == "PONG")
3248                                 {
3249                                         /*
3250                                          * We just got a pong from a server that's bursting.
3251                                          * This can't be right, so set them to not bursting, and
3252                                          * apply their lines.
3253                                          */
3254                                         if (this->bursting)
3255                                         {
3256                                                 this->bursting = false;
3257                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3258                                         }
3259                                         if (prefix == "")
3260                                         {
3261                                                 prefix = this->GetName();
3262                                         }
3263                                         return this->LocalPong(prefix,params);
3264                                 }
3265                                 else if (command == "VERSION")
3266                                 {
3267                                         return this->ServerVersion(prefix,params);
3268                                 }
3269                                 else if (command == "FHOST")
3270                                 {
3271                                         return this->ChangeHost(prefix,params);
3272                                 }
3273                                 else if (command == "FNAME")
3274                                 {
3275                                         return this->ChangeName(prefix,params);
3276                                 }
3277                                 else if (command == "ADDLINE")
3278                                 {
3279                                         return this->AddLine(prefix,params);
3280                                 }
3281                                 else if (command == "SVSNICK")
3282                                 {
3283                                         if (prefix == "")
3284                                         {
3285                                                 prefix = this->GetName();
3286                                         }
3287                                         return this->ForceNick(prefix,params);
3288                                 }
3289                                 else if (command == "IDLE")
3290                                 {
3291                                         return this->Whois(prefix,params);
3292                                 }
3293                                 else if (command == "PUSH")
3294                                 {
3295                                         return this->Push(prefix,params);
3296                                 }
3297                                 else if (command == "TIME")
3298                                 {
3299                                         return this->Time(prefix,params);
3300                                 }
3301                                 else if ((command == "KICK") && (Utils->IsServer(prefix)))
3302                                 {
3303                                         std::string sourceserv = this->myhost;
3304                                         if (params.size() == 3)
3305                                         {
3306                                                 userrec* user = this->Instance->FindNick(params[1]);
3307                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3308                                                 if (user && chan)
3309                                                 {
3310                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3311                                                                 /* Yikes, the channels gone! */
3312                                                                 delete chan;
3313                                                 }
3314                                         }
3315                                         if (this->InboundServerName != "")
3316                                         {
3317                                                 sourceserv = this->InboundServerName;
3318                                         }
3319                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3320                                 }
3321                                 else if (command == "SVSJOIN")
3322                                 {
3323                                         if (prefix == "")
3324                                         {
3325                                                 prefix = this->GetName();
3326                                         }
3327                                         return this->ServiceJoin(prefix,params);
3328                                 }
3329                                 else if (command == "SQUIT")
3330                                 {
3331                                         if (params.size() == 2)
3332                                         {
3333                                                 this->Squit(Utils->FindServer(params[0]),params[1]);
3334                                         }
3335                                         return true;
3336                                 }
3337                                 else if (command == "ENDBURST")
3338                                 {
3339                                         this->bursting = false;
3340                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3341                                         std::string sourceserv = this->myhost;
3342                                         if (this->InboundServerName != "")
3343                                         {
3344                                                 sourceserv = this->InboundServerName;
3345                                         }
3346                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3347                                         return true;
3348                                 }
3349                                 else
3350                                 {
3351                                         // not a special inter-server command.
3352                                         // Emulate the actual user doing the command,
3353                                         // this saves us having a huge ugly parser.
3354                                         userrec* who = this->Instance->FindNick(prefix);
3355                                         std::string sourceserv = this->myhost;
3356                                         if (this->InboundServerName != "")
3357                                         {
3358                                                 sourceserv = this->InboundServerName;
3359                                         }
3360                                         if (who)
3361                                         {
3362                                                 if ((command == "NICK") && (params.size() > 0))
3363                                                 {
3364                                                         /* On nick messages, check that the nick doesnt
3365                                                          * already exist here. If it does, kill their copy,
3366                                                          * and our copy.
3367                                                          */
3368                                                         userrec* x = this->Instance->FindNick(params[0]);
3369                                                         if ((x) && (x != who))
3370                                                         {
3371                                                                 std::deque<std::string> p;
3372                                                                 p.push_back(params[0]);
3373                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3374                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3375                                                                 p.clear();
3376                                                                 p.push_back(prefix);
3377                                                                 p.push_back("Nickname collision");
3378                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3379                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3380                                                                 userrec* y = this->Instance->FindNick(prefix);
3381                                                                 if (y)
3382                                                                 {
3383                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3384                                                                 }
3385                                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3386                                                         }
3387                                                 }
3388                                                 // its a user
3389                                                 target = who->server;
3390                                                 const char* strparams[127];
3391                                                 for (unsigned int q = 0; q < params.size(); q++)
3392                                                 {
3393                                                         strparams[q] = params[q].c_str();
3394                                                 }
3395                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3396                                                 {
3397                                                         case CMD_INVALID:
3398                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3399                                                                 return false;
3400                                                         break;
3401                                                         case CMD_FAILURE:
3402                                                                 return true;
3403                                                         break;
3404                                                         default:
3405                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3406                                                         break;
3407                                                 }
3408                                         }
3409                                         else
3410                                         {
3411                                                 // its not a user. Its either a server, or somethings screwed up.
3412                                                 if (Utils->IsServer(prefix))
3413                                                 {
3414                                                         target = this->Instance->Config->ServerName;
3415                                                 }
3416                                                 else
3417                                                 {
3418                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3419                                                         return true;
3420                                                 }
3421                                         }
3422                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3423
3424                                 }
3425                                 return true;
3426                         break;
3427                 }
3428                 return true;
3429         }
3430
3431         virtual std::string GetName()
3432         {
3433                 std::string sourceserv = this->myhost;
3434                 if (this->InboundServerName != "")
3435                 {
3436                         sourceserv = this->InboundServerName;
3437                 }
3438                 return sourceserv;
3439         }
3440
3441         virtual void OnTimeout()
3442         {
3443                 if (this->LinkState == CONNECTING)
3444                 {
3445                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3446                         Link* MyLink = Utils->FindLink(myhost);
3447                         if (MyLink)
3448                                 Utils->DoFailOver(MyLink);
3449                 }
3450         }
3451
3452         virtual void OnClose()
3453         {
3454                 // Connection closed.
3455                 // If the connection is fully up (state CONNECTED)
3456                 // then propogate a netsplit to all peers.
3457                 std::string quitserver = this->myhost;
3458                 if (this->InboundServerName != "")
3459                 {
3460                         quitserver = this->InboundServerName;
3461                 }
3462                 TreeServer* s = Utils->FindServer(quitserver);
3463                 if (s)
3464                 {
3465                         Squit(s,"Remote host closed the connection");
3466                 }
3467                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3468         }
3469
3470         virtual int OnIncomingConnection(int newsock, char* ip)
3471         {
3472                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3473                  * or discovering if this port is the server port, we don't allow connections from any
3474                  * IPs for which we don't have a link block.
3475                  */
3476                 bool found = false;
3477
3478                 found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
3479                 if (!found)
3480                 {
3481                         for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
3482                                 if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
3483                                         found = true;
3484
3485                         if (!found)
3486                         {
3487                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3488                                 close(newsock);
3489                                 return false;
3490                         }
3491                 }
3492                 TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip);
3493                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3494                 return true;
3495         }
3496 };
3497
3498 /** This class is used to resolve server hostnames during /connect and autoconnect.
3499  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3500  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3501  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3502  * will have an IP address which we can then use to continue our connection.
3503  */
3504 class ServernameResolver : public Resolver
3505 {
3506  private:
3507         /** A copy of the Link tag info for what we're connecting to.
3508          * We take a copy, rather than using a pointer, just in case the
3509          * admin takes the tag away and rehashes while the domain is resolving.
3510          */
3511         Link MyLink;
3512         SpanningTreeUtilities* Utils;
3513  public:
3514         ServernameResolver(SpanningTreeUtilities* Util, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x), Utils(Util)
3515         {
3516                 /* Nothing in here, folks */
3517         }
3518
3519         void OnLookupComplete(const std::string &result)
3520         {
3521                 /* Initiate the connection, now that we have an IP to use.
3522                  * Passing a hostname directly to InspSocket causes it to
3523                  * just bail and set its FD to -1.
3524                  */
3525                 TreeServer* CheckDupe = Utils->FindServer(MyLink.Name.c_str());
3526                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3527                 {
3528                         TreeSocket* newsocket = new TreeSocket(this->Utils, ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3529                         if (newsocket->GetFd() > -1)
3530                         {
3531                                 /* We're all OK */
3532                         }
3533                         else
3534                         {
3535                                 /* Something barfed, show the opers */
3536                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3537                                 delete newsocket;
3538                                 Utils->DoFailOver(&MyLink);
3539                         }
3540                 }
3541         }
3542
3543         void OnError(ResolverError e, const std::string &errormessage)
3544         {
3545                 /* Ooops! */
3546                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3547                 Utils->DoFailOver(&MyLink);
3548         }
3549 };
3550
3551 /** Handle resolving of server IPs for the cache
3552  */
3553 class SecurityIPResolver : public Resolver
3554 {
3555  private:
3556         Link MyLink;
3557         SpanningTreeUtilities* Utils;
3558  public:
3559         SecurityIPResolver(SpanningTreeUtilities* U, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x), Utils(U)
3560         {
3561         }
3562
3563         void OnLookupComplete(const std::string &result)
3564         {
3565                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3566                 Utils->ValidIPs.push_back(result);
3567         }
3568
3569         void OnError(ResolverError e, const std::string &errormessage)
3570         {
3571                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3572         }
3573 };
3574
3575 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
3576 {
3577         Bindings.clear();
3578         this->ReadConfiguration(true);
3579         this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3580 }
3581
3582 SpanningTreeUtilities::~SpanningTreeUtilities()
3583 {
3584         for (unsigned int i = 0; i < Bindings.size(); i++)
3585         {
3586                 ServerInstance->Log(DEBUG,"Freeing binding %d of %d",i, Bindings.size());
3587                 ServerInstance->SE->DelFd(Bindings[i]);
3588                 Bindings[i]->Close();
3589                 DELETE(Bindings[i]);
3590         }
3591         ServerInstance->Log(DEBUG,"Freeing connected servers...");
3592         while (TreeRoot->ChildCount())
3593         {
3594                 TreeServer* child_server = TreeRoot->GetChild(0);
3595                 ServerInstance->Log(DEBUG,"Freeing connected server %s", child_server->GetName().c_str());
3596                 if (child_server)
3597                 {
3598                         TreeSocket* sock = child_server->GetSocket();
3599                         ServerInstance->SE->DelFd(sock);
3600                         sock->Close();
3601                         DELETE(sock);
3602                 }
3603         }
3604         delete TreeRoot;
3605 }
3606
3607 void SpanningTreeUtilities::AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3608 {
3609         for (unsigned int c = 0; c < list.size(); c++)
3610         {
3611                 if (list[c] == server)
3612                 {
3613                         return;
3614                 }
3615         }
3616         list.push_back(server);
3617 }
3618
3619 /** returns a list of DIRECT servernames for a specific channel */
3620 void SpanningTreeUtilities::GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3621 {
3622         CUList *ulist = c->GetUsers();
3623         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3624         {
3625                 if (i->second->GetFd() < 0)
3626                 {
3627                         TreeServer* best = this->BestRouteTo(i->second->server);
3628                         if (best)
3629                                 AddThisServer(best,list);
3630                 }
3631         }
3632         return;
3633 }
3634
3635 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params)
3636 {
3637         TreeServer* omitroute = this->BestRouteTo(omit);
3638         if ((command == "NOTICE") || (command == "PRIVMSG"))
3639         {
3640                 if (params.size() >= 2)
3641                 {
3642                         /* Prefixes */
3643                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3644                         {
3645                                 params[0] = params[0].substr(1, params[0].length()-1);
3646                         }
3647                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3648                         {
3649                                 // special routing for private messages/notices
3650                                 userrec* d = ServerInstance->FindNick(params[0]);
3651                                 if (d)
3652                                 {
3653                                         std::deque<std::string> par;
3654                                         par.push_back(params[0]);
3655                                         par.push_back(":"+params[1]);
3656                                         this->DoOneToOne(prefix,command.c_str(),par,d->server);
3657                                         return true;
3658                                 }
3659                         }
3660                         else if (*(params[0].c_str()) == '$')
3661                         {
3662                                 std::deque<std::string> par;
3663                                 par.push_back(params[0]);
3664                                 par.push_back(":"+params[1]);
3665                                 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3666                                 return true;
3667                         }
3668                         else
3669                         {
3670                                 chanrec* c = ServerInstance->FindChan(params[0]);
3671                                 if (c)
3672                                 {
3673                                         std::deque<TreeServer*> list;
3674                                         GetListOfServersForChannel(c,list);
3675                                         unsigned int lsize = list.size();
3676                                         for (unsigned int i = 0; i < lsize; i++)
3677                                         {
3678                                                 TreeSocket* Sock = list[i]->GetSocket();
3679                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3680                                                 {
3681                                                         Sock->WriteLine(data);
3682                                                 }
3683                                         }
3684                                         return true;
3685                                 }
3686                         }
3687                 }
3688         }
3689         unsigned int items =this->TreeRoot->ChildCount();
3690         for (unsigned int x = 0; x < items; x++)
3691         {
3692                 TreeServer* Route = this->TreeRoot->GetChild(x);
3693                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3694                 {
3695                         TreeSocket* Sock = Route->GetSocket();
3696                         if (Sock)
3697                                 Sock->WriteLine(data);
3698                 }
3699         }
3700         return true;
3701 }
3702
3703 bool SpanningTreeUtilities::DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit)
3704 {
3705         TreeServer* omitroute = this->BestRouteTo(omit);
3706         std::string FullLine = ":" + prefix + " " + command;
3707         unsigned int words = params.size();
3708         for (unsigned int x = 0; x < words; x++)
3709         {
3710                 FullLine = FullLine + " " + params[x];
3711         }
3712         unsigned int items = this->TreeRoot->ChildCount();
3713         for (unsigned int x = 0; x < items; x++)
3714         {
3715                 TreeServer* Route = this->TreeRoot->GetChild(x);
3716                 // Send the line IF:
3717                 // The route has a socket (its a direct connection)
3718                 // The route isnt the one to be omitted
3719                 // The route isnt the path to the one to be omitted
3720                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3721                 {
3722                         TreeSocket* Sock = Route->GetSocket();
3723                         if (Sock)
3724                                 Sock->WriteLine(FullLine);
3725                 }
3726         }
3727         return true;
3728 }
3729
3730 bool SpanningTreeUtilities::DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params)
3731 {
3732         std::string FullLine = ":" + prefix + " " + command;
3733         unsigned int words = params.size();
3734         for (unsigned int x = 0; x < words; x++)
3735         {
3736                 FullLine = FullLine + " " + params[x];
3737         }
3738         unsigned int items = this->TreeRoot->ChildCount();
3739         for (unsigned int x = 0; x < items; x++)
3740         {
3741                 TreeServer* Route = this->TreeRoot->GetChild(x);
3742                 if (Route && Route->GetSocket())
3743                 {
3744                         TreeSocket* Sock = Route->GetSocket();
3745                         if (Sock)
3746                                 Sock->WriteLine(FullLine);
3747                 }
3748         }
3749         return true;
3750 }
3751
3752 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3753 {
3754         std::string spfx = prefix;
3755         std::string scmd = command;
3756         return this->DoOneToMany(spfx, scmd, params);
3757 }
3758
3759 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3760 {
3761         std::string spfx = prefix;
3762         std::string scmd = command;
3763         return this->DoOneToAllButSender(spfx, scmd, params, omit);
3764 }
3765
3766 bool SpanningTreeUtilities::DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target)
3767 {
3768         TreeServer* Route = this->BestRouteTo(target);
3769         if (Route)
3770         {
3771                 std::string FullLine = ":" + prefix + " " + command;
3772                 unsigned int words = params.size();
3773                 for (unsigned int x = 0; x < words; x++)
3774                 {
3775                         FullLine = FullLine + " " + params[x];
3776                 }
3777                 if (Route && Route->GetSocket())
3778                 {
3779                         TreeSocket* Sock = Route->GetSocket();
3780                         if (Sock)
3781                                 Sock->WriteLine(FullLine);
3782                 }
3783                 return true;
3784         }
3785         else
3786         {
3787                 return false;
3788         }
3789 }
3790
3791 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
3792 {
3793         ConfigReader* Conf = new ConfigReader(ServerInstance);
3794         if (rebind)
3795         {
3796                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3797                 {
3798                         std::string Type = Conf->ReadValue("bind","type",j);
3799                         std::string IP = Conf->ReadValue("bind","address",j);
3800                         int Port = Conf->ReadInteger("bind","port",j,true);
3801                         if (Type == "servers")
3802                         {
3803                                 ServerInstance->Log(DEBUG,"m_spanningtree: Binding server port %s:%d", IP.c_str(), Port);
3804                                 if (IP == "*")
3805                                 {
3806                                         IP = "";
3807                                 }
3808                                 TreeSocket* listener = new TreeSocket(this, ServerInstance, IP.c_str(),Port,true,10);
3809                                 if (listener->GetState() == I_LISTENING)
3810                                 {
3811                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), Port);
3812                                         Bindings.push_back(listener);
3813                                 }
3814                                 else
3815                                 {
3816                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3817                                         listener->Close();
3818                                         DELETE(listener);
3819                                 }
3820                                 ServerInstance->Log(DEBUG,"Done with this binding");
3821                         }
3822                 }
3823         }
3824         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3825         HideULines = Conf->ReadFlag("options","hideulines",0);
3826         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
3827         LinkBlocks.clear();
3828         ValidIPs.clear();
3829         for (int j =0; j < Conf->Enumerate("link"); j++)
3830         {
3831                 Link L;
3832                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3833                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3834                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3835                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3836                 L.Port = Conf->ReadInteger("link","port",j,true);
3837                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3838                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3839                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3840                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3841                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3842                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3843                 /* Bugfix by brain, do not allow people to enter bad configurations */
3844                 if (L.Name != ServerInstance->Config->ServerName)
3845                 {
3846                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3847                         {
3848                                 ValidIPs.push_back(L.IPAddr);
3849
3850                                 if (Allow.length())
3851                                         ValidIPs.push_back(Allow);
3852
3853                                 /* Needs resolving */
3854                                 insp_inaddr binip;
3855                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3856                                 {
3857                                         try
3858                                         {
3859                                                 SecurityIPResolver* sr = new SecurityIPResolver(this, ServerInstance, L.IPAddr, L);
3860                                                 ServerInstance->AddResolver(sr);
3861                                         }
3862                                         catch (ModuleException& e)
3863                                         {
3864                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3865                                         }
3866                                 }
3867
3868                                 LinkBlocks.push_back(L);
3869                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3870                         }
3871                         else
3872                         {
3873                                 if (L.IPAddr == "")
3874                                 {
3875                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3876                                 }
3877                                 else if (L.RecvPass == "")
3878                                 {
3879                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3880                                 }
3881                                 else if (L.SendPass == "")
3882                                 {
3883                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3884                                 }
3885                                 else if (L.Name == "")
3886                                 {
3887                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3888                                 }
3889                                 else if (!L.Port)
3890                                 {
3891                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3892                                 }
3893                         }
3894                 }
3895                 else
3896                 {
3897                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3898                 }
3899         }
3900         DELETE(Conf);
3901 }
3902
3903
3904
3905 class ModuleSpanningTree : public Module
3906 {
3907         int line;
3908         int NumServers;
3909         unsigned int max_local;
3910         unsigned int max_global;
3911         cmd_rconnect* command_rconnect;
3912         SpanningTreeUtilities* Utils;
3913
3914  public:
3915
3916         ModuleSpanningTree(InspIRCd* Me)
3917                 : Module::Module(Me), max_local(0), max_global(0)
3918         {
3919                 Utils = new SpanningTreeUtilities(Me, this);
3920
3921                 command_rconnect = new cmd_rconnect(ServerInstance, this, Utils);
3922                 ServerInstance->AddCommand(command_rconnect);
3923         }
3924
3925         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3926         {
3927                 std::string Parent = Utils->TreeRoot->GetName();
3928                 if (Current->GetParent())
3929                 {
3930                         Parent = Current->GetParent()->GetName();
3931                 }
3932                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3933                 {
3934                         if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3935                         {
3936                                 if (*user->oper)
3937                                 {
3938                                          ShowLinks(Current->GetChild(q),user,hops+1);
3939                                 }
3940                         }
3941                         else
3942                         {
3943                                 ShowLinks(Current->GetChild(q),user,hops+1);
3944                         }
3945                 }
3946                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3947                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3948                         return;
3949                 user->WriteServ("364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),(Utils->FlatLinks && (!*user->oper)) ? ServerInstance->Config->ServerName : Parent.c_str(),(Utils->FlatLinks && (!*user->oper)) ? 0 : hops,Current->GetDesc().c_str());
3950         }
3951
3952         int CountLocalServs()
3953         {
3954                 return Utils->TreeRoot->ChildCount();
3955         }
3956
3957         int CountServs()
3958         {
3959                 return Utils->serverlist.size();
3960         }
3961
3962         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3963         {
3964                 ShowLinks(Utils->TreeRoot,user,0);
3965                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3966                 return;
3967         }
3968
3969         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3970         {
3971                 unsigned int n_users = ServerInstance->UserCount();
3972
3973                 /* Only update these when someone wants to see them, more efficient */
3974                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3975                         max_local = ServerInstance->LocalUserCount();
3976                 if (n_users > max_global)
3977                         max_global = n_users;
3978
3979                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3980                 if (ServerInstance->OperCount())
3981                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3982                 if (ServerInstance->UnregisteredUserCount())
3983                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3984                 if (ServerInstance->ChannelCount())
3985                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3986                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3987                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3988                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3989                 return;
3990         }
3991
3992         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3993
3994         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3995         {
3996                 if (line < 128)
3997                 {
3998                         for (int t = 0; t < depth; t++)
3999                         {
4000                                 matrix[line][t] = ' ';
4001                         }
4002
4003                         // For Aligning, we need to work out exactly how deep this thing is, and produce
4004                         // a 'Spacer' String to compensate.
4005                         char spacer[40];
4006
4007                         memset(spacer,' ',40);
4008                         if ((40 - Current->GetName().length() - depth) > 1) {
4009                                 spacer[40 - Current->GetName().length() - depth] = '\0';
4010                         }
4011                         else
4012                         {
4013                                 spacer[5] = '\0';
4014                         }
4015
4016                         float percent;
4017                         char text[80];
4018                         if (ServerInstance->clientlist.size() == 0) {
4019                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
4020                                 percent = 0;
4021                         }
4022                         else
4023                         {
4024                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
4025                         }
4026                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
4027                         totusers += Current->GetUserCount();
4028                         totservers++;
4029                         strlcpy(&matrix[line][depth],text,80);
4030                         line++;
4031                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
4032                         {
4033                                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
4034                                 {
4035                                         if (*user->oper)
4036                                         {
4037                                                 ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4038                                         }
4039                                 }
4040                                 else
4041                                 {
4042                                         ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4043                                 }
4044                         }
4045                 }
4046         }
4047
4048         int HandleMotd(const char** parameters, int pcnt, userrec* user)
4049         {
4050                 if (pcnt > 0)
4051                 {
4052                         /* Remote MOTD, the server is within the 1st parameter */
4053                         std::deque<std::string> params;
4054                         params.push_back(parameters[0]);
4055
4056                         /* Send it out remotely, generate no reply yet */
4057                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4058                         if (s)
4059                         {
4060                                 Utils->DoOneToOne(user->nick, "MOTD", params, s->GetName());
4061                         }
4062                         else
4063                         {
4064                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4065                         }
4066                         return 1;
4067                 }
4068                 return 0;
4069         }
4070
4071         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
4072         {
4073                 if (pcnt > 0)
4074                 {
4075                         /* Remote ADMIN, the server is within the 1st parameter */
4076                         std::deque<std::string> params;
4077                         params.push_back(parameters[0]);
4078
4079                         /* Send it out remotely, generate no reply yet */
4080                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4081                         if (s)
4082                         {
4083                                 Utils->DoOneToOne(user->nick, "ADMIN", params, s->GetName());
4084                         }
4085                         else
4086                         {
4087                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4088                         }
4089                         return 1;
4090                 }
4091                 return 0;
4092         }
4093
4094         int HandleStats(const char** parameters, int pcnt, userrec* user)
4095         {
4096                 if (pcnt > 1)
4097                 {
4098                         /* Remote STATS, the server is within the 2nd parameter */
4099                         std::deque<std::string> params;
4100                         params.push_back(parameters[0]);
4101                         params.push_back(parameters[1]);
4102                         /* Send it out remotely, generate no reply yet */
4103                         TreeServer* s = Utils->FindServerMask(parameters[1]);
4104                         if (s)
4105                         {
4106                                 params[1] = s->GetName();
4107                                 Utils->DoOneToOne(user->nick, "STATS", params, s->GetName());
4108                         }
4109                         else
4110                         {
4111                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4112                         }
4113                         return 1;
4114                 }
4115                 return 0;
4116         }
4117
4118         // Ok, prepare to be confused.
4119         // After much mulling over how to approach this, it struck me that
4120         // the 'usual' way of doing a /MAP isnt the best way. Instead of
4121         // keeping track of a ton of ascii characters, and line by line
4122         // under recursion working out where to place them using multiplications
4123         // and divisons, we instead render the map onto a backplane of characters
4124         // (a character matrix), then draw the branches as a series of "L" shapes
4125         // from the nodes. This is not only friendlier on CPU it uses less stack.
4126
4127         void HandleMap(const char** parameters, int pcnt, userrec* user)
4128         {
4129                 // This array represents a virtual screen which we will
4130                 // "scratch" draw to, as the console device of an irc
4131                 // client does not provide for a proper terminal.
4132                 float totusers = 0;
4133                 float totservers = 0;
4134                 char matrix[128][80];
4135                 for (unsigned int t = 0; t < 128; t++)
4136                 {
4137                         matrix[t][0] = '\0';
4138                 }
4139                 line = 0;
4140                 // The only recursive bit is called here.
4141                 ShowMap(Utils->TreeRoot,user,0,matrix,totusers,totservers);
4142                 // Process each line one by one. The algorithm has a limit of
4143                 // 128 servers (which is far more than a spanning tree should have
4144                 // anyway, so we're ok). This limit can be raised simply by making
4145                 // the character matrix deeper, 128 rows taking 10k of memory.
4146                 for (int l = 1; l < line; l++)
4147                 {
4148                         // scan across the line looking for the start of the
4149                         // servername (the recursive part of the algorithm has placed
4150                         // the servers at indented positions depending on what they
4151                         // are related to)
4152                         int first_nonspace = 0;
4153                         while (matrix[l][first_nonspace] == ' ')
4154                         {
4155                                 first_nonspace++;
4156                         }
4157                         first_nonspace--;
4158                         // Draw the `- (corner) section: this may be overwritten by
4159                         // another L shape passing along the same vertical pane, becoming
4160                         // a |- (branch) section instead.
4161                         matrix[l][first_nonspace] = '-';
4162                         matrix[l][first_nonspace-1] = '`';
4163                         int l2 = l - 1;
4164                         // Draw upwards until we hit the parent server, causing possibly
4165                         // other corners (`-) to become branches (|-)
4166                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
4167                         {
4168                                 matrix[l2][first_nonspace-1] = '|';
4169                                 l2--;
4170                         }
4171                 }
4172                 // dump the whole lot to the user. This is the easy bit, honest.
4173                 for (int t = 0; t < line; t++)
4174                 {
4175                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4176                 }
4177                 float avg_users = totusers / totservers;
4178                 user->WriteServ("270 %s :%.0f server%s and %.0f user%s, average %.2f users per server",user->nick,totservers,(totservers > 1 ? "s" : ""),totusers,(totusers > 1 ? "s" : ""),avg_users);
4179         user->WriteServ("007 %s :End of /MAP",user->nick);
4180                 return;
4181         }
4182
4183         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4184         {
4185                 TreeServer* s = Utils->FindServerMask(parameters[0]);
4186                 if (s)
4187                 {
4188                         if (s == Utils->TreeRoot)
4189                         {
4190                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4191                                 return 1;
4192                         }
4193                         TreeSocket* sock = s->GetSocket();
4194                         if (sock)
4195                         {
4196                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4197                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4198                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
4199                                 ServerInstance->SE->DelFd(sock);
4200                                 sock->Close();
4201                                 delete sock;
4202                         }
4203                         else
4204                         {
4205                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
4206                         }
4207                 }
4208                 else
4209                 {
4210                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4211                 }
4212                 return 1;
4213         }
4214
4215         int HandleTime(const char** parameters, int pcnt, userrec* user)
4216         {
4217                 if ((IS_LOCAL(user)) && (pcnt))
4218                 {
4219                         TreeServer* found = Utils->FindServerMask(parameters[0]);
4220                         if (found)
4221                         {
4222                                 // we dont' override for local server
4223                                 if (found == Utils->TreeRoot)
4224                                         return 0;
4225
4226                                 std::deque<std::string> params;
4227                                 params.push_back(found->GetName());
4228                                 params.push_back(user->nick);
4229                                 Utils->DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4230                         }
4231                         else
4232                         {
4233                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4234                         }
4235                 }
4236                 return 1;
4237         }
4238
4239         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4240         {
4241                 if ((IS_LOCAL(user)) && (pcnt > 1))
4242                 {
4243                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4244                         if ((remote) && (remote->GetFd() < 0))
4245                         {
4246                                 std::deque<std::string> params;
4247                                 params.push_back(parameters[1]);
4248                                 Utils->DoOneToOne(user->nick,"IDLE",params,remote->server);
4249                                 return 1;
4250                         }
4251                         else if (!remote)
4252                         {
4253                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4254                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4255                                 return 1;
4256                         }
4257                 }
4258                 return 0;
4259         }
4260
4261         void DoPingChecks(time_t curtime)
4262         {
4263                 for (unsigned int j = 0; j < Utils->TreeRoot->ChildCount(); j++)
4264                 {
4265                         TreeServer* serv = Utils->TreeRoot->GetChild(j);
4266                         TreeSocket* sock = serv->GetSocket();
4267                         if (sock)
4268                         {
4269                                 if (curtime >= serv->NextPingTime())
4270                                 {
4271                                         if (serv->AnsweredLastPing())
4272                                         {
4273                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4274                                                 serv->SetNextPingTime(curtime + 60);
4275                                         }
4276                                         else
4277                                         {
4278                                                 // they didnt answer, boot them
4279                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4280                                                 sock->Squit(serv,"Ping timeout");
4281                                                 ServerInstance->SE->DelFd(sock);
4282                                                 sock->Close();
4283                                                 delete sock;
4284                                                 return;
4285                                         }
4286                                 }
4287                         }
4288                 }
4289         }
4290
4291         void ConnectServer(Link* x)
4292         {
4293                 insp_inaddr binip;
4294
4295                 /* Do we already have an IP? If so, no need to resolve it. */
4296                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4297                 {
4298                         TreeSocket* newsocket = new TreeSocket(Utils, ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4299                         if (newsocket->GetFd() > -1)
4300                         {
4301                                 /* Handled automatically on success */
4302                         }
4303                         else
4304                         {
4305                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4306                                 delete newsocket;
4307                                 Utils->DoFailOver(x);
4308                         }
4309                 }
4310                 else
4311                 {
4312                         try
4313                         {
4314                                 ServernameResolver* snr = new ServernameResolver(Utils, ServerInstance,x->IPAddr, *x);
4315                                 ServerInstance->AddResolver(snr);
4316                         }
4317                         catch (ModuleException& e)
4318                         {
4319                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4320                                 Utils->DoFailOver(x);
4321                         }
4322                 }
4323         }
4324
4325         void AutoConnectServers(time_t curtime)
4326         {
4327                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4328                 {
4329                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4330                         {
4331                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4332                                 x->NextConnectTime = curtime + x->AutoConnect;
4333                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4334                                 if (x->FailOver.length())
4335                                 {
4336                                         TreeServer* CheckFailOver = Utils->FindServer(x->FailOver.c_str());
4337                                         if (CheckFailOver)
4338                                         {
4339                                                 /* The failover for this server is currently a member of the network.
4340                                                  * The failover probably succeeded, where the main link did not.
4341                                                  * Don't try the main link until the failover is gone again.
4342                                                  */
4343                                                 continue;
4344                                         }
4345                                 }
4346                                 if (!CheckDupe)
4347                                 {
4348                                         // an autoconnected server is not connected. Check if its time to connect it
4349                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4350                                         this->ConnectServer(&(*x));
4351                                 }
4352                         }
4353                 }
4354         }
4355
4356         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4357         {
4358                 // we've already checked if pcnt > 0, so this is safe
4359                 TreeServer* found = Utils->FindServerMask(parameters[0]);
4360                 if (found)
4361                 {
4362                         std::string Version = found->GetVersion();
4363                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4364                         if (found == Utils->TreeRoot)
4365                         {
4366                                 std::stringstream out(ServerInstance->Config->data005);
4367                                 std::string token = "";
4368                                 std::string line5 = "";
4369                                 int token_counter = 0;
4370
4371                                 while (!out.eof())
4372                                 {
4373                                         out >> token;
4374                                         line5 = line5 + token + " ";
4375                                         token_counter++;
4376
4377                                         if ((token_counter >= 13) || (out.eof() == true))
4378                                         {
4379                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4380                                                 line5 = "";
4381                                                 token_counter = 0;
4382                                         }
4383                                 }
4384                         }
4385                 }
4386                 else
4387                 {
4388                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4389                 }
4390                 return 1;
4391         }
4392
4393         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4394         {
4395                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4396                 {
4397                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4398                         {
4399                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4400                                 if (!CheckDupe)
4401                                 {
4402                                         user->WriteServ("NOTICE %s :*** CONNECT: Connecting to server: \002%s\002 (%s:%d)",user->nick,x->Name.c_str(),(x->HiddenFromStats ? "<hidden>" : x->IPAddr.c_str()),x->Port);
4403                                         ConnectServer(&(*x));
4404                                         return 1;
4405                                 }
4406                                 else
4407                                 {
4408                                         user->WriteServ("NOTICE %s :*** CONNECT: Server \002%s\002 already exists on the network and is connected via \002%s\002",user->nick,x->Name.c_str(),CheckDupe->GetParent()->GetName().c_str());
4409                                         return 1;
4410                                 }
4411                         }
4412                 }
4413                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4414                 return 1;
4415         }
4416
4417         virtual int OnStats(char statschar, userrec* user, string_list &results)
4418         {
4419                 if (statschar == 'c')
4420                 {
4421                         for (unsigned int i = 0; i < Utils->LinkBlocks.size(); i++)
4422                         {
4423                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 213 "+user->nick+" C *@"+(Utils->LinkBlocks[i].HiddenFromStats ? "<hidden>" : Utils->LinkBlocks[i].IPAddr)+" * "+Utils->LinkBlocks[i].Name.c_str()+" "+ConvToStr(Utils->LinkBlocks[i].Port)+" "+(Utils->LinkBlocks[i].EncryptionKey != "" ? 'e' : '-')+(Utils->LinkBlocks[i].AutoConnect ? 'a' : '-')+'s');
4424                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+Utils->LinkBlocks[i].Name.c_str());
4425                         }
4426                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4427                         ServerInstance->SNO->WriteToSnoMask('t',"Notice: %s '%c' requested by %s (%s@%s)",(!strcmp(user->server,ServerInstance->Config->ServerName) ? "Stats" : "Remote stats"),statschar,user->nick,user->ident,user->host);
4428                         return 1;
4429                 }
4430                 return 0;
4431         }
4432
4433         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4434         {
4435                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4436                 if (!validated)
4437                         return 0;
4438
4439                 if (command == "CONNECT")
4440                 {
4441                         return this->HandleConnect(parameters,pcnt,user);
4442                 }
4443                 else if (command == "STATS")
4444                 {
4445                         return this->HandleStats(parameters,pcnt,user);
4446                 }
4447                 else if (command == "MOTD")
4448                 {
4449                         return this->HandleMotd(parameters,pcnt,user);
4450                 }
4451                 else if (command == "ADMIN")
4452                 {
4453                         return this->HandleAdmin(parameters,pcnt,user);
4454                 }
4455                 else if (command == "SQUIT")
4456                 {
4457                         return this->HandleSquit(parameters,pcnt,user);
4458                 }
4459                 else if (command == "MAP")
4460                 {
4461                         this->HandleMap(parameters,pcnt,user);
4462                         return 1;
4463                 }
4464                 else if ((command == "TIME") && (pcnt > 0))
4465                 {
4466                         return this->HandleTime(parameters,pcnt,user);
4467                 }
4468                 else if (command == "LUSERS")
4469                 {
4470                         this->HandleLusers(parameters,pcnt,user);
4471                         return 1;
4472                 }
4473                 else if (command == "LINKS")
4474                 {
4475                         this->HandleLinks(parameters,pcnt,user);
4476                         return 1;
4477                 }
4478                 else if (command == "WHOIS")
4479                 {
4480                         if (pcnt > 1)
4481                         {
4482                                 // remote whois
4483                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4484                         }
4485                 }
4486                 else if ((command == "VERSION") && (pcnt > 0))
4487                 {
4488                         this->HandleVersion(parameters,pcnt,user);
4489                         return 1;
4490                 }
4491
4492                 return 0;
4493         }
4494
4495         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4496         {
4497                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4498                 {
4499                         // this bit of code cleverly routes all module commands
4500                         // to all remote severs *automatically* so that modules
4501                         // can just handle commands locally, without having
4502                         // to have any special provision in place for remote
4503                         // commands and linking protocols.
4504                         std::deque<std::string> params;
4505                         params.clear();
4506                         for (int j = 0; j < pcnt; j++)
4507                         {
4508                                 if (strchr(parameters[j],' '))
4509                                 {
4510                                         params.push_back(":" + std::string(parameters[j]));
4511                                 }
4512                                 else
4513                                 {
4514                                         params.push_back(std::string(parameters[j]));
4515                                 }
4516                         }
4517                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4518                         Utils->DoOneToMany(user->nick,command,params);
4519                 }
4520         }
4521
4522         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4523         {
4524                 TreeServer* s = Utils->FindServer(servername);
4525                 if (s)
4526                 {
4527                         description = s->GetDesc();
4528                 }
4529         }
4530
4531         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4532         {
4533                 if (IS_LOCAL(source))
4534                 {
4535                         std::deque<std::string> params;
4536                         params.push_back(dest->nick);
4537                         params.push_back(channel->name);
4538                         Utils->DoOneToMany(source->nick,"INVITE",params);
4539                 }
4540         }
4541
4542         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4543         {
4544                 std::deque<std::string> params;
4545                 params.push_back(chan->name);
4546                 params.push_back(":"+topic);
4547                 Utils->DoOneToMany(user->nick,"TOPIC",params);
4548         }
4549
4550         virtual void OnWallops(userrec* user, const std::string &text)
4551         {
4552                 if (IS_LOCAL(user))
4553                 {
4554                         std::deque<std::string> params;
4555                         params.push_back(":"+text);
4556                         Utils->DoOneToMany(user->nick,"WALLOPS",params);
4557                 }
4558         }
4559
4560         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4561         {
4562                 if (target_type == TYPE_USER)
4563                 {
4564                         userrec* d = (userrec*)dest;
4565                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4566                         {
4567                                 std::deque<std::string> params;
4568                                 params.clear();
4569                                 params.push_back(d->nick);
4570                                 params.push_back(":"+text);
4571                                 Utils->DoOneToOne(user->nick,"NOTICE",params,d->server);
4572                         }
4573                 }
4574                 else if (target_type == TYPE_CHANNEL)
4575                 {
4576                         if (IS_LOCAL(user))
4577                         {
4578                                 chanrec *c = (chanrec*)dest;
4579                                 if (c)
4580                                 {
4581                                         std::string cname = c->name;
4582                                         if (status)
4583                                                 cname = status + cname;
4584                                         std::deque<TreeServer*> list;
4585                                         Utils->GetListOfServersForChannel(c,list);
4586                                         unsigned int ucount = list.size();
4587                                         for (unsigned int i = 0; i < ucount; i++)
4588                                         {
4589                                                 TreeSocket* Sock = list[i]->GetSocket();
4590                                                 if (Sock)
4591                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4592                                         }
4593                                 }
4594                         }
4595                 }
4596                 else if (target_type == TYPE_SERVER)
4597                 {
4598                         if (IS_LOCAL(user))
4599                         {
4600                                 char* target = (char*)dest;
4601                                 std::deque<std::string> par;
4602                                 par.push_back(target);
4603                                 par.push_back(":"+text);
4604                                 Utils->DoOneToMany(user->nick,"NOTICE",par);
4605                         }
4606                 }
4607         }
4608
4609         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4610         {
4611                 if (target_type == TYPE_USER)
4612                 {
4613                         // route private messages which are targetted at clients only to the server
4614                         // which needs to receive them
4615                         userrec* d = (userrec*)dest;
4616                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4617                         {
4618                                 std::deque<std::string> params;
4619                                 params.clear();
4620                                 params.push_back(d->nick);
4621                                 params.push_back(":"+text);
4622                                 Utils->DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4623                         }
4624                 }
4625                 else if (target_type == TYPE_CHANNEL)
4626                 {
4627                         if (IS_LOCAL(user))
4628                         {
4629                                 chanrec *c = (chanrec*)dest;
4630                                 if (c)
4631                                 {
4632                                         std::string cname = c->name;
4633                                         if (status)
4634                                                 cname = status + cname;
4635                                         std::deque<TreeServer*> list;
4636                                         Utils->GetListOfServersForChannel(c,list);
4637                                         unsigned int ucount = list.size();
4638                                         for (unsigned int i = 0; i < ucount; i++)
4639                                         {
4640                                                 TreeSocket* Sock = list[i]->GetSocket();
4641                                                 if (Sock)
4642                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4643                                         }
4644                                 }
4645                         }
4646                 }
4647                 else if (target_type == TYPE_SERVER)
4648                 {
4649                         if (IS_LOCAL(user))
4650                         {
4651                                 char* target = (char*)dest;
4652                                 std::deque<std::string> par;
4653                                 par.push_back(target);
4654                                 par.push_back(":"+text);
4655                                 Utils->DoOneToMany(user->nick,"PRIVMSG",par);
4656                         }
4657                 }
4658         }
4659
4660         virtual void OnBackgroundTimer(time_t curtime)
4661         {
4662                 AutoConnectServers(curtime);
4663                 DoPingChecks(curtime);
4664         }
4665
4666         virtual void OnUserJoin(userrec* user, chanrec* channel)
4667         {
4668                 // Only do this for local users
4669                 if (IS_LOCAL(user))
4670                 {
4671                         std::deque<std::string> params;
4672                         params.clear();
4673                         params.push_back(channel->name);
4674                         // set up their permissions and the channel TS with FJOIN.
4675                         // All users are FJOINed now, because a module may specify
4676                         // new joining permissions for the user.
4677                         params.clear();
4678                         params.push_back(channel->name);
4679                         params.push_back(ConvToStr(channel->age));
4680                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4681                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4682                 }
4683         }
4684
4685         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4686         {
4687                 // only occurs for local clients
4688                 if (user->registered != REG_ALL)
4689                         return;
4690                 std::deque<std::string> params;
4691                 params.push_back(newhost);
4692                 Utils->DoOneToMany(user->nick,"FHOST",params);
4693         }
4694
4695         virtual void OnChangeName(userrec* user, const std::string &gecos)
4696         {
4697                 // only occurs for local clients
4698                 if (user->registered != REG_ALL)
4699                         return;
4700                 std::deque<std::string> params;
4701                 params.push_back(gecos);
4702                 Utils->DoOneToMany(user->nick,"FNAME",params);
4703         }
4704
4705         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4706         {
4707                 if (IS_LOCAL(user))
4708                 {
4709                         std::deque<std::string> params;
4710                         params.push_back(channel->name);
4711                         if (partmessage != "")
4712                                 params.push_back(":"+partmessage);
4713                         Utils->DoOneToMany(user->nick,"PART",params);
4714                 }
4715         }
4716
4717         virtual void OnUserConnect(userrec* user)
4718         {
4719                 char agestr[MAXBUF];
4720                 if (IS_LOCAL(user))
4721                 {
4722                         std::deque<std::string> params;
4723                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4724                         params.push_back(agestr);
4725                         params.push_back(user->nick);
4726                         params.push_back(user->host);
4727                         params.push_back(user->dhost);
4728                         params.push_back(user->ident);
4729                         params.push_back("+"+std::string(user->FormatModes()));
4730                         params.push_back(user->GetIPString());
4731                         params.push_back(":"+std::string(user->fullname));
4732                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4733
4734                         // User is Local, change needs to be reflected!
4735                         TreeServer* SourceServer = Utils->FindServer(user->server);
4736                         if (SourceServer)
4737                         {
4738                                 SourceServer->AddUserCount();
4739                         }
4740
4741                 }
4742         }
4743
4744         virtual void OnUserQuit(userrec* user, const std::string &reason)
4745         {
4746                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4747                 {
4748                         std::deque<std::string> params;
4749                         params.push_back(":"+reason);
4750                         Utils->DoOneToMany(user->nick,"QUIT",params);
4751                 }
4752                 // Regardless, We need to modify the user Counts..
4753                 TreeServer* SourceServer = Utils->FindServer(user->server);
4754                 if (SourceServer)
4755                 {
4756                         SourceServer->DelUserCount();
4757                 }
4758
4759         }
4760
4761         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4762         {
4763                 if (IS_LOCAL(user))
4764                 {
4765                         std::deque<std::string> params;
4766                         params.push_back(user->nick);
4767                         Utils->DoOneToMany(oldnick,"NICK",params);
4768                 }
4769         }
4770
4771         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4772         {
4773                 if ((source) && (IS_LOCAL(source)))
4774                 {
4775                         std::deque<std::string> params;
4776                         params.push_back(chan->name);
4777                         params.push_back(user->nick);
4778                         params.push_back(":"+reason);
4779                         Utils->DoOneToMany(source->nick,"KICK",params);
4780                 }
4781                 else if (!source)
4782                 {
4783                         std::deque<std::string> params;
4784                         params.push_back(chan->name);
4785                         params.push_back(user->nick);
4786                         params.push_back(":"+reason);
4787                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4788                 }
4789         }
4790
4791         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4792         {
4793                 std::deque<std::string> params;
4794                 params.push_back(dest->nick);
4795                 params.push_back(":"+reason);
4796                 Utils->DoOneToMany(source->nick,"KILL",params);
4797         }
4798
4799         virtual void OnRehash(const std::string &parameter)
4800         {
4801                 if (parameter != "")
4802                 {
4803                         std::deque<std::string> params;
4804                         params.push_back(parameter);
4805                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4806                         // check for self
4807                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4808                         {
4809                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4810                                 ServerInstance->RehashServer();
4811                         }
4812                 }
4813                 Utils->ReadConfiguration(false);
4814         }
4815
4816         // note: the protocol does not allow direct umode +o except
4817         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4818         // locally.
4819         virtual void OnOper(userrec* user, const std::string &opertype)
4820         {
4821                 if (IS_LOCAL(user))
4822                 {
4823                         std::deque<std::string> params;
4824                         params.push_back(opertype);
4825                         Utils->DoOneToMany(user->nick,"OPERTYPE",params);
4826                 }
4827         }
4828
4829         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4830         {
4831                 if (IS_LOCAL(source))
4832                 {
4833                         char type[8];
4834                         snprintf(type,8,"%cLINE",linetype);
4835                         std::string stype = type;
4836                         if (adding)
4837                         {
4838                                 char sduration[MAXBUF];
4839                                 snprintf(sduration,MAXBUF,"%ld",duration);
4840                                 std::deque<std::string> params;
4841                                 params.push_back(host);
4842                                 params.push_back(sduration);
4843                                 params.push_back(":"+reason);
4844                                 Utils->DoOneToMany(source->nick,stype,params);
4845                         }
4846                         else
4847                         {
4848                                 std::deque<std::string> params;
4849                                 params.push_back(host);
4850                                 Utils->DoOneToMany(source->nick,stype,params);
4851                         }
4852                 }
4853         }
4854
4855         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4856         {
4857                 OnLine(source,hostmask,true,'G',duration,reason);
4858         }
4859
4860         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4861         {
4862                 OnLine(source,ipmask,true,'Z',duration,reason);
4863         }
4864
4865         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4866         {
4867                 OnLine(source,nickmask,true,'Q',duration,reason);
4868         }
4869
4870         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4871         {
4872                 OnLine(source,hostmask,true,'E',duration,reason);
4873         }
4874
4875         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4876         {
4877                 OnLine(source,hostmask,false,'G',0,"");
4878         }
4879
4880         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4881         {
4882                 OnLine(source,ipmask,false,'Z',0,"");
4883         }
4884
4885         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4886         {
4887                 OnLine(source,nickmask,false,'Q',0,"");
4888         }
4889
4890         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4891         {
4892                 OnLine(source,hostmask,false,'E',0,"");
4893         }
4894
4895         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4896         {
4897                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4898                 {
4899                         if (target_type == TYPE_USER)
4900                         {
4901                                 userrec* u = (userrec*)dest;
4902                                 std::deque<std::string> params;
4903                                 params.push_back(u->nick);
4904                                 params.push_back(text);
4905                                 Utils->DoOneToMany(user->nick,"MODE",params);
4906                         }
4907                         else
4908                         {
4909                                 chanrec* c = (chanrec*)dest;
4910                                 std::deque<std::string> params;
4911                                 params.push_back(c->name);
4912                                 params.push_back(text);
4913                                 Utils->DoOneToMany(user->nick,"MODE",params);
4914                         }
4915                 }
4916         }
4917
4918         virtual void OnSetAway(userrec* user)
4919         {
4920                 if (IS_LOCAL(user))
4921                 {
4922                         std::deque<std::string> params;
4923                         params.push_back(":"+std::string(user->awaymsg));
4924                         Utils->DoOneToMany(user->nick,"AWAY",params);
4925                 }
4926         }
4927
4928         virtual void OnCancelAway(userrec* user)
4929         {
4930                 if (IS_LOCAL(user))
4931                 {
4932                         std::deque<std::string> params;
4933                         params.clear();
4934                         Utils->DoOneToMany(user->nick,"AWAY",params);
4935                 }
4936         }
4937
4938         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4939         {
4940                 TreeSocket* s = (TreeSocket*)opaque;
4941                 if (target)
4942                 {
4943                         if (target_type == TYPE_USER)
4944                         {
4945                                 userrec* u = (userrec*)target;
4946                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4947                         }
4948                         else
4949                         {
4950                                 chanrec* c = (chanrec*)target;
4951                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4952                         }
4953                 }
4954         }
4955
4956         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4957         {
4958                 TreeSocket* s = (TreeSocket*)opaque;
4959                 if (target)
4960                 {
4961                         if (target_type == TYPE_USER)
4962                         {
4963                                 userrec* u = (userrec*)target;
4964                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4965                         }
4966                         else if (target_type == TYPE_OTHER)
4967                         {
4968                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4969                         }
4970                         else if (target_type == TYPE_CHANNEL)
4971                         {
4972                                 chanrec* c = (chanrec*)target;
4973                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4974                         }
4975                 }
4976         }
4977
4978         virtual void OnEvent(Event* event)
4979         {
4980                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4981
4982                 if (event->GetEventID() == "send_metadata")
4983                 {
4984                         if (params->size() < 3)
4985                                 return;
4986                         (*params)[2] = ":" + (*params)[2];
4987                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4988                 }
4989                 else if (event->GetEventID() == "send_topic")
4990                 {
4991                         if (params->size() < 2)
4992                                 return;
4993                         (*params)[1] = ":" + (*params)[1];
4994                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
4995                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time()));
4996                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
4997                 }
4998                 else if (event->GetEventID() == "send_mode")
4999                 {
5000                         if (params->size() < 2)
5001                                 return;
5002                         // Insert the TS value of the object, either userrec or chanrec
5003                         time_t ourTS = 0;
5004                         userrec* a = ServerInstance->FindNick((*params)[0]);
5005                         if (a)
5006                         {
5007                                 ourTS = a->age;
5008                         }
5009                         else
5010                         {
5011                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
5012                                 if (a)
5013                                 {
5014                                         ourTS = a->age;
5015                                 }
5016                         }
5017                         params->insert(params->begin() + 1,ConvToStr(ourTS));
5018                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
5019                 }
5020         }
5021
5022         virtual ~ModuleSpanningTree()
5023         {
5024                 ServerInstance->Log(DEBUG,"Performing unload of spanningtree!");
5025                 /* This will also free the listeners */
5026                 delete Utils;
5027         }
5028
5029         virtual Version GetVersion()
5030         {
5031                 return Version(1,1,0,2,VF_VENDOR,API_VERSION);
5032         }
5033
5034         void Implements(char* List)
5035         {
5036                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
5037                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
5038                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
5039                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
5040                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
5041                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
5042                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
5043         }
5044
5045         /* It is IMPORTANT that m_spanningtree is the last module in the chain
5046          * so that any activity it sees is FINAL, e.g. we arent going to send out
5047          * a NICK message before m_cloaking has finished putting the +x on the user,
5048          * etc etc.
5049          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
5050          * the module call queue.
5051          */
5052         Priority Prioritize()
5053         {
5054                 return PRIORITY_LAST;
5055         }
5056 };
5057
5058 void SpanningTreeUtilities::DoFailOver(Link* x)
5059 {
5060         if (x->FailOver.length())
5061         {
5062                 if (x->FailOver == x->Name)
5063                 {
5064                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Some muppet configured the failover for server \002%s\002 to point at itself. Not following it!", x->Name.c_str());
5065                         return;
5066                 }
5067                 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
5068                 if (TryThisOne)
5069                 {
5070                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
5071                         Creator->ConnectServer(TryThisOne);
5072                 }
5073                 else
5074                 {
5075                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
5076                 }
5077         }
5078 }
5079
5080 Link* SpanningTreeUtilities::FindLink(const std::string& name)
5081 {
5082         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
5083         {
5084                 if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
5085                 {
5086                         return &(*x);
5087                 }
5088         }
5089         return NULL;
5090 }
5091
5092
5093 class ModuleSpanningTreeFactory : public ModuleFactory
5094 {
5095  public:
5096         ModuleSpanningTreeFactory()
5097         {
5098         }
5099
5100         ~ModuleSpanningTreeFactory()
5101         {
5102         }
5103
5104         virtual Module * CreateModule(InspIRCd* Me)
5105         {
5106                 return new ModuleSpanningTree(Me);
5107         }
5108
5109 };
5110
5111
5112 extern "C" void * init_module( void )
5113 {
5114         return new ModuleSpanningTreeFactory;
5115 }