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                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1879                 char list[MAXBUF];
1880                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1881
1882                 size_t dlen, curlen;
1883                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1884                 int numusers = 0;
1885                 char* ptr = list + dlen;
1886
1887                 CUList *ulist = c->GetUsers();
1888                 std::string modes = "";
1889                 std::string params = "";
1890
1891                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1892                 {
1893                         // The first parameter gets a : before it
1894                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1895
1896                         curlen += ptrlen;
1897                         ptr += ptrlen;
1898
1899                         numusers++;
1900
1901                         if (curlen > (480-NICKMAX))
1902                         {
1903                                 this->WriteLine(list);
1904                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1905                                 ptr = list + dlen;
1906                                 ptrlen = 0;
1907                                 numusers = 0;
1908                         }
1909                 }
1910
1911                 if (numusers)
1912                         this->WriteLine(list);
1913
1914                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1915                 {
1916                         modes.append("b");
1917                         params.append(b->data).append(" ");
1918                 }
1919                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1920         }
1921
1922         /** Send G, Q, Z and E lines */
1923         void SendXLines(TreeServer* Current)
1924         {
1925                 char data[MAXBUF];
1926                 std::string n = this->Instance->Config->ServerName;
1927                 const char* sn = n.c_str();
1928                 int iterations = 0;
1929                 /* Yes, these arent too nice looking, but they get the job done */
1930                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1931                 {
1932                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1933                         this->WriteLine(data);
1934                 }
1935                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1936                 {
1937                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1938                         this->WriteLine(data);
1939                 }
1940                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1941                 {
1942                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1943                         this->WriteLine(data);
1944                 }
1945                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1946                 {
1947                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1948                         this->WriteLine(data);
1949                 }
1950                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1951                 {
1952                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1953                         this->WriteLine(data);
1954                 }
1955                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1956                 {
1957                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1958                         this->WriteLine(data);
1959                 }
1960                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1961                 {
1962                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1963                         this->WriteLine(data);
1964                 }
1965                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1966                 {
1967                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1968                         this->WriteLine(data);
1969                 }
1970         }
1971
1972         /** Send channel modes and topics */
1973         void SendChannelModes(TreeServer* Current)
1974         {
1975                 char data[MAXBUF];
1976                 std::deque<std::string> list;
1977                 int iterations = 0;
1978                 std::string n = this->Instance->Config->ServerName;
1979                 const char* sn = n.c_str();
1980                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1981                 {
1982                         SendFJoins(Current, c->second);
1983                         if (*c->second->topic)
1984                         {
1985                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1986                                 this->WriteLine(data);
1987                         }
1988                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
1989                         list.clear();
1990                         c->second->GetExtList(list);
1991                         for (unsigned int j = 0; j < list.size(); j++)
1992                         {
1993                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
1994                         }
1995                 }
1996         }
1997
1998         /** send all users and their oper state/modes */
1999         void SendUsers(TreeServer* Current)
2000         {
2001                 char data[MAXBUF];
2002                 std::deque<std::string> list;
2003                 int iterations = 0;
2004                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
2005                 {
2006                         if (u->second->registered == REG_ALL)
2007                         {
2008                                 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);
2009                                 this->WriteLine(data);
2010                                 if (*u->second->oper)
2011                                 {
2012                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
2013                                 }
2014                                 if (*u->second->awaymsg)
2015                                 {
2016                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
2017                                 }
2018                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
2019                                 list.clear();
2020                                 u->second->GetExtList(list);
2021                                 for (unsigned int j = 0; j < list.size(); j++)
2022                                 {
2023                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
2024                                 }
2025                         }
2026                 }
2027         }
2028
2029         /** This function is called when we want to send a netburst to a local
2030          * server. There is a set order we must do this, because for example
2031          * users require their servers to exist, and channels require their
2032          * users to exist. You get the idea.
2033          */
2034         void DoBurst(TreeServer* s)
2035         {
2036                 std::string burst = "BURST "+ConvToStr(time(NULL));
2037                 std::string endburst = "ENDBURST";
2038                 // Because by the end of the netburst, it  could be gone!
2039                 std::string name = s->GetName();
2040                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
2041                 this->WriteLine(burst);
2042                 /* send our version string */
2043                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
2044                 /* Send server tree */
2045                 this->SendServers(Utils->TreeRoot,s,1);
2046                 /* Send users and their oper status */
2047                 this->SendUsers(s);
2048                 /* Send everything else (channel modes, xlines etc) */
2049                 this->SendChannelModes(s);
2050                 this->SendXLines(s);
2051                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
2052                 this->WriteLine(endburst);
2053                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
2054         }
2055
2056         /** This function is called when we receive data from a remote
2057          * server. We buffer the data in a std::string (it doesnt stay
2058          * there for long), reading using InspSocket::Read() which can
2059          * read up to 16 kilobytes in one operation.
2060          *
2061          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
2062          * THE SOCKET OBJECT FOR US.
2063          */
2064         virtual bool OnDataReady()
2065         {
2066                 char* data = this->Read();
2067                 /* Check that the data read is a valid pointer and it has some content */
2068                 if (data && *data)
2069                 {
2070                         this->in_buffer.append(data);
2071                         /* While there is at least one new line in the buffer,
2072                          * do something useful (we hope!) with it.
2073                          */
2074                         while (in_buffer.find("\n") != std::string::npos)
2075                         {
2076                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
2077                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
2078                                 /* Use rfind here not find, as theres more
2079                                  * chance of the \r being near the end of the
2080                                  * string, not the start.
2081                                  */
2082                                 if (ret.find("\r") != std::string::npos)
2083                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
2084                                 /* Process this one, abort if it
2085                                  * didnt return true.
2086                                  */
2087                                 if (this->ctx_in)
2088                                 {
2089                                         char out[1024];
2090                                         char result[1024];
2091                                         memset(result,0,1024);
2092                                         memset(out,0,1024);
2093                                         /* ERROR + CAPAB is still allowed unencryped */
2094                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
2095                                         {
2096                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
2097                                                 if ((nbytes > 0) && (nbytes < 1024))
2098                                                 {
2099                                                         ctx_in->Decrypt(out, result, nbytes, 0);
2100                                                         for (int t = 0; t < nbytes; t++)
2101                                                         {
2102                                                                 if (result[t] == '\7')
2103                                                                 {
2104                                                                         /* We only need to stick a \0 on the
2105                                                                          * first \7, the rest will be lost
2106                                                                          */
2107                                                                         result[t] = 0;
2108                                                                         break;
2109                                                                 }
2110                                                         }
2111                                                         ret = result;
2112                                                 }
2113                                         }
2114                                 }
2115                                 if (!this->ProcessLine(ret))
2116                                 {
2117                                         return false;
2118                                 }
2119                         }
2120                         return true;
2121                 }
2122                 /* EAGAIN returns an empty but non-NULL string, so this
2123                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2124                  */
2125                 return (data && !*data);
2126         }
2127
2128         int WriteLine(std::string line)
2129         {
2130                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2131                 if (this->ctx_out)
2132                 {
2133                         char result[10240];
2134                         char result64[10240];
2135                         if (this->keylength)
2136                         {
2137                                 // pad it to the key length
2138                                 int n = this->keylength - (line.length() % this->keylength);
2139                                 if (n)
2140                                         line.append(n,'\7');
2141                         }
2142                         unsigned int ll = line.length();
2143                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2144                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2145                         line = result64;
2146                 }
2147                 line.append("\r\n");
2148                 return this->Write(line);
2149         }
2150
2151         /* Handle ERROR command */
2152         bool Error(std::deque<std::string> &params)
2153         {
2154                 if (params.size() < 1)
2155                         return false;
2156                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2157                 /* we will return false to cause the socket to close. */
2158                 return false;
2159         }
2160
2161         /** remote MOTD. leet, huh? */
2162         bool Motd(const std::string &prefix, std::deque<std::string> &params)
2163         {
2164                 if (params.size() > 0)
2165                 {
2166                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2167                         {
2168                                 /* It's for our server */
2169                                 string_list results;
2170                                 userrec* source = this->Instance->FindNick(prefix);
2171
2172                                 if (source)
2173                                 {
2174                                         std::deque<std::string> par;
2175                                         par.push_back(prefix);
2176                                         par.push_back("");
2177
2178                                         if (!Instance->Config->MOTD.size())
2179                                         {
2180                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2181                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2182                                                 return true;
2183                                         }
2184
2185                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2186                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2187
2188                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2189                                         {
2190                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2191                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2192                                         }
2193
2194                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2195                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2196                                 }
2197                         }
2198                         else
2199                         {
2200                                 /* Pass it on */
2201                                 userrec* source = this->Instance->FindNick(prefix);
2202                                 if (source)
2203                                         Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
2204                         }
2205                 }
2206                 return true;
2207         }
2208
2209         /** remote ADMIN. leet, huh? */
2210         bool Admin(const std::string &prefix, std::deque<std::string> &params)
2211         {
2212                 if (params.size() > 0)
2213                 {
2214                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2215                         {
2216                                 /* It's for our server */
2217                                 string_list results;
2218                                 userrec* source = this->Instance->FindNick(prefix);
2219
2220                                 if (source)
2221                                 {
2222                                         std::deque<std::string> par;
2223                                         par.push_back(prefix);
2224                                         par.push_back("");
2225
2226                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2227                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2228
2229                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2230                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2231
2232                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2233                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2234
2235                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2236                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2237                                 }
2238                         }
2239                         else
2240                         {
2241                                 /* Pass it on */
2242                                 userrec* source = this->Instance->FindNick(prefix);
2243                                 if (source)
2244                                         Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
2245                         }
2246                 }
2247                 return true;
2248         }
2249
2250         bool Stats(const std::string &prefix, std::deque<std::string> &params)
2251         {
2252                 /* Get the reply to a STATS query if it matches this servername,
2253                  * and send it back as a load of PUSH queries
2254                  */
2255                 if (params.size() > 1)
2256                 {
2257                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2258                         {
2259                                 /* It's for our server */
2260                                 string_list results;
2261                                 userrec* source = this->Instance->FindNick(prefix);
2262                                 if (source)
2263                                 {
2264                                         std::deque<std::string> par;
2265                                         par.push_back(prefix);
2266                                         par.push_back("");
2267                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2268                                         for (size_t i = 0; i < results.size(); i++)
2269                                         {
2270                                                 par[1] = "::" + results[i];
2271                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2272                                         }
2273                                 }
2274                         }
2275                         else
2276                         {
2277                                 /* Pass it on */
2278                                 userrec* source = this->Instance->FindNick(prefix);
2279                                 if (source)
2280                                         Utils->DoOneToOne(prefix, "STATS", params, params[1]);
2281                         }
2282                 }
2283                 return true;
2284         }
2285
2286
2287         /** Because the core won't let users or even SERVERS set +o,
2288          * we use the OPERTYPE command to do this.
2289          */
2290         bool OperType(const std::string &prefix, std::deque<std::string> &params)
2291         {
2292                 if (params.size() != 1)
2293                 {
2294                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2295                         return true;
2296                 }
2297                 std::string opertype = params[0];
2298                 userrec* u = this->Instance->FindNick(prefix);
2299                 if (u)
2300                 {
2301                         u->modes[UM_OPERATOR] = 1;
2302                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2303                         Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2304                 }
2305                 return true;
2306         }
2307
2308         /** Because Andy insists that services-compatible servers must
2309          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2310          */
2311         bool ForceNick(const std::string &prefix, std::deque<std::string> &params)
2312         {
2313                 if (params.size() < 3)
2314                         return true;
2315
2316                 userrec* u = this->Instance->FindNick(params[0]);
2317
2318                 if (u)
2319                 {
2320                         Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2321                         if (IS_LOCAL(u))
2322                         {
2323                                 std::deque<std::string> par;
2324                                 par.push_back(params[1]);
2325                                 /* This is not required as one is sent in OnUserPostNick below
2326                                  */
2327                                 //Utils->DoOneToMany(u->nick,"NICK",par);
2328                                 if (!u->ForceNickChange(params[1].c_str()))
2329                                 {
2330                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2331                                         return true;
2332                                 }
2333                                 u->age = atoi(params[2].c_str());
2334                         }
2335                 }
2336                 return true;
2337         }
2338
2339         bool ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
2340         {
2341                 if (params.size() < 2)
2342                         return true;
2343
2344                 userrec* u = this->Instance->FindNick(params[0]);
2345
2346                 if (u)
2347                 {
2348                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2349                         Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2350                 }
2351                 return true;
2352         }
2353
2354         bool RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
2355         {
2356                 if (params.size() < 1)
2357                         return false;
2358
2359                 std::string servermask = params[0];
2360
2361                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2362                 {
2363                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2364                         this->Instance->RehashServer();
2365                         Utils->ReadConfiguration(false);
2366                         InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
2367                 }
2368                 Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
2369                 return true;
2370         }
2371
2372         bool RemoteKill(const std::string &prefix, std::deque<std::string> &params)
2373         {
2374                 if (params.size() != 2)
2375                         return true;
2376
2377                 std::string nick = params[0];
2378                 userrec* u = this->Instance->FindNick(prefix);
2379                 userrec* who = this->Instance->FindNick(nick);
2380
2381                 if (who)
2382                 {
2383                         /* Prepend kill source, if we don't have one */
2384                         std::string sourceserv = prefix;
2385                         if (u)
2386                         {
2387                                 sourceserv = u->server;
2388                         }
2389                         if (*(params[1].c_str()) != '[')
2390                         {
2391                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2392                         }
2393                         std::string reason = params[1];
2394                         params[1] = ":" + params[1];
2395                         Utils->DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2396                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2397                         userrec::QuitUser(this->Instance,who,reason);
2398                 }
2399                 return true;
2400         }
2401
2402         bool LocalPong(const std::string &prefix, std::deque<std::string> &params)
2403         {
2404                 if (params.size() < 1)
2405                         return true;
2406
2407                 if (params.size() == 1)
2408                 {
2409                         TreeServer* ServerSource = Utils->FindServer(prefix);
2410                         if (ServerSource)
2411                         {
2412                                 ServerSource->SetPingFlag();
2413                         }
2414                 }
2415                 else
2416                 {
2417                         std::string forwardto = params[1];
2418                         if (forwardto == this->Instance->Config->ServerName)
2419                         {
2420                                 /*
2421                                  * this is a PONG for us
2422                                  * if the prefix is a user, check theyre local, and if they are,
2423                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2424                                  * Services might want to send these s->s, but we dont need to yet.
2425                                  */
2426                                 userrec* u = this->Instance->FindNick(prefix);
2427
2428                                 if (u)
2429                                 {
2430                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2431                                 }
2432                         }
2433                         else
2434                         {
2435                                 // not for us, pass it on :)
2436                                 Utils->DoOneToOne(prefix,"PONG",params,forwardto);
2437                         }
2438                 }
2439
2440                 return true;
2441         }
2442
2443         bool MetaData(const std::string &prefix, std::deque<std::string> &params)
2444         {
2445                 if (params.size() < 3)
2446                         return true;
2447
2448                 TreeServer* ServerSource = Utils->FindServer(prefix);
2449
2450                 if (ServerSource)
2451                 {
2452                         if (params[0] == "*")
2453                         {
2454                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2455                         }
2456                         else if (*(params[0].c_str()) == '#')
2457                         {
2458                                 chanrec* c = this->Instance->FindChan(params[0]);
2459                                 if (c)
2460                                 {
2461                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2462                                 }
2463                         }
2464                         else if (*(params[0].c_str()) != '#')
2465                         {
2466                                 userrec* u = this->Instance->FindNick(params[0]);
2467                                 if (u)
2468                                 {
2469                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2470                                 }
2471                         }
2472                 }
2473
2474                 params[2] = ":" + params[2];
2475                 Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
2476                 return true;
2477         }
2478
2479         bool ServerVersion(const std::string &prefix, std::deque<std::string> &params)
2480         {
2481                 if (params.size() < 1)
2482                         return true;
2483
2484                 TreeServer* ServerSource = Utils->FindServer(prefix);
2485
2486                 if (ServerSource)
2487                 {
2488                         ServerSource->SetVersion(params[0]);
2489                 }
2490                 params[0] = ":" + params[0];
2491                 Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
2492                 return true;
2493         }
2494
2495         bool ChangeHost(const std::string &prefix, std::deque<std::string> &params)
2496         {
2497                 if (params.size() < 1)
2498                         return true;
2499
2500                 userrec* u = this->Instance->FindNick(prefix);
2501
2502                 if (u)
2503                 {
2504                         u->ChangeDisplayedHost(params[0].c_str());
2505                         Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
2506                 }
2507                 return true;
2508         }
2509
2510         bool AddLine(const std::string &prefix, std::deque<std::string> &params)
2511         {
2512                 if (params.size() < 6)
2513                         return true;
2514
2515                 bool propogate = false;
2516
2517                 switch (*(params[0].c_str()))
2518                 {
2519                         case 'Z':
2520                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2521                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2522                         break;
2523                         case 'Q':
2524                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2525                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2526                         break;
2527                         case 'E':
2528                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2529                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2530                         break;
2531                         case 'G':
2532                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2533                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2534                         break;
2535                         case 'K':
2536                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2537                         break;
2538                         default:
2539                                 /* Just in case... */
2540                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2541                                 propogate = false;
2542                         break;
2543                 }
2544
2545                 /* Send it on its way */
2546                 if (propogate)
2547                 {
2548                         if (atoi(params[4].c_str()))
2549                         {
2550                                 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());
2551                         }
2552                         else
2553                         {
2554                                 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());
2555                         }
2556                         params[5] = ":" + params[5];
2557                         Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2558                 }
2559                 if (!this->bursting)
2560                 {
2561                         Instance->Log(DEBUG,"Applying lines...");
2562                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2563                 }
2564                 return true;
2565         }
2566
2567         bool ChangeName(const std::string &prefix, std::deque<std::string> &params)
2568         {
2569                 if (params.size() < 1)
2570                         return true;
2571
2572                 userrec* u = this->Instance->FindNick(prefix);
2573
2574                 if (u)
2575                 {
2576                         u->ChangeName(params[0].c_str());
2577                         params[0] = ":" + params[0];
2578                         Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
2579                 }
2580                 return true;
2581         }
2582
2583         bool Whois(const std::string &prefix, std::deque<std::string> &params)
2584         {
2585                 if (params.size() < 1)
2586                         return true;
2587
2588                 Instance->Log(DEBUG,"In IDLE command");
2589                 userrec* u = this->Instance->FindNick(prefix);
2590
2591                 if (u)
2592                 {
2593                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2594                         // an incoming request
2595                         if (params.size() == 1)
2596                         {
2597                                 userrec* x = this->Instance->FindNick(params[0]);
2598                                 if ((x) && (IS_LOCAL(x)))
2599                                 {
2600                                         userrec* x = this->Instance->FindNick(params[0]);
2601                                         char signon[MAXBUF];
2602                                         char idle[MAXBUF];
2603
2604                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2605                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2606                                         std::deque<std::string> par;
2607                                         par.push_back(prefix);
2608                                         par.push_back(signon);
2609                                         par.push_back(idle);
2610                                         // ours, we're done, pass it BACK
2611                                         Utils->DoOneToOne(params[0],"IDLE",par,u->server);
2612                                 }
2613                                 else
2614                                 {
2615                                         // not ours pass it on
2616                                         Utils->DoOneToOne(prefix,"IDLE",params,x->server);
2617                                 }
2618                         }
2619                         else if (params.size() == 3)
2620                         {
2621                                 std::string who_did_the_whois = params[0];
2622                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2623                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2624                                 {
2625                                         // an incoming reply to a whois we sent out
2626                                         std::string nick_whoised = prefix;
2627                                         unsigned long signon = atoi(params[1].c_str());
2628                                         unsigned long idle = atoi(params[2].c_str());
2629                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2630                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2631                                 }
2632                                 else
2633                                 {
2634                                         // not ours, pass it on
2635                                         Utils->DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2636                                 }
2637                         }
2638                 }
2639                 return true;
2640         }
2641
2642         bool Push(const std::string &prefix, std::deque<std::string> &params)
2643         {
2644                 if (params.size() < 2)
2645                         return true;
2646
2647                 userrec* u = this->Instance->FindNick(params[0]);
2648
2649                 if (!u)
2650                         return true;
2651
2652                 if (IS_LOCAL(u))
2653                 {
2654                         u->Write(params[1]);
2655                 }
2656                 else
2657                 {
2658                         // continue the raw onwards
2659                         params[1] = ":" + params[1];
2660                         Utils->DoOneToOne(prefix,"PUSH",params,u->server);
2661                 }
2662                 return true;
2663         }
2664
2665         bool Time(const std::string &prefix, std::deque<std::string> &params)
2666         {
2667                 // :source.server TIME remote.server sendernick
2668                 // :remote.server TIME source.server sendernick TS
2669                 if (params.size() == 2)
2670                 {
2671                         // someone querying our time?
2672                         if (this->Instance->Config->ServerName == params[0])
2673                         {
2674                                 userrec* u = this->Instance->FindNick(params[1]);
2675                                 if (u)
2676                                 {
2677                                         char curtime[256];
2678                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2679                                         params.push_back(curtime);
2680                                         params[0] = prefix;
2681                                         Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2682                                 }
2683                         }
2684                         else
2685                         {
2686                                 // not us, pass it on
2687                                 userrec* u = this->Instance->FindNick(params[1]);
2688                                 if (u)
2689                                         Utils->DoOneToOne(prefix,"TIME",params,params[0]);
2690                         }
2691                 }
2692                 else if (params.size() == 3)
2693                 {
2694                         // a response to a previous TIME
2695                         userrec* u = this->Instance->FindNick(params[1]);
2696                         if ((u) && (IS_LOCAL(u)))
2697                         {
2698                         time_t rawtime = atol(params[2].c_str());
2699                         struct tm * timeinfo;
2700                         timeinfo = localtime(&rawtime);
2701                                 char tms[26];
2702                                 snprintf(tms,26,"%s",asctime(timeinfo));
2703                                 tms[24] = 0;
2704                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2705                         }
2706                         else
2707                         {
2708                                 if (u)
2709                                         Utils->DoOneToOne(prefix,"TIME",params,u->server);
2710                         }
2711                 }
2712                 return true;
2713         }
2714
2715         bool LocalPing(const std::string &prefix, std::deque<std::string> &params)
2716         {
2717                 if (params.size() < 1)
2718                         return true;
2719
2720                 if (params.size() == 1)
2721                 {
2722                         std::string stufftobounce = params[0];
2723                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2724                         return true;
2725                 }
2726                 else
2727                 {
2728                         std::string forwardto = params[1];
2729                         if (forwardto == this->Instance->Config->ServerName)
2730                         {
2731                                 // this is a ping for us, send back PONG to the requesting server
2732                                 params[1] = params[0];
2733                                 params[0] = forwardto;
2734                                 Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
2735                         }
2736                         else
2737                         {
2738                                 // not for us, pass it on :)
2739                                 Utils->DoOneToOne(prefix,"PING",params,forwardto);
2740                         }
2741                         return true;
2742                 }
2743         }
2744
2745         bool RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
2746         {
2747                 if (params.size() < 1)
2748                         return true;
2749
2750                 chanrec* c = Instance->FindChan(params[0]);
2751
2752                 if (c)
2753                 {
2754                         irc::modestacker modestack(false);
2755                         CUList *ulist = c->GetUsers();
2756                         const char* y[127];
2757                         std::deque<std::string> stackresult;
2758                         std::string x;
2759
2760                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2761                         {
2762                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2763                                 if (modesequence.length())
2764                                 {
2765                                         Instance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2766                                         irc::spacesepstream sep(modesequence);
2767                                         std::string modeletters = sep.GetToken();
2768                                         Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2769
2770                                         while (!modeletters.empty())
2771                                         {
2772                                                 char mletter = *(modeletters.begin());
2773                                                 modestack.Push(mletter,sep.GetToken());
2774                                                 Instance->Log(DEBUG,"Push letter = '%c'",mletter);
2775                                                 modeletters.erase(modeletters.begin());
2776                                                 Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2777                                         }
2778                                 }
2779                         }
2780
2781                         while (modestack.GetStackedLine(stackresult))
2782                         {
2783                                 Instance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2784                                 stackresult.push_front(ConvToStr(c->age));
2785                                 stackresult.push_front(c->name);
2786                                 Utils->DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2787                                 stackresult.erase(stackresult.begin() + 1);
2788                                 Instance->Log(DEBUG,"Stacked items:");
2789                                 for (size_t z = 0; z < stackresult.size(); z++)
2790                                 {
2791                                         y[z] = stackresult[z].c_str();
2792                                         Instance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2793                                 }
2794                                 userrec* n = new userrec(Instance);
2795                                 n->SetFd(FD_MAGIC_NUMBER);
2796                                 Instance->SendMode(y, stackresult.size(), n);
2797                                 delete n;
2798                         }
2799                 }
2800                 return true;
2801         }
2802
2803         bool RemoteServer(const std::string &prefix, std::deque<std::string> &params)
2804         {
2805                 if (params.size() < 4)
2806                         return false;
2807
2808                 std::string servername = params[0];
2809                 std::string password = params[1];
2810                 // hopcount is not used for a remote server, we calculate this ourselves
2811                 std::string description = params[3];
2812                 TreeServer* ParentOfThis = Utils->FindServer(prefix);
2813
2814                 if (!ParentOfThis)
2815                 {
2816                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2817                         return false;
2818                 }
2819                 TreeServer* CheckDupe = Utils->FindServer(servername);
2820                 if (CheckDupe)
2821                 {
2822                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2823                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2824                         return false;
2825                 }
2826                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL);
2827                 ParentOfThis->AddChild(Node);
2828                 params[3] = ":" + params[3];
2829                 Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
2830                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2831                 return true;
2832         }
2833
2834         bool Outbound_Reply_Server(std::deque<std::string> &params)
2835         {
2836                 if (params.size() < 4)
2837                         return false;
2838
2839                 irc::string servername = params[0].c_str();
2840                 std::string sname = params[0];
2841                 std::string password = params[1];
2842                 int hops = atoi(params[2].c_str());
2843
2844                 if (hops)
2845                 {
2846                         this->WriteLine("ERROR :Server too far away for authentication");
2847                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2848                         return false;
2849                 }
2850                 std::string description = params[3];
2851                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2852                 {
2853                         if ((x->Name == servername) && (x->RecvPass == password))
2854                         {
2855                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2856                                 if (CheckDupe)
2857                                 {
2858                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2859                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2860                                         return false;
2861                                 }
2862                                 // Begin the sync here. this kickstarts the
2863                                 // other side, waiting in WAIT_AUTH_2 state,
2864                                 // into starting their burst, as it shows
2865                                 // that we're happy.
2866                                 this->LinkState = CONNECTED;
2867                                 // we should add the details of this server now
2868                                 // to the servers tree, as a child of the root
2869                                 // node.
2870                                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this);
2871                                 Utils->TreeRoot->AddChild(Node);
2872                                 params[3] = ":" + params[3];
2873                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
2874                                 this->bursting = true;
2875                                 this->DoBurst(Node);
2876                                 return true;
2877                         }
2878                 }
2879                 this->WriteLine("ERROR :Invalid credentials");
2880                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2881                 return false;
2882         }
2883
2884         bool Inbound_Server(std::deque<std::string> &params)
2885         {
2886                 if (params.size() < 4)
2887                         return false;
2888
2889                 irc::string servername = params[0].c_str();
2890                 std::string sname = params[0];
2891                 std::string password = params[1];
2892                 int hops = atoi(params[2].c_str());
2893
2894                 if (hops)
2895                 {
2896                         this->WriteLine("ERROR :Server too far away for authentication");
2897                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2898                         return false;
2899                 }
2900                 std::string description = params[3];
2901                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2902                 {
2903                         if ((x->Name == servername) && (x->RecvPass == password))
2904                         {
2905                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2906                                 if (CheckDupe)
2907                                 {
2908                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2909                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2910                                         return false;
2911                                 }
2912                                 /* If the config says this link is encrypted, but the remote side
2913                                  * hasnt bothered to send the AES command before SERVER, then we
2914                                  * boot them off as we MUST have this connection encrypted.
2915                                  */
2916                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2917                                 {
2918                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2919                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2920                                         return false;
2921                                 }
2922                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2923                                 this->InboundServerName = sname;
2924                                 this->InboundDescription = description;
2925                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2926                                 // along with the sendpass from this block.
2927                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2928                                 // move to the next state, we are now waiting for THEM.
2929                                 this->LinkState = WAIT_AUTH_2;
2930                                 return true;
2931                         }
2932                 }
2933                 this->WriteLine("ERROR :Invalid credentials");
2934                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2935                 return false;
2936         }
2937
2938         void Split(const std::string &line, std::deque<std::string> &n)
2939         {
2940                 n.clear();
2941                 irc::tokenstream tokens(line);
2942                 std::string param;
2943                 while ((param = tokens.GetToken()) != "")
2944                         n.push_back(param);
2945                 return;
2946         }
2947
2948         bool ProcessLine(std::string &line)
2949         {
2950                 std::deque<std::string> params;
2951                 irc::string command;
2952                 std::string prefix;
2953
2954                 if (line.empty())
2955                         return true;
2956
2957                 line = line.substr(0, line.find_first_of("\r\n"));
2958
2959                 Instance->Log(DEBUG,"IN: %s", line.c_str());
2960
2961                 this->Split(line.c_str(),params);
2962
2963                 if ((params[0][0] == ':') && (params.size() > 1))
2964                 {
2965                         prefix = params[0].substr(1);
2966                         params.pop_front();
2967                 }
2968
2969                 command = params[0].c_str();
2970                 params.pop_front();
2971
2972                 if ((!this->ctx_in) && (command == "AES"))
2973                 {
2974                         std::string sserv = params[0];
2975                         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2976                         {
2977                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2978                                 {
2979                                         this->InitAES(x->EncryptionKey,sserv);
2980                                 }
2981                         }
2982
2983                         return true;
2984                 }
2985                 else if ((this->ctx_in) && (command == "AES"))
2986                 {
2987                         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());
2988                 }
2989
2990                 switch (this->LinkState)
2991                 {
2992                         TreeServer* Node;
2993
2994                         case WAIT_AUTH_1:
2995                                 // Waiting for SERVER command from remote server. Server initiating
2996                                 // the connection sends the first SERVER command, listening server
2997                                 // replies with theirs if its happy, then if the initiator is happy,
2998                                 // it starts to send its net sync, which starts the merge, otherwise
2999                                 // it sends an ERROR.
3000                                 if (command == "PASS")
3001                                 {
3002                                         /* Silently ignored */
3003                                 }
3004                                 else if (command == "SERVER")
3005                                 {
3006                                         return this->Inbound_Server(params);
3007                                 }
3008                                 else if (command == "ERROR")
3009                                 {
3010                                         return this->Error(params);
3011                                 }
3012                                 else if (command == "USER")
3013                                 {
3014                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
3015                                         return false;
3016                                 }
3017                                 else if (command == "CAPAB")
3018                                 {
3019                                         return this->Capab(params);
3020                                 }
3021                                 else if ((command == "U") || (command == "S"))
3022                                 {
3023                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3024                                         return false;
3025                                 }
3026                                 else
3027                                 {
3028                                         std::string error("ERROR :Invalid command in negotiation phase: ");
3029                                         error.append(command.c_str());
3030                                         this->WriteLine(error);
3031                                         return false;
3032                                 }
3033                         break;
3034                         case WAIT_AUTH_2:
3035                                 // Waiting for start of other side's netmerge to say they liked our
3036                                 // password.
3037                                 if (command == "SERVER")
3038                                 {
3039                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
3040                                         // silently ignore.
3041                                         return true;
3042                                 }
3043                                 else if ((command == "U") || (command == "S"))
3044                                 {
3045                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3046                                         return false;
3047                                 }
3048                                 else if (command == "BURST")
3049                                 {
3050                                         if (params.size())
3051                                         {
3052                                                 /* If a time stamp is provided, try and check syncronization */
3053                                                 time_t THEM = atoi(params[0].c_str());
3054                                                 long delta = THEM-time(NULL);
3055                                                 if ((delta < -600) || (delta > 600))
3056                                                 {
3057                                                         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));
3058                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
3059                                                         return false;
3060                                                 }
3061                                                 else if ((delta < -60) || (delta > 60))
3062                                                 {
3063                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
3064                                                 }
3065                                         }
3066                                         this->LinkState = CONNECTED;
3067                                         Node = new TreeServer(this->Utils,this->Instance,InboundServerName,InboundDescription,Utils->TreeRoot,this);
3068                                         Utils->TreeRoot->AddChild(Node);
3069                                         params.clear();
3070                                         params.push_back(InboundServerName);
3071                                         params.push_back("*");
3072                                         params.push_back("1");
3073                                         params.push_back(":"+InboundDescription);
3074                                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
3075                                         this->bursting = true;
3076                                         this->DoBurst(Node);
3077                                 }
3078                                 else if (command == "ERROR")
3079                                 {
3080                                         return this->Error(params);
3081                                 }
3082                                 else if (command == "CAPAB")
3083                                 {
3084                                         return this->Capab(params);
3085                                 }
3086
3087                         break;
3088                         case LISTENER:
3089                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
3090                                 return false;
3091                         break;
3092                         case CONNECTING:
3093                                 if (command == "SERVER")
3094                                 {
3095                                         // another server we connected to, which was in WAIT_AUTH_1 state,
3096                                         // has just sent us their credentials. If we get this far, theyre
3097                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
3098                                         // if we're happy with this, we should send our netburst which
3099                                         // kickstarts the merge.
3100                                         return this->Outbound_Reply_Server(params);
3101                                 }
3102                                 else if (command == "ERROR")
3103                                 {
3104                                         return this->Error(params);
3105                                 }
3106                         break;
3107                         case CONNECTED:
3108                                 // This is the 'authenticated' state, when all passwords
3109                                 // have been exchanged and anything past this point is taken
3110                                 // as gospel.
3111
3112                                 if (prefix != "")
3113                                 {
3114                                         std::string direction = prefix;
3115                                         userrec* t = this->Instance->FindNick(prefix);
3116                                         if (t)
3117                                         {
3118                                                 direction = t->server;
3119                                         }
3120                                         TreeServer* route_back_again = Utils->BestRouteTo(direction);
3121                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3122                                         {
3123                                                 if (route_back_again)
3124                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3125                                                 return true;
3126                                         }
3127
3128                                         /* Fix by brain:
3129                                          * When there is activity on the socket, reset the ping counter so
3130                                          * that we're not wasting bandwidth pinging an active server.
3131                                          */
3132                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3133                                         route_back_again->SetPingFlag();
3134                                 }
3135
3136                                 if (command == "SVSMODE")
3137                                 {
3138                                         /* Services expects us to implement
3139                                          * SVSMODE. In inspircd its the same as
3140                                          * MODE anyway.
3141                                          */
3142                                         command = "MODE";
3143                                 }
3144                                 std::string target = "";
3145                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3146                                  * working with std::string here.
3147                                  */
3148                                 if ((command == "NICK") && (params.size() > 1))
3149                                 {
3150                                         return this->IntroduceClient(prefix,params);
3151                                 }
3152                                 else if (command == "FJOIN")
3153                                 {
3154                                         return this->ForceJoin(prefix,params);
3155                                 }
3156                                 else if (command == "STATS")
3157                                 {
3158                                         return this->Stats(prefix, params);
3159                                 }
3160                                 else if (command == "MOTD")
3161                                 {
3162                                         return this->Motd(prefix, params);
3163                                 }
3164                                 else if (command == "ADMIN")
3165                                 {
3166                                         return this->Admin(prefix, params);
3167                                 }
3168                                 else if (command == "SERVER")
3169                                 {
3170                                         return this->RemoteServer(prefix,params);
3171                                 }
3172                                 else if (command == "ERROR")
3173                                 {
3174                                         return this->Error(params);
3175                                 }
3176                                 else if (command == "OPERTYPE")
3177                                 {
3178                                         return this->OperType(prefix,params);
3179                                 }
3180                                 else if (command == "FMODE")
3181                                 {
3182                                         return this->ForceMode(prefix,params);
3183                                 }
3184                                 else if (command == "KILL")
3185                                 {
3186                                         return this->RemoteKill(prefix,params);
3187                                 }
3188                                 else if (command == "FTOPIC")
3189                                 {
3190                                         return this->ForceTopic(prefix,params);
3191                                 }
3192                                 else if (command == "REHASH")
3193                                 {
3194                                         return this->RemoteRehash(prefix,params);
3195                                 }
3196                                 else if (command == "METADATA")
3197                                 {
3198                                         return this->MetaData(prefix,params);
3199                                 }
3200                                 else if (command == "REMSTATUS")
3201                                 {
3202                                         return this->RemoveStatus(prefix,params);
3203                                 }
3204                                 else if (command == "PING")
3205                                 {
3206                                         /*
3207                                          * We just got a ping from a server that's bursting.
3208                                          * This can't be right, so set them to not bursting, and
3209                                          * apply their lines.
3210                                          */
3211                                         if (this->bursting)
3212                                         {
3213                                                 this->bursting = false;
3214                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3215                                         }
3216                                         if (prefix == "")
3217                                         {
3218                                                 prefix = this->GetName();
3219                                         }
3220                                         return this->LocalPing(prefix,params);
3221                                 }
3222                                 else if (command == "PONG")
3223                                 {
3224                                         /*
3225                                          * We just got a pong from a server that's bursting.
3226                                          * This can't be right, so set them to not bursting, and
3227                                          * apply their lines.
3228                                          */
3229                                         if (this->bursting)
3230                                         {
3231                                                 this->bursting = false;
3232                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3233                                         }
3234                                         if (prefix == "")
3235                                         {
3236                                                 prefix = this->GetName();
3237                                         }
3238                                         return this->LocalPong(prefix,params);
3239                                 }
3240                                 else if (command == "VERSION")
3241                                 {
3242                                         return this->ServerVersion(prefix,params);
3243                                 }
3244                                 else if (command == "FHOST")
3245                                 {
3246                                         return this->ChangeHost(prefix,params);
3247                                 }
3248                                 else if (command == "FNAME")
3249                                 {
3250                                         return this->ChangeName(prefix,params);
3251                                 }
3252                                 else if (command == "ADDLINE")
3253                                 {
3254                                         return this->AddLine(prefix,params);
3255                                 }
3256                                 else if (command == "SVSNICK")
3257                                 {
3258                                         if (prefix == "")
3259                                         {
3260                                                 prefix = this->GetName();
3261                                         }
3262                                         return this->ForceNick(prefix,params);
3263                                 }
3264                                 else if (command == "IDLE")
3265                                 {
3266                                         return this->Whois(prefix,params);
3267                                 }
3268                                 else if (command == "PUSH")
3269                                 {
3270                                         return this->Push(prefix,params);
3271                                 }
3272                                 else if (command == "TIME")
3273                                 {
3274                                         return this->Time(prefix,params);
3275                                 }
3276                                 else if ((command == "KICK") && (Utils->IsServer(prefix)))
3277                                 {
3278                                         std::string sourceserv = this->myhost;
3279                                         if (params.size() == 3)
3280                                         {
3281                                                 userrec* user = this->Instance->FindNick(params[1]);
3282                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3283                                                 if (user && chan)
3284                                                 {
3285                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3286                                                                 /* Yikes, the channels gone! */
3287                                                                 delete chan;
3288                                                 }
3289                                         }
3290                                         if (this->InboundServerName != "")
3291                                         {
3292                                                 sourceserv = this->InboundServerName;
3293                                         }
3294                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3295                                 }
3296                                 else if (command == "SVSJOIN")
3297                                 {
3298                                         if (prefix == "")
3299                                         {
3300                                                 prefix = this->GetName();
3301                                         }
3302                                         return this->ServiceJoin(prefix,params);
3303                                 }
3304                                 else if (command == "SQUIT")
3305                                 {
3306                                         if (params.size() == 2)
3307                                         {
3308                                                 this->Squit(Utils->FindServer(params[0]),params[1]);
3309                                         }
3310                                         return true;
3311                                 }
3312                                 else if (command == "ENDBURST")
3313                                 {
3314                                         this->bursting = false;
3315                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3316                                         std::string sourceserv = this->myhost;
3317                                         if (this->InboundServerName != "")
3318                                         {
3319                                                 sourceserv = this->InboundServerName;
3320                                         }
3321                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3322                                         return true;
3323                                 }
3324                                 else
3325                                 {
3326                                         // not a special inter-server command.
3327                                         // Emulate the actual user doing the command,
3328                                         // this saves us having a huge ugly parser.
3329                                         userrec* who = this->Instance->FindNick(prefix);
3330                                         std::string sourceserv = this->myhost;
3331                                         if (this->InboundServerName != "")
3332                                         {
3333                                                 sourceserv = this->InboundServerName;
3334                                         }
3335                                         if (who)
3336                                         {
3337                                                 if ((command == "NICK") && (params.size() > 0))
3338                                                 {
3339                                                         /* On nick messages, check that the nick doesnt
3340                                                          * already exist here. If it does, kill their copy,
3341                                                          * and our copy.
3342                                                          */
3343                                                         userrec* x = this->Instance->FindNick(params[0]);
3344                                                         if ((x) && (x != who))
3345                                                         {
3346                                                                 std::deque<std::string> p;
3347                                                                 p.push_back(params[0]);
3348                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3349                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3350                                                                 p.clear();
3351                                                                 p.push_back(prefix);
3352                                                                 p.push_back("Nickname collision");
3353                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3354                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3355                                                                 userrec* y = this->Instance->FindNick(prefix);
3356                                                                 if (y)
3357                                                                 {
3358                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3359                                                                 }
3360                                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3361                                                         }
3362                                                 }
3363                                                 // its a user
3364                                                 target = who->server;
3365                                                 const char* strparams[127];
3366                                                 for (unsigned int q = 0; q < params.size(); q++)
3367                                                 {
3368                                                         strparams[q] = params[q].c_str();
3369                                                 }
3370                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3371                                                 {
3372                                                         case CMD_INVALID:
3373                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3374                                                                 return false;
3375                                                         break;
3376                                                         case CMD_FAILURE:
3377                                                                 return true;
3378                                                         break;
3379                                                         default:
3380                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3381                                                         break;
3382                                                 }
3383                                         }
3384                                         else
3385                                         {
3386                                                 // its not a user. Its either a server, or somethings screwed up.
3387                                                 if (Utils->IsServer(prefix))
3388                                                 {
3389                                                         target = this->Instance->Config->ServerName;
3390                                                 }
3391                                                 else
3392                                                 {
3393                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3394                                                         return true;
3395                                                 }
3396                                         }
3397                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3398
3399                                 }
3400                                 return true;
3401                         break;
3402                 }
3403                 return true;
3404         }
3405
3406         virtual std::string GetName()
3407         {
3408                 std::string sourceserv = this->myhost;
3409                 if (this->InboundServerName != "")
3410                 {
3411                         sourceserv = this->InboundServerName;
3412                 }
3413                 return sourceserv;
3414         }
3415
3416         virtual void OnTimeout()
3417         {
3418                 if (this->LinkState == CONNECTING)
3419                 {
3420                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3421                         Link* MyLink = Utils->FindLink(myhost);
3422                         if (MyLink)
3423                                 Utils->DoFailOver(MyLink);
3424                 }
3425         }
3426
3427         virtual void OnClose()
3428         {
3429                 // Connection closed.
3430                 // If the connection is fully up (state CONNECTED)
3431                 // then propogate a netsplit to all peers.
3432                 std::string quitserver = this->myhost;
3433                 if (this->InboundServerName != "")
3434                 {
3435                         quitserver = this->InboundServerName;
3436                 }
3437                 TreeServer* s = Utils->FindServer(quitserver);
3438                 if (s)
3439                 {
3440                         Squit(s,"Remote host closed the connection");
3441                 }
3442                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3443         }
3444
3445         virtual int OnIncomingConnection(int newsock, char* ip)
3446         {
3447                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3448                  * or discovering if this port is the server port, we don't allow connections from any
3449                  * IPs for which we don't have a link block.
3450                  */
3451                 bool found = false;
3452
3453                 found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
3454                 if (!found)
3455                 {
3456                         for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
3457                                 if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
3458                                         found = true;
3459
3460                         if (!found)
3461                         {
3462                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3463                                 close(newsock);
3464                                 return false;
3465                         }
3466                 }
3467                 TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip);
3468                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3469                 return true;
3470         }
3471 };
3472
3473 /** This class is used to resolve server hostnames during /connect and autoconnect.
3474  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3475  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3476  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3477  * will have an IP address which we can then use to continue our connection.
3478  */
3479 class ServernameResolver : public Resolver
3480 {
3481  private:
3482         /** A copy of the Link tag info for what we're connecting to.
3483          * We take a copy, rather than using a pointer, just in case the
3484          * admin takes the tag away and rehashes while the domain is resolving.
3485          */
3486         Link MyLink;
3487         SpanningTreeUtilities* Utils;
3488  public:
3489         ServernameResolver(SpanningTreeUtilities* Util, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x), Utils(Util)
3490         {
3491                 /* Nothing in here, folks */
3492         }
3493
3494         void OnLookupComplete(const std::string &result)
3495         {
3496                 /* Initiate the connection, now that we have an IP to use.
3497                  * Passing a hostname directly to InspSocket causes it to
3498                  * just bail and set its FD to -1.
3499                  */
3500                 TreeServer* CheckDupe = Utils->FindServer(MyLink.Name.c_str());
3501                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3502                 {
3503                         TreeSocket* newsocket = new TreeSocket(this->Utils, ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3504                         if (newsocket->GetFd() > -1)
3505                         {
3506                                 /* We're all OK */
3507                         }
3508                         else
3509                         {
3510                                 /* Something barfed, show the opers */
3511                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3512                                 delete newsocket;
3513                                 Utils->DoFailOver(&MyLink);
3514                         }
3515                 }
3516         }
3517
3518         void OnError(ResolverError e, const std::string &errormessage)
3519         {
3520                 /* Ooops! */
3521                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3522                 Utils->DoFailOver(&MyLink);
3523         }
3524 };
3525
3526 /** Handle resolving of server IPs for the cache
3527  */
3528 class SecurityIPResolver : public Resolver
3529 {
3530  private:
3531         Link MyLink;
3532         SpanningTreeUtilities* Utils;
3533  public:
3534         SecurityIPResolver(SpanningTreeUtilities* U, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x), Utils(U)
3535         {
3536         }
3537
3538         void OnLookupComplete(const std::string &result)
3539         {
3540                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3541                 Utils->ValidIPs.push_back(result);
3542         }
3543
3544         void OnError(ResolverError e, const std::string &errormessage)
3545         {
3546                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3547         }
3548 };
3549
3550 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
3551 {
3552         Bindings.clear();
3553         this->ReadConfiguration(true);
3554         this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3555 }
3556
3557 SpanningTreeUtilities::~SpanningTreeUtilities()
3558 {
3559         for (unsigned int i = 0; i < Bindings.size(); i++)
3560         {
3561                 ServerInstance->Log(DEBUG,"Freeing binding %d of %d",i, Bindings.size());
3562                 ServerInstance->SE->DelFd(Bindings[i]);
3563                 Bindings[i]->Close();
3564                 DELETE(Bindings[i]);
3565         }
3566         ServerInstance->Log(DEBUG,"Freeing connected servers...");
3567         while (TreeRoot->ChildCount())
3568         {
3569                 TreeServer* child_server = TreeRoot->GetChild(0);
3570                 ServerInstance->Log(DEBUG,"Freeing connected server %s", child_server->GetName().c_str());
3571                 if (child_server)
3572                 {
3573                         TreeSocket* sock = child_server->GetSocket();
3574                         ServerInstance->SE->DelFd(sock);
3575                         sock->Close();
3576                         DELETE(sock);
3577                 }
3578         }
3579         delete TreeRoot;
3580 }
3581
3582 void SpanningTreeUtilities::AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3583 {
3584         for (unsigned int c = 0; c < list.size(); c++)
3585         {
3586                 if (list[c] == server)
3587                 {
3588                         return;
3589                 }
3590         }
3591         list.push_back(server);
3592 }
3593
3594 /** returns a list of DIRECT servernames for a specific channel */
3595 void SpanningTreeUtilities::GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3596 {
3597         CUList *ulist = c->GetUsers();
3598         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3599         {
3600                 if (i->second->GetFd() < 0)
3601                 {
3602                         TreeServer* best = this->BestRouteTo(i->second->server);
3603                         if (best)
3604                                 AddThisServer(best,list);
3605                 }
3606         }
3607         return;
3608 }
3609
3610 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params)
3611 {
3612         TreeServer* omitroute = this->BestRouteTo(omit);
3613         if ((command == "NOTICE") || (command == "PRIVMSG"))
3614         {
3615                 if (params.size() >= 2)
3616                 {
3617                         /* Prefixes */
3618                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3619                         {
3620                                 params[0] = params[0].substr(1, params[0].length()-1);
3621                         }
3622                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3623                         {
3624                                 // special routing for private messages/notices
3625                                 userrec* d = ServerInstance->FindNick(params[0]);
3626                                 if (d)
3627                                 {
3628                                         std::deque<std::string> par;
3629                                         par.push_back(params[0]);
3630                                         par.push_back(":"+params[1]);
3631                                         this->DoOneToOne(prefix,command.c_str(),par,d->server);
3632                                         return true;
3633                                 }
3634                         }
3635                         else if (*(params[0].c_str()) == '$')
3636                         {
3637                                 std::deque<std::string> par;
3638                                 par.push_back(params[0]);
3639                                 par.push_back(":"+params[1]);
3640                                 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3641                                 return true;
3642                         }
3643                         else
3644                         {
3645                                 chanrec* c = ServerInstance->FindChan(params[0]);
3646                                 if (c)
3647                                 {
3648                                         std::deque<TreeServer*> list;
3649                                         GetListOfServersForChannel(c,list);
3650                                         unsigned int lsize = list.size();
3651                                         for (unsigned int i = 0; i < lsize; i++)
3652                                         {
3653                                                 TreeSocket* Sock = list[i]->GetSocket();
3654                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3655                                                 {
3656                                                         Sock->WriteLine(data);
3657                                                 }
3658                                         }
3659                                         return true;
3660                                 }
3661                         }
3662                 }
3663         }
3664         unsigned int items =this->TreeRoot->ChildCount();
3665         for (unsigned int x = 0; x < items; x++)
3666         {
3667                 TreeServer* Route = this->TreeRoot->GetChild(x);
3668                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3669                 {
3670                         TreeSocket* Sock = Route->GetSocket();
3671                         if (Sock)
3672                                 Sock->WriteLine(data);
3673                 }
3674         }
3675         return true;
3676 }
3677
3678 bool SpanningTreeUtilities::DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit)
3679 {
3680         TreeServer* omitroute = this->BestRouteTo(omit);
3681         std::string FullLine = ":" + prefix + " " + command;
3682         unsigned int words = params.size();
3683         for (unsigned int x = 0; x < words; x++)
3684         {
3685                 FullLine = FullLine + " " + params[x];
3686         }
3687         unsigned int items = this->TreeRoot->ChildCount();
3688         for (unsigned int x = 0; x < items; x++)
3689         {
3690                 TreeServer* Route = this->TreeRoot->GetChild(x);
3691                 // Send the line IF:
3692                 // The route has a socket (its a direct connection)
3693                 // The route isnt the one to be omitted
3694                 // The route isnt the path to the one to be omitted
3695                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3696                 {
3697                         TreeSocket* Sock = Route->GetSocket();
3698                         if (Sock)
3699                                 Sock->WriteLine(FullLine);
3700                 }
3701         }
3702         return true;
3703 }
3704
3705 bool SpanningTreeUtilities::DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params)
3706 {
3707         std::string FullLine = ":" + prefix + " " + command;
3708         unsigned int words = params.size();
3709         for (unsigned int x = 0; x < words; x++)
3710         {
3711                 FullLine = FullLine + " " + params[x];
3712         }
3713         unsigned int items = this->TreeRoot->ChildCount();
3714         for (unsigned int x = 0; x < items; x++)
3715         {
3716                 TreeServer* Route = this->TreeRoot->GetChild(x);
3717                 if (Route && Route->GetSocket())
3718                 {
3719                         TreeSocket* Sock = Route->GetSocket();
3720                         if (Sock)
3721                                 Sock->WriteLine(FullLine);
3722                 }
3723         }
3724         return true;
3725 }
3726
3727 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3728 {
3729         std::string spfx = prefix;
3730         std::string scmd = command;
3731         return this->DoOneToMany(spfx, scmd, params);
3732 }
3733
3734 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3735 {
3736         std::string spfx = prefix;
3737         std::string scmd = command;
3738         return this->DoOneToAllButSender(spfx, scmd, params, omit);
3739 }
3740
3741 bool SpanningTreeUtilities::DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target)
3742 {
3743         TreeServer* Route = this->BestRouteTo(target);
3744         if (Route)
3745         {
3746                 std::string FullLine = ":" + prefix + " " + command;
3747                 unsigned int words = params.size();
3748                 for (unsigned int x = 0; x < words; x++)
3749                 {
3750                         FullLine = FullLine + " " + params[x];
3751                 }
3752                 if (Route && Route->GetSocket())
3753                 {
3754                         TreeSocket* Sock = Route->GetSocket();
3755                         if (Sock)
3756                                 Sock->WriteLine(FullLine);
3757                 }
3758                 return true;
3759         }
3760         else
3761         {
3762                 return false;
3763         }
3764 }
3765
3766 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
3767 {
3768         ConfigReader* Conf = new ConfigReader(ServerInstance);
3769         if (rebind)
3770         {
3771                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3772                 {
3773                         std::string Type = Conf->ReadValue("bind","type",j);
3774                         std::string IP = Conf->ReadValue("bind","address",j);
3775                         int Port = Conf->ReadInteger("bind","port",j,true);
3776                         if (Type == "servers")
3777                         {
3778                                 ServerInstance->Log(DEBUG,"m_spanningtree: Binding server port %s:%d", IP.c_str(), Port);
3779                                 if (IP == "*")
3780                                 {
3781                                         IP = "";
3782                                 }
3783                                 TreeSocket* listener = new TreeSocket(this, ServerInstance, IP.c_str(),Port,true,10);
3784                                 if (listener->GetState() == I_LISTENING)
3785                                 {
3786                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), Port);
3787                                         Bindings.push_back(listener);
3788                                 }
3789                                 else
3790                                 {
3791                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3792                                         listener->Close();
3793                                         DELETE(listener);
3794                                 }
3795                                 ServerInstance->Log(DEBUG,"Done with this binding");
3796                         }
3797                 }
3798         }
3799         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3800         HideULines = Conf->ReadFlag("options","hideulines",0);
3801         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
3802         LinkBlocks.clear();
3803         ValidIPs.clear();
3804         for (int j =0; j < Conf->Enumerate("link"); j++)
3805         {
3806                 Link L;
3807                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3808                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3809                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3810                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3811                 L.Port = Conf->ReadInteger("link","port",j,true);
3812                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3813                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3814                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3815                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3816                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3817                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3818                 /* Bugfix by brain, do not allow people to enter bad configurations */
3819                 if (L.Name != ServerInstance->Config->ServerName)
3820                 {
3821                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3822                         {
3823                                 ValidIPs.push_back(L.IPAddr);
3824
3825                                 if (Allow.length())
3826                                         ValidIPs.push_back(Allow);
3827
3828                                 /* Needs resolving */
3829                                 insp_inaddr binip;
3830                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3831                                 {
3832                                         try
3833                                         {
3834                                                 SecurityIPResolver* sr = new SecurityIPResolver(this, ServerInstance, L.IPAddr, L);
3835                                                 ServerInstance->AddResolver(sr);
3836                                         }
3837                                         catch (ModuleException& e)
3838                                         {
3839                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3840                                         }
3841                                 }
3842
3843                                 LinkBlocks.push_back(L);
3844                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3845                         }
3846                         else
3847                         {
3848                                 if (L.IPAddr == "")
3849                                 {
3850                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3851                                 }
3852                                 else if (L.RecvPass == "")
3853                                 {
3854                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3855                                 }
3856                                 else if (L.SendPass == "")
3857                                 {
3858                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3859                                 }
3860                                 else if (L.Name == "")
3861                                 {
3862                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3863                                 }
3864                                 else if (!L.Port)
3865                                 {
3866                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3867                                 }
3868                         }
3869                 }
3870                 else
3871                 {
3872                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3873                 }
3874         }
3875         DELETE(Conf);
3876 }
3877
3878
3879
3880 class ModuleSpanningTree : public Module
3881 {
3882         int line;
3883         int NumServers;
3884         unsigned int max_local;
3885         unsigned int max_global;
3886         cmd_rconnect* command_rconnect;
3887         SpanningTreeUtilities* Utils;
3888
3889  public:
3890
3891         ModuleSpanningTree(InspIRCd* Me)
3892                 : Module::Module(Me), max_local(0), max_global(0)
3893         {
3894                 Utils = new SpanningTreeUtilities(Me, this);
3895
3896                 command_rconnect = new cmd_rconnect(ServerInstance, this, Utils);
3897                 ServerInstance->AddCommand(command_rconnect);
3898         }
3899
3900         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3901         {
3902                 std::string Parent = Utils->TreeRoot->GetName();
3903                 if (Current->GetParent())
3904                 {
3905                         Parent = Current->GetParent()->GetName();
3906                 }
3907                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3908                 {
3909                         if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3910                         {
3911                                 if (*user->oper)
3912                                 {
3913                                          ShowLinks(Current->GetChild(q),user,hops+1);
3914                                 }
3915                         }
3916                         else
3917                         {
3918                                 ShowLinks(Current->GetChild(q),user,hops+1);
3919                         }
3920                 }
3921                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3922                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3923                         return;
3924                 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());
3925         }
3926
3927         int CountLocalServs()
3928         {
3929                 return Utils->TreeRoot->ChildCount();
3930         }
3931
3932         int CountServs()
3933         {
3934                 return Utils->serverlist.size();
3935         }
3936
3937         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3938         {
3939                 ShowLinks(Utils->TreeRoot,user,0);
3940                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3941                 return;
3942         }
3943
3944         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3945         {
3946                 unsigned int n_users = ServerInstance->UserCount();
3947
3948                 /* Only update these when someone wants to see them, more efficient */
3949                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3950                         max_local = ServerInstance->LocalUserCount();
3951                 if (n_users > max_global)
3952                         max_global = n_users;
3953
3954                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3955                 if (ServerInstance->OperCount())
3956                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3957                 if (ServerInstance->UnregisteredUserCount())
3958                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3959                 if (ServerInstance->ChannelCount())
3960                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3961                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3962                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3963                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3964                 return;
3965         }
3966
3967         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3968
3969         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3970         {
3971                 if (line < 128)
3972                 {
3973                         for (int t = 0; t < depth; t++)
3974                         {
3975                                 matrix[line][t] = ' ';
3976                         }
3977
3978                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3979                         // a 'Spacer' String to compensate.
3980                         char spacer[40];
3981
3982                         memset(spacer,' ',40);
3983                         if ((40 - Current->GetName().length() - depth) > 1) {
3984                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3985                         }
3986                         else
3987                         {
3988                                 spacer[5] = '\0';
3989                         }
3990
3991                         float percent;
3992                         char text[80];
3993                         if (ServerInstance->clientlist.size() == 0) {
3994                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3995                                 percent = 0;
3996                         }
3997                         else
3998                         {
3999                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
4000                         }
4001                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
4002                         totusers += Current->GetUserCount();
4003                         totservers++;
4004                         strlcpy(&matrix[line][depth],text,80);
4005                         line++;
4006                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
4007                         {
4008                                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
4009                                 {
4010                                         if (*user->oper)
4011                                         {
4012                                                 ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4013                                         }
4014                                 }
4015                                 else
4016                                 {
4017                                         ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4018                                 }
4019                         }
4020                 }
4021         }
4022
4023         int HandleMotd(const char** parameters, int pcnt, userrec* user)
4024         {
4025                 if (pcnt > 0)
4026                 {
4027                         /* Remote MOTD, the server is within the 1st parameter */
4028                         std::deque<std::string> params;
4029                         params.push_back(parameters[0]);
4030
4031                         /* Send it out remotely, generate no reply yet */
4032                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4033                         if (s)
4034                         {
4035                                 Utils->DoOneToOne(user->nick, "MOTD", params, s->GetName());
4036                         }
4037                         else
4038                         {
4039                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4040                         }
4041                         return 1;
4042                 }
4043                 return 0;
4044         }
4045
4046         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
4047         {
4048                 if (pcnt > 0)
4049                 {
4050                         /* Remote ADMIN, the server is within the 1st parameter */
4051                         std::deque<std::string> params;
4052                         params.push_back(parameters[0]);
4053
4054                         /* Send it out remotely, generate no reply yet */
4055                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4056                         if (s)
4057                         {
4058                                 Utils->DoOneToOne(user->nick, "ADMIN", params, s->GetName());
4059                         }
4060                         else
4061                         {
4062                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4063                         }
4064                         return 1;
4065                 }
4066                 return 0;
4067         }
4068
4069         int HandleStats(const char** parameters, int pcnt, userrec* user)
4070         {
4071                 if (pcnt > 1)
4072                 {
4073                         /* Remote STATS, the server is within the 2nd parameter */
4074                         std::deque<std::string> params;
4075                         params.push_back(parameters[0]);
4076                         params.push_back(parameters[1]);
4077                         /* Send it out remotely, generate no reply yet */
4078                         TreeServer* s = Utils->FindServerMask(parameters[1]);
4079                         if (s)
4080                         {
4081                                 params[1] = s->GetName();
4082                                 Utils->DoOneToOne(user->nick, "STATS", params, s->GetName());
4083                         }
4084                         else
4085                         {
4086                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4087                         }
4088                         return 1;
4089                 }
4090                 return 0;
4091         }
4092
4093         // Ok, prepare to be confused.
4094         // After much mulling over how to approach this, it struck me that
4095         // the 'usual' way of doing a /MAP isnt the best way. Instead of
4096         // keeping track of a ton of ascii characters, and line by line
4097         // under recursion working out where to place them using multiplications
4098         // and divisons, we instead render the map onto a backplane of characters
4099         // (a character matrix), then draw the branches as a series of "L" shapes
4100         // from the nodes. This is not only friendlier on CPU it uses less stack.
4101
4102         void HandleMap(const char** parameters, int pcnt, userrec* user)
4103         {
4104                 // This array represents a virtual screen which we will
4105                 // "scratch" draw to, as the console device of an irc
4106                 // client does not provide for a proper terminal.
4107                 float totusers = 0;
4108                 float totservers = 0;
4109                 char matrix[128][80];
4110                 for (unsigned int t = 0; t < 128; t++)
4111                 {
4112                         matrix[t][0] = '\0';
4113                 }
4114                 line = 0;
4115                 // The only recursive bit is called here.
4116                 ShowMap(Utils->TreeRoot,user,0,matrix,totusers,totservers);
4117                 // Process each line one by one. The algorithm has a limit of
4118                 // 128 servers (which is far more than a spanning tree should have
4119                 // anyway, so we're ok). This limit can be raised simply by making
4120                 // the character matrix deeper, 128 rows taking 10k of memory.
4121                 for (int l = 1; l < line; l++)
4122                 {
4123                         // scan across the line looking for the start of the
4124                         // servername (the recursive part of the algorithm has placed
4125                         // the servers at indented positions depending on what they
4126                         // are related to)
4127                         int first_nonspace = 0;
4128                         while (matrix[l][first_nonspace] == ' ')
4129                         {
4130                                 first_nonspace++;
4131                         }
4132                         first_nonspace--;
4133                         // Draw the `- (corner) section: this may be overwritten by
4134                         // another L shape passing along the same vertical pane, becoming
4135                         // a |- (branch) section instead.
4136                         matrix[l][first_nonspace] = '-';
4137                         matrix[l][first_nonspace-1] = '`';
4138                         int l2 = l - 1;
4139                         // Draw upwards until we hit the parent server, causing possibly
4140                         // other corners (`-) to become branches (|-)
4141                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
4142                         {
4143                                 matrix[l2][first_nonspace-1] = '|';
4144                                 l2--;
4145                         }
4146                 }
4147                 // dump the whole lot to the user. This is the easy bit, honest.
4148                 for (int t = 0; t < line; t++)
4149                 {
4150                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4151                 }
4152                 float avg_users = totusers / totservers;
4153                 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);
4154         user->WriteServ("007 %s :End of /MAP",user->nick);
4155                 return;
4156         }
4157
4158         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4159         {
4160                 TreeServer* s = Utils->FindServerMask(parameters[0]);
4161                 if (s)
4162                 {
4163                         if (s == Utils->TreeRoot)
4164                         {
4165                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4166                                 return 1;
4167                         }
4168                         TreeSocket* sock = s->GetSocket();
4169                         if (sock)
4170                         {
4171                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4172                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4173                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
4174                                 ServerInstance->SE->DelFd(sock);
4175                                 sock->Close();
4176                                 delete sock;
4177                         }
4178                         else
4179                         {
4180                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
4181                         }
4182                 }
4183                 else
4184                 {
4185                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4186                 }
4187                 return 1;
4188         }
4189
4190         int HandleTime(const char** parameters, int pcnt, userrec* user)
4191         {
4192                 if ((IS_LOCAL(user)) && (pcnt))
4193                 {
4194                         TreeServer* found = Utils->FindServerMask(parameters[0]);
4195                         if (found)
4196                         {
4197                                 // we dont' override for local server
4198                                 if (found == Utils->TreeRoot)
4199                                         return 0;
4200
4201                                 std::deque<std::string> params;
4202                                 params.push_back(found->GetName());
4203                                 params.push_back(user->nick);
4204                                 Utils->DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4205                         }
4206                         else
4207                         {
4208                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4209                         }
4210                 }
4211                 return 1;
4212         }
4213
4214         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4215         {
4216                 if ((IS_LOCAL(user)) && (pcnt > 1))
4217                 {
4218                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4219                         if ((remote) && (remote->GetFd() < 0))
4220                         {
4221                                 std::deque<std::string> params;
4222                                 params.push_back(parameters[1]);
4223                                 Utils->DoOneToOne(user->nick,"IDLE",params,remote->server);
4224                                 return 1;
4225                         }
4226                         else if (!remote)
4227                         {
4228                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4229                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4230                                 return 1;
4231                         }
4232                 }
4233                 return 0;
4234         }
4235
4236         void DoPingChecks(time_t curtime)
4237         {
4238                 for (unsigned int j = 0; j < Utils->TreeRoot->ChildCount(); j++)
4239                 {
4240                         TreeServer* serv = Utils->TreeRoot->GetChild(j);
4241                         TreeSocket* sock = serv->GetSocket();
4242                         if (sock)
4243                         {
4244                                 if (curtime >= serv->NextPingTime())
4245                                 {
4246                                         if (serv->AnsweredLastPing())
4247                                         {
4248                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4249                                                 serv->SetNextPingTime(curtime + 60);
4250                                         }
4251                                         else
4252                                         {
4253                                                 // they didnt answer, boot them
4254                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4255                                                 sock->Squit(serv,"Ping timeout");
4256                                                 ServerInstance->SE->DelFd(sock);
4257                                                 sock->Close();
4258                                                 delete sock;
4259                                                 return;
4260                                         }
4261                                 }
4262                         }
4263                 }
4264         }
4265
4266         void ConnectServer(Link* x)
4267         {
4268                 insp_inaddr binip;
4269
4270                 /* Do we already have an IP? If so, no need to resolve it. */
4271                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4272                 {
4273                         TreeSocket* newsocket = new TreeSocket(Utils, ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4274                         if (newsocket->GetFd() > -1)
4275                         {
4276                                 /* Handled automatically on success */
4277                         }
4278                         else
4279                         {
4280                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4281                                 delete newsocket;
4282                                 Utils->DoFailOver(x);
4283                         }
4284                 }
4285                 else
4286                 {
4287                         try
4288                         {
4289                                 ServernameResolver* snr = new ServernameResolver(Utils, ServerInstance,x->IPAddr, *x);
4290                                 ServerInstance->AddResolver(snr);
4291                         }
4292                         catch (ModuleException& e)
4293                         {
4294                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4295                                 Utils->DoFailOver(x);
4296                         }
4297                 }
4298         }
4299
4300         void AutoConnectServers(time_t curtime)
4301         {
4302                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4303                 {
4304                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4305                         {
4306                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4307                                 x->NextConnectTime = curtime + x->AutoConnect;
4308                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4309                                 if (x->FailOver.length())
4310                                 {
4311                                         TreeServer* CheckFailOver = Utils->FindServer(x->FailOver.c_str());
4312                                         if (CheckFailOver)
4313                                         {
4314                                                 /* The failover for this server is currently a member of the network.
4315                                                  * The failover probably succeeded, where the main link did not.
4316                                                  * Don't try the main link until the failover is gone again.
4317                                                  */
4318                                                 continue;
4319                                         }
4320                                 }
4321                                 if (!CheckDupe)
4322                                 {
4323                                         // an autoconnected server is not connected. Check if its time to connect it
4324                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4325                                         this->ConnectServer(&(*x));
4326                                 }
4327                         }
4328                 }
4329         }
4330
4331         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4332         {
4333                 // we've already checked if pcnt > 0, so this is safe
4334                 TreeServer* found = Utils->FindServerMask(parameters[0]);
4335                 if (found)
4336                 {
4337                         std::string Version = found->GetVersion();
4338                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4339                         if (found == Utils->TreeRoot)
4340                         {
4341                                 std::stringstream out(ServerInstance->Config->data005);
4342                                 std::string token = "";
4343                                 std::string line5 = "";
4344                                 int token_counter = 0;
4345
4346                                 while (!out.eof())
4347                                 {
4348                                         out >> token;
4349                                         line5 = line5 + token + " ";
4350                                         token_counter++;
4351
4352                                         if ((token_counter >= 13) || (out.eof() == true))
4353                                         {
4354                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4355                                                 line5 = "";
4356                                                 token_counter = 0;
4357                                         }
4358                                 }
4359                         }
4360                 }
4361                 else
4362                 {
4363                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4364                 }
4365                 return 1;
4366         }
4367
4368         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4369         {
4370                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4371                 {
4372                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4373                         {
4374                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4375                                 if (!CheckDupe)
4376                                 {
4377                                         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);
4378                                         ConnectServer(&(*x));
4379                                         return 1;
4380                                 }
4381                                 else
4382                                 {
4383                                         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());
4384                                         return 1;
4385                                 }
4386                         }
4387                 }
4388                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4389                 return 1;
4390         }
4391
4392         virtual int OnStats(char statschar, userrec* user, string_list &results)
4393         {
4394                 if (statschar == 'c')
4395                 {
4396                         for (unsigned int i = 0; i < Utils->LinkBlocks.size(); i++)
4397                         {
4398                                 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');
4399                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+Utils->LinkBlocks[i].Name.c_str());
4400                         }
4401                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4402                         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);
4403                         return 1;
4404                 }
4405                 return 0;
4406         }
4407
4408         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4409         {
4410                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4411                 if (!validated)
4412                         return 0;
4413
4414                 if (command == "CONNECT")
4415                 {
4416                         return this->HandleConnect(parameters,pcnt,user);
4417                 }
4418                 else if (command == "STATS")
4419                 {
4420                         return this->HandleStats(parameters,pcnt,user);
4421                 }
4422                 else if (command == "MOTD")
4423                 {
4424                         return this->HandleMotd(parameters,pcnt,user);
4425                 }
4426                 else if (command == "ADMIN")
4427                 {
4428                         return this->HandleAdmin(parameters,pcnt,user);
4429                 }
4430                 else if (command == "SQUIT")
4431                 {
4432                         return this->HandleSquit(parameters,pcnt,user);
4433                 }
4434                 else if (command == "MAP")
4435                 {
4436                         this->HandleMap(parameters,pcnt,user);
4437                         return 1;
4438                 }
4439                 else if ((command == "TIME") && (pcnt > 0))
4440                 {
4441                         return this->HandleTime(parameters,pcnt,user);
4442                 }
4443                 else if (command == "LUSERS")
4444                 {
4445                         this->HandleLusers(parameters,pcnt,user);
4446                         return 1;
4447                 }
4448                 else if (command == "LINKS")
4449                 {
4450                         this->HandleLinks(parameters,pcnt,user);
4451                         return 1;
4452                 }
4453                 else if (command == "WHOIS")
4454                 {
4455                         if (pcnt > 1)
4456                         {
4457                                 // remote whois
4458                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4459                         }
4460                 }
4461                 else if ((command == "VERSION") && (pcnt > 0))
4462                 {
4463                         this->HandleVersion(parameters,pcnt,user);
4464                         return 1;
4465                 }
4466
4467                 return 0;
4468         }
4469
4470         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4471         {
4472                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4473                 {
4474                         // this bit of code cleverly routes all module commands
4475                         // to all remote severs *automatically* so that modules
4476                         // can just handle commands locally, without having
4477                         // to have any special provision in place for remote
4478                         // commands and linking protocols.
4479                         std::deque<std::string> params;
4480                         params.clear();
4481                         for (int j = 0; j < pcnt; j++)
4482                         {
4483                                 if (strchr(parameters[j],' '))
4484                                 {
4485                                         params.push_back(":" + std::string(parameters[j]));
4486                                 }
4487                                 else
4488                                 {
4489                                         params.push_back(std::string(parameters[j]));
4490                                 }
4491                         }
4492                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4493                         Utils->DoOneToMany(user->nick,command,params);
4494                 }
4495         }
4496
4497         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4498         {
4499                 TreeServer* s = Utils->FindServer(servername);
4500                 if (s)
4501                 {
4502                         description = s->GetDesc();
4503                 }
4504         }
4505
4506         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4507         {
4508                 if (IS_LOCAL(source))
4509                 {
4510                         std::deque<std::string> params;
4511                         params.push_back(dest->nick);
4512                         params.push_back(channel->name);
4513                         Utils->DoOneToMany(source->nick,"INVITE",params);
4514                 }
4515         }
4516
4517         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4518         {
4519                 std::deque<std::string> params;
4520                 params.push_back(chan->name);
4521                 params.push_back(":"+topic);
4522                 Utils->DoOneToMany(user->nick,"TOPIC",params);
4523         }
4524
4525         virtual void OnWallops(userrec* user, const std::string &text)
4526         {
4527                 if (IS_LOCAL(user))
4528                 {
4529                         std::deque<std::string> params;
4530                         params.push_back(":"+text);
4531                         Utils->DoOneToMany(user->nick,"WALLOPS",params);
4532                 }
4533         }
4534
4535         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4536         {
4537                 if (target_type == TYPE_USER)
4538                 {
4539                         userrec* d = (userrec*)dest;
4540                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4541                         {
4542                                 std::deque<std::string> params;
4543                                 params.clear();
4544                                 params.push_back(d->nick);
4545                                 params.push_back(":"+text);
4546                                 Utils->DoOneToOne(user->nick,"NOTICE",params,d->server);
4547                         }
4548                 }
4549                 else if (target_type == TYPE_CHANNEL)
4550                 {
4551                         if (IS_LOCAL(user))
4552                         {
4553                                 chanrec *c = (chanrec*)dest;
4554                                 if (c)
4555                                 {
4556                                         std::string cname = c->name;
4557                                         if (status)
4558                                                 cname = status + cname;
4559                                         std::deque<TreeServer*> list;
4560                                         Utils->GetListOfServersForChannel(c,list);
4561                                         unsigned int ucount = list.size();
4562                                         for (unsigned int i = 0; i < ucount; i++)
4563                                         {
4564                                                 TreeSocket* Sock = list[i]->GetSocket();
4565                                                 if (Sock)
4566                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4567                                         }
4568                                 }
4569                         }
4570                 }
4571                 else if (target_type == TYPE_SERVER)
4572                 {
4573                         if (IS_LOCAL(user))
4574                         {
4575                                 char* target = (char*)dest;
4576                                 std::deque<std::string> par;
4577                                 par.push_back(target);
4578                                 par.push_back(":"+text);
4579                                 Utils->DoOneToMany(user->nick,"NOTICE",par);
4580                         }
4581                 }
4582         }
4583
4584         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4585         {
4586                 if (target_type == TYPE_USER)
4587                 {
4588                         // route private messages which are targetted at clients only to the server
4589                         // which needs to receive them
4590                         userrec* d = (userrec*)dest;
4591                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4592                         {
4593                                 std::deque<std::string> params;
4594                                 params.clear();
4595                                 params.push_back(d->nick);
4596                                 params.push_back(":"+text);
4597                                 Utils->DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4598                         }
4599                 }
4600                 else if (target_type == TYPE_CHANNEL)
4601                 {
4602                         if (IS_LOCAL(user))
4603                         {
4604                                 chanrec *c = (chanrec*)dest;
4605                                 if (c)
4606                                 {
4607                                         std::string cname = c->name;
4608                                         if (status)
4609                                                 cname = status + cname;
4610                                         std::deque<TreeServer*> list;
4611                                         Utils->GetListOfServersForChannel(c,list);
4612                                         unsigned int ucount = list.size();
4613                                         for (unsigned int i = 0; i < ucount; i++)
4614                                         {
4615                                                 TreeSocket* Sock = list[i]->GetSocket();
4616                                                 if (Sock)
4617                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4618                                         }
4619                                 }
4620                         }
4621                 }
4622                 else if (target_type == TYPE_SERVER)
4623                 {
4624                         if (IS_LOCAL(user))
4625                         {
4626                                 char* target = (char*)dest;
4627                                 std::deque<std::string> par;
4628                                 par.push_back(target);
4629                                 par.push_back(":"+text);
4630                                 Utils->DoOneToMany(user->nick,"PRIVMSG",par);
4631                         }
4632                 }
4633         }
4634
4635         virtual void OnBackgroundTimer(time_t curtime)
4636         {
4637                 AutoConnectServers(curtime);
4638                 DoPingChecks(curtime);
4639         }
4640
4641         virtual void OnUserJoin(userrec* user, chanrec* channel)
4642         {
4643                 // Only do this for local users
4644                 if (IS_LOCAL(user))
4645                 {
4646                         std::deque<std::string> params;
4647                         params.clear();
4648                         params.push_back(channel->name);
4649                         // set up their permissions and the channel TS with FJOIN.
4650                         // All users are FJOINed now, because a module may specify
4651                         // new joining permissions for the user.
4652                         params.clear();
4653                         params.push_back(channel->name);
4654                         params.push_back(ConvToStr(channel->age));
4655                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4656                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4657                 }
4658         }
4659
4660         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4661         {
4662                 // only occurs for local clients
4663                 if (user->registered != REG_ALL)
4664                         return;
4665                 std::deque<std::string> params;
4666                 params.push_back(newhost);
4667                 Utils->DoOneToMany(user->nick,"FHOST",params);
4668         }
4669
4670         virtual void OnChangeName(userrec* user, const std::string &gecos)
4671         {
4672                 // only occurs for local clients
4673                 if (user->registered != REG_ALL)
4674                         return;
4675                 std::deque<std::string> params;
4676                 params.push_back(gecos);
4677                 Utils->DoOneToMany(user->nick,"FNAME",params);
4678         }
4679
4680         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4681         {
4682                 if (IS_LOCAL(user))
4683                 {
4684                         std::deque<std::string> params;
4685                         params.push_back(channel->name);
4686                         if (partmessage != "")
4687                                 params.push_back(":"+partmessage);
4688                         Utils->DoOneToMany(user->nick,"PART",params);
4689                 }
4690         }
4691
4692         virtual void OnUserConnect(userrec* user)
4693         {
4694                 char agestr[MAXBUF];
4695                 if (IS_LOCAL(user))
4696                 {
4697                         std::deque<std::string> params;
4698                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4699                         params.push_back(agestr);
4700                         params.push_back(user->nick);
4701                         params.push_back(user->host);
4702                         params.push_back(user->dhost);
4703                         params.push_back(user->ident);
4704                         params.push_back("+"+std::string(user->FormatModes()));
4705                         params.push_back(user->GetIPString());
4706                         params.push_back(":"+std::string(user->fullname));
4707                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4708
4709                         // User is Local, change needs to be reflected!
4710                         TreeServer* SourceServer = Utils->FindServer(user->server);
4711                         if (SourceServer)
4712                         {
4713                                 SourceServer->AddUserCount();
4714                         }
4715
4716                 }
4717         }
4718
4719         virtual void OnUserQuit(userrec* user, const std::string &reason)
4720         {
4721                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4722                 {
4723                         std::deque<std::string> params;
4724                         params.push_back(":"+reason);
4725                         Utils->DoOneToMany(user->nick,"QUIT",params);
4726                 }
4727                 // Regardless, We need to modify the user Counts..
4728                 TreeServer* SourceServer = Utils->FindServer(user->server);
4729                 if (SourceServer)
4730                 {
4731                         SourceServer->DelUserCount();
4732                 }
4733
4734         }
4735
4736         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4737         {
4738                 if (IS_LOCAL(user))
4739                 {
4740                         std::deque<std::string> params;
4741                         params.push_back(user->nick);
4742                         Utils->DoOneToMany(oldnick,"NICK",params);
4743                 }
4744         }
4745
4746         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4747         {
4748                 if ((source) && (IS_LOCAL(source)))
4749                 {
4750                         std::deque<std::string> params;
4751                         params.push_back(chan->name);
4752                         params.push_back(user->nick);
4753                         params.push_back(":"+reason);
4754                         Utils->DoOneToMany(source->nick,"KICK",params);
4755                 }
4756                 else if (!source)
4757                 {
4758                         std::deque<std::string> params;
4759                         params.push_back(chan->name);
4760                         params.push_back(user->nick);
4761                         params.push_back(":"+reason);
4762                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4763                 }
4764         }
4765
4766         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4767         {
4768                 std::deque<std::string> params;
4769                 params.push_back(dest->nick);
4770                 params.push_back(":"+reason);
4771                 Utils->DoOneToMany(source->nick,"KILL",params);
4772         }
4773
4774         virtual void OnRehash(const std::string &parameter)
4775         {
4776                 if (parameter != "")
4777                 {
4778                         std::deque<std::string> params;
4779                         params.push_back(parameter);
4780                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4781                         // check for self
4782                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4783                         {
4784                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4785                                 ServerInstance->RehashServer();
4786                         }
4787                 }
4788                 Utils->ReadConfiguration(false);
4789         }
4790
4791         // note: the protocol does not allow direct umode +o except
4792         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4793         // locally.
4794         virtual void OnOper(userrec* user, const std::string &opertype)
4795         {
4796                 if (IS_LOCAL(user))
4797                 {
4798                         std::deque<std::string> params;
4799                         params.push_back(opertype);
4800                         Utils->DoOneToMany(user->nick,"OPERTYPE",params);
4801                 }
4802         }
4803
4804         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4805         {
4806                 if (IS_LOCAL(source))
4807                 {
4808                         char type[8];
4809                         snprintf(type,8,"%cLINE",linetype);
4810                         std::string stype = type;
4811                         if (adding)
4812                         {
4813                                 char sduration[MAXBUF];
4814                                 snprintf(sduration,MAXBUF,"%ld",duration);
4815                                 std::deque<std::string> params;
4816                                 params.push_back(host);
4817                                 params.push_back(sduration);
4818                                 params.push_back(":"+reason);
4819                                 Utils->DoOneToMany(source->nick,stype,params);
4820                         }
4821                         else
4822                         {
4823                                 std::deque<std::string> params;
4824                                 params.push_back(host);
4825                                 Utils->DoOneToMany(source->nick,stype,params);
4826                         }
4827                 }
4828         }
4829
4830         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4831         {
4832                 OnLine(source,hostmask,true,'G',duration,reason);
4833         }
4834
4835         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4836         {
4837                 OnLine(source,ipmask,true,'Z',duration,reason);
4838         }
4839
4840         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4841         {
4842                 OnLine(source,nickmask,true,'Q',duration,reason);
4843         }
4844
4845         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4846         {
4847                 OnLine(source,hostmask,true,'E',duration,reason);
4848         }
4849
4850         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4851         {
4852                 OnLine(source,hostmask,false,'G',0,"");
4853         }
4854
4855         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4856         {
4857                 OnLine(source,ipmask,false,'Z',0,"");
4858         }
4859
4860         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4861         {
4862                 OnLine(source,nickmask,false,'Q',0,"");
4863         }
4864
4865         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4866         {
4867                 OnLine(source,hostmask,false,'E',0,"");
4868         }
4869
4870         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4871         {
4872                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4873                 {
4874                         if (target_type == TYPE_USER)
4875                         {
4876                                 userrec* u = (userrec*)dest;
4877                                 std::deque<std::string> params;
4878                                 params.push_back(u->nick);
4879                                 params.push_back(text);
4880                                 Utils->DoOneToMany(user->nick,"MODE",params);
4881                         }
4882                         else
4883                         {
4884                                 chanrec* c = (chanrec*)dest;
4885                                 std::deque<std::string> params;
4886                                 params.push_back(c->name);
4887                                 params.push_back(text);
4888                                 Utils->DoOneToMany(user->nick,"MODE",params);
4889                         }
4890                 }
4891         }
4892
4893         virtual void OnSetAway(userrec* user)
4894         {
4895                 if (IS_LOCAL(user))
4896                 {
4897                         std::deque<std::string> params;
4898                         params.push_back(":"+std::string(user->awaymsg));
4899                         Utils->DoOneToMany(user->nick,"AWAY",params);
4900                 }
4901         }
4902
4903         virtual void OnCancelAway(userrec* user)
4904         {
4905                 if (IS_LOCAL(user))
4906                 {
4907                         std::deque<std::string> params;
4908                         params.clear();
4909                         Utils->DoOneToMany(user->nick,"AWAY",params);
4910                 }
4911         }
4912
4913         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4914         {
4915                 TreeSocket* s = (TreeSocket*)opaque;
4916                 if (target)
4917                 {
4918                         if (target_type == TYPE_USER)
4919                         {
4920                                 userrec* u = (userrec*)target;
4921                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4922                         }
4923                         else
4924                         {
4925                                 chanrec* c = (chanrec*)target;
4926                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4927                         }
4928                 }
4929         }
4930
4931         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4932         {
4933                 TreeSocket* s = (TreeSocket*)opaque;
4934                 if (target)
4935                 {
4936                         if (target_type == TYPE_USER)
4937                         {
4938                                 userrec* u = (userrec*)target;
4939                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4940                         }
4941                         else if (target_type == TYPE_OTHER)
4942                         {
4943                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4944                         }
4945                         else if (target_type == TYPE_CHANNEL)
4946                         {
4947                                 chanrec* c = (chanrec*)target;
4948                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4949                         }
4950                 }
4951         }
4952
4953         virtual void OnEvent(Event* event)
4954         {
4955                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4956
4957                 if (event->GetEventID() == "send_metadata")
4958                 {
4959                         if (params->size() < 3)
4960                                 return;
4961                         (*params)[2] = ":" + (*params)[2];
4962                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4963                 }
4964                 else if (event->GetEventID() == "send_topic")
4965                 {
4966                         if (params->size() < 2)
4967                                 return;
4968                         (*params)[1] = ":" + (*params)[1];
4969                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
4970                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time()));
4971                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
4972                 }
4973                 else if (event->GetEventID() == "send_mode")
4974                 {
4975                         if (params->size() < 2)
4976                                 return;
4977                         // Insert the TS value of the object, either userrec or chanrec
4978                         time_t ourTS = 0;
4979                         userrec* a = ServerInstance->FindNick((*params)[0]);
4980                         if (a)
4981                         {
4982                                 ourTS = a->age;
4983                         }
4984                         else
4985                         {
4986                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4987                                 if (a)
4988                                 {
4989                                         ourTS = a->age;
4990                                 }
4991                         }
4992                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4993                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4994                 }
4995         }
4996
4997         virtual ~ModuleSpanningTree()
4998         {
4999                 ServerInstance->Log(DEBUG,"Performing unload of spanningtree!");
5000                 /* This will also free the listeners */
5001                 delete Utils;
5002         }
5003
5004         virtual Version GetVersion()
5005         {
5006                 return Version(1,1,0,2,VF_VENDOR,API_VERSION);
5007         }
5008
5009         void Implements(char* List)
5010         {
5011                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
5012                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
5013                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
5014                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
5015                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
5016                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
5017                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
5018         }
5019
5020         /* It is IMPORTANT that m_spanningtree is the last module in the chain
5021          * so that any activity it sees is FINAL, e.g. we arent going to send out
5022          * a NICK message before m_cloaking has finished putting the +x on the user,
5023          * etc etc.
5024          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
5025          * the module call queue.
5026          */
5027         Priority Prioritize()
5028         {
5029                 return PRIORITY_LAST;
5030         }
5031 };
5032
5033 void SpanningTreeUtilities::DoFailOver(Link* x)
5034 {
5035         if (x->FailOver.length())
5036         {
5037                 if (x->FailOver == x->Name)
5038                 {
5039                         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());
5040                         return;
5041                 }
5042                 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
5043                 if (TryThisOne)
5044                 {
5045                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
5046                         Creator->ConnectServer(TryThisOne);
5047                 }
5048                 else
5049                 {
5050                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
5051                 }
5052         }
5053 }
5054
5055 Link* SpanningTreeUtilities::FindLink(const std::string& name)
5056 {
5057         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
5058         {
5059                 if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
5060                 {
5061                         return &(*x);
5062                 }
5063         }
5064         return NULL;
5065 }
5066
5067
5068 class ModuleSpanningTreeFactory : public ModuleFactory
5069 {
5070  public:
5071         ModuleSpanningTreeFactory()
5072         {
5073         }
5074
5075         ~ModuleSpanningTreeFactory()
5076         {
5077         }
5078
5079         virtual Module * CreateModule(InspIRCd* Me)
5080         {
5081                 return new ModuleSpanningTree(Me);
5082         }
5083
5084 };
5085
5086
5087 extern "C" void * init_module( void )
5088 {
5089         return new ModuleSpanningTreeFactory;
5090 }