src/modules/m_spanningtree.cpp

   1 /*   +------------------------------------+
   2  *   | Inspire Internet Relay Chat Daemon |
   3  *   +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                     E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* $ModDesc: Povides a spanning tree server link protocol */
  18
  19 #include "configreader.h"
  20 #include "users.h"
  21 #include "channels.h"
  22 #include "modules.h"
  23 #include "commands/cmd_whois.h"
  24 #include "commands/cmd_stats.h"
  25 #include "socket.h"
  26 #include "inspircd.h"
  27 #include "wildcard.h"
  28 #include "xline.h"
  29 #include "aes.h"
  30
  31 /** If you make a change which breaks the protocol, increment this.
  32  * If you  completely change the protocol, completely change the number.
  33  */
  34 const long ProtocolVersion = 1101;
  35
  36 /*
  37  * The server list in InspIRCd is maintained as two structures
  38  * which hold the data in different ways. Most of the time, we
  39  * want to very quicky obtain three pieces of information:
  40  *
  41  * (1) The information on a server
  42  * (2) The information on the server we must send data through
  43  *     to actually REACH the server we're after
  44  * (3) Potentially, the child/parent objects of this server
  45  *
  46  * The InspIRCd spanning protocol provides easy access to these
  47  * by storing the data firstly in a recursive structure, where
  48  * each item references its parent item, and a dynamic list
  49  * of child items, and another structure which stores the items
  50  * hashed, linearly. This means that if we want to find a server
  51  * by name quickly, we can look it up in the hash, avoiding
  52  * any O(n) lookups. If however, during a split or sync, we want
  53  * to apply an operation to a server, and any of its child objects
  54  * we can resort to recursion to walk the tree structure.
  55  * Any socket can have one of five states at any one time.
  56  * The LISTENER state indicates a socket which is listening
  57  * for connections. It cannot receive data itself, only incoming
  58  * sockets.
  59  * The CONNECTING state indicates an outbound socket which is
  60  * waiting to be writeable.
  61  * The WAIT_AUTH_1 state indicates the socket is outbound and
  62  * has successfully connected, but has not yet sent and received
  63  * SERVER strings.
  64  * The WAIT_AUTH_2 state indicates that the socket is inbound
  65  * (allocated by a LISTENER) but has not yet sent and received
  66  * SERVER strings.
  67  * The CONNECTED state represents a fully authorized, fully
  68  * connected server.
  69  */
  70 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  71
  72 /* Foward declarations */
  73 class TreeServer;
  74 class TreeSocket;
  75 class Link;
  76 class ModuleSpanningTree;
  77
  78 /* This hash_map holds the hash equivalent of the server
  79  * tree, used for rapid linear lookups.
  80  */
  81 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
  82
  83
  84 /** The Link class might as well be a struct,
  85  * but this is C++ and we don't believe in structs (!).
  86  * It holds the entire information of one <link>
  87  * tag from the main config file. We maintain a list
  88  * of them, and populate the list on rehash/load.
  89  */
  90 class Link : public classbase
  91 {
  92  public:
  93         irc::string Name;
  94         std::string IPAddr;
  95         int Port;
  96         std::string SendPass;
  97         std::string RecvPass;
  98         unsigned long AutoConnect;
  99         time_t NextConnectTime;
 100         std::string EncryptionKey;
 101         bool HiddenFromStats;
 102         std::string FailOver;
 103 };
 104
 105 /** Contains helper functions and variables for this module,
 106  * and keeps them out of the global namespace
 107  */
 108 class SpanningTreeUtilities
 109 {
 110  private:
 111         /** Creator server
 112          */
 113         InspIRCd* ServerInstance;
 114  public:
 115         /** Creator module
 116          */
 117         ModuleSpanningTree* Creator;
 118         /** Flatten links and /MAP for non-opers
 119          */
 120         bool FlatLinks;
 121         /** Hide U-Lined servers in /MAP and /LINKS
 122          */
 123         bool HideULines;
 124         /** Announce TS changes to channels on merge
 125          */
 126         bool AnnounceTSChange;
 127         /** Socket bindings for listening sockets
 128          */
 129         std::vector<TreeSocket*> Bindings;
 130         /** This variable represents the root of the server tree
 131          */
 132         TreeServer *TreeRoot;
 133         /** IPs allowed to link to us
 134          */
 135         std::vector<std::string> ValidIPs;
 136         /** Hash of currently connected servers by name
 137          */
 138         server_hash serverlist;
 139         /** Holds the data from the <link> tags in the conf
 140          */
 141         std::vector<Link> LinkBlocks;
 142
 143         /** Initialise utility class
 144          */
 145         SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* Creator);
 146         /** Destroy class and free listeners etc
 147          */
 148         ~SpanningTreeUtilities();
 149         /** Send a message from this server to one other local or remote
 150          */
 151         bool DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target);
 152         /** Send a message from this server to all but one other, local or remote
 153          */
 154         bool DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit);
 155         /** Send a message from this server to all but one other, local or remote
 156          */
 157         bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 158         /** Send a message from this server to all others
 159          */
 160         bool DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params);
 161         /** Send a message from this server to all others
 162          */
 163         bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 164         /** Send a message from this server to all others, without doing any processing on the command (e.g. send it as-is with colons and all)
 165          */
 166         bool DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params);
 167         /** Read the spanningtree module's tags from the config file
 168          */
 169         void ReadConfiguration(bool rebind);
 170         /** Add a server to the server list for GetListOfServersForChannel
 171          */
 172         void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list);
 173         /** Compile a list of servers which contain members of channel c
 174          */
 175         void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list);
 176         /** Find a server by name
 177          */
 178         TreeServer* FindServer(const std::string &ServerName);
 179         /** Find a route to a server by name
 180          */
 181         TreeServer* BestRouteTo(const std::string &ServerName);
 182         /** Find a server by glob mask
 183          */
 184         TreeServer* FindServerMask(const std::string &ServerName);
 185         /** Returns true if this is a server name we recognise
 186          */
 187         bool IsServer(const std::string &ServerName);
 188         /** Attempt to connect to the failover link of link x
 189          */
 190         void DoFailOver(Link* x);
 191         /** Find a link tag from a server name
 192          */
 193         Link* FindLink(const std::string& name);
 194 };
 195
 196
 197 /** Each server in the tree is represented by one class of
 198  * type TreeServer. A locally connected TreeServer can
 199  * have a class of type TreeSocket associated with it, for
 200  * remote servers, the TreeSocket entry will be NULL.
 201  * Each server also maintains a pointer to its parent
 202  * (NULL if this server is ours, at the top of the tree)
 203  * and a pointer to its "Route" (see the comments in the
 204  * constructors below), and also a dynamic list of pointers
 205  * to its children which can be iterated recursively
 206  * if required. Creating or deleting objects of type
 207  i* TreeServer automatically maintains the hash_map of
 208  * TreeServer items, deleting and inserting them as they
 209  * are created and destroyed.
 210  */
 211 class TreeServer : public classbase
 212 {
 213         InspIRCd* ServerInstance;               /* Creator */
 214         TreeServer* Parent;                     /* Parent entry */
 215         TreeServer* Route;                      /* Route entry */
 216         std::vector<TreeServer*> Children;      /* List of child objects */
 217         irc::string ServerName;                 /* Server's name */
 218         std::string ServerDesc;                 /* Server's description */
 219         std::string VersionString;              /* Version string or empty string */
 220         int UserCount;                          /* Not used in this version */
 221         int OperCount;                          /* Not used in this version */
 222         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 223         time_t NextPing;                        /* After this time, the server should be PINGed*/
 224         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 225         SpanningTreeUtilities* Utils;           /* Utility class */
 226
 227  public:
 228
 229         /** We don't use this constructor. Its a dummy, and won't cause any insertion
 230          * of the TreeServer into the hash_map. See below for the two we DO use.
 231          */
 232         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance) : ServerInstance(Instance), Utils(Util)
 233         {
 234                 Parent = NULL;
 235                 ServerName = "";
 236                 ServerDesc = "";
 237                 VersionString = "";
 238                 UserCount = OperCount = 0;
 239                 VersionString = ServerInstance->GetVersionString();
 240         }
 241
 242         /** We use this constructor only to create the 'root' item, Utils->TreeRoot, which
 243          * represents our own server. Therefore, it has no route, no parent, and
 244          * no socket associated with it. Its version string is our own local version.
 245          */
 246         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc), Utils(Util)
 247         {
 248                 Parent = NULL;
 249                 VersionString = "";
 250                 UserCount = ServerInstance->UserCount();
 251                 OperCount = ServerInstance->OperCount();
 252                 VersionString = ServerInstance->GetVersionString();
 253                 Route = NULL;
 254                 Socket = NULL; /* Fix by brain */
 255                 AddHashEntry();
 256         }
 257
 258         /** When we create a new server, we call this constructor to initialize it.
 259          * This constructor initializes the server's Route and Parent, and sets up
 260          * its ping counters so that it will be pinged one minute from now.
 261          */
 262         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 263                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock), Utils(Util)
 264         {
 265                 VersionString = "";
 266                 UserCount = OperCount = 0;
 267                 this->SetNextPingTime(time(NULL) + 60);
 268                 this->SetPingFlag();
 269
 270                 /* find the 'route' for this server (e.g. the one directly connected
 271                  * to the local server, which we can use to reach it)
 272                  *
 273                  * In the following example, consider we have just added a TreeServer
 274                  * class for server G on our network, of which we are server A.
 275                  * To route traffic to G (marked with a *) we must send the data to
 276                  * B (marked with a +) so this algorithm initializes the 'Route'
 277                  * value to point at whichever server traffic must be routed through
 278                  * to get here. If we were to try this algorithm with server B,
 279                  * the Route pointer would point at its own object ('this').
 280                  *
 281                  *              A
 282                  *             / \
 283                  *          + B   C
 284                  *           / \   \
 285                  *          D   E   F
 286                  *         /         \
 287                  *      * G           H
 288                  *
 289                  * We only run this algorithm when a server is created, as
 290                  * the routes remain constant while ever the server exists, and
 291                  * do not need to be re-calculated.
 292                  */
 293
 294                 Route = Above;
 295                 if (Route == Utils->TreeRoot)
 296                 {
 297                         Route = this;
 298                 }
 299                 else
 300                 {
 301                         while (this->Route->GetParent() != Utils->TreeRoot)
 302                         {
 303                                 this->Route = Route->GetParent();
 304                         }
 305                 }
 306
 307                 /* Because recursive code is slow and takes a lot of resources,
 308                  * we store two representations of the server tree. The first
 309                  * is a recursive structure where each server references its
 310                  * children and its parent, which is used for netbursts and
 311                  * netsplits to dump the whole dataset to the other server,
 312                  * and the second is used for very fast lookups when routing
 313                  * messages and is instead a hash_map, where each item can
 314                  * be referenced by its server name. The AddHashEntry()
 315                  * call below automatically inserts each TreeServer class
 316                  * into the hash_map as it is created. There is a similar
 317                  * maintainance call in the destructor to tidy up deleted
 318                  * servers.
 319                  */
 320
 321                 this->AddHashEntry();
 322         }
 323
 324         int QuitUsers(const std::string &reason)
 325         {
 326                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 327                 const char* reason_s = reason.c_str();
 328                 std::vector<userrec*> time_to_die;
 329                 for (user_hash::iterator n = ServerInstance->clientlist.begin(); n != ServerInstance->clientlist.end(); n++)
 330                 {
 331                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 332                         {
 333                                 time_to_die.push_back(n->second);
 334                         }
 335                 }
 336                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 337                 {
 338                         userrec* a = (userrec*)*n;
 339                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 340                         if (!IS_LOCAL(a))
 341                                 userrec::QuitUser(ServerInstance,a,reason_s);
 342                 }
 343                 return time_to_die.size();
 344         }
 345
 346         /** This method is used to add the structure to the
 347          * hash_map for linear searches. It is only called
 348          * by the constructors.
 349          */
 350         void AddHashEntry()
 351         {
 352                 server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str());
 353                 if (iter == Utils->serverlist.end())
 354                         Utils->serverlist[this->ServerName.c_str()] = this;
 355         }
 356
 357         /** This method removes the reference to this object
 358          * from the hash_map which is used for linear searches.
 359          * It is only called by the default destructor.
 360          */
 361         void DelHashEntry()
 362         {
 363                 server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str());
 364                 if (iter != Utils->serverlist.end())
 365                         Utils->serverlist.erase(iter);
 366         }
 367
 368         /** These accessors etc should be pretty self-
 369          * explanitory.
 370          */
 371         TreeServer* GetRoute()
 372         {
 373                 return Route;
 374         }
 375
 376         std::string GetName()
 377         {
 378                 return ServerName.c_str();
 379         }
 380
 381         std::string GetDesc()
 382         {
 383                 return ServerDesc;
 384         }
 385
 386         std::string GetVersion()
 387         {
 388                 return VersionString;
 389         }
 390
 391         void SetNextPingTime(time_t t)
 392         {
 393                 this->NextPing = t;
 394                 LastPingWasGood = false;
 395         }
 396
 397         time_t NextPingTime()
 398         {
 399                 return NextPing;
 400         }
 401
 402         bool AnsweredLastPing()
 403         {
 404                 return LastPingWasGood;
 405         }
 406
 407         void SetPingFlag()
 408         {
 409                 LastPingWasGood = true;
 410         }
 411
 412         int GetUserCount()
 413         {
 414                 return UserCount;
 415         }
 416
 417         void AddUserCount()
 418         {
 419                 UserCount++;
 420         }
 421
 422         void DelUserCount()
 423         {
 424                 UserCount--;
 425         }
 426
 427         int GetOperCount()
 428         {
 429                 return OperCount;
 430         }
 431
 432         TreeSocket* GetSocket()
 433         {
 434                 return Socket;
 435         }
 436
 437         TreeServer* GetParent()
 438         {
 439                 return Parent;
 440         }
 441
 442         void SetVersion(const std::string &Version)
 443         {
 444                 VersionString = Version;
 445         }
 446
 447         unsigned int ChildCount()
 448         {
 449                 return Children.size();
 450         }
 451
 452         TreeServer* GetChild(unsigned int n)
 453         {
 454                 if (n < Children.size())
 455                 {
 456                         /* Make sure they  cant request
 457                          * an out-of-range object. After
 458                          * all we know what these programmer
 459                          * types are like *grin*.
 460                          */
 461                         return Children[n];
 462                 }
 463                 else
 464                 {
 465                         return NULL;
 466                 }
 467         }
 468
 469         void AddChild(TreeServer* Child)
 470         {
 471                 Children.push_back(Child);
 472         }
 473
 474         bool DelChild(TreeServer* Child)
 475         {
 476                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 477                 {
 478                         if (*a == Child)
 479                         {
 480                                 Children.erase(a);
 481                                 return true;
 482                         }
 483                 }
 484                 return false;
 485         }
 486
 487         /** Removes child nodes of this node, and of that node, etc etc.
 488          * This is used during netsplits to automatically tidy up the
 489          * server tree. It is slow, we don't use it for much else.
 490          */
 491         bool Tidy()
 492         {
 493                 bool stillchildren = true;
 494                 while (stillchildren)
 495                 {
 496                         stillchildren = false;
 497                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 498                         {
 499                                 TreeServer* s = (TreeServer*)*a;
 500                                 s->Tidy();
 501                                 Children.erase(a);
 502                                 DELETE(s);
 503                                 stillchildren = true;
 504                                 break;
 505                         }
 506                 }
 507                 return true;
 508         }
 509
 510         ~TreeServer()
 511         {
 512                 /* We'd better tidy up after ourselves, eh? */
 513                 this->DelHashEntry();
 514         }
 515 };
 516
 517 /** Yay for fast searches!
 518  * This is hundreds of times faster than recursion
 519  * or even scanning a linked list, especially when
 520  * there are more than a few servers to deal with.
 521  * (read as: lots).
 522  */
 523 TreeServer* SpanningTreeUtilities::FindServer(const std::string &ServerName)
 524 {
 525         server_hash::iterator iter;
 526         iter = serverlist.find(ServerName.c_str());
 527         if (iter != serverlist.end())
 528         {
 529                 return iter->second;
 530         }
 531         else
 532         {
 533                 return NULL;
 534         }
 535 }
 536
 537 /** Returns the locally connected server we must route a
 538  * message through to reach server 'ServerName'. This
 539  * only applies to one-to-one and not one-to-many routing.
 540  * See the comments for the constructor of TreeServer
 541  * for more details.
 542  */
 543 TreeServer* SpanningTreeUtilities::BestRouteTo(const std::string &ServerName)
 544 {
 545         if (ServerName.c_str() == TreeRoot->GetName())
 546                 return NULL;
 547         TreeServer* Found = FindServer(ServerName);
 548         if (Found)
 549         {
 550                 return Found->GetRoute();
 551         }
 552         else
 553         {
 554                 return NULL;
 555         }
 556 }
 557
 558 /** Find the first server matching a given glob mask.
 559  * Theres no find-using-glob method of hash_map [awwww :-(]
 560  * so instead, we iterate over the list using an iterator
 561  * and match each one until we get a hit. Yes its slow,
 562  * deal with it.
 563  */
 564 TreeServer* SpanningTreeUtilities::FindServerMask(const std::string &ServerName)
 565 {
 566         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 567         {
 568                 if (match(i->first.c_str(),ServerName.c_str()))
 569                         return i->second;
 570         }
 571         return NULL;
 572 }
 573
 574 /* A convenient wrapper that returns true if a server exists */
 575 bool SpanningTreeUtilities::IsServer(const std::string &ServerName)
 576 {
 577         return (FindServer(ServerName) != NULL);
 578 }
 579
 580
 581 /** Handle /RCONNECT
 582  */
 583 class cmd_rconnect : public command_t
 584 {
 585         Module* Creator;
 586         SpanningTreeUtilities* Utils;
 587  public:
 588         cmd_rconnect (InspIRCd* Instance, Module* Callback, SpanningTreeUtilities* Util) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback), Utils(Util)
 589         {
 590                 this->source = "m_spanningtree.so";
 591                 syntax = "<remote-server-mask> <servermask>";
 592         }
 593
 594         CmdResult Handle (const char** parameters, int pcnt, userrec *user)
 595         {
 596                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 597                 /* Is this aimed at our server? */
 598                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 599                 {
 600                         /* Yes, initiate the given connect */
 601                         ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 602                         const char* para[1];
 603                         para[0] = parameters[1];
 604                         std::string original_command = std::string("CONNECT ") + parameters[1];
 605                         Creator->OnPreCommand("CONNECT", para, 1, user, true, original_command);
 606
 607                         return CMD_SUCCESS;
 608                 }
 609
 610                 return CMD_FAILURE;
 611         }
 612 };
 613
 614
 615
 616 /** Every SERVER connection inbound or outbound is represented by
 617  * an object of type TreeSocket.
 618  * TreeSockets, being inherited from InspSocket, can be tied into
 619  * the core socket engine, and we cn therefore receive activity events
 620  * for them, just like activex objects on speed. (yes really, that
 621  * is a technical term!) Each of these which relates to a locally
 622  * connected server is assocated with it, by hooking it onto a
 623  * TreeSocket class using its constructor. In this way, we can
 624  * maintain a list of servers, some of which are directly connected,
 625  * some of which are not.
 626  */
 627 class TreeSocket : public InspSocket
 628 {
 629         SpanningTreeUtilities* Utils;
 630         std::string myhost;
 631         std::string in_buffer;
 632         ServerState LinkState;
 633         std::string InboundServerName;
 634         std::string InboundDescription;
 635         int num_lost_users;
 636         int num_lost_servers;
 637         time_t NextPing;
 638         bool LastPingWasGood;
 639         bool bursting;
 640         AES* ctx_in;
 641         AES* ctx_out;
 642         unsigned int keylength;
 643         std::string ModuleList;
 644         std::map<std::string,std::string> CapKeys;
 645
 646  public:
 647
 648         /** Because most of the I/O gubbins are encapsulated within
 649          * InspSocket, we just call the superclass constructor for
 650          * most of the action, and append a few of our own values
 651          * to it.
 652          */
 653         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime)
 654                 : InspSocket(SI, host, port, listening, maxtime), Utils(Util)
 655         {
 656                 myhost = host;
 657                 this->LinkState = LISTENER;
 658                 this->ctx_in = NULL;
 659                 this->ctx_out = NULL;
 660         }
 661
 662         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 663                 : InspSocket(SI, host, port, listening, maxtime), Utils(Util)
 664         {
 665                 myhost = ServerName;
 666                 this->LinkState = CONNECTING;
 667                 this->ctx_in = NULL;
 668                 this->ctx_out = NULL;
 669         }
 670
 671         /** When a listening socket gives us a new file descriptor,
 672          * we must associate it with a socket without creating a new
 673          * connection. This constructor is used for this purpose.
 674          */
 675         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip)
 676                 : InspSocket(SI, newfd, ip), Utils(Util)
 677         {
 678                 this->LinkState = WAIT_AUTH_1;
 679                 this->ctx_in = NULL;
 680                 this->ctx_out = NULL;
 681                 this->SendCapabilities();
 682         }
 683
 684         ~TreeSocket()
 685         {
 686                 if (ctx_in)
 687                         DELETE(ctx_in);
 688                 if (ctx_out)
 689                         DELETE(ctx_out);
 690         }
 691
 692         void InitAES(std::string key,std::string SName)
 693         {
 694                 if (key == "")
 695                         return;
 696
 697                 ctx_in = new AES();
 698                 ctx_out = new AES();
 699                 Instance->Log(DEBUG,"Initialized AES key %s",key.c_str());
 700                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 701                 keylength = key.length();
 702                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 703                 {
 704                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 705                         Instance->Log(DEBUG,"Key length not 16, 24 or 32 characters!");
 706                 }
 707                 else
 708                 {
 709                         if (this->GetState() != I_ERROR)
 710                         {
 711                                 this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 712                                 ctx_in->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 713                                         \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 714                                 ctx_out->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 715                                         \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 716                         }
 717                 }
 718         }
 719
 720         /** When an outbound connection finishes connecting, we receive
 721          * this event, and must send our SERVER string to the other
 722          * side. If the other side is happy, as outlined in the server
 723          * to server docs on the inspircd.org site, the other side
 724          * will then send back its own server string.
 725          */
 726         virtual bool OnConnected()
 727         {
 728                 if (this->LinkState == CONNECTING)
 729                 {
 730                         /* we do not need to change state here. */
 731                         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 732                         {
 733                                 if (x->Name == this->myhost)
 734                                 {
 735                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
 736                                         this->SendCapabilities();
 737                                         if (x->EncryptionKey != "")
 738                                         {
 739                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 740                                                 {
 741                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 742                                                 }
 743                                                 else
 744                                                 {
 745                                                         this->WriteLine(std::string("AES ")+this->Instance->Config->ServerName);
 746                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 747                                                 }
 748                                         }
 749                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 750                                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 751                                         return true;
 752                                 }
 753                         }
 754                 }
 755                 /* There is a (remote) chance that between the /CONNECT and the connection
 756                  * being accepted, some muppet has removed the <link> block and rehashed.
 757                  * If that happens the connection hangs here until it's closed. Unlikely
 758                  * and rather harmless.
 759                  */
 760                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 761                 return true;
 762         }
 763
 764         virtual void OnError(InspSocketError e)
 765         {
 766                 /* We don't handle this method, because all our
 767                  * dirty work is done in OnClose() (see below)
 768                  * which is still called on error conditions too.
 769                  */
 770                 if (e == I_ERR_CONNECT)
 771                 {
 772                         this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
 773                         Link* MyLink = Utils->FindLink(myhost);
 774                         if (MyLink)
 775                                 Utils->DoFailOver(MyLink);
 776                 }
 777         }
 778
 779         virtual int OnDisconnect()
 780         {
 781                 /* For the same reason as above, we don't
 782                  * handle OnDisconnect()
 783                  */
 784                 return true;
 785         }
 786
 787         /** Recursively send the server tree with distances as hops.
 788          * This is used during network burst to inform the other server
 789          * (and any of ITS servers too) of what servers we know about.
 790          * If at any point any of these servers already exist on the other
 791          * end, our connection may be terminated. The hopcounts given
 792          * by this function are relative, this doesn't matter so long as
 793          * they are all >1, as all the remote servers re-calculate them
 794          * to be relative too, with themselves as hop 0.
 795          */
 796         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 797         {
 798                 char command[1024];
 799                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 800                 {
 801                         TreeServer* recursive_server = Current->GetChild(q);
 802                         if (recursive_server != s)
 803                         {
 804                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 805                                 this->WriteLine(command);
 806                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 807                                 /* down to next level */
 808                                 this->SendServers(recursive_server, s, hops+1);
 809                         }
 810                 }
 811         }
 812
 813         std::string MyCapabilities()
 814         {
 815                 std::vector<std::string> modlist;
 816                 std::string capabilities = "";
 817
 818                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 819                 {
 820                         if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
 821                                 modlist.push_back(this->Instance->Config->module_names[i]);
 822                 }
 823                 sort(modlist.begin(),modlist.end());
 824                 for (unsigned int i = 0; i < modlist.size(); i++)
 825                 {
 826                         if (i)
 827                                 capabilities = capabilities + ",";
 828                         capabilities = capabilities + modlist[i];
 829                 }
 830                 return capabilities;
 831         }
 832
 833         void SendCapabilities()
 834         {
 835                 irc::commasepstream modulelist(MyCapabilities());
 836
 837                 this->WriteLine("CAPAB START");
 838
 839                 /* Send module names, split at 509 length */
 840                 std::string item = "*";
 841                 std::string line = "CAPAB MODULES ";
 842                 while ((item = modulelist.GetToken()) != "")
 843                 {
 844                         if (line.length() + item.length() + 1 > 509)
 845                         {
 846                                 this->WriteLine(line);
 847                                 line = "CAPAB MODULES ";
 848                         }
 849
 850                         if (line != "CAPAB MODULES ")
 851                                 line.append(",");
 852
 853                         line.append(item);
 854                 }
 855                 if (line != "CAPAB MODULES ")
 856                         this->WriteLine(line);
 857
 858                 int ip6 = 0;
 859                 int ip6support = 0;
 860 #ifdef IPV6
 861                 ip6 = 1;
 862 #endif
 863 #ifdef SUPPORT_IP6LINKS
 864                 ip6support = 1;
 865 #endif
 866                 this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support)+" PROTOCOL="+ConvToStr(ProtocolVersion));
 867
 868                 this->WriteLine("CAPAB END");
 869         }
 870
 871         /* Check a comma seperated list for an item */
 872         bool HasItem(const std::string &list, const std::string &item)
 873         {
 874                 irc::commasepstream seplist(list);
 875
 876                 std::string item2 = "*";
 877                 while ((item2 = seplist.GetToken()) != "")
 878                 {
 879                         if (item2 == item)
 880                                 return true;
 881                 }
 882
 883                 return false;
 884         }
 885
 886         /* Isolate and return the elements that are different between two comma seperated lists */
 887         std::string ListDifference(const std::string &one, const std::string &two)
 888         {
 889                 irc::commasepstream list_one(one);
 890                 std::string item = "*";
 891                 std::string result = "";
 892                 while ((item = list_one.GetToken()) != "")
 893                 {
 894                         if (!HasItem(two, item))
 895                         {
 896                                 result.append(" ");
 897                                 result.append(item);
 898                         }
 899                 }
 900                 return result;
 901         }
 902
 903         bool Capab(const std::deque<std::string> &params)
 904         {
 905                 if (params.size() < 1)
 906                 {
 907                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 908                         return false;
 909                 }
 910
 911                 if (params[0] == "START")
 912                 {
 913                         this->ModuleList = "";
 914                         this->CapKeys.clear();
 915                 }
 916                 else if (params[0] == "END")
 917                 {
 918                         std::string reason = "";
 919                         int ip6support = 0;
 920 #ifdef SUPPORT_IP6LINKS
 921                         ip6support = 1;
 922 #endif
 923                         /* Compare ModuleList and check CapKeys...
 924                          * Maybe this could be tidier? -- Brain
 925                          */
 926                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 927                         {
 928                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 929                                 if (!diff.length())
 930                                 {
 931                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 932                                 }
 933                                 else
 934                                 {
 935                                         diff = "this server:" + diff;
 936                                 }
 937                                 if (diff.length() == 12)
 938                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 939                                 else
 940                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 941                         }
 942
 943                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 944                                 reason = "We don't both support linking to IPV6 servers";
 945
 946                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 947                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 948
 949                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 950                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 951
 952                         if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
 953                         {
 954                                 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
 955                                 {
 956                                         reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
 957                                 }
 958                                 else
 959                                 {
 960                                         reason = "Protocol version not specified";
 961                                 }
 962                         }
 963
 964                         if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
 965                                 reason = "We don't both have halfop support enabled/disabled identically";
 966
 967                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 968                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 969
 970                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 971                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 972
 973                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 974                                 reason = "Maximum modes per line differ or remote modes per line not specified";
 975
 976                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 977                                 reason = "Maximum quit lengths differ or remote quit length not specified";
 978
 979                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 980                                 reason = "Maximum topic lengths differ or remote topic length not specified";
 981
 982                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
 983                                 reason = "Maximum kick lengths differ or remote kick length not specified";
 984
 985                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
 986                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
 987
 988                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
 989                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
 990
 991                         if (reason.length())
 992                         {
 993                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
 994                                 return false;
 995                         }
 996                 }
 997                 else if ((params[0] == "MODULES") && (params.size() == 2))
 998                 {
 999                         if (!this->ModuleList.length())
1000                         {
1001                                 this->ModuleList.append(params[1]);
1002                         }
1003                         else
1004                         {
1005                                 this->ModuleList.append(",");
1006                                 this->ModuleList.append(params[1]);
1007                         }
1008                 }
1009                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
1010                 {
1011                         irc::tokenstream capabs(params[1]);
1012                         std::string item = "*";
1013                         while ((item = capabs.GetToken()) != "")
1014                         {
1015                                 /* Process each key/value pair */
1016                                 std::string::size_type equals = item.rfind('=');
1017                                 if (equals != std::string::npos)
1018                                 {
1019                                         std::string var = item.substr(0, equals);
1020                                         std::string value = item.substr(equals+1, item.length());
1021                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1022                                         CapKeys[var] = value;
1023                                 }
1024                         }
1025                 }
1026
1027                 return true;
1028         }
1029
1030         /** This function forces this server to quit, removing this server
1031          * and any users on it (and servers and users below that, etc etc).
1032          * It's very slow and pretty clunky, but luckily unless your network
1033          * is having a REAL bad hair day, this function shouldnt be called
1034          * too many times a month ;-)
1035          */
1036         void SquitServer(std::string &from, TreeServer* Current)
1037         {
1038                 /* recursively squit the servers attached to 'Current'.
1039                  * We're going backwards so we don't remove users
1040                  * while we still need them ;)
1041                  */
1042                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1043                 {
1044                         TreeServer* recursive_server = Current->GetChild(q);
1045                         this->SquitServer(from,recursive_server);
1046                 }
1047                 /* Now we've whacked the kids, whack self */
1048                 num_lost_servers++;
1049                 num_lost_users += Current->QuitUsers(from);
1050         }
1051
1052         /** This is a wrapper function for SquitServer above, which
1053          * does some validation first and passes on the SQUIT to all
1054          * other remaining servers.
1055          */
1056         void Squit(TreeServer* Current, const std::string &reason)
1057         {
1058                 if ((Current) && (Current != Utils->TreeRoot))
1059                 {
1060                         std::deque<std::string> params;
1061                         params.push_back(Current->GetName());
1062                         params.push_back(":"+reason);
1063                         Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1064                         if (Current->GetParent() == Utils->TreeRoot)
1065                         {
1066                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1067                         }
1068                         else
1069                         {
1070                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1071                         }
1072                         num_lost_servers = 0;
1073                         num_lost_users = 0;
1074                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1075                         SquitServer(from, Current);
1076                         Current->Tidy();
1077                         Current->GetParent()->DelChild(Current);
1078                         DELETE(Current);
1079                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1080                 }
1081                 else
1082                 {
1083                         Instance->Log(DEFAULT,"Squit from unknown server");
1084                 }
1085         }
1086
1087         /** FMODE command - server mode with timestamp checks */
1088         bool ForceMode(const std::string &source, std::deque<std::string> &params)
1089         {
1090                 /* Chances are this is a 1.0 FMODE without TS */
1091                 if (params.size() < 3)
1092                 {
1093                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
1094                         return false;
1095                 }
1096
1097                 bool smode = false;
1098                 std::string sourceserv;
1099
1100                 /* Are we dealing with an FMODE from a user, or from a server? */
1101                 userrec* who = this->Instance->FindNick(source);
1102                 if (who)
1103                 {
1104                         /* FMODE from a user, set sourceserv to the users server name */
1105                         sourceserv = who->server;
1106                 }
1107                 else
1108                 {
1109                         /* FMODE from a server, create a fake user to receive mode feedback */
1110                         who = new userrec(this->Instance);
1111                         who->SetFd(FD_MAGIC_NUMBER);
1112                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1113                         sourceserv = source;    /* Set sourceserv to the actual source string */
1114                 }
1115                 const char* modelist[64];
1116                 time_t TS = 0;
1117                 int n = 0;
1118                 memset(&modelist,0,sizeof(modelist));
1119                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1120                 {
1121                         if (q == 1)
1122                         {
1123                                 /* The timestamp is in this position.
1124                                  * We don't want to pass that up to the
1125                                  * server->client protocol!
1126                                  */
1127                                 TS = atoi(params[q].c_str());
1128                         }
1129                         else
1130                         {
1131                                 /* Everything else is fine to append to the modelist */
1132                                 modelist[n++] = params[q].c_str();
1133                         }
1134
1135                 }
1136                 /* Extract the TS value of the object, either userrec or chanrec */
1137                 userrec* dst = this->Instance->FindNick(params[0]);
1138                 chanrec* chan = NULL;
1139                 time_t ourTS = 0;
1140                 if (dst)
1141                 {
1142                         ourTS = dst->age;
1143                 }
1144                 else
1145                 {
1146                         chan = this->Instance->FindChan(params[0]);
1147                         if (chan)
1148                         {
1149                                 ourTS = chan->age;
1150                         }
1151                         else
1152                                 /* Oops, channel doesnt exist! */
1153                                 return true;
1154                 }
1155
1156                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1157                  * with parameters.
1158                  */
1159                 if (TS == ourTS)
1160                 {
1161                         Instance->Log(DEBUG,"Entering TS equality check");
1162                         ModeHandler* mh = NULL;
1163                         unsigned long paramptr = 3;
1164                         std::string to_bounce = "";
1165                         std::string to_keep = "";
1166                         std::vector<std::string> params_to_keep;
1167                         std::string params_to_bounce = "";
1168                         bool adding = true;
1169                         char cur_change = 1;
1170                         char old_change = 0;
1171                         char old_bounce_change = 0;
1172                         /* Merge modes, basically do special stuff to mode with params */
1173                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1174                         {
1175                                 switch (*x)
1176                                 {
1177                                         case '-':
1178                                                 adding = false;
1179                                         break;
1180                                         case '+':
1181                                                 adding = true;
1182                                         break;
1183                                         default:
1184                                                 if (adding)
1185                                                 {
1186                                                         /* We only care about whats being set,
1187                                                          * not whats being unset
1188                                                          */
1189                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1190
1191                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1192                                                         {
1193                                                                 /* We only want to do special things to
1194                                                                  * modes with parameters, we are going to rewrite
1195                                                                  * those parameters
1196                                                                  */
1197                                                                 ModePair ret;
1198                                                                 adding ? cur_change = '+' : cur_change = '-';
1199
1200                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1201
1202                                                                 /* The mode is set here, check which we should keep */
1203                                                                 if (ret.first)
1204                                                                 {
1205                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1206
1207                                                                         if (which_to_keep == true)
1208                                                                         {
1209                                                                                 /* Keep ours, bounce theirs:
1210                                                                                  * Send back ours to them and
1211                                                                                  * drop their mode changs
1212                                                                                  */
1213                                                                                 adding ? cur_change = '+' : cur_change = '-';
1214                                                                                 if (cur_change != old_bounce_change)
1215                                                                                         to_bounce += cur_change;
1216                                                                                 to_bounce += *x;
1217                                                                                 old_bounce_change = cur_change;
1218
1219                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1220                                                                                         params_to_bounce.append(" ").append(ret.second);
1221                                                                         }
1222                                                                         else
1223                                                                         {
1224                                                                                 /* Keep theirs: Accept their mode change,
1225                                                                                  * do nothing else
1226                                                                                  */
1227                                                                                 adding ? cur_change = '+' : cur_change = '-';
1228                                                                                 if (cur_change != old_change)
1229                                                                                         to_keep += cur_change;
1230                                                                                 to_keep += *x;
1231                                                                                 old_change = cur_change;
1232
1233                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1234                                                                                         params_to_keep.push_back(params[paramptr]);
1235                                                                         }
1236                                                                 }
1237                                                                 else
1238                                                                 {
1239                                                                         /* Mode isnt set here, we want it */
1240                                                                         adding ? cur_change = '+' : cur_change = '-';
1241                                                                         if (cur_change != old_change)
1242                                                                                 to_keep += cur_change;
1243                                                                         to_keep += *x;
1244                                                                         old_change = cur_change;
1245
1246                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1247                                                                                 params_to_keep.push_back(params[paramptr]);
1248                                                                 }
1249
1250                                                                 paramptr++;
1251                                                         }
1252                                                         else
1253                                                         {
1254                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1255
1256                                                                 if (mh)
1257                                                                 {
1258                                                                         adding ? cur_change = '+' : cur_change = '-';
1259
1260                                                                         /* Just keep this, safe to merge with no checks
1261                                                                          * it has no parameters
1262                                                                          */
1263
1264                                                                         if (cur_change != old_change)
1265                                                                                 to_keep += cur_change;
1266                                                                         to_keep += *x;
1267                                                                         old_change = cur_change;
1268
1269                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1270                                                                         {
1271                                                                                 Instance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1272                                                                                 params_to_keep.push_back(params[paramptr++]);
1273                                                                         }
1274                                                                 }
1275                                                         }
1276                                                 }
1277                                                 else
1278                                                 {
1279                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1280
1281                                                         if (mh)
1282                                                         {
1283                                                                 /* Taking a mode away */
1284                                                                 adding ? cur_change = '+' : cur_change = '-';
1285
1286                                                                 if (cur_change != old_change)
1287                                                                         to_keep += cur_change;
1288                                                                 to_keep += *x;
1289                                                                 old_change = cur_change;
1290
1291                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1292                                                                         params_to_keep.push_back(params[paramptr++]);
1293                                                         }
1294                                                 }
1295                                         break;
1296                                 }
1297                         }
1298
1299                         if (to_bounce.length())
1300                         {
1301                                 std::deque<std::string> newparams;
1302                                 newparams.push_back(params[0]);
1303                                 newparams.push_back(ConvToStr(ourTS));
1304                                 newparams.push_back(to_bounce+params_to_bounce);
1305                                 Instance->Log(DEBUG,"BOUNCE BACK: %s",(to_bounce+params_to_bounce).c_str());
1306                                 Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1307                         }
1308
1309                         if (to_keep.length())
1310                         {
1311                                 unsigned int n = 2;
1312                                 unsigned int q = 0;
1313                                 modelist[0] = params[0].c_str();
1314                                 modelist[1] = to_keep.c_str();
1315
1316                                 if (params_to_keep.size() > 0)
1317                                 {
1318                                         for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
1319                                         {
1320                                                 Instance->Log(DEBUG,"KEEP Item %d of %d: %s", q, params_to_keep.size(), params_to_keep[q].c_str());
1321                                                 modelist[n++] = params_to_keep[q].c_str();
1322                                         }
1323                                 }
1324
1325                                 if (smode)
1326                                 {
1327                                         Instance->Log(DEBUG,"Send mode");
1328                                         this->Instance->SendMode(modelist, n, who);
1329                                 }
1330                                 else
1331                                 {
1332                                         Instance->Log(DEBUG,"Send mode client");
1333                                         this->Instance->CallCommandHandler("MODE", modelist, n, who);
1334                                 }
1335
1336                                 /* HOT POTATO! PASS IT ON! */
1337                                 Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1338                         }
1339                 }
1340                 else
1341                 /* U-lined servers always win regardless of their TS */
1342                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1343                 {
1344                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1345                          * SHOULD accept it, if its clock is right.
1346                          *
1347                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1348                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1349                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1350                          *
1351                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1352                          * writing the code. It took me a while to come up with this solution.
1353                          *
1354                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1355                          */
1356
1357                         std::deque<std::string> newparams;      /* New parameter list we send back */
1358                         newparams.push_back(params[0]);         /* Target, user or channel */
1359                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1360                         newparams.push_back("");                /* This contains the mode string. For now
1361                                                                  * it's empty, we fill it below.
1362                                                                  */
1363
1364                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1365                          * set to avoid a desync here.
1366                          */
1367                         std::string modebounce = "";
1368                         bool adding = true;
1369                         unsigned int t = 3;
1370                         ModeHandler* mh = NULL;
1371                         char cur_change = 1;
1372                         char old_change = 0;
1373                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1374                         {
1375                                 /* Iterate over all mode chars in the sent set */
1376                                 switch (*x)
1377                                 {
1378                                         /* Adding or subtracting modes? */
1379                                         case '-':
1380                                                 adding = false;
1381                                         break;
1382                                         case '+':
1383                                                 adding = true;
1384                                         break;
1385                                         default:
1386                                                 /* Find the mode handler for this mode */
1387                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1388
1389                                                 /* Got a mode handler?
1390                                                  * This also prevents us bouncing modes we have no handler for.
1391                                                  */
1392                                                 if (mh)
1393                                                 {
1394                                                         ModePair ret;
1395                                                         std::string p = "";
1396
1397                                                         /* Does the mode require a parameter right now?
1398                                                          * If it does, fetch it if we can
1399                                                          */
1400                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1401                                                                 p = params[t++];
1402
1403                                                         /* Call the ModeSet method to determine if its set with the
1404                                                          * given parameter here or not.
1405                                                          */
1406                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1407
1408                                                         /* XXX: Really. Dont ask.
1409                                                          * Determine from if its set combined with what the current
1410                                                          * 'state' is (adding or not) as to wether we should 'invert'
1411                                                          * or 'reinforce' the mode change
1412                                                          */
1413                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1414
1415                                                         /* Quickly determine if we have 'flipped' from + to -,
1416                                                          * or - to +, to prevent unneccessary +/- chars in the
1417                                                          * output string that waste bandwidth
1418                                                          */
1419                                                         if (cur_change != old_change)
1420                                                                 modebounce += cur_change;
1421                                                         old_change = cur_change;
1422
1423                                                         /* Add the mode character to the output string */
1424                                                         modebounce += mh->GetModeChar();
1425
1426                                                         /* We got a parameter back from ModeHandler::ModeSet,
1427                                                          * are we supposed to be sending one out right now?
1428                                                          */
1429                                                         if (ret.second.length())
1430                                                         {
1431                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1432                                                                         /* Yes we're supposed to be sending out
1433                                                                          * the parameter. Make sure it goes
1434                                                                          */
1435                                                                         newparams.push_back(ret.second);
1436                                                         }
1437
1438                                                 }
1439                                         break;
1440                                 }
1441                         }
1442
1443                         /* Update the parameters for FMODE with the new 'bounced' string */
1444                         newparams[2] = modebounce;
1445                         /* Only send it back the way it came, no need to send it anywhere else */
1446                         Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1447                         Instance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1448                 }
1449                 else
1450                 {
1451                         Instance->Log(DEBUG,"Allow modes, TS lower for sender");
1452                         /* The server was ulined, but something iffy is up with the TS.
1453                          * Sound the alarm bells!
1454                          */
1455                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1456                         {
1457                                 this->Instance->WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",sourceserv.c_str(),params[0].c_str());
1458                         }
1459                         /* Allow the mode, route it to either server or user command handling */
1460                         if (smode)
1461                                 this->Instance->SendMode(modelist,n,who);
1462                         else
1463                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1464
1465                         /* HOT POTATO! PASS IT ON! */
1466                         Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1467                 }
1468                 /* Are we supposed to free the userrec? */
1469                 if (smode)
1470                         DELETE(who);
1471
1472                 return true;
1473         }
1474
1475         /** FTOPIC command */
1476         bool ForceTopic(const std::string &source, std::deque<std::string> &params)
1477         {
1478                 if (params.size() != 4)
1479                         return true;
1480                 time_t ts = atoi(params[1].c_str());
1481                 std::string nsource = source;
1482
1483                 chanrec* c = this->Instance->FindChan(params[0]);
1484                 if (c)
1485                 {
1486                         if ((ts >= c->topicset) || (!*c->topic))
1487                         {
1488                                 std::string oldtopic = c->topic;
1489                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1490                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1491                                 c->topicset = ts;
1492                                 /* if the topic text is the same as the current topic,
1493                                  * dont bother to send the TOPIC command out, just silently
1494                                  * update the set time and set nick.
1495                                  */
1496                                 if (oldtopic != params[3])
1497                                 {
1498                                         userrec* user = this->Instance->FindNick(source);
1499                                         if (!user)
1500                                         {
1501                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1502                                         }
1503                                         else
1504                                         {
1505                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1506                                                 nsource = user->server;
1507                                         }
1508                                         /* all done, send it on its way */
1509                                         params[3] = ":" + params[3];
1510                                         Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
1511                                 }
1512                         }
1513
1514                 }
1515
1516                 return true;
1517         }
1518
1519         /** FJOIN, similar to TS6 SJOIN, but not quite. */
1520         bool ForceJoin(const std::string &source, std::deque<std::string> &params)
1521         {
1522                 /* 1.1 FJOIN works as follows:
1523                  *
1524                  * Each FJOIN is sent along with a timestamp, and the side with the lowest
1525                  * timestamp 'wins'. From this point on we will refer to this side as the
1526                  * winner. The side with the higher timestamp loses, from this point on we
1527                  * will call this side the loser or losing side. This should be familiar to
1528                  * anyone who's dealt with dreamforge or TS6 before.
1529                  *
1530                  * When two sides of a split heal and this occurs, the following things
1531                  * will happen:
1532                  *
1533                  * If the timestamps are exactly equal, both sides merge their privilages
1534                  * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
1535                  * re-created during a split, this is safe to do.
1536                  *
1537                  *
1538                  * If the timestamps are NOT equal, the losing side removes all privilage
1539                  * modes from all of its users that currently exist in the channel, before
1540                  * introducing new users into the channel which are listed in the FJOIN
1541                  * command's parameters. This means, all modes +ohv, and privilages added
1542                  * by modules, such as +qa. The losing side then LOWERS its timestamp value
1543                  * of the channel to match that of the winning side, and the modes of the
1544                  * users of the winning side are merged in with the losing side. The loser
1545                  * then sends out a set of FMODE commands which 'confirm' that it just
1546                  * removed all privilage modes from its existing users, which allows for
1547                  * services packages to still work correctly without needing to know the
1548                  * timestamping rules which InspIRCd follows. In TS6 servers this is always
1549                  * a problem, and services packages must contain code which explicitly
1550                  * behaves as TS6 does, removing ops from the losing side of a split where
1551                  * neccessary within its internal records, as this state information is
1552                  * not explicitly echoed out in that protocol.
1553                  *
1554                  * The winning side on the other hand will ignore all user modes from the
1555                  * losing side, so only its own modes get applied. Life is simple for those
1556                  * who succeed at internets. :-)
1557                  *
1558                  * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
1559                  * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
1560                  * you ask? Well, quite simply because we don't need to. They'll be sent
1561                  * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
1562                  * the losing side sends any modes for the channel which shouldnt win,
1563                  * they wont as their timestamp will be too high :-)
1564                  */
1565
1566                 if (params.size() < 3)
1567                         return true;
1568
1569                 char first[MAXBUF];             /* The first parameter of the mode command */
1570                 char modestring[MAXBUF];        /* The mode sequence (2nd parameter) of the mode command */
1571                 char* mode_users[127];          /* The values used by the mode command */
1572                 memset(&mode_users,0,sizeof(mode_users));       /* Initialize mode parameters */
1573                 mode_users[0] = first;          /* Set this up to be our on-stack value */
1574                 mode_users[1] = modestring;     /* Same here as above */
1575                 strcpy(modestring,"+");         /* Initialize the mode sequence to just '+' */
1576                 unsigned int modectr = 2;       /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */
1577
1578                 userrec* who = NULL;                    /* User we are currently checking */
1579                 std::string channel = params[0];        /* Channel name, as a string */
1580                 time_t TS = atoi(params[1].c_str());    /* Timestamp given to us for remote side */
1581
1582                 /* Try and find the channel */
1583                 chanrec* chan = this->Instance->FindChan(channel);
1584
1585                 /* Initialize channel name in the mode parameters */
1586                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1587
1588                 /* default TS is a high value, which if we dont have this
1589                  * channel will let the other side apply their modes.
1590                  */
1591                 time_t ourTS = time(NULL)+600;
1592
1593                 /* Does this channel exist? if it does, get its REAL timestamp */
1594                 if (chan)
1595                         ourTS = chan->age;
1596
1597                 /* In 1.1, if they have the newer channel, we immediately clear
1598                  * all status modes from our users. We then accept their modes.
1599                  * If WE have the newer channel its the other side's job to do this.
1600                  * Note that this causes the losing server to send out confirming
1601                  * FMODE lines.
1602                  */
1603                 if (ourTS > TS)
1604                 {
1605                         std::deque<std::string> param_list;
1606
1607                         if (chan)
1608                                 chan->age = TS;
1609
1610                         /* Lower the TS here */
1611                         if (Utils->AnnounceTSChange && chan)
1612                                 chan->WriteChannelWithServ(Instance->Config->ServerName,
1613                                 "TS for %s changed from %lu to %lu", chan->name, ourTS, TS);
1614                         ourTS = TS;
1615
1616                         param_list.push_back(channel);
1617                         /* Zap all the privilage modes on our side */
1618                         this->RemoveStatus(Instance->Config->ServerName, param_list);
1619                 }
1620
1621                 /* Put the final parameter of the FJOIN into a tokenstream ready to split it */
1622                 irc::tokenstream users(params[2]);
1623                 std::string item = "*";
1624
1625                 /* do this first, so our mode reversals are correctly received by other servers
1626                  * if there is a TS collision.
1627                  */
1628                 params[2] = ":" + params[2];
1629                 Utils->DoOneToAllButSender(source,"FJOIN",params,source);
1630
1631                 /* Now, process every 'prefixes,nick' pair */
1632                 while (item != "")
1633                 {
1634                         /* Find next user */
1635                         item = users.GetToken();
1636
1637                         const char* usr = item.c_str();
1638
1639                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1640                          * (is this even possible?) */
1641                         if (usr && *usr)
1642                         {
1643                                 const char* permissions = usr;
1644                                 int ntimes = 0;
1645                                 char* nm = new char[MAXBUF];
1646                                 char* tnm = nm;
1647
1648                                 /* Iterate through all the prefix values, convert them from prefixes
1649                                  * to mode letters, and append them to the mode sequence
1650                                  */
1651                                 while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
1652                                 {
1653                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1654                                         if (mh)
1655                                         {
1656                                                 /* This is a valid prefix */
1657                                                 ntimes++;
1658                                                 *tnm++ = mh->GetModeChar();
1659                                         }
1660                                         else
1661                                         {
1662                                                 /* Not a valid prefix...
1663                                                  * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
1664                                                  */
1665                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
1666                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
1667                                                 return false;
1668                                         }
1669                                         usr++;
1670                                         permissions++;
1671                                 }
1672
1673                                 /* Null terminate modes */
1674                                 *tnm = 0;
1675                                 /* Advance past the comma, to the nick */
1676                                 usr++;
1677
1678                                 /* Check the user actually exists */
1679                                 who = this->Instance->FindNick(usr);
1680                                 if (who)
1681                                 {
1682                                         /* Did they get any modes? How many times? */
1683                                         strlcat(modestring, nm, MAXBUF);
1684                                         for (int k = 0; k < ntimes; k++)
1685                                                 mode_users[modectr++] = strdup(usr);
1686
1687                                         /* Free temporary buffer used for mode sequence */
1688                                         delete[] nm;
1689
1690                                         /* Check that the user's 'direction' is correct
1691                                          * based on the server sending the FJOIN. We must
1692                                          * check each nickname in turn, because the origin of
1693                                          * the FJOIN may be different to the origin of the nicks
1694                                          * in the command itself.
1695                                          */
1696                                         TreeServer* route_back_again = Utils->BestRouteTo(who->server);
1697                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
1698                                         {
1699                                                 /* Oh dear oh dear. */
1700                                                 Instance->Log(DEBUG,"Fake direction in FJOIN, user '%s'",who->nick);
1701                                                 continue;
1702                                         }
1703                                         /* Finally, we can actually place the user into the channel.
1704                                          * We're sure its right. Final answer, phone a friend.
1705                                          */
1706                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
1707
1708                                         /* Have we already queued up MAXMODES modes with parameters
1709                                          * (+qaohv) ready to be sent to the server?
1710                                          */
1711                                         if (modectr >= (MAXMODES-1))
1712                                         {
1713                                                 /* Only actually give the users any status if we lost
1714                                                  * the FJOIN or drew (equal timestamps).
1715                                                  * It isn't actually possible for ourTS to be > TS here,
1716                                                  * only possible to actually have ourTS == TS, or
1717                                                  * ourTS < TS, because if we lost, we already lowered
1718                                                  * our TS above before we entered this loop. We only
1719                                                  * check >= as a safety measure, in case someone stuffed
1720                                                  * up. If someone DID stuff up, it was most likely me.
1721                                                  * Note: I do not like baseball bats in the face...
1722                                                  */
1723                                                 if (ourTS >= TS)
1724                                                 {
1725                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1726                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1727
1728                                                         /* Something stuffed up, and for some reason, the timestamp is
1729                                                          * NOT lowered right now and should be. Lower it. Usually this
1730                                                          * code won't be executed, doubtless someone will remove it some
1731                                                          * day soon.
1732                                                          */
1733                                                         if (ourTS > TS)
1734                                                         {
1735                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1736                                                                 chan->age = TS;
1737                                                                 ourTS = TS;
1738                                                         }
1739                                                 }
1740
1741                                                 /* Reset all this back to defaults, and
1742                                                  * free any ram we have left allocated.
1743                                                  */
1744                                                 strcpy(mode_users[1],"+");
1745                                                 for (unsigned int f = 2; f < modectr; f++)
1746                                                         free(mode_users[f]);
1747                                                 modectr = 2;
1748                                         }
1749                                 }
1750                                 else
1751                                 {
1752                                         /* Remember to free this */
1753                                         delete[] nm;
1754                                         /* If we got here, there's a nick in FJOIN which doesnt exist on this server.
1755                                          * We don't try to process the nickname here (that WOULD cause a segfault because
1756                                          * we'd be playing with null pointers) however, we DO pass the nickname on, just
1757                                          * in case somehow we're desynched, so that other users which might be able to see
1758                                          * the nickname get their fair chance to process it.
1759                                          */
1760                                         Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
1761                                         continue;
1762                                 }
1763                         }
1764                 }
1765
1766                 /* there werent enough modes built up to flush it during FJOIN,
1767                  * or, there are a number left over. flush them out.
1768                  */
1769                 if ((modectr > 2) && (who) && (chan))
1770                 {
1771                         if (ourTS >= TS)
1772                         {
1773                                 /* Our channel is newer than theirs. Evil deeds must be afoot. */
1774                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1775                                 /* Yet again, we can't actually get a true value here, if everything else
1776                                  * is working as it should.
1777                                  */
1778                                 if (ourTS > TS)
1779                                 {
1780                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1781                                         chan->age = TS;
1782                                         ourTS = TS;
1783                                 }
1784                         }
1785
1786                         /* Free anything we have left to free */
1787                         for (unsigned int f = 2; f < modectr; f++)
1788                                 free(mode_users[f]);
1789                 }
1790
1791                 /* All done. That wasnt so bad was it, you can wipe
1792                  * the sweat from your forehead now. :-)
1793                  */
1794                 return true;
1795         }
1796
1797         /** NICK command */
1798         bool IntroduceClient(const std::string &source, std::deque<std::string> &params)
1799         {
1800                 if (params.size() < 8)
1801                         return true;
1802                 if (params.size() > 8)
1803                 {
1804                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1805                         return true;
1806                 }
1807                 // NICK age nick host dhost ident +modes ip :gecos
1808                 //       0    1   2     3     4      5   6     7
1809                 time_t age = atoi(params[0].c_str());
1810
1811                 /* This used to have a pretty craq'y loop doing the same thing,
1812                  * now we just let the STL do the hard work (more efficiently)
1813                  */
1814                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1815                 if (pos_after_plus != std::string::npos)
1816                         params[5] = params[5].substr(pos_after_plus);
1817
1818                 const char* tempnick = params[1].c_str();
1819                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1820
1821                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1822
1823                 if (iter != this->Instance->clientlist.end())
1824                 {
1825                         // nick collision
1826                         Instance->Log(DEBUG,"Nick collision on %s!%s@%s: %lu %lu",tempnick,params[4].c_str(),params[2].c_str(),(unsigned long)age,(unsigned long)iter->second->age);
1827                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1828                         userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
1829                         return true;
1830                 }
1831
1832                 userrec* _new = new userrec(this->Instance);
1833                 this->Instance->clientlist[tempnick] = _new;
1834                 _new->SetFd(FD_MAGIC_NUMBER);
1835                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1836                 strlcpy(_new->host, params[2].c_str(),63);
1837                 strlcpy(_new->dhost, params[3].c_str(),63);
1838                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1839                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1840                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1841                 _new->registered = REG_ALL;
1842                 _new->signon = age;
1843
1844                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1845                         _new->modes[(*v)-65] = 1;
1846
1847 #ifdef SUPPORT_IP6LINKS
1848                 if (params[6].find_first_of(":") != std::string::npos)
1849                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1850                 else
1851 #endif
1852                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1853
1854                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1855
1856                 params[7] = ":" + params[7];
1857                 Utils->DoOneToAllButSender(source,"NICK",params,source);
1858
1859                 // Increment the Source Servers User Count..
1860                 TreeServer* SourceServer = Utils->FindServer(source);
1861                 if (SourceServer)
1862                 {
1863                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1864                         SourceServer->AddUserCount();
1865                 }
1866
1867                 FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
1868
1869                 return true;
1870         }
1871
1872         /** Send one or more FJOINs for a channel of users.
1873          * If the length of a single line is more than 480-NICKMAX
1874          * in length, it is split over multiple lines.
1875          */
1876         void SendFJoins(TreeServer* Current, chanrec* c)
1877         {
1878                 std::string buffer;
1879
1880                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1881                 char list[MAXBUF];
1882                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1883
1884                 size_t dlen, curlen;
1885                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1886                 int numusers = 0;
1887                 char* ptr = list + dlen;
1888
1889                 CUList *ulist = c->GetUsers();
1890                 std::string modes = "";
1891                 std::string params = "";
1892
1893                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1894                 {
1895                         // The first parameter gets a : before it
1896                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1897
1898                         curlen += ptrlen;
1899                         ptr += ptrlen;
1900
1901                         numusers++;
1902
1903                         if (curlen > (480-NICKMAX))
1904                         {
1905                                 buffer.append(list).append("\n");
1906
1907                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1908                                 ptr = list + dlen;
1909                                 ptrlen = 0;
1910                                 numusers = 0;
1911                         }
1912                 }
1913
1914                 if (numusers)
1915                         buffer.append(list).append("\n");
1916
1917                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1918                 {
1919                         modes.append("b");
1920                         params.append(" ").append(b->data);
1921                         if (params.length() >= MAXMODES)
1922                         {
1923                                 /* Wrap at MAXMODES */
1924                                 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\n");
1925                                 modes = "";
1926                                 params = "";
1927                         }
1928                 }
1929                 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(ConvToStr(c->age)).append(" +").append(c->ChanModes(true));
1930                 /* Only send these if there are any */
1931                 if (!modes.empty())
1932                         buffer.append("\n").append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(ConvToStr(c->age)).append(" +").append(modes).append(params);
1933
1934                 this->WriteLine(buffer);
1935         }
1936
1937         /** Send G, Q, Z and E lines */
1938         void SendXLines(TreeServer* Current)
1939         {
1940                 char data[MAXBUF];
1941                 std::string buffer;
1942                 std::string n = this->Instance->Config->ServerName;
1943                 const char* sn = n.c_str();
1944                 int iterations = 0;
1945                 /* Yes, these arent too nice looking, but they get the job done */
1946                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1947                 {
1948                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1949                         buffer.append(data);
1950                 }
1951                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1952                 {
1953                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1954                         buffer.append(data);
1955                 }
1956                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1957                 {
1958                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s\n",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1959                         buffer.append(data);
1960                 }
1961                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1962                 {
1963                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s\n",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1964                         buffer.append(data);
1965                 }
1966                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1967                 {
1968                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1969                         buffer.append(data);
1970                 }
1971                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1972                 {
1973                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1974                         buffer.append(data);
1975                 }
1976                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1977                 {
1978                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s\n",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1979                         buffer.append(data);
1980                 }
1981                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1982                 {
1983                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s\n",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1984                         buffer.append(data);
1985                 }
1986
1987                 if (!buffer.empty())
1988                         this->WriteLine(buffer);
1989         }
1990
1991         /** Send channel modes and topics */
1992         void SendChannelModes(TreeServer* Current)
1993         {
1994                 char data[MAXBUF];
1995                 std::deque<std::string> list;
1996                 int iterations = 0;
1997                 std::string n = this->Instance->Config->ServerName;
1998                 const char* sn = n.c_str();
1999                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
2000                 {
2001                         SendFJoins(Current, c->second);
2002                         if (*c->second->topic)
2003                         {
2004                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
2005                                 this->WriteLine(data);
2006                         }
2007                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
2008                         list.clear();
2009                         c->second->GetExtList(list);
2010                         for (unsigned int j = 0; j < list.size(); j++)
2011                         {
2012                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
2013                         }
2014                 }
2015         }
2016
2017         /** send all users and their oper state/modes */
2018         void SendUsers(TreeServer* Current)
2019         {
2020                 char data[MAXBUF];
2021                 std::deque<std::string> list;
2022                 std::string dataline;
2023                 int iterations = 0;
2024                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
2025                 {
2026                         if (u->second->registered == REG_ALL)
2027                         {
2028                                 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);
2029                                 this->WriteLine(data);
2030                                 if (*u->second->oper)
2031                                 {
2032                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->nick, u->second->oper);
2033                                         this->WriteLine(data);
2034                                 }
2035                                 if (*u->second->awaymsg)
2036                                 {
2037                                         snprintf(data,MAXBUF,":%s AWAY :%s", u->second->nick, u->second->awaymsg);
2038                                         this->WriteLine(data);
2039                                 }
2040                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
2041                                 list.clear();
2042                                 u->second->GetExtList(list);
2043                                 for (unsigned int j = 0; j < list.size(); j++)
2044                                 {
2045                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
2046                                 }
2047                         }
2048                 }
2049         }
2050
2051         /** This function is called when we want to send a netburst to a local
2052          * server. There is a set order we must do this, because for example
2053          * users require their servers to exist, and channels require their
2054          * users to exist. You get the idea.
2055          */
2056         void DoBurst(TreeServer* s)
2057         {
2058                 std::string burst = "BURST "+ConvToStr(time(NULL));
2059                 std::string endburst = "ENDBURST";
2060                 // Because by the end of the netburst, it  could be gone!
2061                 std::string name = s->GetName();
2062                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
2063                 this->WriteLine(burst);
2064                 /* send our version string */
2065                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
2066                 /* Send server tree */
2067                 this->SendServers(Utils->TreeRoot,s,1);
2068                 /* Send users and their oper status */
2069                 this->SendUsers(s);
2070                 /* Send everything else (channel modes, xlines etc) */
2071                 this->SendChannelModes(s);
2072                 this->SendXLines(s);
2073                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
2074                 this->WriteLine(endburst);
2075                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
2076         }
2077
2078         /** This function is called when we receive data from a remote
2079          * server. We buffer the data in a std::string (it doesnt stay
2080          * there for long), reading using InspSocket::Read() which can
2081          * read up to 16 kilobytes in one operation.
2082          *
2083          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
2084          * THE SOCKET OBJECT FOR US.
2085          */
2086         virtual bool OnDataReady()
2087         {
2088                 char* data = this->Read();
2089                 /* Check that the data read is a valid pointer and it has some content */
2090                 if (data && *data)
2091                 {
2092                         this->in_buffer.append(data);
2093                         /* While there is at least one new line in the buffer,
2094                          * do something useful (we hope!) with it.
2095                          */
2096                         while (in_buffer.find("\n") != std::string::npos)
2097                         {
2098                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
2099                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
2100                                 /* Use rfind here not find, as theres more
2101                                  * chance of the \r being near the end of the
2102                                  * string, not the start.
2103                                  */
2104                                 if (ret.find("\r") != std::string::npos)
2105                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
2106                                 /* Process this one, abort if it
2107                                  * didnt return true.
2108                                  */
2109                                 if (this->ctx_in)
2110                                 {
2111                                         char out[1024];
2112                                         char result[1024];
2113                                         memset(result,0,1024);
2114                                         memset(out,0,1024);
2115                                         /* ERROR + CAPAB is still allowed unencryped */
2116                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
2117                                         {
2118                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
2119                                                 if ((nbytes > 0) && (nbytes < 1024))
2120                                                 {
2121                                                         ctx_in->Decrypt(out, result, nbytes, 0);
2122                                                         for (int t = 0; t < nbytes; t++)
2123                                                         {
2124                                                                 if (result[t] == '\7')
2125                                                                 {
2126                                                                         /* We only need to stick a \0 on the
2127                                                                          * first \7, the rest will be lost
2128                                                                          */
2129                                                                         result[t] = 0;
2130                                                                         break;
2131                                                                 }
2132                                                         }
2133                                                         ret = result;
2134                                                 }
2135                                         }
2136                                 }
2137                                 if (!this->ProcessLine(ret))
2138                                 {
2139                                         return false;
2140                                 }
2141                         }
2142                         return true;
2143                 }
2144                 /* EAGAIN returns an empty but non-NULL string, so this
2145                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2146                  */
2147                 return (data && !*data);
2148         }
2149
2150         int WriteLine(std::string line)
2151         {
2152                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2153                 if (this->ctx_out)
2154                 {
2155                         char result[10240];
2156                         char result64[10240];
2157                         if (this->keylength)
2158                         {
2159                                 // pad it to the key length
2160                                 int n = this->keylength - (line.length() % this->keylength);
2161                                 if (n)
2162                                         line.append(n,'\7');
2163                         }
2164                         unsigned int ll = line.length();
2165                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2166                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2167                         line = result64;
2168                 }
2169                 line.append("\r\n");
2170                 return this->Write(line);
2171         }
2172
2173         /* Handle ERROR command */
2174         bool Error(std::deque<std::string> &params)
2175         {
2176                 if (params.size() < 1)
2177                         return false;
2178                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2179                 /* we will return false to cause the socket to close. */
2180                 return false;
2181         }
2182
2183         /** remote MOTD. leet, huh? */
2184         bool Motd(const std::string &prefix, std::deque<std::string> &params)
2185         {
2186                 if (params.size() > 0)
2187                 {
2188                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2189                         {
2190                                 /* It's for our server */
2191                                 string_list results;
2192                                 userrec* source = this->Instance->FindNick(prefix);
2193
2194                                 if (source)
2195                                 {
2196                                         std::deque<std::string> par;
2197                                         par.push_back(prefix);
2198                                         par.push_back("");
2199
2200                                         if (!Instance->Config->MOTD.size())
2201                                         {
2202                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2203                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2204                                                 return true;
2205                                         }
2206
2207                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2208                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2209
2210                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2211                                         {
2212                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2213                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2214                                         }
2215
2216                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2217                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2218                                 }
2219                         }
2220                         else
2221                         {
2222                                 /* Pass it on */
2223                                 userrec* source = this->Instance->FindNick(prefix);
2224                                 if (source)
2225                                         Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
2226                         }
2227                 }
2228                 return true;
2229         }
2230
2231         /** remote ADMIN. leet, huh? */
2232         bool Admin(const std::string &prefix, std::deque<std::string> &params)
2233         {
2234                 if (params.size() > 0)
2235                 {
2236                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2237                         {
2238                                 /* It's for our server */
2239                                 string_list results;
2240                                 userrec* source = this->Instance->FindNick(prefix);
2241
2242                                 if (source)
2243                                 {
2244                                         std::deque<std::string> par;
2245                                         par.push_back(prefix);
2246                                         par.push_back("");
2247
2248                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2249                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2250
2251                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2252                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2253
2254                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2255                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2256
2257                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2258                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2259                                 }
2260                         }
2261                         else
2262                         {
2263                                 /* Pass it on */
2264                                 userrec* source = this->Instance->FindNick(prefix);
2265                                 if (source)
2266                                         Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
2267                         }
2268                 }
2269                 return true;
2270         }
2271
2272         bool Stats(const std::string &prefix, std::deque<std::string> &params)
2273         {
2274                 /* Get the reply to a STATS query if it matches this servername,
2275                  * and send it back as a load of PUSH queries
2276                  */
2277                 if (params.size() > 1)
2278                 {
2279                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2280                         {
2281                                 /* It's for our server */
2282                                 string_list results;
2283                                 userrec* source = this->Instance->FindNick(prefix);
2284                                 if (source)
2285                                 {
2286                                         std::deque<std::string> par;
2287                                         par.push_back(prefix);
2288                                         par.push_back("");
2289                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2290                                         for (size_t i = 0; i < results.size(); i++)
2291                                         {
2292                                                 par[1] = "::" + results[i];
2293                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2294                                         }
2295                                 }
2296                         }
2297                         else
2298                         {
2299                                 /* Pass it on */
2300                                 userrec* source = this->Instance->FindNick(prefix);
2301                                 if (source)
2302                                         Utils->DoOneToOne(prefix, "STATS", params, params[1]);
2303                         }
2304                 }
2305                 return true;
2306         }
2307
2308
2309         /** Because the core won't let users or even SERVERS set +o,
2310          * we use the OPERTYPE command to do this.
2311          */
2312         bool OperType(const std::string &prefix, std::deque<std::string> &params)
2313         {
2314                 if (params.size() != 1)
2315                 {
2316                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2317                         return true;
2318                 }
2319                 std::string opertype = params[0];
2320                 userrec* u = this->Instance->FindNick(prefix);
2321                 if (u)
2322                 {
2323                         u->modes[UM_OPERATOR] = 1;
2324                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2325                         Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2326                 }
2327                 return true;
2328         }
2329
2330         /** Because Andy insists that services-compatible servers must
2331          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2332          */
2333         bool ForceNick(const std::string &prefix, std::deque<std::string> &params)
2334         {
2335                 if (params.size() < 3)
2336                         return true;
2337
2338                 userrec* u = this->Instance->FindNick(params[0]);
2339
2340                 if (u)
2341                 {
2342                         Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2343                         if (IS_LOCAL(u))
2344                         {
2345                                 std::deque<std::string> par;
2346                                 par.push_back(params[1]);
2347                                 /* This is not required as one is sent in OnUserPostNick below
2348                                  */
2349                                 //Utils->DoOneToMany(u->nick,"NICK",par);
2350                                 if (!u->ForceNickChange(params[1].c_str()))
2351                                 {
2352                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2353                                         return true;
2354                                 }
2355                                 u->age = atoi(params[2].c_str());
2356                         }
2357                 }
2358                 return true;
2359         }
2360
2361         bool ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
2362         {
2363                 if (params.size() < 2)
2364                         return true;
2365
2366                 userrec* u = this->Instance->FindNick(params[0]);
2367
2368                 if (u)
2369                 {
2370                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2371                         Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2372                 }
2373                 return true;
2374         }
2375
2376         bool RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
2377         {
2378                 if (params.size() < 1)
2379                         return false;
2380
2381                 std::string servermask = params[0];
2382
2383                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2384                 {
2385                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2386                         this->Instance->RehashServer();
2387                         Utils->ReadConfiguration(false);
2388                         InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
2389                 }
2390                 Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
2391                 return true;
2392         }
2393
2394         bool RemoteKill(const std::string &prefix, std::deque<std::string> &params)
2395         {
2396                 if (params.size() != 2)
2397                         return true;
2398
2399                 std::string nick = params[0];
2400                 userrec* u = this->Instance->FindNick(prefix);
2401                 userrec* who = this->Instance->FindNick(nick);
2402
2403                 if (who)
2404                 {
2405                         /* Prepend kill source, if we don't have one */
2406                         std::string sourceserv = prefix;
2407                         if (u)
2408                         {
2409                                 sourceserv = u->server;
2410                         }
2411                         if (*(params[1].c_str()) != '[')
2412                         {
2413                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2414                         }
2415                         std::string reason = params[1];
2416                         params[1] = ":" + params[1];
2417                         Utils->DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2418                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2419                         userrec::QuitUser(this->Instance,who,reason);
2420                 }
2421                 return true;
2422         }
2423
2424         bool LocalPong(const std::string &prefix, std::deque<std::string> &params)
2425         {
2426                 if (params.size() < 1)
2427                         return true;
2428
2429                 if (params.size() == 1)
2430                 {
2431                         TreeServer* ServerSource = Utils->FindServer(prefix);
2432                         if (ServerSource)
2433                         {
2434                                 ServerSource->SetPingFlag();
2435                         }
2436                 }
2437                 else
2438                 {
2439                         std::string forwardto = params[1];
2440                         if (forwardto == this->Instance->Config->ServerName)
2441                         {
2442                                 /*
2443                                  * this is a PONG for us
2444                                  * if the prefix is a user, check theyre local, and if they are,
2445                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2446                                  * Services might want to send these s->s, but we dont need to yet.
2447                                  */
2448                                 userrec* u = this->Instance->FindNick(prefix);
2449
2450                                 if (u)
2451                                 {
2452                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2453                                 }
2454                         }
2455                         else
2456                         {
2457                                 // not for us, pass it on :)
2458                                 Utils->DoOneToOne(prefix,"PONG",params,forwardto);
2459                         }
2460                 }
2461
2462                 return true;
2463         }
2464
2465         bool MetaData(const std::string &prefix, std::deque<std::string> &params)
2466         {
2467                 if (params.size() < 3)
2468                         return true;
2469
2470                 TreeServer* ServerSource = Utils->FindServer(prefix);
2471
2472                 if (ServerSource)
2473                 {
2474                         if (params[0] == "*")
2475                         {
2476                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2477                         }
2478                         else if (*(params[0].c_str()) == '#')
2479                         {
2480                                 chanrec* c = this->Instance->FindChan(params[0]);
2481                                 if (c)
2482                                 {
2483                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2484                                 }
2485                         }
2486                         else if (*(params[0].c_str()) != '#')
2487                         {
2488                                 userrec* u = this->Instance->FindNick(params[0]);
2489                                 if (u)
2490                                 {
2491                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2492                                 }
2493                         }
2494                 }
2495
2496                 params[2] = ":" + params[2];
2497                 Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
2498                 return true;
2499         }
2500
2501         bool ServerVersion(const std::string &prefix, std::deque<std::string> &params)
2502         {
2503                 if (params.size() < 1)
2504                         return true;
2505
2506                 TreeServer* ServerSource = Utils->FindServer(prefix);
2507
2508                 if (ServerSource)
2509                 {
2510                         ServerSource->SetVersion(params[0]);
2511                 }
2512                 params[0] = ":" + params[0];
2513                 Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
2514                 return true;
2515         }
2516
2517         bool ChangeHost(const std::string &prefix, std::deque<std::string> &params)
2518         {
2519                 if (params.size() < 1)
2520                         return true;
2521
2522                 userrec* u = this->Instance->FindNick(prefix);
2523
2524                 if (u)
2525                 {
2526                         u->ChangeDisplayedHost(params[0].c_str());
2527                         Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
2528                 }
2529                 return true;
2530         }
2531
2532         bool AddLine(const std::string &prefix, std::deque<std::string> &params)
2533         {
2534                 if (params.size() < 6)
2535                         return true;
2536
2537                 bool propogate = false;
2538
2539                 switch (*(params[0].c_str()))
2540                 {
2541                         case 'Z':
2542                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2543                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2544                         break;
2545                         case 'Q':
2546                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2547                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2548                         break;
2549                         case 'E':
2550                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2551                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2552                         break;
2553                         case 'G':
2554                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2555                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2556                         break;
2557                         case 'K':
2558                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2559                         break;
2560                         default:
2561                                 /* Just in case... */
2562                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2563                                 propogate = false;
2564                         break;
2565                 }
2566
2567                 /* Send it on its way */
2568                 if (propogate)
2569                 {
2570                         if (atoi(params[4].c_str()))
2571                         {
2572                                 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());
2573                         }
2574                         else
2575                         {
2576                                 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());
2577                         }
2578                         params[5] = ":" + params[5];
2579                         Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2580                 }
2581                 if (!this->bursting)
2582                 {
2583                         Instance->Log(DEBUG,"Applying lines...");
2584                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2585                 }
2586                 return true;
2587         }
2588
2589         bool ChangeName(const std::string &prefix, std::deque<std::string> &params)
2590         {
2591                 if (params.size() < 1)
2592                         return true;
2593
2594                 userrec* u = this->Instance->FindNick(prefix);
2595
2596                 if (u)
2597                 {
2598                         u->ChangeName(params[0].c_str());
2599                         params[0] = ":" + params[0];
2600                         Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
2601                 }
2602                 return true;
2603         }
2604
2605         bool Whois(const std::string &prefix, std::deque<std::string> &params)
2606         {
2607                 if (params.size() < 1)
2608                         return true;
2609
2610                 Instance->Log(DEBUG,"In IDLE command");
2611                 userrec* u = this->Instance->FindNick(prefix);
2612
2613                 if (u)
2614                 {
2615                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2616                         // an incoming request
2617                         if (params.size() == 1)
2618                         {
2619                                 userrec* x = this->Instance->FindNick(params[0]);
2620                                 if ((x) && (IS_LOCAL(x)))
2621                                 {
2622                                         userrec* x = this->Instance->FindNick(params[0]);
2623                                         char signon[MAXBUF];
2624                                         char idle[MAXBUF];
2625
2626                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2627                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2628                                         std::deque<std::string> par;
2629                                         par.push_back(prefix);
2630                                         par.push_back(signon);
2631                                         par.push_back(idle);
2632                                         // ours, we're done, pass it BACK
2633                                         Utils->DoOneToOne(params[0],"IDLE",par,u->server);
2634                                 }
2635                                 else
2636                                 {
2637                                         // not ours pass it on
2638                                         Utils->DoOneToOne(prefix,"IDLE",params,x->server);
2639                                 }
2640                         }
2641                         else if (params.size() == 3)
2642                         {
2643                                 std::string who_did_the_whois = params[0];
2644                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2645                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2646                                 {
2647                                         // an incoming reply to a whois we sent out
2648                                         std::string nick_whoised = prefix;
2649                                         unsigned long signon = atoi(params[1].c_str());
2650                                         unsigned long idle = atoi(params[2].c_str());
2651                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2652                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2653                                 }
2654                                 else
2655                                 {
2656                                         // not ours, pass it on
2657                                         Utils->DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2658                                 }
2659                         }
2660                 }
2661                 return true;
2662         }
2663
2664         bool Push(const std::string &prefix, std::deque<std::string> &params)
2665         {
2666                 if (params.size() < 2)
2667                         return true;
2668
2669                 userrec* u = this->Instance->FindNick(params[0]);
2670
2671                 if (!u)
2672                         return true;
2673
2674                 if (IS_LOCAL(u))
2675                 {
2676                         u->Write(params[1]);
2677                 }
2678                 else
2679                 {
2680                         // continue the raw onwards
2681                         params[1] = ":" + params[1];
2682                         Utils->DoOneToOne(prefix,"PUSH",params,u->server);
2683                 }
2684                 return true;
2685         }
2686
2687         bool Time(const std::string &prefix, std::deque<std::string> &params)
2688         {
2689                 // :source.server TIME remote.server sendernick
2690                 // :remote.server TIME source.server sendernick TS
2691                 if (params.size() == 2)
2692                 {
2693                         // someone querying our time?
2694                         if (this->Instance->Config->ServerName == params[0])
2695                         {
2696                                 userrec* u = this->Instance->FindNick(params[1]);
2697                                 if (u)
2698                                 {
2699                                         char curtime[256];
2700                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2701                                         params.push_back(curtime);
2702                                         params[0] = prefix;
2703                                         Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2704                                 }
2705                         }
2706                         else
2707                         {
2708                                 // not us, pass it on
2709                                 userrec* u = this->Instance->FindNick(params[1]);
2710                                 if (u)
2711                                         Utils->DoOneToOne(prefix,"TIME",params,params[0]);
2712                         }
2713                 }
2714                 else if (params.size() == 3)
2715                 {
2716                         // a response to a previous TIME
2717                         userrec* u = this->Instance->FindNick(params[1]);
2718                         if ((u) && (IS_LOCAL(u)))
2719                         {
2720                         time_t rawtime = atol(params[2].c_str());
2721                         struct tm * timeinfo;
2722                         timeinfo = localtime(&rawtime);
2723                                 char tms[26];
2724                                 snprintf(tms,26,"%s",asctime(timeinfo));
2725                                 tms[24] = 0;
2726                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2727                         }
2728                         else
2729                         {
2730                                 if (u)
2731                                         Utils->DoOneToOne(prefix,"TIME",params,u->server);
2732                         }
2733                 }
2734                 return true;
2735         }
2736
2737         bool LocalPing(const std::string &prefix, std::deque<std::string> &params)
2738         {
2739                 if (params.size() < 1)
2740                         return true;
2741
2742                 if (params.size() == 1)
2743                 {
2744                         std::string stufftobounce = params[0];
2745                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2746                         return true;
2747                 }
2748                 else
2749                 {
2750                         std::string forwardto = params[1];
2751                         if (forwardto == this->Instance->Config->ServerName)
2752                         {
2753                                 // this is a ping for us, send back PONG to the requesting server
2754                                 params[1] = params[0];
2755                                 params[0] = forwardto;
2756                                 Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
2757                         }
2758                         else
2759                         {
2760                                 // not for us, pass it on :)
2761                                 Utils->DoOneToOne(prefix,"PING",params,forwardto);
2762                         }
2763                         return true;
2764                 }
2765         }
2766
2767         bool RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
2768         {
2769                 if (params.size() < 1)
2770                         return true;
2771
2772                 chanrec* c = Instance->FindChan(params[0]);
2773
2774                 if (c)
2775                 {
2776                         irc::modestacker modestack(false);
2777                         CUList *ulist = c->GetUsers();
2778                         const char* y[127];
2779                         std::deque<std::string> stackresult;
2780                         std::string x;
2781
2782                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2783                         {
2784                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2785                                 if (modesequence.length())
2786                                 {
2787                                         Instance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2788                                         irc::spacesepstream sep(modesequence);
2789                                         std::string modeletters = sep.GetToken();
2790                                         Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2791
2792                                         while (!modeletters.empty())
2793                                         {
2794                                                 char mletter = *(modeletters.begin());
2795                                                 modestack.Push(mletter,sep.GetToken());
2796                                                 Instance->Log(DEBUG,"Push letter = '%c'",mletter);
2797                                                 modeletters.erase(modeletters.begin());
2798                                                 Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2799                                         }
2800                                 }
2801                         }
2802
2803                         while (modestack.GetStackedLine(stackresult))
2804                         {
2805                                 Instance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2806                                 stackresult.push_front(ConvToStr(c->age));
2807                                 stackresult.push_front(c->name);
2808                                 Utils->DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2809                                 stackresult.erase(stackresult.begin() + 1);
2810                                 Instance->Log(DEBUG,"Stacked items:");
2811                                 for (size_t z = 0; z < stackresult.size(); z++)
2812                                 {
2813                                         y[z] = stackresult[z].c_str();
2814                                         Instance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2815                                 }
2816                                 userrec* n = new userrec(Instance);
2817                                 n->SetFd(FD_MAGIC_NUMBER);
2818                                 Instance->SendMode(y, stackresult.size(), n);
2819                                 delete n;
2820                         }
2821                 }
2822                 return true;
2823         }
2824
2825         bool RemoteServer(const std::string &prefix, std::deque<std::string> &params)
2826         {
2827                 if (params.size() < 4)
2828                         return false;
2829
2830                 std::string servername = params[0];
2831                 std::string password = params[1];
2832                 // hopcount is not used for a remote server, we calculate this ourselves
2833                 std::string description = params[3];
2834                 TreeServer* ParentOfThis = Utils->FindServer(prefix);
2835
2836                 if (!ParentOfThis)
2837                 {
2838                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2839                         return false;
2840                 }
2841                 TreeServer* CheckDupe = Utils->FindServer(servername);
2842                 if (CheckDupe)
2843                 {
2844                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2845                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2846                         return false;
2847                 }
2848                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL);
2849                 ParentOfThis->AddChild(Node);
2850                 params[3] = ":" + params[3];
2851                 Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
2852                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2853                 return true;
2854         }
2855
2856         bool Outbound_Reply_Server(std::deque<std::string> &params)
2857         {
2858                 if (params.size() < 4)
2859                         return false;
2860
2861                 irc::string servername = params[0].c_str();
2862                 std::string sname = params[0];
2863                 std::string password = params[1];
2864                 int hops = atoi(params[2].c_str());
2865
2866                 if (hops)
2867                 {
2868                         this->WriteLine("ERROR :Server too far away for authentication");
2869                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2870                         return false;
2871                 }
2872                 std::string description = params[3];
2873                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2874                 {
2875                         if ((x->Name == servername) && (x->RecvPass == password))
2876                         {
2877                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2878                                 if (CheckDupe)
2879                                 {
2880                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2881                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2882                                         return false;
2883                                 }
2884                                 // Begin the sync here. this kickstarts the
2885                                 // other side, waiting in WAIT_AUTH_2 state,
2886                                 // into starting their burst, as it shows
2887                                 // that we're happy.
2888                                 this->LinkState = CONNECTED;
2889                                 // we should add the details of this server now
2890                                 // to the servers tree, as a child of the root
2891                                 // node.
2892                                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this);
2893                                 Utils->TreeRoot->AddChild(Node);
2894                                 params[3] = ":" + params[3];
2895                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
2896                                 this->bursting = true;
2897                                 this->DoBurst(Node);
2898                                 return true;
2899                         }
2900                 }
2901                 this->WriteLine("ERROR :Invalid credentials");
2902                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2903                 return false;
2904         }
2905
2906         bool Inbound_Server(std::deque<std::string> &params)
2907         {
2908                 if (params.size() < 4)
2909                         return false;
2910
2911                 irc::string servername = params[0].c_str();
2912                 std::string sname = params[0];
2913                 std::string password = params[1];
2914                 int hops = atoi(params[2].c_str());
2915
2916                 if (hops)
2917                 {
2918                         this->WriteLine("ERROR :Server too far away for authentication");
2919                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2920                         return false;
2921                 }
2922                 std::string description = params[3];
2923                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2924                 {
2925                         if ((x->Name == servername) && (x->RecvPass == password))
2926                         {
2927                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2928                                 if (CheckDupe)
2929                                 {
2930                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2931                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2932                                         return false;
2933                                 }
2934                                 /* If the config says this link is encrypted, but the remote side
2935                                  * hasnt bothered to send the AES command before SERVER, then we
2936                                  * boot them off as we MUST have this connection encrypted.
2937                                  */
2938                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2939                                 {
2940                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2941                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2942                                         return false;
2943                                 }
2944                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2945                                 this->InboundServerName = sname;
2946                                 this->InboundDescription = description;
2947                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2948                                 // along with the sendpass from this block.
2949                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2950                                 // move to the next state, we are now waiting for THEM.
2951                                 this->LinkState = WAIT_AUTH_2;
2952                                 return true;
2953                         }
2954                 }
2955                 this->WriteLine("ERROR :Invalid credentials");
2956                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2957                 return false;
2958         }
2959
2960         void Split(const std::string &line, std::deque<std::string> &n)
2961         {
2962                 n.clear();
2963                 irc::tokenstream tokens(line);
2964                 std::string param;
2965                 while ((param = tokens.GetToken()) != "")
2966                         n.push_back(param);
2967                 return;
2968         }
2969
2970         bool ProcessLine(std::string &line)
2971         {
2972                 std::deque<std::string> params;
2973                 irc::string command;
2974                 std::string prefix;
2975
2976                 if (line.empty())
2977                         return true;
2978
2979                 line = line.substr(0, line.find_first_of("\r\n"));
2980
2981                 Instance->Log(DEBUG,"IN: %s", line.c_str());
2982
2983                 this->Split(line.c_str(),params);
2984
2985                 if ((params[0][0] == ':') && (params.size() > 1))
2986                 {
2987                         prefix = params[0].substr(1);
2988                         params.pop_front();
2989                 }
2990
2991                 command = params[0].c_str();
2992                 params.pop_front();
2993
2994                 if ((!this->ctx_in) && (command == "AES"))
2995                 {
2996                         std::string sserv = params[0];
2997                         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2998                         {
2999                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
3000                                 {
3001                                         this->InitAES(x->EncryptionKey,sserv);
3002                                 }
3003                         }
3004
3005                         return true;
3006                 }
3007                 else if ((this->ctx_in) && (command == "AES"))
3008                 {
3009                         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());
3010                 }
3011
3012                 switch (this->LinkState)
3013                 {
3014                         TreeServer* Node;
3015
3016                         case WAIT_AUTH_1:
3017                                 // Waiting for SERVER command from remote server. Server initiating
3018                                 // the connection sends the first SERVER command, listening server
3019                                 // replies with theirs if its happy, then if the initiator is happy,
3020                                 // it starts to send its net sync, which starts the merge, otherwise
3021                                 // it sends an ERROR.
3022                                 if (command == "PASS")
3023                                 {
3024                                         /* Silently ignored */
3025                                 }
3026                                 else if (command == "SERVER")
3027                                 {
3028                                         return this->Inbound_Server(params);
3029                                 }
3030                                 else if (command == "ERROR")
3031                                 {
3032                                         return this->Error(params);
3033                                 }
3034                                 else if (command == "USER")
3035                                 {
3036                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
3037                                         return false;
3038                                 }
3039                                 else if (command == "CAPAB")
3040                                 {
3041                                         return this->Capab(params);
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
3049                                 {
3050                                         std::string error("ERROR :Invalid command in negotiation phase: ");
3051                                         error.append(command.c_str());
3052                                         this->WriteLine(error);
3053                                         return false;
3054                                 }
3055                         break;
3056                         case WAIT_AUTH_2:
3057                                 // Waiting for start of other side's netmerge to say they liked our
3058                                 // password.
3059                                 if (command == "SERVER")
3060                                 {
3061                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
3062                                         // silently ignore.
3063                                         return true;
3064                                 }
3065                                 else if ((command == "U") || (command == "S"))
3066                                 {
3067                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3068                                         return false;
3069                                 }
3070                                 else if (command == "BURST")
3071                                 {
3072                                         if (params.size())
3073                                         {
3074                                                 /* If a time stamp is provided, try and check syncronization */
3075                                                 time_t THEM = atoi(params[0].c_str());
3076                                                 long delta = THEM-time(NULL);
3077                                                 if ((delta < -600) || (delta > 600))
3078                                                 {
3079                                                         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));
3080                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
3081                                                         return false;
3082                                                 }
3083                                                 else if ((delta < -60) || (delta > 60))
3084                                                 {
3085                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
3086                                                 }
3087                                         }
3088                                         this->LinkState = CONNECTED;
3089                                         Node = new TreeServer(this->Utils,this->Instance,InboundServerName,InboundDescription,Utils->TreeRoot,this);
3090                                         Utils->TreeRoot->AddChild(Node);
3091                                         params.clear();
3092                                         params.push_back(InboundServerName);
3093                                         params.push_back("*");
3094                                         params.push_back("1");
3095                                         params.push_back(":"+InboundDescription);
3096                                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
3097                                         this->bursting = true;
3098                                         this->DoBurst(Node);
3099                                 }
3100                                 else if (command == "ERROR")
3101                                 {
3102                                         return this->Error(params);
3103                                 }
3104                                 else if (command == "CAPAB")
3105                                 {
3106                                         return this->Capab(params);
3107                                 }
3108
3109                         break;
3110                         case LISTENER:
3111                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
3112                                 return false;
3113                         break;
3114                         case CONNECTING:
3115                                 if (command == "SERVER")
3116                                 {
3117                                         // another server we connected to, which was in WAIT_AUTH_1 state,
3118                                         // has just sent us their credentials. If we get this far, theyre
3119                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
3120                                         // if we're happy with this, we should send our netburst which
3121                                         // kickstarts the merge.
3122                                         return this->Outbound_Reply_Server(params);
3123                                 }
3124                                 else if (command == "ERROR")
3125                                 {
3126                                         return this->Error(params);
3127                                 }
3128                         break;
3129                         case CONNECTED:
3130                                 // This is the 'authenticated' state, when all passwords
3131                                 // have been exchanged and anything past this point is taken
3132                                 // as gospel.
3133
3134                                 if (prefix != "")
3135                                 {
3136                                         std::string direction = prefix;
3137                                         userrec* t = this->Instance->FindNick(prefix);
3138                                         if (t)
3139                                         {
3140                                                 direction = t->server;
3141                                         }
3142                                         TreeServer* route_back_again = Utils->BestRouteTo(direction);
3143                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3144                                         {
3145                                                 if (route_back_again)
3146                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3147                                                 return true;
3148                                         }
3149
3150                                         /* Fix by brain:
3151                                          * When there is activity on the socket, reset the ping counter so
3152                                          * that we're not wasting bandwidth pinging an active server.
3153                                          */
3154                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3155                                         route_back_again->SetPingFlag();
3156                                 }
3157
3158                                 if (command == "SVSMODE")
3159                                 {
3160                                         /* Services expects us to implement
3161                                          * SVSMODE. In inspircd its the same as
3162                                          * MODE anyway.
3163                                          */
3164                                         command = "MODE";
3165                                 }
3166                                 std::string target = "";
3167                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3168                                  * working with std::string here.
3169                                  */
3170                                 if ((command == "NICK") && (params.size() > 1))
3171                                 {
3172                                         return this->IntroduceClient(prefix,params);
3173                                 }
3174                                 else if (command == "FJOIN")
3175                                 {
3176                                         return this->ForceJoin(prefix,params);
3177                                 }
3178                                 else if (command == "STATS")
3179                                 {
3180                                         return this->Stats(prefix, params);
3181                                 }
3182                                 else if (command == "MOTD")
3183                                 {
3184                                         return this->Motd(prefix, params);
3185                                 }
3186                                 else if (command == "ADMIN")
3187                                 {
3188                                         return this->Admin(prefix, params);
3189                                 }
3190                                 else if (command == "SERVER")
3191                                 {
3192                                         return this->RemoteServer(prefix,params);
3193                                 }
3194                                 else if (command == "ERROR")
3195                                 {
3196                                         return this->Error(params);
3197                                 }
3198                                 else if (command == "OPERTYPE")
3199                                 {
3200                                         return this->OperType(prefix,params);
3201                                 }
3202                                 else if (command == "FMODE")
3203                                 {
3204                                         return this->ForceMode(prefix,params);
3205                                 }
3206                                 else if (command == "KILL")
3207                                 {
3208                                         return this->RemoteKill(prefix,params);
3209                                 }
3210                                 else if (command == "FTOPIC")
3211                                 {
3212                                         return this->ForceTopic(prefix,params);
3213                                 }
3214                                 else if (command == "REHASH")
3215                                 {
3216                                         return this->RemoteRehash(prefix,params);
3217                                 }
3218                                 else if (command == "METADATA")
3219                                 {
3220                                         return this->MetaData(prefix,params);
3221                                 }
3222                                 else if (command == "REMSTATUS")
3223                                 {
3224                                         return this->RemoveStatus(prefix,params);
3225                                 }
3226                                 else if (command == "PING")
3227                                 {
3228                                         /*
3229                                          * We just got a ping from a server that's bursting.
3230                                          * This can't be right, so set them to not bursting, and
3231                                          * apply their lines.
3232                                          */
3233                                         if (this->bursting)
3234                                         {
3235                                                 this->bursting = false;
3236                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3237                                         }
3238                                         if (prefix == "")
3239                                         {
3240                                                 prefix = this->GetName();
3241                                         }
3242                                         return this->LocalPing(prefix,params);
3243                                 }
3244                                 else if (command == "PONG")
3245                                 {
3246                                         /*
3247                                          * We just got a pong from a server that's bursting.
3248                                          * This can't be right, so set them to not bursting, and
3249                                          * apply their lines.
3250                                          */
3251                                         if (this->bursting)
3252                                         {
3253                                                 this->bursting = false;
3254                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3255                                         }
3256                                         if (prefix == "")
3257                                         {
3258                                                 prefix = this->GetName();
3259                                         }
3260                                         return this->LocalPong(prefix,params);
3261                                 }
3262                                 else if (command == "VERSION")
3263                                 {
3264                                         return this->ServerVersion(prefix,params);
3265                                 }
3266                                 else if (command == "FHOST")
3267                                 {
3268                                         return this->ChangeHost(prefix,params);
3269                                 }
3270                                 else if (command == "FNAME")
3271                                 {
3272                                         return this->ChangeName(prefix,params);
3273                                 }
3274                                 else if (command == "ADDLINE")
3275                                 {
3276                                         return this->AddLine(prefix,params);
3277                                 }
3278                                 else if (command == "SVSNICK")
3279                                 {
3280                                         if (prefix == "")
3281                                         {
3282                                                 prefix = this->GetName();
3283                                         }
3284                                         return this->ForceNick(prefix,params);
3285                                 }
3286                                 else if (command == "IDLE")
3287                                 {
3288                                         return this->Whois(prefix,params);
3289                                 }
3290                                 else if (command == "PUSH")
3291                                 {
3292                                         return this->Push(prefix,params);
3293                                 }
3294                                 else if (command == "TIME")
3295                                 {
3296                                         return this->Time(prefix,params);
3297                                 }
3298                                 else if ((command == "KICK") && (Utils->IsServer(prefix)))
3299                                 {
3300                                         std::string sourceserv = this->myhost;
3301                                         if (params.size() == 3)
3302                                         {
3303                                                 userrec* user = this->Instance->FindNick(params[1]);
3304                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3305                                                 if (user && chan)
3306                                                 {
3307                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3308                                                                 /* Yikes, the channels gone! */
3309                                                                 delete chan;
3310                                                 }
3311                                         }
3312                                         if (this->InboundServerName != "")
3313                                         {
3314                                                 sourceserv = this->InboundServerName;
3315                                         }
3316                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3317                                 }
3318                                 else if (command == "SVSJOIN")
3319                                 {
3320                                         if (prefix == "")
3321                                         {
3322                                                 prefix = this->GetName();
3323                                         }
3324                                         return this->ServiceJoin(prefix,params);
3325                                 }
3326                                 else if (command == "SQUIT")
3327                                 {
3328                                         if (params.size() == 2)
3329                                         {
3330                                                 this->Squit(Utils->FindServer(params[0]),params[1]);
3331                                         }
3332                                         return true;
3333                                 }
3334                                 else if (command == "ENDBURST")
3335                                 {
3336                                         this->bursting = false;
3337                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3338                                         std::string sourceserv = this->myhost;
3339                                         if (this->InboundServerName != "")
3340                                         {
3341                                                 sourceserv = this->InboundServerName;
3342                                         }
3343                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3344                                         return true;
3345                                 }
3346                                 else
3347                                 {
3348                                         // not a special inter-server command.
3349                                         // Emulate the actual user doing the command,
3350                                         // this saves us having a huge ugly parser.
3351                                         userrec* who = this->Instance->FindNick(prefix);
3352                                         std::string sourceserv = this->myhost;
3353                                         if (this->InboundServerName != "")
3354                                         {
3355                                                 sourceserv = this->InboundServerName;
3356                                         }
3357                                         if (who)
3358                                         {
3359                                                 if ((command == "NICK") && (params.size() > 0))
3360                                                 {
3361                                                         /* On nick messages, check that the nick doesnt
3362                                                          * already exist here. If it does, kill their copy,
3363                                                          * and our copy.
3364                                                          */
3365                                                         userrec* x = this->Instance->FindNick(params[0]);
3366                                                         if ((x) && (x != who))
3367                                                         {
3368                                                                 std::deque<std::string> p;
3369                                                                 p.push_back(params[0]);
3370                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3371                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3372                                                                 p.clear();
3373                                                                 p.push_back(prefix);
3374                                                                 p.push_back("Nickname collision");
3375                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3376                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3377                                                                 userrec* y = this->Instance->FindNick(prefix);
3378                                                                 if (y)
3379                                                                 {
3380                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3381                                                                 }
3382                                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3383                                                         }
3384                                                 }
3385                                                 // its a user
3386                                                 target = who->server;
3387                                                 const char* strparams[127];
3388                                                 for (unsigned int q = 0; q < params.size(); q++)
3389                                                 {
3390                                                         strparams[q] = params[q].c_str();
3391                                                 }
3392                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3393                                                 {
3394                                                         case CMD_INVALID:
3395                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3396                                                                 return false;
3397                                                         break;
3398                                                         case CMD_FAILURE:
3399                                                                 return true;
3400                                                         break;
3401                                                         default:
3402                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3403                                                         break;
3404                                                 }
3405                                         }
3406                                         else
3407                                         {
3408                                                 // its not a user. Its either a server, or somethings screwed up.
3409                                                 if (Utils->IsServer(prefix))
3410                                                 {
3411                                                         target = this->Instance->Config->ServerName;
3412                                                 }
3413                                                 else
3414                                                 {
3415                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3416                                                         return true;
3417                                                 }
3418                                         }
3419                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3420
3421                                 }
3422                                 return true;
3423                         break;
3424                 }
3425                 return true;
3426         }
3427
3428         virtual std::string GetName()
3429         {
3430                 std::string sourceserv = this->myhost;
3431                 if (this->InboundServerName != "")
3432                 {
3433                         sourceserv = this->InboundServerName;
3434                 }
3435                 return sourceserv;
3436         }
3437
3438         virtual void OnTimeout()
3439         {
3440                 if (this->LinkState == CONNECTING)
3441                 {
3442                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3443                         Link* MyLink = Utils->FindLink(myhost);
3444                         if (MyLink)
3445                                 Utils->DoFailOver(MyLink);
3446                 }
3447         }
3448
3449         virtual void OnClose()
3450         {
3451                 // Connection closed.
3452                 // If the connection is fully up (state CONNECTED)
3453                 // then propogate a netsplit to all peers.
3454                 std::string quitserver = this->myhost;
3455                 if (this->InboundServerName != "")
3456                 {
3457                         quitserver = this->InboundServerName;
3458                 }
3459                 TreeServer* s = Utils->FindServer(quitserver);
3460                 if (s)
3461                 {
3462                         Squit(s,"Remote host closed the connection");
3463                 }
3464                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3465         }
3466
3467         virtual int OnIncomingConnection(int newsock, char* ip)
3468         {
3469                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3470                  * or discovering if this port is the server port, we don't allow connections from any
3471                  * IPs for which we don't have a link block.
3472                  */
3473                 bool found = false;
3474
3475                 found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
3476                 if (!found)
3477                 {
3478                         for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
3479                                 if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
3480                                         found = true;
3481
3482                         if (!found)
3483                         {
3484                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3485                                 close(newsock);
3486                                 return false;
3487                         }
3488                 }
3489                 TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip);
3490                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3491                 return true;
3492         }
3493 };
3494
3495 /** This class is used to resolve server hostnames during /connect and autoconnect.
3496  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3497  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3498  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3499  * will have an IP address which we can then use to continue our connection.
3500  */
3501 class ServernameResolver : public Resolver
3502 {
3503  private:
3504         /** A copy of the Link tag info for what we're connecting to.
3505          * We take a copy, rather than using a pointer, just in case the
3506          * admin takes the tag away and rehashes while the domain is resolving.
3507          */
3508         Link MyLink;
3509         SpanningTreeUtilities* Utils;
3510  public:
3511         ServernameResolver(SpanningTreeUtilities* Util, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x), Utils(Util)
3512         {
3513                 /* Nothing in here, folks */
3514         }
3515
3516         void OnLookupComplete(const std::string &result)
3517         {
3518                 /* Initiate the connection, now that we have an IP to use.
3519                  * Passing a hostname directly to InspSocket causes it to
3520                  * just bail and set its FD to -1.
3521                  */
3522                 TreeServer* CheckDupe = Utils->FindServer(MyLink.Name.c_str());
3523                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3524                 {
3525                         TreeSocket* newsocket = new TreeSocket(this->Utils, ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3526                         if (newsocket->GetFd() > -1)
3527                         {
3528                                 /* We're all OK */
3529                         }
3530                         else
3531                         {
3532                                 /* Something barfed, show the opers */
3533                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3534                                 delete newsocket;
3535                                 Utils->DoFailOver(&MyLink);
3536                         }
3537                 }
3538         }
3539
3540         void OnError(ResolverError e, const std::string &errormessage)
3541         {
3542                 /* Ooops! */
3543                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3544                 Utils->DoFailOver(&MyLink);
3545         }
3546 };
3547
3548 /** Handle resolving of server IPs for the cache
3549  */
3550 class SecurityIPResolver : public Resolver
3551 {
3552  private:
3553         Link MyLink;
3554         SpanningTreeUtilities* Utils;
3555  public:
3556         SecurityIPResolver(SpanningTreeUtilities* U, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x), Utils(U)
3557         {
3558         }
3559
3560         void OnLookupComplete(const std::string &result)
3561         {
3562                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3563                 Utils->ValidIPs.push_back(result);
3564         }
3565
3566         void OnError(ResolverError e, const std::string &errormessage)
3567         {
3568                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3569         }
3570 };
3571
3572 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
3573 {
3574         Bindings.clear();
3575         this->ReadConfiguration(true);
3576         this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3577 }
3578
3579 SpanningTreeUtilities::~SpanningTreeUtilities()
3580 {
3581         for (unsigned int i = 0; i < Bindings.size(); i++)
3582         {
3583                 ServerInstance->Log(DEBUG,"Freeing binding %d of %d",i, Bindings.size());
3584                 ServerInstance->SE->DelFd(Bindings[i]);
3585                 Bindings[i]->Close();
3586                 DELETE(Bindings[i]);
3587         }
3588         ServerInstance->Log(DEBUG,"Freeing connected servers...");
3589         while (TreeRoot->ChildCount())
3590         {
3591                 TreeServer* child_server = TreeRoot->GetChild(0);
3592                 ServerInstance->Log(DEBUG,"Freeing connected server %s", child_server->GetName().c_str());
3593                 if (child_server)
3594                 {
3595                         TreeSocket* sock = child_server->GetSocket();
3596                         ServerInstance->SE->DelFd(sock);
3597                         sock->Close();
3598                         DELETE(sock);
3599                 }
3600         }
3601         delete TreeRoot;
3602 }
3603
3604 void SpanningTreeUtilities::AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3605 {
3606         for (unsigned int c = 0; c < list.size(); c++)
3607         {
3608                 if (list[c] == server)
3609                 {
3610                         return;
3611                 }
3612         }
3613         list.push_back(server);
3614 }
3615
3616 /** returns a list of DIRECT servernames for a specific channel */
3617 void SpanningTreeUtilities::GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3618 {
3619         CUList *ulist = c->GetUsers();
3620         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3621         {
3622                 if (i->second->GetFd() < 0)
3623                 {
3624                         TreeServer* best = this->BestRouteTo(i->second->server);
3625                         if (best)
3626                                 AddThisServer(best,list);
3627                 }
3628         }
3629         return;
3630 }
3631
3632 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params)
3633 {
3634         TreeServer* omitroute = this->BestRouteTo(omit);
3635         if ((command == "NOTICE") || (command == "PRIVMSG"))
3636         {
3637                 if (params.size() >= 2)
3638                 {
3639                         /* Prefixes */
3640                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3641                         {
3642                                 params[0] = params[0].substr(1, params[0].length()-1);
3643                         }
3644                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3645                         {
3646                                 // special routing for private messages/notices
3647                                 userrec* d = ServerInstance->FindNick(params[0]);
3648                                 if (d)
3649                                 {
3650                                         std::deque<std::string> par;
3651                                         par.push_back(params[0]);
3652                                         par.push_back(":"+params[1]);
3653                                         this->DoOneToOne(prefix,command.c_str(),par,d->server);
3654                                         return true;
3655                                 }
3656                         }
3657                         else if (*(params[0].c_str()) == '$')
3658                         {
3659                                 std::deque<std::string> par;
3660                                 par.push_back(params[0]);
3661                                 par.push_back(":"+params[1]);
3662                                 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3663                                 return true;
3664                         }
3665                         else
3666                         {
3667                                 chanrec* c = ServerInstance->FindChan(params[0]);
3668                                 if (c)
3669                                 {
3670                                         std::deque<TreeServer*> list;
3671                                         GetListOfServersForChannel(c,list);
3672                                         unsigned int lsize = list.size();
3673                                         for (unsigned int i = 0; i < lsize; i++)
3674                                         {
3675                                                 TreeSocket* Sock = list[i]->GetSocket();
3676                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3677                                                 {
3678                                                         Sock->WriteLine(data);
3679                                                 }
3680                                         }
3681                                         return true;
3682                                 }
3683                         }
3684                 }
3685         }
3686         unsigned int items =this->TreeRoot->ChildCount();
3687         for (unsigned int x = 0; x < items; x++)
3688         {
3689                 TreeServer* Route = this->TreeRoot->GetChild(x);
3690                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3691                 {
3692                         TreeSocket* Sock = Route->GetSocket();
3693                         if (Sock)
3694                                 Sock->WriteLine(data);
3695                 }
3696         }
3697         return true;
3698 }
3699
3700 bool SpanningTreeUtilities::DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit)
3701 {
3702         TreeServer* omitroute = this->BestRouteTo(omit);
3703         std::string FullLine = ":" + prefix + " " + command;
3704         unsigned int words = params.size();
3705         for (unsigned int x = 0; x < words; x++)
3706         {
3707                 FullLine = FullLine + " " + params[x];
3708         }
3709         unsigned int items = this->TreeRoot->ChildCount();
3710         for (unsigned int x = 0; x < items; x++)
3711         {
3712                 TreeServer* Route = this->TreeRoot->GetChild(x);
3713                 // Send the line IF:
3714                 // The route has a socket (its a direct connection)
3715                 // The route isnt the one to be omitted
3716                 // The route isnt the path to the one to be omitted
3717                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
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 std::string &prefix, const std::string &command, std::deque<std::string> &params)
3728 {
3729         std::string FullLine = ":" + prefix + " " + command;
3730         unsigned int words = params.size();
3731         for (unsigned int x = 0; x < words; x++)
3732         {
3733                 FullLine = FullLine + " " + params[x];
3734         }
3735         unsigned int items = this->TreeRoot->ChildCount();
3736         for (unsigned int x = 0; x < items; x++)
3737         {
3738                 TreeServer* Route = this->TreeRoot->GetChild(x);
3739                 if (Route && Route->GetSocket())
3740                 {
3741                         TreeSocket* Sock = Route->GetSocket();
3742                         if (Sock)
3743                                 Sock->WriteLine(FullLine);
3744                 }
3745         }
3746         return true;
3747 }
3748
3749 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3750 {
3751         std::string spfx = prefix;
3752         std::string scmd = command;
3753         return this->DoOneToMany(spfx, scmd, params);
3754 }
3755
3756 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3757 {
3758         std::string spfx = prefix;
3759         std::string scmd = command;
3760         return this->DoOneToAllButSender(spfx, scmd, params, omit);
3761 }
3762
3763 bool SpanningTreeUtilities::DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target)
3764 {
3765         TreeServer* Route = this->BestRouteTo(target);
3766         if (Route)
3767         {
3768                 std::string FullLine = ":" + prefix + " " + command;
3769                 unsigned int words = params.size();
3770                 for (unsigned int x = 0; x < words; x++)
3771                 {
3772                         FullLine = FullLine + " " + params[x];
3773                 }
3774                 if (Route && Route->GetSocket())
3775                 {
3776                         TreeSocket* Sock = Route->GetSocket();
3777                         if (Sock)
3778                                 Sock->WriteLine(FullLine);
3779                 }
3780                 return true;
3781         }
3782         else
3783         {
3784                 return false;
3785         }
3786 }
3787
3788 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
3789 {
3790         ConfigReader* Conf = new ConfigReader(ServerInstance);
3791         if (rebind)
3792         {
3793                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3794                 {
3795                         std::string Type = Conf->ReadValue("bind","type",j);
3796                         std::string IP = Conf->ReadValue("bind","address",j);
3797                         int Port = Conf->ReadInteger("bind","port",j,true);
3798                         if (Type == "servers")
3799                         {
3800                                 ServerInstance->Log(DEBUG,"m_spanningtree: Binding server port %s:%d", IP.c_str(), Port);
3801                                 if (IP == "*")
3802                                 {
3803                                         IP = "";
3804                                 }
3805                                 TreeSocket* listener = new TreeSocket(this, ServerInstance, IP.c_str(),Port,true,10);
3806                                 if (listener->GetState() == I_LISTENING)
3807                                 {
3808                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), Port);
3809                                         Bindings.push_back(listener);
3810                                 }
3811                                 else
3812                                 {
3813                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3814                                         listener->Close();
3815                                         DELETE(listener);
3816                                 }
3817                                 ServerInstance->Log(DEBUG,"Done with this binding");
3818                         }
3819                 }
3820         }
3821         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3822         HideULines = Conf->ReadFlag("options","hideulines",0);
3823         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
3824         LinkBlocks.clear();
3825         ValidIPs.clear();
3826         for (int j =0; j < Conf->Enumerate("link"); j++)
3827         {
3828                 Link L;
3829                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3830                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3831                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3832                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3833                 L.Port = Conf->ReadInteger("link","port",j,true);
3834                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3835                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3836                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3837                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3838                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3839                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3840                 /* Bugfix by brain, do not allow people to enter bad configurations */
3841                 if (L.Name != ServerInstance->Config->ServerName)
3842                 {
3843                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3844                         {
3845                                 ValidIPs.push_back(L.IPAddr);
3846
3847                                 if (Allow.length())
3848                                         ValidIPs.push_back(Allow);
3849
3850                                 /* Needs resolving */
3851                                 insp_inaddr binip;
3852                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3853                                 {
3854                                         try
3855                                         {
3856                                                 SecurityIPResolver* sr = new SecurityIPResolver(this, ServerInstance, L.IPAddr, L);
3857                                                 ServerInstance->AddResolver(sr);
3858                                         }
3859                                         catch (ModuleException& e)
3860                                         {
3861                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3862                                         }
3863                                 }
3864
3865                                 LinkBlocks.push_back(L);
3866                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3867                         }
3868                         else
3869                         {
3870                                 if (L.IPAddr == "")
3871                                 {
3872                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3873                                 }
3874                                 else if (L.RecvPass == "")
3875                                 {
3876                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3877                                 }
3878                                 else if (L.SendPass == "")
3879                                 {
3880                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3881                                 }
3882                                 else if (L.Name == "")
3883                                 {
3884                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3885                                 }
3886                                 else if (!L.Port)
3887                                 {
3888                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3889                                 }
3890                         }
3891                 }
3892                 else
3893                 {
3894                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3895                 }
3896         }
3897         DELETE(Conf);
3898 }
3899
3900
3901
3902 class ModuleSpanningTree : public Module
3903 {
3904         int line;
3905         int NumServers;
3906         unsigned int max_local;
3907         unsigned int max_global;
3908         cmd_rconnect* command_rconnect;
3909         SpanningTreeUtilities* Utils;
3910
3911  public:
3912
3913         ModuleSpanningTree(InspIRCd* Me)
3914                 : Module::Module(Me), max_local(0), max_global(0)
3915         {
3916                 Utils = new SpanningTreeUtilities(Me, this);
3917
3918                 command_rconnect = new cmd_rconnect(ServerInstance, this, Utils);
3919                 ServerInstance->AddCommand(command_rconnect);
3920         }
3921
3922         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3923         {
3924                 std::string Parent = Utils->TreeRoot->GetName();
3925                 if (Current->GetParent())
3926                 {
3927                         Parent = Current->GetParent()->GetName();
3928                 }
3929                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3930                 {
3931                         if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3932                         {
3933                                 if (*user->oper)
3934                                 {
3935                                          ShowLinks(Current->GetChild(q),user,hops+1);
3936                                 }
3937                         }
3938                         else
3939                         {
3940                                 ShowLinks(Current->GetChild(q),user,hops+1);
3941                         }
3942                 }
3943                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3944                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3945                         return;
3946                 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());
3947         }
3948
3949         int CountLocalServs()
3950         {
3951                 return Utils->TreeRoot->ChildCount();
3952         }
3953
3954         int CountServs()
3955         {
3956                 return Utils->serverlist.size();
3957         }
3958
3959         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3960         {
3961                 ShowLinks(Utils->TreeRoot,user,0);
3962                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3963                 return;
3964         }
3965
3966         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3967         {
3968                 unsigned int n_users = ServerInstance->UserCount();
3969
3970                 /* Only update these when someone wants to see them, more efficient */
3971                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3972                         max_local = ServerInstance->LocalUserCount();
3973                 if (n_users > max_global)
3974                         max_global = n_users;
3975
3976                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3977                 if (ServerInstance->OperCount())
3978                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3979                 if (ServerInstance->UnregisteredUserCount())
3980                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3981                 if (ServerInstance->ChannelCount())
3982                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3983                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3984                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3985                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3986                 return;
3987         }
3988
3989         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3990
3991         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3992         {
3993                 if (line < 128)
3994                 {
3995                         for (int t = 0; t < depth; t++)
3996                         {
3997                                 matrix[line][t] = ' ';
3998                         }
3999
4000                         // For Aligning, we need to work out exactly how deep this thing is, and produce
4001                         // a 'Spacer' String to compensate.
4002                         char spacer[40];
4003
4004                         memset(spacer,' ',40);
4005                         if ((40 - Current->GetName().length() - depth) > 1) {
4006                                 spacer[40 - Current->GetName().length() - depth] = '\0';
4007                         }
4008                         else
4009                         {
4010                                 spacer[5] = '\0';
4011                         }
4012
4013                         float percent;
4014                         char text[80];
4015                         if (ServerInstance->clientlist.size() == 0) {
4016                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
4017                                 percent = 0;
4018                         }
4019                         else
4020                         {
4021                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
4022                         }
4023                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
4024                         totusers += Current->GetUserCount();
4025                         totservers++;
4026                         strlcpy(&matrix[line][depth],text,80);
4027                         line++;
4028                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
4029                         {
4030                                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
4031                                 {
4032                                         if (*user->oper)
4033                                         {
4034                                                 ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4035                                         }
4036                                 }
4037                                 else
4038                                 {
4039                                         ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4040                                 }
4041                         }
4042                 }
4043         }
4044
4045         int HandleMotd(const char** parameters, int pcnt, userrec* user)
4046         {
4047                 if (pcnt > 0)
4048                 {
4049                         /* Remote MOTD, the server is within the 1st parameter */
4050                         std::deque<std::string> params;
4051                         params.push_back(parameters[0]);
4052
4053                         /* Send it out remotely, generate no reply yet */
4054                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4055                         if (s)
4056                         {
4057                                 Utils->DoOneToOne(user->nick, "MOTD", params, s->GetName());
4058                         }
4059                         else
4060                         {
4061                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4062                         }
4063                         return 1;
4064                 }
4065                 return 0;
4066         }
4067
4068         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
4069         {
4070                 if (pcnt > 0)
4071                 {
4072                         /* Remote ADMIN, the server is within the 1st parameter */
4073                         std::deque<std::string> params;
4074                         params.push_back(parameters[0]);
4075
4076                         /* Send it out remotely, generate no reply yet */
4077                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4078                         if (s)
4079                         {
4080                                 Utils->DoOneToOne(user->nick, "ADMIN", params, s->GetName());
4081                         }
4082                         else
4083                         {
4084                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4085                         }
4086                         return 1;
4087                 }
4088                 return 0;
4089         }
4090
4091         int HandleStats(const char** parameters, int pcnt, userrec* user)
4092         {
4093                 if (pcnt > 1)
4094                 {
4095                         /* Remote STATS, the server is within the 2nd parameter */
4096                         std::deque<std::string> params;
4097                         params.push_back(parameters[0]);
4098                         params.push_back(parameters[1]);
4099                         /* Send it out remotely, generate no reply yet */
4100                         TreeServer* s = Utils->FindServerMask(parameters[1]);
4101                         if (s)
4102                         {
4103                                 params[1] = s->GetName();
4104                                 Utils->DoOneToOne(user->nick, "STATS", params, s->GetName());
4105                         }
4106                         else
4107                         {
4108                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4109                         }
4110                         return 1;
4111                 }
4112                 return 0;
4113         }
4114
4115         // Ok, prepare to be confused.
4116         // After much mulling over how to approach this, it struck me that
4117         // the 'usual' way of doing a /MAP isnt the best way. Instead of
4118         // keeping track of a ton of ascii characters, and line by line
4119         // under recursion working out where to place them using multiplications
4120         // and divisons, we instead render the map onto a backplane of characters
4121         // (a character matrix), then draw the branches as a series of "L" shapes
4122         // from the nodes. This is not only friendlier on CPU it uses less stack.
4123
4124         void HandleMap(const char** parameters, int pcnt, userrec* user)
4125         {
4126                 // This array represents a virtual screen which we will
4127                 // "scratch" draw to, as the console device of an irc
4128                 // client does not provide for a proper terminal.
4129                 float totusers = 0;
4130                 float totservers = 0;
4131                 char matrix[128][80];
4132                 for (unsigned int t = 0; t < 128; t++)
4133                 {
4134                         matrix[t][0] = '\0';
4135                 }
4136                 line = 0;
4137                 // The only recursive bit is called here.
4138                 ShowMap(Utils->TreeRoot,user,0,matrix,totusers,totservers);
4139                 // Process each line one by one. The algorithm has a limit of
4140                 // 128 servers (which is far more than a spanning tree should have
4141                 // anyway, so we're ok). This limit can be raised simply by making
4142                 // the character matrix deeper, 128 rows taking 10k of memory.
4143                 for (int l = 1; l < line; l++)
4144                 {
4145                         // scan across the line looking for the start of the
4146                         // servername (the recursive part of the algorithm has placed
4147                         // the servers at indented positions depending on what they
4148                         // are related to)
4149                         int first_nonspace = 0;
4150                         while (matrix[l][first_nonspace] == ' ')
4151                         {
4152                                 first_nonspace++;
4153                         }
4154                         first_nonspace--;
4155                         // Draw the `- (corner) section: this may be overwritten by
4156                         // another L shape passing along the same vertical pane, becoming
4157                         // a |- (branch) section instead.
4158                         matrix[l][first_nonspace] = '-';
4159                         matrix[l][first_nonspace-1] = '`';
4160                         int l2 = l - 1;
4161                         // Draw upwards until we hit the parent server, causing possibly
4162                         // other corners (`-) to become branches (|-)
4163                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
4164                         {
4165                                 matrix[l2][first_nonspace-1] = '|';
4166                                 l2--;
4167                         }
4168                 }
4169                 // dump the whole lot to the user. This is the easy bit, honest.
4170                 for (int t = 0; t < line; t++)
4171                 {
4172                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4173                 }
4174                 float avg_users = totusers / totservers;
4175                 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);
4176         user->WriteServ("007 %s :End of /MAP",user->nick);
4177                 return;
4178         }
4179
4180         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4181         {
4182                 TreeServer* s = Utils->FindServerMask(parameters[0]);
4183                 if (s)
4184                 {
4185                         if (s == Utils->TreeRoot)
4186                         {
4187                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4188                                 return 1;
4189                         }
4190                         TreeSocket* sock = s->GetSocket();
4191                         if (sock)
4192                         {
4193                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4194                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4195                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
4196                                 ServerInstance->SE->DelFd(sock);
4197                                 sock->Close();
4198                                 delete sock;
4199                         }
4200                         else
4201                         {
4202                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
4203                         }
4204                 }
4205                 else
4206                 {
4207                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4208                 }
4209                 return 1;
4210         }
4211
4212         int HandleTime(const char** parameters, int pcnt, userrec* user)
4213         {
4214                 if ((IS_LOCAL(user)) && (pcnt))
4215                 {
4216                         TreeServer* found = Utils->FindServerMask(parameters[0]);
4217                         if (found)
4218                         {
4219                                 // we dont' override for local server
4220                                 if (found == Utils->TreeRoot)
4221                                         return 0;
4222
4223                                 std::deque<std::string> params;
4224                                 params.push_back(found->GetName());
4225                                 params.push_back(user->nick);
4226                                 Utils->DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4227                         }
4228                         else
4229                         {
4230                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4231                         }
4232                 }
4233                 return 1;
4234         }
4235
4236         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4237         {
4238                 if ((IS_LOCAL(user)) && (pcnt > 1))
4239                 {
4240                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4241                         if ((remote) && (remote->GetFd() < 0))
4242                         {
4243                                 std::deque<std::string> params;
4244                                 params.push_back(parameters[1]);
4245                                 Utils->DoOneToOne(user->nick,"IDLE",params,remote->server);
4246                                 return 1;
4247                         }
4248                         else if (!remote)
4249                         {
4250                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4251                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4252                                 return 1;
4253                         }
4254                 }
4255                 return 0;
4256         }
4257
4258         void DoPingChecks(time_t curtime)
4259         {
4260                 for (unsigned int j = 0; j < Utils->TreeRoot->ChildCount(); j++)
4261                 {
4262                         TreeServer* serv = Utils->TreeRoot->GetChild(j);
4263                         TreeSocket* sock = serv->GetSocket();
4264                         if (sock)
4265                         {
4266                                 if (curtime >= serv->NextPingTime())
4267                                 {
4268                                         if (serv->AnsweredLastPing())
4269                                         {
4270                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4271                                                 serv->SetNextPingTime(curtime + 60);
4272                                         }
4273                                         else
4274                                         {
4275                                                 // they didnt answer, boot them
4276                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4277                                                 sock->Squit(serv,"Ping timeout");
4278                                                 ServerInstance->SE->DelFd(sock);
4279                                                 sock->Close();
4280                                                 delete sock;
4281                                                 return;
4282                                         }
4283                                 }
4284                         }
4285                 }
4286         }
4287
4288         void ConnectServer(Link* x)
4289         {
4290                 insp_inaddr binip;
4291
4292                 /* Do we already have an IP? If so, no need to resolve it. */
4293                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4294                 {
4295                         TreeSocket* newsocket = new TreeSocket(Utils, ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4296                         if (newsocket->GetFd() > -1)
4297                         {
4298                                 /* Handled automatically on success */
4299                         }
4300                         else
4301                         {
4302                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4303                                 delete newsocket;
4304                                 Utils->DoFailOver(x);
4305                         }
4306                 }
4307                 else
4308                 {
4309                         try
4310                         {
4311                                 ServernameResolver* snr = new ServernameResolver(Utils, ServerInstance,x->IPAddr, *x);
4312                                 ServerInstance->AddResolver(snr);
4313                         }
4314                         catch (ModuleException& e)
4315                         {
4316                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4317                                 Utils->DoFailOver(x);
4318                         }
4319                 }
4320         }
4321
4322         void AutoConnectServers(time_t curtime)
4323         {
4324                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4325                 {
4326                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4327                         {
4328                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4329                                 x->NextConnectTime = curtime + x->AutoConnect;
4330                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4331                                 if (x->FailOver.length())
4332                                 {
4333                                         TreeServer* CheckFailOver = Utils->FindServer(x->FailOver.c_str());
4334                                         if (CheckFailOver)
4335                                         {
4336                                                 /* The failover for this server is currently a member of the network.
4337                                                  * The failover probably succeeded, where the main link did not.
4338                                                  * Don't try the main link until the failover is gone again.
4339                                                  */
4340                                                 continue;
4341                                         }
4342                                 }
4343                                 if (!CheckDupe)
4344                                 {
4345                                         // an autoconnected server is not connected. Check if its time to connect it
4346                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4347                                         this->ConnectServer(&(*x));
4348                                 }
4349                         }
4350                 }
4351         }
4352
4353         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4354         {
4355                 // we've already checked if pcnt > 0, so this is safe
4356                 TreeServer* found = Utils->FindServerMask(parameters[0]);
4357                 if (found)
4358                 {
4359                         std::string Version = found->GetVersion();
4360                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4361                         if (found == Utils->TreeRoot)
4362                         {
4363                                 std::stringstream out(ServerInstance->Config->data005);
4364                                 std::string token = "";
4365                                 std::string line5 = "";
4366                                 int token_counter = 0;
4367
4368                                 while (!out.eof())
4369                                 {
4370                                         out >> token;
4371                                         line5 = line5 + token + " ";
4372                                         token_counter++;
4373
4374                                         if ((token_counter >= 13) || (out.eof() == true))
4375                                         {
4376                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4377                                                 line5 = "";
4378                                                 token_counter = 0;
4379                                         }
4380                                 }
4381                         }
4382                 }
4383                 else
4384                 {
4385                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4386                 }
4387                 return 1;
4388         }
4389
4390         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4391         {
4392                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4393                 {
4394                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4395                         {
4396                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4397                                 if (!CheckDupe)
4398                                 {
4399                                         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);
4400                                         ConnectServer(&(*x));
4401                                         return 1;
4402                                 }
4403                                 else
4404                                 {
4405                                         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());
4406                                         return 1;
4407                                 }
4408                         }
4409                 }
4410                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4411                 return 1;
4412         }
4413
4414         virtual int OnStats(char statschar, userrec* user, string_list &results)
4415         {
4416                 if (statschar == 'c')
4417                 {
4418                         for (unsigned int i = 0; i < Utils->LinkBlocks.size(); i++)
4419                         {
4420                                 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');
4421                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+Utils->LinkBlocks[i].Name.c_str());
4422                         }
4423                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4424                         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);
4425                         return 1;
4426                 }
4427                 return 0;
4428         }
4429
4430         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4431         {
4432                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4433                 if (!validated)
4434                         return 0;
4435
4436                 if (command == "CONNECT")
4437                 {
4438                         return this->HandleConnect(parameters,pcnt,user);
4439                 }
4440                 else if (command == "STATS")
4441                 {
4442                         return this->HandleStats(parameters,pcnt,user);
4443                 }
4444                 else if (command == "MOTD")
4445                 {
4446                         return this->HandleMotd(parameters,pcnt,user);
4447                 }
4448                 else if (command == "ADMIN")
4449                 {
4450                         return this->HandleAdmin(parameters,pcnt,user);
4451                 }
4452                 else if (command == "SQUIT")
4453                 {
4454                         return this->HandleSquit(parameters,pcnt,user);
4455                 }
4456                 else if (command == "MAP")
4457                 {
4458                         this->HandleMap(parameters,pcnt,user);
4459                         return 1;
4460                 }
4461                 else if ((command == "TIME") && (pcnt > 0))
4462                 {
4463                         return this->HandleTime(parameters,pcnt,user);
4464                 }
4465                 else if (command == "LUSERS")
4466                 {
4467                         this->HandleLusers(parameters,pcnt,user);
4468                         return 1;
4469                 }
4470                 else if (command == "LINKS")
4471                 {
4472                         this->HandleLinks(parameters,pcnt,user);
4473                         return 1;
4474                 }
4475                 else if (command == "WHOIS")
4476                 {
4477                         if (pcnt > 1)
4478                         {
4479                                 // remote whois
4480                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4481                         }
4482                 }
4483                 else if ((command == "VERSION") && (pcnt > 0))
4484                 {
4485                         this->HandleVersion(parameters,pcnt,user);
4486                         return 1;
4487                 }
4488
4489                 return 0;
4490         }
4491
4492         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4493         {
4494                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4495                 {
4496                         // this bit of code cleverly routes all module commands
4497                         // to all remote severs *automatically* so that modules
4498                         // can just handle commands locally, without having
4499                         // to have any special provision in place for remote
4500                         // commands and linking protocols.
4501                         std::deque<std::string> params;
4502                         params.clear();
4503                         for (int j = 0; j < pcnt; j++)
4504                         {
4505                                 if (strchr(parameters[j],' '))
4506                                 {
4507                                         params.push_back(":" + std::string(parameters[j]));
4508                                 }
4509                                 else
4510                                 {
4511                                         params.push_back(std::string(parameters[j]));
4512                                 }
4513                         }
4514                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4515                         Utils->DoOneToMany(user->nick,command,params);
4516                 }
4517         }
4518
4519         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4520         {
4521                 TreeServer* s = Utils->FindServer(servername);
4522                 if (s)
4523                 {
4524                         description = s->GetDesc();
4525                 }
4526         }
4527
4528         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4529         {
4530                 if (IS_LOCAL(source))
4531                 {
4532                         std::deque<std::string> params;
4533                         params.push_back(dest->nick);
4534                         params.push_back(channel->name);
4535                         Utils->DoOneToMany(source->nick,"INVITE",params);
4536                 }
4537         }
4538
4539         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4540         {
4541                 std::deque<std::string> params;
4542                 params.push_back(chan->name);
4543                 params.push_back(":"+topic);
4544                 Utils->DoOneToMany(user->nick,"TOPIC",params);
4545         }
4546
4547         virtual void OnWallops(userrec* user, const std::string &text)
4548         {
4549                 if (IS_LOCAL(user))
4550                 {
4551                         std::deque<std::string> params;
4552                         params.push_back(":"+text);
4553                         Utils->DoOneToMany(user->nick,"WALLOPS",params);
4554                 }
4555         }
4556
4557         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4558         {
4559                 if (target_type == TYPE_USER)
4560                 {
4561                         userrec* d = (userrec*)dest;
4562                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4563                         {
4564                                 std::deque<std::string> params;
4565                                 params.clear();
4566                                 params.push_back(d->nick);
4567                                 params.push_back(":"+text);
4568                                 Utils->DoOneToOne(user->nick,"NOTICE",params,d->server);
4569                         }
4570                 }
4571                 else if (target_type == TYPE_CHANNEL)
4572                 {
4573                         if (IS_LOCAL(user))
4574                         {
4575                                 chanrec *c = (chanrec*)dest;
4576                                 if (c)
4577                                 {
4578                                         std::string cname = c->name;
4579                                         if (status)
4580                                                 cname = status + cname;
4581                                         std::deque<TreeServer*> list;
4582                                         Utils->GetListOfServersForChannel(c,list);
4583                                         unsigned int ucount = list.size();
4584                                         for (unsigned int i = 0; i < ucount; i++)
4585                                         {
4586                                                 TreeSocket* Sock = list[i]->GetSocket();
4587                                                 if (Sock)
4588                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4589                                         }
4590                                 }
4591                         }
4592                 }
4593                 else if (target_type == TYPE_SERVER)
4594                 {
4595                         if (IS_LOCAL(user))
4596                         {
4597                                 char* target = (char*)dest;
4598                                 std::deque<std::string> par;
4599                                 par.push_back(target);
4600                                 par.push_back(":"+text);
4601                                 Utils->DoOneToMany(user->nick,"NOTICE",par);
4602                         }
4603                 }
4604         }
4605
4606         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4607         {
4608                 if (target_type == TYPE_USER)
4609                 {
4610                         // route private messages which are targetted at clients only to the server
4611                         // which needs to receive them
4612                         userrec* d = (userrec*)dest;
4613                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4614                         {
4615                                 std::deque<std::string> params;
4616                                 params.clear();
4617                                 params.push_back(d->nick);
4618                                 params.push_back(":"+text);
4619                                 Utils->DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4620                         }
4621                 }
4622                 else if (target_type == TYPE_CHANNEL)
4623                 {
4624                         if (IS_LOCAL(user))
4625                         {
4626                                 chanrec *c = (chanrec*)dest;
4627                                 if (c)
4628                                 {
4629                                         std::string cname = c->name;
4630                                         if (status)
4631                                                 cname = status + cname;
4632                                         std::deque<TreeServer*> list;
4633                                         Utils->GetListOfServersForChannel(c,list);
4634                                         unsigned int ucount = list.size();
4635                                         for (unsigned int i = 0; i < ucount; i++)
4636                                         {
4637                                                 TreeSocket* Sock = list[i]->GetSocket();
4638                                                 if (Sock)
4639                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4640                                         }
4641                                 }
4642                         }
4643                 }
4644                 else if (target_type == TYPE_SERVER)
4645                 {
4646                         if (IS_LOCAL(user))
4647                         {
4648                                 char* target = (char*)dest;
4649                                 std::deque<std::string> par;
4650                                 par.push_back(target);
4651                                 par.push_back(":"+text);
4652                                 Utils->DoOneToMany(user->nick,"PRIVMSG",par);
4653                         }
4654                 }
4655         }
4656
4657         virtual void OnBackgroundTimer(time_t curtime)
4658         {
4659                 AutoConnectServers(curtime);
4660                 DoPingChecks(curtime);
4661         }
4662
4663         virtual void OnUserJoin(userrec* user, chanrec* channel)
4664         {
4665                 // Only do this for local users
4666                 if (IS_LOCAL(user))
4667                 {
4668                         std::deque<std::string> params;
4669                         params.clear();
4670                         params.push_back(channel->name);
4671                         // set up their permissions and the channel TS with FJOIN.
4672                         // All users are FJOINed now, because a module may specify
4673                         // new joining permissions for the user.
4674                         params.clear();
4675                         params.push_back(channel->name);
4676                         params.push_back(ConvToStr(channel->age));
4677                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4678                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4679                 }
4680         }
4681
4682         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4683         {
4684                 // only occurs for local clients
4685                 if (user->registered != REG_ALL)
4686                         return;
4687                 std::deque<std::string> params;
4688                 params.push_back(newhost);
4689                 Utils->DoOneToMany(user->nick,"FHOST",params);
4690         }
4691
4692         virtual void OnChangeName(userrec* user, const std::string &gecos)
4693         {
4694                 // only occurs for local clients
4695                 if (user->registered != REG_ALL)
4696                         return;
4697                 std::deque<std::string> params;
4698                 params.push_back(gecos);
4699                 Utils->DoOneToMany(user->nick,"FNAME",params);
4700         }
4701
4702         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4703         {
4704                 if (IS_LOCAL(user))
4705                 {
4706                         std::deque<std::string> params;
4707                         params.push_back(channel->name);
4708                         if (partmessage != "")
4709                                 params.push_back(":"+partmessage);
4710                         Utils->DoOneToMany(user->nick,"PART",params);
4711                 }
4712         }
4713
4714         virtual void OnUserConnect(userrec* user)
4715         {
4716                 char agestr[MAXBUF];
4717                 if (IS_LOCAL(user))
4718                 {
4719                         std::deque<std::string> params;
4720                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4721                         params.push_back(agestr);
4722                         params.push_back(user->nick);
4723                         params.push_back(user->host);
4724                         params.push_back(user->dhost);
4725                         params.push_back(user->ident);
4726                         params.push_back("+"+std::string(user->FormatModes()));
4727                         params.push_back(user->GetIPString());
4728                         params.push_back(":"+std::string(user->fullname));
4729                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4730
4731                         // User is Local, change needs to be reflected!
4732                         TreeServer* SourceServer = Utils->FindServer(user->server);
4733                         if (SourceServer)
4734                         {
4735                                 SourceServer->AddUserCount();
4736                         }
4737
4738                 }
4739         }
4740
4741         virtual void OnUserQuit(userrec* user, const std::string &reason)
4742         {
4743                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4744                 {
4745                         std::deque<std::string> params;
4746                         params.push_back(":"+reason);
4747                         Utils->DoOneToMany(user->nick,"QUIT",params);
4748                 }
4749                 // Regardless, We need to modify the user Counts..
4750                 TreeServer* SourceServer = Utils->FindServer(user->server);
4751                 if (SourceServer)
4752                 {
4753                         SourceServer->DelUserCount();
4754                 }
4755
4756         }
4757
4758         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4759         {
4760                 if (IS_LOCAL(user))
4761                 {
4762                         std::deque<std::string> params;
4763                         params.push_back(user->nick);
4764                         Utils->DoOneToMany(oldnick,"NICK",params);
4765                 }
4766         }
4767
4768         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4769         {
4770                 if ((source) && (IS_LOCAL(source)))
4771                 {
4772                         std::deque<std::string> params;
4773                         params.push_back(chan->name);
4774                         params.push_back(user->nick);
4775                         params.push_back(":"+reason);
4776                         Utils->DoOneToMany(source->nick,"KICK",params);
4777                 }
4778                 else if (!source)
4779                 {
4780                         std::deque<std::string> params;
4781                         params.push_back(chan->name);
4782                         params.push_back(user->nick);
4783                         params.push_back(":"+reason);
4784                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4785                 }
4786         }
4787
4788         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4789         {
4790                 std::deque<std::string> params;
4791                 params.push_back(dest->nick);
4792                 params.push_back(":"+reason);
4793                 Utils->DoOneToMany(source->nick,"KILL",params);
4794         }
4795
4796         virtual void OnRehash(const std::string &parameter)
4797         {
4798                 if (parameter != "")
4799                 {
4800                         std::deque<std::string> params;
4801                         params.push_back(parameter);
4802                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4803                         // check for self
4804                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4805                         {
4806                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4807                                 ServerInstance->RehashServer();
4808                         }
4809                 }
4810                 Utils->ReadConfiguration(false);
4811         }
4812
4813         // note: the protocol does not allow direct umode +o except
4814         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4815         // locally.
4816         virtual void OnOper(userrec* user, const std::string &opertype)
4817         {
4818                 if (IS_LOCAL(user))
4819                 {
4820                         std::deque<std::string> params;
4821                         params.push_back(opertype);
4822                         Utils->DoOneToMany(user->nick,"OPERTYPE",params);
4823                 }
4824         }
4825
4826         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4827         {
4828                 if (IS_LOCAL(source))
4829                 {
4830                         char type[8];
4831                         snprintf(type,8,"%cLINE",linetype);
4832                         std::string stype = type;
4833                         if (adding)
4834                         {
4835                                 char sduration[MAXBUF];
4836                                 snprintf(sduration,MAXBUF,"%ld",duration);
4837                                 std::deque<std::string> params;
4838                                 params.push_back(host);
4839                                 params.push_back(sduration);
4840                                 params.push_back(":"+reason);
4841                                 Utils->DoOneToMany(source->nick,stype,params);
4842                         }
4843                         else
4844                         {
4845                                 std::deque<std::string> params;
4846                                 params.push_back(host);
4847                                 Utils->DoOneToMany(source->nick,stype,params);
4848                         }
4849                 }
4850         }
4851
4852         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4853         {
4854                 OnLine(source,hostmask,true,'G',duration,reason);
4855         }
4856
4857         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4858         {
4859                 OnLine(source,ipmask,true,'Z',duration,reason);
4860         }
4861
4862         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4863         {
4864                 OnLine(source,nickmask,true,'Q',duration,reason);
4865         }
4866
4867         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4868         {
4869                 OnLine(source,hostmask,true,'E',duration,reason);
4870         }
4871
4872         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4873         {
4874                 OnLine(source,hostmask,false,'G',0,"");
4875         }
4876
4877         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4878         {
4879                 OnLine(source,ipmask,false,'Z',0,"");
4880         }
4881
4882         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4883         {
4884                 OnLine(source,nickmask,false,'Q',0,"");
4885         }
4886
4887         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4888         {
4889                 OnLine(source,hostmask,false,'E',0,"");
4890         }
4891
4892         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4893         {
4894                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4895                 {
4896                         if (target_type == TYPE_USER)
4897                         {
4898                                 userrec* u = (userrec*)dest;
4899                                 std::deque<std::string> params;
4900                                 params.push_back(u->nick);
4901                                 params.push_back(text);
4902                                 Utils->DoOneToMany(user->nick,"MODE",params);
4903                         }
4904                         else
4905                         {
4906                                 chanrec* c = (chanrec*)dest;
4907                                 std::deque<std::string> params;
4908                                 params.push_back(c->name);
4909                                 params.push_back(text);
4910                                 Utils->DoOneToMany(user->nick,"MODE",params);
4911                         }
4912                 }
4913         }
4914
4915         virtual void OnSetAway(userrec* user)
4916         {
4917                 if (IS_LOCAL(user))
4918                 {
4919                         std::deque<std::string> params;
4920                         params.push_back(":"+std::string(user->awaymsg));
4921                         Utils->DoOneToMany(user->nick,"AWAY",params);
4922                 }
4923         }
4924
4925         virtual void OnCancelAway(userrec* user)
4926         {
4927                 if (IS_LOCAL(user))
4928                 {
4929                         std::deque<std::string> params;
4930                         params.clear();
4931                         Utils->DoOneToMany(user->nick,"AWAY",params);
4932                 }
4933         }
4934
4935         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4936         {
4937                 TreeSocket* s = (TreeSocket*)opaque;
4938                 if (target)
4939                 {
4940                         if (target_type == TYPE_USER)
4941                         {
4942                                 userrec* u = (userrec*)target;
4943                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4944                         }
4945                         else
4946                         {
4947                                 chanrec* c = (chanrec*)target;
4948                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4949                         }
4950                 }
4951         }
4952
4953         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4954         {
4955                 TreeSocket* s = (TreeSocket*)opaque;
4956                 if (target)
4957                 {
4958                         if (target_type == TYPE_USER)
4959                         {
4960                                 userrec* u = (userrec*)target;
4961                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4962                         }
4963                         else if (target_type == TYPE_OTHER)
4964                         {
4965                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4966                         }
4967                         else if (target_type == TYPE_CHANNEL)
4968                         {
4969                                 chanrec* c = (chanrec*)target;
4970                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4971                         }
4972                 }
4973         }
4974
4975         virtual void OnEvent(Event* event)
4976         {
4977                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4978
4979                 if (event->GetEventID() == "send_metadata")
4980                 {
4981                         if (params->size() < 3)
4982                                 return;
4983                         (*params)[2] = ":" + (*params)[2];
4984                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4985                 }
4986                 else if (event->GetEventID() == "send_topic")
4987                 {
4988                         if (params->size() < 2)
4989                                 return;
4990                         (*params)[1] = ":" + (*params)[1];
4991                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
4992                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time()));
4993                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
4994                 }
4995                 else if (event->GetEventID() == "send_mode")
4996                 {
4997                         if (params->size() < 2)
4998                                 return;
4999                         // Insert the TS value of the object, either userrec or chanrec
5000                         time_t ourTS = 0;
5001                         userrec* a = ServerInstance->FindNick((*params)[0]);
5002                         if (a)
5003                         {
5004                                 ourTS = a->age;
5005                         }
5006                         else
5007                         {
5008                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
5009                                 if (a)
5010                                 {
5011                                         ourTS = a->age;
5012                                 }
5013                         }
5014                         params->insert(params->begin() + 1,ConvToStr(ourTS));
5015                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
5016                 }
5017         }
5018
5019         virtual ~ModuleSpanningTree()
5020         {
5021                 ServerInstance->Log(DEBUG,"Performing unload of spanningtree!");
5022                 /* This will also free the listeners */
5023                 delete Utils;
5024         }
5025
5026         virtual Version GetVersion()
5027         {
5028                 return Version(1,1,0,2,VF_VENDOR,API_VERSION);
5029         }
5030
5031         void Implements(char* List)
5032         {
5033                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
5034                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
5035                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
5036                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
5037                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
5038                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
5039                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
5040         }
5041
5042         /* It is IMPORTANT that m_spanningtree is the last module in the chain
5043          * so that any activity it sees is FINAL, e.g. we arent going to send out
5044          * a NICK message before m_cloaking has finished putting the +x on the user,
5045          * etc etc.
5046          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
5047          * the module call queue.
5048          */
5049         Priority Prioritize()
5050         {
5051                 return PRIORITY_LAST;
5052         }
5053 };
5054
5055 void SpanningTreeUtilities::DoFailOver(Link* x)
5056 {
5057         if (x->FailOver.length())
5058         {
5059                 if (x->FailOver == x->Name)
5060                 {
5061                         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());
5062                         return;
5063                 }
5064                 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
5065                 if (TryThisOne)
5066                 {
5067                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
5068                         Creator->ConnectServer(TryThisOne);
5069                 }
5070                 else
5071                 {
5072                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
5073                 }
5074         }
5075 }
5076
5077 Link* SpanningTreeUtilities::FindLink(const std::string& name)
5078 {
5079         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
5080         {
5081                 if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
5082                 {
5083                         return &(*x);
5084                 }
5085         }
5086         return NULL;
5087 }
5088
5089
5090 class ModuleSpanningTreeFactory : public ModuleFactory
5091 {
5092  public:
5093         ModuleSpanningTreeFactory()
5094         {
5095         }
5096
5097         ~ModuleSpanningTreeFactory()
5098         {
5099         }
5100
5101         virtual Module * CreateModule(InspIRCd* Me)
5102         {
5103                 return new ModuleSpanningTree(Me);
5104         }
5105
5106 };
5107
5108
5109 extern "C" void * init_module( void )
5110 {
5111         return new ModuleSpanningTreeFactory;
5112 }