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         int Timeout;
 104 };
 105
 106 /** Contains helper functions and variables for this module,
 107  * and keeps them out of the global namespace
 108  */
 109 class SpanningTreeUtilities
 110 {
 111  private:
 112         /** Creator server
 113          */
 114         InspIRCd* ServerInstance;
 115  public:
 116         /** Creator module
 117          */
 118         ModuleSpanningTree* Creator;
 119         /** Flatten links and /MAP for non-opers
 120          */
 121         bool FlatLinks;
 122         /** Hide U-Lined servers in /MAP and /LINKS
 123          */
 124         bool HideULines;
 125         /** Announce TS changes to channels on merge
 126          */
 127         bool AnnounceTSChange;
 128         /** Socket bindings for listening sockets
 129          */
 130         std::vector<TreeSocket*> Bindings;
 131         /** This variable represents the root of the server tree
 132          */
 133         TreeServer *TreeRoot;
 134         /** IPs allowed to link to us
 135          */
 136         std::vector<std::string> ValidIPs;
 137         /** Hash of currently connected servers by name
 138          */
 139         server_hash serverlist;
 140         /** Holds the data from the <link> tags in the conf
 141          */
 142         std::vector<Link> LinkBlocks;
 143
 144         /** Initialise utility class
 145          */
 146         SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* Creator);
 147         /** Destroy class and free listeners etc
 148          */
 149         ~SpanningTreeUtilities();
 150         /** Send a message from this server to one other local or remote
 151          */
 152         bool DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target);
 153         /** Send a message from this server to all but one other, local or remote
 154          */
 155         bool DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit);
 156         /** Send a message from this server to all but one other, local or remote
 157          */
 158         bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 159         /** Send a message from this server to all others
 160          */
 161         bool DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params);
 162         /** Send a message from this server to all others
 163          */
 164         bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 165         /** 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)
 166          */
 167         bool DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params);
 168         /** Read the spanningtree module's tags from the config file
 169          */
 170         void ReadConfiguration(bool rebind);
 171         /** Add a server to the server list for GetListOfServersForChannel
 172          */
 173         void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list);
 174         /** Compile a list of servers which contain members of channel c
 175          */
 176         void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list);
 177         /** Find a server by name
 178          */
 179         TreeServer* FindServer(const std::string &ServerName);
 180         /** Find a route to a server by name
 181          */
 182         TreeServer* BestRouteTo(const std::string &ServerName);
 183         /** Find a server by glob mask
 184          */
 185         TreeServer* FindServerMask(const std::string &ServerName);
 186         /** Returns true if this is a server name we recognise
 187          */
 188         bool IsServer(const std::string &ServerName);
 189         /** Attempt to connect to the failover link of link x
 190          */
 191         void DoFailOver(Link* x);
 192         /** Find a link tag from a server name
 193          */
 194         Link* FindLink(const std::string& name);
 195 };
 196
 197
 198 /** Each server in the tree is represented by one class of
 199  * type TreeServer. A locally connected TreeServer can
 200  * have a class of type TreeSocket associated with it, for
 201  * remote servers, the TreeSocket entry will be NULL.
 202  * Each server also maintains a pointer to its parent
 203  * (NULL if this server is ours, at the top of the tree)
 204  * and a pointer to its "Route" (see the comments in the
 205  * constructors below), and also a dynamic list of pointers
 206  * to its children which can be iterated recursively
 207  * if required. Creating or deleting objects of type
 208  i* TreeServer automatically maintains the hash_map of
 209  * TreeServer items, deleting and inserting them as they
 210  * are created and destroyed.
 211  */
 212 class TreeServer : public classbase
 213 {
 214         InspIRCd* ServerInstance;               /* Creator */
 215         TreeServer* Parent;                     /* Parent entry */
 216         TreeServer* Route;                      /* Route entry */
 217         std::vector<TreeServer*> Children;      /* List of child objects */
 218         irc::string ServerName;                 /* Server's name */
 219         std::string ServerDesc;                 /* Server's description */
 220         std::string VersionString;              /* Version string or empty string */
 221         int UserCount;                          /* Not used in this version */
 222         int OperCount;                          /* Not used in this version */
 223         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 224         time_t NextPing;                        /* After this time, the server should be PINGed*/
 225         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 226         SpanningTreeUtilities* Utils;           /* Utility class */
 227
 228  public:
 229
 230         /** We don't use this constructor. Its a dummy, and won't cause any insertion
 231          * of the TreeServer into the hash_map. See below for the two we DO use.
 232          */
 233         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance) : ServerInstance(Instance), Utils(Util)
 234         {
 235                 Parent = NULL;
 236                 ServerName = "";
 237                 ServerDesc = "";
 238                 VersionString = "";
 239                 UserCount = OperCount = 0;
 240                 VersionString = ServerInstance->GetVersionString();
 241         }
 242
 243         /** We use this constructor only to create the 'root' item, Utils->TreeRoot, which
 244          * represents our own server. Therefore, it has no route, no parent, and
 245          * no socket associated with it. Its version string is our own local version.
 246          */
 247         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc), Utils(Util)
 248         {
 249                 Parent = NULL;
 250                 VersionString = "";
 251                 UserCount = ServerInstance->UserCount();
 252                 OperCount = ServerInstance->OperCount();
 253                 VersionString = ServerInstance->GetVersionString();
 254                 Route = NULL;
 255                 Socket = NULL; /* Fix by brain */
 256                 AddHashEntry();
 257         }
 258
 259         /** When we create a new server, we call this constructor to initialize it.
 260          * This constructor initializes the server's Route and Parent, and sets up
 261          * its ping counters so that it will be pinged one minute from now.
 262          */
 263         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 264                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock), Utils(Util)
 265         {
 266                 VersionString = "";
 267                 UserCount = OperCount = 0;
 268                 this->SetNextPingTime(time(NULL) + 60);
 269                 this->SetPingFlag();
 270
 271                 /* find the 'route' for this server (e.g. the one directly connected
 272                  * to the local server, which we can use to reach it)
 273                  *
 274                  * In the following example, consider we have just added a TreeServer
 275                  * class for server G on our network, of which we are server A.
 276                  * To route traffic to G (marked with a *) we must send the data to
 277                  * B (marked with a +) so this algorithm initializes the 'Route'
 278                  * value to point at whichever server traffic must be routed through
 279                  * to get here. If we were to try this algorithm with server B,
 280                  * the Route pointer would point at its own object ('this').
 281                  *
 282                  *              A
 283                  *             / \
 284                  *          + B   C
 285                  *           / \   \
 286                  *          D   E   F
 287                  *         /         \
 288                  *      * G           H
 289                  *
 290                  * We only run this algorithm when a server is created, as
 291                  * the routes remain constant while ever the server exists, and
 292                  * do not need to be re-calculated.
 293                  */
 294
 295                 Route = Above;
 296                 if (Route == Utils->TreeRoot)
 297                 {
 298                         Route = this;
 299                 }
 300                 else
 301                 {
 302                         while (this->Route->GetParent() != Utils->TreeRoot)
 303                         {
 304                                 this->Route = Route->GetParent();
 305                         }
 306                 }
 307
 308                 /* Because recursive code is slow and takes a lot of resources,
 309                  * we store two representations of the server tree. The first
 310                  * is a recursive structure where each server references its
 311                  * children and its parent, which is used for netbursts and
 312                  * netsplits to dump the whole dataset to the other server,
 313                  * and the second is used for very fast lookups when routing
 314                  * messages and is instead a hash_map, where each item can
 315                  * be referenced by its server name. The AddHashEntry()
 316                  * call below automatically inserts each TreeServer class
 317                  * into the hash_map as it is created. There is a similar
 318                  * maintainance call in the destructor to tidy up deleted
 319                  * servers.
 320                  */
 321
 322                 this->AddHashEntry();
 323         }
 324
 325         int QuitUsers(const std::string &reason)
 326         {
 327                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 328                 const char* reason_s = reason.c_str();
 329                 std::vector<userrec*> time_to_die;
 330                 for (user_hash::iterator n = ServerInstance->clientlist.begin(); n != ServerInstance->clientlist.end(); n++)
 331                 {
 332                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 333                         {
 334                                 time_to_die.push_back(n->second);
 335                         }
 336                 }
 337                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 338                 {
 339                         userrec* a = (userrec*)*n;
 340                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 341                         if (!IS_LOCAL(a))
 342                                 userrec::QuitUser(ServerInstance,a,reason_s);
 343                 }
 344                 return time_to_die.size();
 345         }
 346
 347         /** This method is used to add the structure to the
 348          * hash_map for linear searches. It is only called
 349          * by the constructors.
 350          */
 351         void AddHashEntry()
 352         {
 353                 server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str());
 354                 if (iter == Utils->serverlist.end())
 355                         Utils->serverlist[this->ServerName.c_str()] = this;
 356         }
 357
 358         /** This method removes the reference to this object
 359          * from the hash_map which is used for linear searches.
 360          * It is only called by the default destructor.
 361          */
 362         void DelHashEntry()
 363         {
 364                 server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str());
 365                 if (iter != Utils->serverlist.end())
 366                         Utils->serverlist.erase(iter);
 367         }
 368
 369         /** These accessors etc should be pretty self-
 370          * explanitory.
 371          */
 372         TreeServer* GetRoute()
 373         {
 374                 return Route;
 375         }
 376
 377         std::string GetName()
 378         {
 379                 return ServerName.c_str();
 380         }
 381
 382         std::string GetDesc()
 383         {
 384                 return ServerDesc;
 385         }
 386
 387         std::string GetVersion()
 388         {
 389                 return VersionString;
 390         }
 391
 392         void SetNextPingTime(time_t t)
 393         {
 394                 this->NextPing = t;
 395                 LastPingWasGood = false;
 396         }
 397
 398         time_t NextPingTime()
 399         {
 400                 return NextPing;
 401         }
 402
 403         bool AnsweredLastPing()
 404         {
 405                 return LastPingWasGood;
 406         }
 407
 408         void SetPingFlag()
 409         {
 410                 LastPingWasGood = true;
 411         }
 412
 413         int GetUserCount()
 414         {
 415                 return UserCount;
 416         }
 417
 418         void AddUserCount()
 419         {
 420                 UserCount++;
 421         }
 422
 423         void DelUserCount()
 424         {
 425                 UserCount--;
 426         }
 427
 428         int GetOperCount()
 429         {
 430                 return OperCount;
 431         }
 432
 433         TreeSocket* GetSocket()
 434         {
 435                 return Socket;
 436         }
 437
 438         TreeServer* GetParent()
 439         {
 440                 return Parent;
 441         }
 442
 443         void SetVersion(const std::string &Version)
 444         {
 445                 VersionString = Version;
 446         }
 447
 448         unsigned int ChildCount()
 449         {
 450                 return Children.size();
 451         }
 452
 453         TreeServer* GetChild(unsigned int n)
 454         {
 455                 if (n < Children.size())
 456                 {
 457                         /* Make sure they  cant request
 458                          * an out-of-range object. After
 459                          * all we know what these programmer
 460                          * types are like *grin*.
 461                          */
 462                         return Children[n];
 463                 }
 464                 else
 465                 {
 466                         return NULL;
 467                 }
 468         }
 469
 470         void AddChild(TreeServer* Child)
 471         {
 472                 Children.push_back(Child);
 473         }
 474
 475         bool DelChild(TreeServer* Child)
 476         {
 477                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 478                 {
 479                         if (*a == Child)
 480                         {
 481                                 Children.erase(a);
 482                                 return true;
 483                         }
 484                 }
 485                 return false;
 486         }
 487
 488         /** Removes child nodes of this node, and of that node, etc etc.
 489          * This is used during netsplits to automatically tidy up the
 490          * server tree. It is slow, we don't use it for much else.
 491          */
 492         bool Tidy()
 493         {
 494                 bool stillchildren = true;
 495                 while (stillchildren)
 496                 {
 497                         stillchildren = false;
 498                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 499                         {
 500                                 TreeServer* s = (TreeServer*)*a;
 501                                 s->Tidy();
 502                                 Children.erase(a);
 503                                 DELETE(s);
 504                                 stillchildren = true;
 505                                 break;
 506                         }
 507                 }
 508                 return true;
 509         }
 510
 511         ~TreeServer()
 512         {
 513                 /* We'd better tidy up after ourselves, eh? */
 514                 this->DelHashEntry();
 515         }
 516 };
 517
 518 /** Yay for fast searches!
 519  * This is hundreds of times faster than recursion
 520  * or even scanning a linked list, especially when
 521  * there are more than a few servers to deal with.
 522  * (read as: lots).
 523  */
 524 TreeServer* SpanningTreeUtilities::FindServer(const std::string &ServerName)
 525 {
 526         server_hash::iterator iter;
 527         iter = serverlist.find(ServerName.c_str());
 528         if (iter != serverlist.end())
 529         {
 530                 return iter->second;
 531         }
 532         else
 533         {
 534                 return NULL;
 535         }
 536 }
 537
 538 /** Returns the locally connected server we must route a
 539  * message through to reach server 'ServerName'. This
 540  * only applies to one-to-one and not one-to-many routing.
 541  * See the comments for the constructor of TreeServer
 542  * for more details.
 543  */
 544 TreeServer* SpanningTreeUtilities::BestRouteTo(const std::string &ServerName)
 545 {
 546         if (ServerName.c_str() == TreeRoot->GetName())
 547                 return NULL;
 548         TreeServer* Found = FindServer(ServerName);
 549         if (Found)
 550         {
 551                 return Found->GetRoute();
 552         }
 553         else
 554         {
 555                 return NULL;
 556         }
 557 }
 558
 559 /** Find the first server matching a given glob mask.
 560  * Theres no find-using-glob method of hash_map [awwww :-(]
 561  * so instead, we iterate over the list using an iterator
 562  * and match each one until we get a hit. Yes its slow,
 563  * deal with it.
 564  */
 565 TreeServer* SpanningTreeUtilities::FindServerMask(const std::string &ServerName)
 566 {
 567         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 568         {
 569                 if (match(i->first.c_str(),ServerName.c_str()))
 570                         return i->second;
 571         }
 572         return NULL;
 573 }
 574
 575 /* A convenient wrapper that returns true if a server exists */
 576 bool SpanningTreeUtilities::IsServer(const std::string &ServerName)
 577 {
 578         return (FindServer(ServerName) != NULL);
 579 }
 580
 581
 582 /** Handle /RCONNECT
 583  */
 584 class cmd_rconnect : public command_t
 585 {
 586         Module* Creator;
 587         SpanningTreeUtilities* Utils;
 588  public:
 589         cmd_rconnect (InspIRCd* Instance, Module* Callback, SpanningTreeUtilities* Util) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback), Utils(Util)
 590         {
 591                 this->source = "m_spanningtree.so";
 592                 syntax = "<remote-server-mask> <servermask>";
 593         }
 594
 595         CmdResult Handle (const char** parameters, int pcnt, userrec *user)
 596         {
 597                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 598                 /* Is this aimed at our server? */
 599                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 600                 {
 601                         /* Yes, initiate the given connect */
 602                         ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 603                         const char* para[1];
 604                         para[0] = parameters[1];
 605                         std::string original_command = std::string("CONNECT ") + parameters[1];
 606                         Creator->OnPreCommand("CONNECT", para, 1, user, true, original_command);
 607
 608                         return CMD_SUCCESS;
 609                 }
 610
 611                 return CMD_FAILURE;
 612         }
 613 };
 614
 615
 616
 617 /** Every SERVER connection inbound or outbound is represented by
 618  * an object of type TreeSocket.
 619  * TreeSockets, being inherited from InspSocket, can be tied into
 620  * the core socket engine, and we cn therefore receive activity events
 621  * for them, just like activex objects on speed. (yes really, that
 622  * is a technical term!) Each of these which relates to a locally
 623  * connected server is assocated with it, by hooking it onto a
 624  * TreeSocket class using its constructor. In this way, we can
 625  * maintain a list of servers, some of which are directly connected,
 626  * some of which are not.
 627  */
 628 class TreeSocket : public InspSocket
 629 {
 630         SpanningTreeUtilities* Utils;
 631         std::string myhost;
 632         std::string in_buffer;
 633         ServerState LinkState;
 634         std::string InboundServerName;
 635         std::string InboundDescription;
 636         int num_lost_users;
 637         int num_lost_servers;
 638         time_t NextPing;
 639         bool LastPingWasGood;
 640         bool bursting;
 641         AES* ctx_in;
 642         AES* ctx_out;
 643         unsigned int keylength;
 644         std::string ModuleList;
 645         std::map<std::string,std::string> CapKeys;
 646
 647  public:
 648
 649         /** Because most of the I/O gubbins are encapsulated within
 650          * InspSocket, we just call the superclass constructor for
 651          * most of the action, and append a few of our own values
 652          * to it.
 653          */
 654         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime)
 655                 : InspSocket(SI, host, port, listening, maxtime), Utils(Util)
 656         {
 657                 myhost = host;
 658                 this->LinkState = LISTENER;
 659                 this->ctx_in = NULL;
 660                 this->ctx_out = NULL;
 661         }
 662
 663         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 664                 : InspSocket(SI, host, port, listening, maxtime), Utils(Util)
 665         {
 666                 myhost = ServerName;
 667                 this->LinkState = CONNECTING;
 668                 this->ctx_in = NULL;
 669                 this->ctx_out = NULL;
 670         }
 671
 672         /** When a listening socket gives us a new file descriptor,
 673          * we must associate it with a socket without creating a new
 674          * connection. This constructor is used for this purpose.
 675          */
 676         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip)
 677                 : InspSocket(SI, newfd, ip), Utils(Util)
 678         {
 679                 this->LinkState = WAIT_AUTH_1;
 680                 this->ctx_in = NULL;
 681                 this->ctx_out = NULL;
 682                 this->SendCapabilities();
 683         }
 684
 685         ~TreeSocket()
 686         {
 687                 if (ctx_in)
 688                         DELETE(ctx_in);
 689                 if (ctx_out)
 690                         DELETE(ctx_out);
 691         }
 692
 693         void InitAES(std::string key,std::string SName)
 694         {
 695                 if (key == "")
 696                         return;
 697
 698                 ctx_in = new AES();
 699                 ctx_out = new AES();
 700                 Instance->Log(DEBUG,"Initialized AES key %s",key.c_str());
 701                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 702                 keylength = key.length();
 703                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 704                 {
 705                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 706                         Instance->Log(DEBUG,"Key length not 16, 24 or 32 characters!");
 707                 }
 708                 else
 709                 {
 710                         if (this->GetState() != I_ERROR)
 711                         {
 712                                 this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 713                                 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\
 714                                         \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);
 715                                 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\
 716                                         \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);
 717                         }
 718                 }
 719         }
 720
 721         /** When an outbound connection finishes connecting, we receive
 722          * this event, and must send our SERVER string to the other
 723          * side. If the other side is happy, as outlined in the server
 724          * to server docs on the inspircd.org site, the other side
 725          * will then send back its own server string.
 726          */
 727         virtual bool OnConnected()
 728         {
 729                 if (this->LinkState == CONNECTING)
 730                 {
 731                         /* we do not need to change state here. */
 732                         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 733                         {
 734                                 if (x->Name == this->myhost)
 735                                 {
 736                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
 737                                         this->SendCapabilities();
 738                                         if (x->EncryptionKey != "")
 739                                         {
 740                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 741                                                 {
 742                                                         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.");
 743                                                 }
 744                                                 else
 745                                                 {
 746                                                         this->WriteLine(std::string("AES ")+this->Instance->Config->ServerName);
 747                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 748                                                 }
 749                                         }
 750                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 751                                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 752                                         return true;
 753                                 }
 754                         }
 755                 }
 756                 /* There is a (remote) chance that between the /CONNECT and the connection
 757                  * being accepted, some muppet has removed the <link> block and rehashed.
 758                  * If that happens the connection hangs here until it's closed. Unlikely
 759                  * and rather harmless.
 760                  */
 761                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 762                 return true;
 763         }
 764
 765         virtual void OnError(InspSocketError e)
 766         {
 767                 /* We don't handle this method, because all our
 768                  * dirty work is done in OnClose() (see below)
 769                  * which is still called on error conditions too.
 770                  */
 771                 if (e == I_ERR_CONNECT)
 772                 {
 773                         this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
 774                         Link* MyLink = Utils->FindLink(myhost);
 775                         if (MyLink)
 776                                 Utils->DoFailOver(MyLink);
 777                 }
 778         }
 779
 780         virtual int OnDisconnect()
 781         {
 782                 /* For the same reason as above, we don't
 783                  * handle OnDisconnect()
 784                  */
 785                 return true;
 786         }
 787
 788         /** Recursively send the server tree with distances as hops.
 789          * This is used during network burst to inform the other server
 790          * (and any of ITS servers too) of what servers we know about.
 791          * If at any point any of these servers already exist on the other
 792          * end, our connection may be terminated. The hopcounts given
 793          * by this function are relative, this doesn't matter so long as
 794          * they are all >1, as all the remote servers re-calculate them
 795          * to be relative too, with themselves as hop 0.
 796          */
 797         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 798         {
 799                 char command[1024];
 800                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 801                 {
 802                         TreeServer* recursive_server = Current->GetChild(q);
 803                         if (recursive_server != s)
 804                         {
 805                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 806                                 this->WriteLine(command);
 807                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 808                                 /* down to next level */
 809                                 this->SendServers(recursive_server, s, hops+1);
 810                         }
 811                 }
 812         }
 813
 814         std::string MyCapabilities()
 815         {
 816                 std::vector<std::string> modlist;
 817                 std::string capabilities = "";
 818
 819                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 820                 {
 821                         if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
 822                                 modlist.push_back(this->Instance->Config->module_names[i]);
 823                 }
 824                 sort(modlist.begin(),modlist.end());
 825                 for (unsigned int i = 0; i < modlist.size(); i++)
 826                 {
 827                         if (i)
 828                                 capabilities = capabilities + ",";
 829                         capabilities = capabilities + modlist[i];
 830                 }
 831                 return capabilities;
 832         }
 833
 834         void SendCapabilities()
 835         {
 836                 irc::commasepstream modulelist(MyCapabilities());
 837
 838                 this->WriteLine("CAPAB START");
 839
 840                 /* Send module names, split at 509 length */
 841                 std::string item = "*";
 842                 std::string line = "CAPAB MODULES ";
 843                 while ((item = modulelist.GetToken()) != "")
 844                 {
 845                         if (line.length() + item.length() + 1 > 509)
 846                         {
 847                                 this->WriteLine(line);
 848                                 line = "CAPAB MODULES ";
 849                         }
 850
 851                         if (line != "CAPAB MODULES ")
 852                                 line.append(",");
 853
 854                         line.append(item);
 855                 }
 856                 if (line != "CAPAB MODULES ")
 857                         this->WriteLine(line);
 858
 859                 int ip6 = 0;
 860                 int ip6support = 0;
 861 #ifdef IPV6
 862                 ip6 = 1;
 863 #endif
 864 #ifdef SUPPORT_IP6LINKS
 865                 ip6support = 1;
 866 #endif
 867                 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));
 868
 869                 this->WriteLine("CAPAB END");
 870         }
 871
 872         /* Check a comma seperated list for an item */
 873         bool HasItem(const std::string &list, const std::string &item)
 874         {
 875                 irc::commasepstream seplist(list);
 876
 877                 std::string item2 = "*";
 878                 while ((item2 = seplist.GetToken()) != "")
 879                 {
 880                         if (item2 == item)
 881                                 return true;
 882                 }
 883
 884                 return false;
 885         }
 886
 887         /* Isolate and return the elements that are different between two comma seperated lists */
 888         std::string ListDifference(const std::string &one, const std::string &two)
 889         {
 890                 irc::commasepstream list_one(one);
 891                 std::string item = "*";
 892                 std::string result = "";
 893                 while ((item = list_one.GetToken()) != "")
 894                 {
 895                         if (!HasItem(two, item))
 896                         {
 897                                 result.append(" ");
 898                                 result.append(item);
 899                         }
 900                 }
 901                 return result;
 902         }
 903
 904         bool Capab(const std::deque<std::string> &params)
 905         {
 906                 if (params.size() < 1)
 907                 {
 908                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 909                         return false;
 910                 }
 911
 912                 if (params[0] == "START")
 913                 {
 914                         this->ModuleList = "";
 915                         this->CapKeys.clear();
 916                 }
 917                 else if (params[0] == "END")
 918                 {
 919                         std::string reason = "";
 920                         int ip6support = 0;
 921 #ifdef SUPPORT_IP6LINKS
 922                         ip6support = 1;
 923 #endif
 924                         /* Compare ModuleList and check CapKeys...
 925                          * Maybe this could be tidier? -- Brain
 926                          */
 927                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 928                         {
 929                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 930                                 if (!diff.length())
 931                                 {
 932                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 933                                 }
 934                                 else
 935                                 {
 936                                         diff = "this server:" + diff;
 937                                 }
 938                                 if (diff.length() == 12)
 939                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 940                                 else
 941                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 942                         }
 943
 944                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 945                                 reason = "We don't both support linking to IPV6 servers";
 946
 947                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 948                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 949
 950                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 951                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 952
 953                         if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
 954                         {
 955                                 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
 956                                 {
 957                                         reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
 958                                 }
 959                                 else
 960                                 {
 961                                         reason = "Protocol version not specified";
 962                                 }
 963                         }
 964
 965                         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))))
 966                                 reason = "We don't both have halfop support enabled/disabled identically";
 967
 968                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 969                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 970
 971                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 972                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 973
 974                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 975                                 reason = "Maximum modes per line differ or remote modes per line not specified";
 976
 977                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 978                                 reason = "Maximum quit lengths differ or remote quit length not specified";
 979
 980                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 981                                 reason = "Maximum topic lengths differ or remote topic length not specified";
 982
 983                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
 984                                 reason = "Maximum kick lengths differ or remote kick length not specified";
 985
 986                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
 987                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
 988
 989                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
 990                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
 991
 992                         if (reason.length())
 993                         {
 994                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
 995                                 return false;
 996                         }
 997                 }
 998                 else if ((params[0] == "MODULES") && (params.size() == 2))
 999                 {
1000                         if (!this->ModuleList.length())
1001                         {
1002                                 this->ModuleList.append(params[1]);
1003                         }
1004                         else
1005                         {
1006                                 this->ModuleList.append(",");
1007                                 this->ModuleList.append(params[1]);
1008                         }
1009                 }
1010                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
1011                 {
1012                         irc::tokenstream capabs(params[1]);
1013                         std::string item = "*";
1014                         while ((item = capabs.GetToken()) != "")
1015                         {
1016                                 /* Process each key/value pair */
1017                                 std::string::size_type equals = item.rfind('=');
1018                                 if (equals != std::string::npos)
1019                                 {
1020                                         std::string var = item.substr(0, equals);
1021                                         std::string value = item.substr(equals+1, item.length());
1022                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1023                                         CapKeys[var] = value;
1024                                 }
1025                         }
1026                 }
1027
1028                 return true;
1029         }
1030
1031         /** This function forces this server to quit, removing this server
1032          * and any users on it (and servers and users below that, etc etc).
1033          * It's very slow and pretty clunky, but luckily unless your network
1034          * is having a REAL bad hair day, this function shouldnt be called
1035          * too many times a month ;-)
1036          */
1037         void SquitServer(std::string &from, TreeServer* Current)
1038         {
1039                 /* recursively squit the servers attached to 'Current'.
1040                  * We're going backwards so we don't remove users
1041                  * while we still need them ;)
1042                  */
1043                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1044                 {
1045                         TreeServer* recursive_server = Current->GetChild(q);
1046                         this->SquitServer(from,recursive_server);
1047                 }
1048                 /* Now we've whacked the kids, whack self */
1049                 num_lost_servers++;
1050                 num_lost_users += Current->QuitUsers(from);
1051         }
1052
1053         /** This is a wrapper function for SquitServer above, which
1054          * does some validation first and passes on the SQUIT to all
1055          * other remaining servers.
1056          */
1057         void Squit(TreeServer* Current, const std::string &reason)
1058         {
1059                 if ((Current) && (Current != Utils->TreeRoot))
1060                 {
1061                         std::deque<std::string> params;
1062                         params.push_back(Current->GetName());
1063                         params.push_back(":"+reason);
1064                         Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1065                         if (Current->GetParent() == Utils->TreeRoot)
1066                         {
1067                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1068                         }
1069                         else
1070                         {
1071                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1072                         }
1073                         num_lost_servers = 0;
1074                         num_lost_users = 0;
1075                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1076                         SquitServer(from, Current);
1077                         Current->Tidy();
1078                         Current->GetParent()->DelChild(Current);
1079                         DELETE(Current);
1080                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1081                 }
1082                 else
1083                 {
1084                         Instance->Log(DEFAULT,"Squit from unknown server");
1085                 }
1086         }
1087
1088         /** FMODE command - server mode with timestamp checks */
1089         bool ForceMode(const std::string &source, std::deque<std::string> &params)
1090         {
1091                 /* Chances are this is a 1.0 FMODE without TS */
1092                 if (params.size() < 3)
1093                 {
1094                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
1095                         return false;
1096                 }
1097
1098                 bool smode = false;
1099                 std::string sourceserv;
1100
1101                 /* Are we dealing with an FMODE from a user, or from a server? */
1102                 userrec* who = this->Instance->FindNick(source);
1103                 if (who)
1104                 {
1105                         /* FMODE from a user, set sourceserv to the users server name */
1106                         sourceserv = who->server;
1107                 }
1108                 else
1109                 {
1110                         /* FMODE from a server, create a fake user to receive mode feedback */
1111                         who = new userrec(this->Instance);
1112                         who->SetFd(FD_MAGIC_NUMBER);
1113                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1114                         sourceserv = source;    /* Set sourceserv to the actual source string */
1115                 }
1116                 const char* modelist[64];
1117                 time_t TS = 0;
1118                 int n = 0;
1119                 memset(&modelist,0,sizeof(modelist));
1120                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1121                 {
1122                         if (q == 1)
1123                         {
1124                                 /* The timestamp is in this position.
1125                                  * We don't want to pass that up to the
1126                                  * server->client protocol!
1127                                  */
1128                                 TS = atoi(params[q].c_str());
1129                         }
1130                         else
1131                         {
1132                                 /* Everything else is fine to append to the modelist */
1133                                 modelist[n++] = params[q].c_str();
1134                         }
1135
1136                 }
1137                 /* Extract the TS value of the object, either userrec or chanrec */
1138                 userrec* dst = this->Instance->FindNick(params[0]);
1139                 chanrec* chan = NULL;
1140                 time_t ourTS = 0;
1141                 if (dst)
1142                 {
1143                         ourTS = dst->age;
1144                 }
1145                 else
1146                 {
1147                         chan = this->Instance->FindChan(params[0]);
1148                         if (chan)
1149                         {
1150                                 ourTS = chan->age;
1151                         }
1152                         else
1153                                 /* Oops, channel doesnt exist! */
1154                                 return true;
1155                 }
1156
1157                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1158                  * with parameters.
1159                  */
1160                 if (TS == ourTS)
1161                 {
1162                         Instance->Log(DEBUG,"Entering TS equality check");
1163                         ModeHandler* mh = NULL;
1164                         unsigned long paramptr = 3;
1165                         std::string to_bounce = "";
1166                         std::string to_keep = "";
1167                         std::vector<std::string> params_to_keep;
1168                         std::string params_to_bounce = "";
1169                         bool adding = true;
1170                         char cur_change = 1;
1171                         char old_change = 0;
1172                         char old_bounce_change = 0;
1173                         /* Merge modes, basically do special stuff to mode with params */
1174                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1175                         {
1176                                 switch (*x)
1177                                 {
1178                                         case '-':
1179                                                 adding = false;
1180                                         break;
1181                                         case '+':
1182                                                 adding = true;
1183                                         break;
1184                                         default:
1185                                                 if (adding)
1186                                                 {
1187                                                         /* We only care about whats being set,
1188                                                          * not whats being unset
1189                                                          */
1190                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1191
1192                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1193                                                         {
1194                                                                 /* We only want to do special things to
1195                                                                  * modes with parameters, we are going to rewrite
1196                                                                  * those parameters
1197                                                                  */
1198                                                                 ModePair ret;
1199                                                                 adding ? cur_change = '+' : cur_change = '-';
1200
1201                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1202
1203                                                                 /* The mode is set here, check which we should keep */
1204                                                                 if (ret.first)
1205                                                                 {
1206                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1207
1208                                                                         if (which_to_keep == true)
1209                                                                         {
1210                                                                                 /* Keep ours, bounce theirs:
1211                                                                                  * Send back ours to them and
1212                                                                                  * drop their mode changs
1213                                                                                  */
1214                                                                                 adding ? cur_change = '+' : cur_change = '-';
1215                                                                                 if (cur_change != old_bounce_change)
1216                                                                                         to_bounce += cur_change;
1217                                                                                 to_bounce += *x;
1218                                                                                 old_bounce_change = cur_change;
1219
1220                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1221                                                                                         params_to_bounce.append(" ").append(ret.second);
1222                                                                         }
1223                                                                         else
1224                                                                         {
1225                                                                                 /* Keep theirs: Accept their mode change,
1226                                                                                  * do nothing else
1227                                                                                  */
1228                                                                                 adding ? cur_change = '+' : cur_change = '-';
1229                                                                                 if (cur_change != old_change)
1230                                                                                         to_keep += cur_change;
1231                                                                                 to_keep += *x;
1232                                                                                 old_change = cur_change;
1233
1234                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1235                                                                                         params_to_keep.push_back(params[paramptr]);
1236                                                                         }
1237                                                                 }
1238                                                                 else
1239                                                                 {
1240                                                                         /* Mode isnt set here, we want it */
1241                                                                         adding ? cur_change = '+' : cur_change = '-';
1242                                                                         if (cur_change != old_change)
1243                                                                                 to_keep += cur_change;
1244                                                                         to_keep += *x;
1245                                                                         old_change = cur_change;
1246
1247                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1248                                                                                 params_to_keep.push_back(params[paramptr]);
1249                                                                 }
1250
1251                                                                 paramptr++;
1252                                                         }
1253                                                         else
1254                                                         {
1255                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1256
1257                                                                 if (mh)
1258                                                                 {
1259                                                                         adding ? cur_change = '+' : cur_change = '-';
1260
1261                                                                         /* Just keep this, safe to merge with no checks
1262                                                                          * it has no parameters
1263                                                                          */
1264
1265                                                                         if (cur_change != old_change)
1266                                                                                 to_keep += cur_change;
1267                                                                         to_keep += *x;
1268                                                                         old_change = cur_change;
1269
1270                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1271                                                                         {
1272                                                                                 Instance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1273                                                                                 params_to_keep.push_back(params[paramptr++]);
1274                                                                         }
1275                                                                 }
1276                                                         }
1277                                                 }
1278                                                 else
1279                                                 {
1280                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1281
1282                                                         if (mh)
1283                                                         {
1284                                                                 /* Taking a mode away */
1285                                                                 adding ? cur_change = '+' : cur_change = '-';
1286
1287                                                                 if (cur_change != old_change)
1288                                                                         to_keep += cur_change;
1289                                                                 to_keep += *x;
1290                                                                 old_change = cur_change;
1291
1292                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1293                                                                         params_to_keep.push_back(params[paramptr++]);
1294                                                         }
1295                                                 }
1296                                         break;
1297                                 }
1298                         }
1299
1300                         if (to_bounce.length())
1301                         {
1302                                 std::deque<std::string> newparams;
1303                                 newparams.push_back(params[0]);
1304                                 newparams.push_back(ConvToStr(ourTS));
1305                                 newparams.push_back(to_bounce+params_to_bounce);
1306                                 Instance->Log(DEBUG,"BOUNCE BACK: %s",(to_bounce+params_to_bounce).c_str());
1307                                 Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1308                         }
1309
1310                         if (to_keep.length())
1311                         {
1312                                 unsigned int n = 2;
1313                                 unsigned int q = 0;
1314                                 modelist[0] = params[0].c_str();
1315                                 modelist[1] = to_keep.c_str();
1316
1317                                 if (params_to_keep.size() > 0)
1318                                 {
1319                                         for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
1320                                         {
1321                                                 Instance->Log(DEBUG,"KEEP Item %d of %d: %s", q, params_to_keep.size(), params_to_keep[q].c_str());
1322                                                 modelist[n++] = params_to_keep[q].c_str();
1323                                         }
1324                                 }
1325
1326                                 if (smode)
1327                                 {
1328                                         Instance->Log(DEBUG,"Send mode");
1329                                         this->Instance->SendMode(modelist, n, who);
1330                                 }
1331                                 else
1332                                 {
1333                                         Instance->Log(DEBUG,"Send mode client");
1334                                         this->Instance->CallCommandHandler("MODE", modelist, n, who);
1335                                 }
1336
1337                                 /* HOT POTATO! PASS IT ON! */
1338                                 Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1339                         }
1340                 }
1341                 else
1342                 /* U-lined servers always win regardless of their TS */
1343                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1344                 {
1345                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1346                          * SHOULD accept it, if its clock is right.
1347                          *
1348                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1349                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1350                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1351                          *
1352                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1353                          * writing the code. It took me a while to come up with this solution.
1354                          *
1355                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1356                          */
1357
1358                         std::deque<std::string> newparams;      /* New parameter list we send back */
1359                         newparams.push_back(params[0]);         /* Target, user or channel */
1360                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1361                         newparams.push_back("");                /* This contains the mode string. For now
1362                                                                  * it's empty, we fill it below.
1363                                                                  */
1364
1365                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1366                          * set to avoid a desync here.
1367                          */
1368                         std::string modebounce = "";
1369                         bool adding = true;
1370                         unsigned int t = 3;
1371                         ModeHandler* mh = NULL;
1372                         char cur_change = 1;
1373                         char old_change = 0;
1374                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1375                         {
1376                                 /* Iterate over all mode chars in the sent set */
1377                                 switch (*x)
1378                                 {
1379                                         /* Adding or subtracting modes? */
1380                                         case '-':
1381                                                 adding = false;
1382                                         break;
1383                                         case '+':
1384                                                 adding = true;
1385                                         break;
1386                                         default:
1387                                                 /* Find the mode handler for this mode */
1388                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1389
1390                                                 /* Got a mode handler?
1391                                                  * This also prevents us bouncing modes we have no handler for.
1392                                                  */
1393                                                 if (mh)
1394                                                 {
1395                                                         ModePair ret;
1396                                                         std::string p = "";
1397
1398                                                         /* Does the mode require a parameter right now?
1399                                                          * If it does, fetch it if we can
1400                                                          */
1401                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1402                                                                 p = params[t++];
1403
1404                                                         /* Call the ModeSet method to determine if its set with the
1405                                                          * given parameter here or not.
1406                                                          */
1407                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1408
1409                                                         /* XXX: Really. Dont ask.
1410                                                          * Determine from if its set combined with what the current
1411                                                          * 'state' is (adding or not) as to wether we should 'invert'
1412                                                          * or 'reinforce' the mode change
1413                                                          */
1414                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1415
1416                                                         /* Quickly determine if we have 'flipped' from + to -,
1417                                                          * or - to +, to prevent unneccessary +/- chars in the
1418                                                          * output string that waste bandwidth
1419                                                          */
1420                                                         if (cur_change != old_change)
1421                                                                 modebounce += cur_change;
1422                                                         old_change = cur_change;
1423
1424                                                         /* Add the mode character to the output string */
1425                                                         modebounce += mh->GetModeChar();
1426
1427                                                         /* We got a parameter back from ModeHandler::ModeSet,
1428                                                          * are we supposed to be sending one out right now?
1429                                                          */
1430                                                         if (ret.second.length())
1431                                                         {
1432                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1433                                                                         /* Yes we're supposed to be sending out
1434                                                                          * the parameter. Make sure it goes
1435                                                                          */
1436                                                                         newparams.push_back(ret.second);
1437                                                         }
1438
1439                                                 }
1440                                         break;
1441                                 }
1442                         }
1443
1444                         /* Update the parameters for FMODE with the new 'bounced' string */
1445                         newparams[2] = modebounce;
1446                         /* Only send it back the way it came, no need to send it anywhere else */
1447                         Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1448                         Instance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1449                 }
1450                 else
1451                 {
1452                         Instance->Log(DEBUG,"Allow modes, TS lower for sender");
1453                         /* The server was ulined, but something iffy is up with the TS.
1454                          * Sound the alarm bells!
1455                          */
1456                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1457                         {
1458                                 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());
1459                         }
1460                         /* Allow the mode, route it to either server or user command handling */
1461                         if (smode)
1462                                 this->Instance->SendMode(modelist,n,who);
1463                         else
1464                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1465
1466                         /* HOT POTATO! PASS IT ON! */
1467                         Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1468                 }
1469                 /* Are we supposed to free the userrec? */
1470                 if (smode)
1471                         DELETE(who);
1472
1473                 return true;
1474         }
1475
1476         /** FTOPIC command */
1477         bool ForceTopic(const std::string &source, std::deque<std::string> &params)
1478         {
1479                 if (params.size() != 4)
1480                         return true;
1481                 time_t ts = atoi(params[1].c_str());
1482                 std::string nsource = source;
1483
1484                 chanrec* c = this->Instance->FindChan(params[0]);
1485                 if (c)
1486                 {
1487                         if ((ts >= c->topicset) || (!*c->topic))
1488                         {
1489                                 std::string oldtopic = c->topic;
1490                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1491                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1492                                 c->topicset = ts;
1493                                 /* if the topic text is the same as the current topic,
1494                                  * dont bother to send the TOPIC command out, just silently
1495                                  * update the set time and set nick.
1496                                  */
1497                                 if (oldtopic != params[3])
1498                                 {
1499                                         userrec* user = this->Instance->FindNick(source);
1500                                         if (!user)
1501                                         {
1502                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1503                                         }
1504                                         else
1505                                         {
1506                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1507                                                 nsource = user->server;
1508                                         }
1509                                         /* all done, send it on its way */
1510                                         params[3] = ":" + params[3];
1511                                         Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
1512                                 }
1513                         }
1514
1515                 }
1516
1517                 return true;
1518         }
1519
1520         /** FJOIN, similar to TS6 SJOIN, but not quite. */
1521         bool ForceJoin(const std::string &source, std::deque<std::string> &params)
1522         {
1523                 /* 1.1 FJOIN works as follows:
1524                  *
1525                  * Each FJOIN is sent along with a timestamp, and the side with the lowest
1526                  * timestamp 'wins'. From this point on we will refer to this side as the
1527                  * winner. The side with the higher timestamp loses, from this point on we
1528                  * will call this side the loser or losing side. This should be familiar to
1529                  * anyone who's dealt with dreamforge or TS6 before.
1530                  *
1531                  * When two sides of a split heal and this occurs, the following things
1532                  * will happen:
1533                  *
1534                  * If the timestamps are exactly equal, both sides merge their privilages
1535                  * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
1536                  * re-created during a split, this is safe to do.
1537                  *
1538                  *
1539                  * If the timestamps are NOT equal, the losing side removes all privilage
1540                  * modes from all of its users that currently exist in the channel, before
1541                  * introducing new users into the channel which are listed in the FJOIN
1542                  * command's parameters. This means, all modes +ohv, and privilages added
1543                  * by modules, such as +qa. The losing side then LOWERS its timestamp value
1544                  * of the channel to match that of the winning side, and the modes of the
1545                  * users of the winning side are merged in with the losing side. The loser
1546                  * then sends out a set of FMODE commands which 'confirm' that it just
1547                  * removed all privilage modes from its existing users, which allows for
1548                  * services packages to still work correctly without needing to know the
1549                  * timestamping rules which InspIRCd follows. In TS6 servers this is always
1550                  * a problem, and services packages must contain code which explicitly
1551                  * behaves as TS6 does, removing ops from the losing side of a split where
1552                  * neccessary within its internal records, as this state information is
1553                  * not explicitly echoed out in that protocol.
1554                  *
1555                  * The winning side on the other hand will ignore all user modes from the
1556                  * losing side, so only its own modes get applied. Life is simple for those
1557                  * who succeed at internets. :-)
1558                  *
1559                  * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
1560                  * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
1561                  * you ask? Well, quite simply because we don't need to. They'll be sent
1562                  * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
1563                  * the losing side sends any modes for the channel which shouldnt win,
1564                  * they wont as their timestamp will be too high :-)
1565                  */
1566
1567                 if (params.size() < 3)
1568                         return true;
1569
1570                 char first[MAXBUF];             /* The first parameter of the mode command */
1571                 char modestring[MAXBUF];        /* The mode sequence (2nd parameter) of the mode command */
1572                 char* mode_users[127];          /* The values used by the mode command */
1573                 memset(&mode_users,0,sizeof(mode_users));       /* Initialize mode parameters */
1574                 mode_users[0] = first;          /* Set this up to be our on-stack value */
1575                 mode_users[1] = modestring;     /* Same here as above */
1576                 strcpy(modestring,"+");         /* Initialize the mode sequence to just '+' */
1577                 unsigned int modectr = 2;       /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */
1578
1579                 userrec* who = NULL;                    /* User we are currently checking */
1580                 std::string channel = params[0];        /* Channel name, as a string */
1581                 time_t TS = atoi(params[1].c_str());    /* Timestamp given to us for remote side */
1582
1583                 /* Try and find the channel */
1584                 chanrec* chan = this->Instance->FindChan(channel);
1585
1586                 /* Initialize channel name in the mode parameters */
1587                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1588
1589                 /* default TS is a high value, which if we dont have this
1590                  * channel will let the other side apply their modes.
1591                  */
1592                 time_t ourTS = time(NULL)+600;
1593
1594                 /* Does this channel exist? if it does, get its REAL timestamp */
1595                 if (chan)
1596                         ourTS = chan->age;
1597
1598                 /* In 1.1, if they have the newer channel, we immediately clear
1599                  * all status modes from our users. We then accept their modes.
1600                  * If WE have the newer channel its the other side's job to do this.
1601                  * Note that this causes the losing server to send out confirming
1602                  * FMODE lines.
1603                  */
1604                 if (ourTS > TS)
1605                 {
1606                         std::deque<std::string> param_list;
1607
1608                         if (chan)
1609                                 chan->age = TS;
1610
1611                         /* Lower the TS here */
1612                         if (Utils->AnnounceTSChange && chan)
1613                                 chan->WriteChannelWithServ(Instance->Config->ServerName,
1614                                 "TS for %s changed from %lu to %lu", chan->name, ourTS, TS);
1615                         ourTS = TS;
1616
1617                         param_list.push_back(channel);
1618                         /* Zap all the privilage modes on our side */
1619                         this->RemoveStatus(Instance->Config->ServerName, param_list);
1620                 }
1621
1622                 /* Put the final parameter of the FJOIN into a tokenstream ready to split it */
1623                 irc::tokenstream users(params[2]);
1624                 std::string item = "*";
1625
1626                 /* do this first, so our mode reversals are correctly received by other servers
1627                  * if there is a TS collision.
1628                  */
1629                 params[2] = ":" + params[2];
1630                 Utils->DoOneToAllButSender(source,"FJOIN",params,source);
1631
1632                 /* Now, process every 'prefixes,nick' pair */
1633                 while (item != "")
1634                 {
1635                         /* Find next user */
1636                         item = users.GetToken();
1637
1638                         const char* usr = item.c_str();
1639
1640                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1641                          * (is this even possible?) */
1642                         if (usr && *usr)
1643                         {
1644                                 const char* permissions = usr;
1645                                 int ntimes = 0;
1646                                 char* nm = new char[MAXBUF];
1647                                 char* tnm = nm;
1648
1649                                 /* Iterate through all the prefix values, convert them from prefixes
1650                                  * to mode letters, and append them to the mode sequence
1651                                  */
1652                                 while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
1653                                 {
1654                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1655                                         if (mh)
1656                                         {
1657                                                 /* This is a valid prefix */
1658                                                 ntimes++;
1659                                                 *tnm++ = mh->GetModeChar();
1660                                         }
1661                                         else
1662                                         {
1663                                                 /* Not a valid prefix...
1664                                                  * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
1665                                                  */
1666                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
1667                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
1668                                                 return false;
1669                                         }
1670                                         usr++;
1671                                         permissions++;
1672                                 }
1673
1674                                 /* Null terminate modes */
1675                                 *tnm = 0;
1676                                 /* Advance past the comma, to the nick */
1677                                 usr++;
1678
1679                                 /* Check the user actually exists */
1680                                 who = this->Instance->FindNick(usr);
1681                                 if (who)
1682                                 {
1683                                         /* Did they get any modes? How many times? */
1684                                         strlcat(modestring, nm, MAXBUF);
1685                                         for (int k = 0; k < ntimes; k++)
1686                                                 mode_users[modectr++] = strdup(usr);
1687
1688                                         /* Free temporary buffer used for mode sequence */
1689                                         delete[] nm;
1690
1691                                         /* Check that the user's 'direction' is correct
1692                                          * based on the server sending the FJOIN. We must
1693                                          * check each nickname in turn, because the origin of
1694                                          * the FJOIN may be different to the origin of the nicks
1695                                          * in the command itself.
1696                                          */
1697                                         TreeServer* route_back_again = Utils->BestRouteTo(who->server);
1698                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
1699                                         {
1700                                                 /* Oh dear oh dear. */
1701                                                 Instance->Log(DEBUG,"Fake direction in FJOIN, user '%s'",who->nick);
1702                                                 continue;
1703                                         }
1704                                         /* Finally, we can actually place the user into the channel.
1705                                          * We're sure its right. Final answer, phone a friend.
1706                                          */
1707                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
1708
1709                                         /* Have we already queued up MAXMODES modes with parameters
1710                                          * (+qaohv) ready to be sent to the server?
1711                                          */
1712                                         if (modectr >= (MAXMODES-1))
1713                                         {
1714                                                 /* Only actually give the users any status if we lost
1715                                                  * the FJOIN or drew (equal timestamps).
1716                                                  * It isn't actually possible for ourTS to be > TS here,
1717                                                  * only possible to actually have ourTS == TS, or
1718                                                  * ourTS < TS, because if we lost, we already lowered
1719                                                  * our TS above before we entered this loop. We only
1720                                                  * check >= as a safety measure, in case someone stuffed
1721                                                  * up. If someone DID stuff up, it was most likely me.
1722                                                  * Note: I do not like baseball bats in the face...
1723                                                  */
1724                                                 if (ourTS >= TS)
1725                                                 {
1726                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1727                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1728
1729                                                         /* Something stuffed up, and for some reason, the timestamp is
1730                                                          * NOT lowered right now and should be. Lower it. Usually this
1731                                                          * code won't be executed, doubtless someone will remove it some
1732                                                          * day soon.
1733                                                          */
1734                                                         if (ourTS > TS)
1735                                                         {
1736                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1737                                                                 chan->age = TS;
1738                                                                 ourTS = TS;
1739                                                         }
1740                                                 }
1741
1742                                                 /* Reset all this back to defaults, and
1743                                                  * free any ram we have left allocated.
1744                                                  */
1745                                                 strcpy(mode_users[1],"+");
1746                                                 for (unsigned int f = 2; f < modectr; f++)
1747                                                         free(mode_users[f]);
1748                                                 modectr = 2;
1749                                         }
1750                                 }
1751                                 else
1752                                 {
1753                                         /* Remember to free this */
1754                                         delete[] nm;
1755                                         /* If we got here, there's a nick in FJOIN which doesnt exist on this server.
1756                                          * We don't try to process the nickname here (that WOULD cause a segfault because
1757                                          * we'd be playing with null pointers) however, we DO pass the nickname on, just
1758                                          * in case somehow we're desynched, so that other users which might be able to see
1759                                          * the nickname get their fair chance to process it.
1760                                          */
1761                                         Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
1762                                         continue;
1763                                 }
1764                         }
1765                 }
1766
1767                 /* there werent enough modes built up to flush it during FJOIN,
1768                  * or, there are a number left over. flush them out.
1769                  */
1770                 if ((modectr > 2) && (who) && (chan))
1771                 {
1772                         if (ourTS >= TS)
1773                         {
1774                                 /* Our channel is newer than theirs. Evil deeds must be afoot. */
1775                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1776                                 /* Yet again, we can't actually get a true value here, if everything else
1777                                  * is working as it should.
1778                                  */
1779                                 if (ourTS > TS)
1780                                 {
1781                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1782                                         chan->age = TS;
1783                                         ourTS = TS;
1784                                 }
1785                         }
1786
1787                         /* Free anything we have left to free */
1788                         for (unsigned int f = 2; f < modectr; f++)
1789                                 free(mode_users[f]);
1790                 }
1791
1792                 /* All done. That wasnt so bad was it, you can wipe
1793                  * the sweat from your forehead now. :-)
1794                  */
1795                 return true;
1796         }
1797
1798         /** NICK command */
1799         bool IntroduceClient(const std::string &source, std::deque<std::string> &params)
1800         {
1801                 if (params.size() < 8)
1802                         return true;
1803                 if (params.size() > 8)
1804                 {
1805                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1806                         return true;
1807                 }
1808                 // NICK age nick host dhost ident +modes ip :gecos
1809                 //       0    1   2     3     4      5   6     7
1810                 time_t age = atoi(params[0].c_str());
1811
1812                 /* This used to have a pretty craq'y loop doing the same thing,
1813                  * now we just let the STL do the hard work (more efficiently)
1814                  */
1815                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1816                 if (pos_after_plus != std::string::npos)
1817                         params[5] = params[5].substr(pos_after_plus);
1818
1819                 const char* tempnick = params[1].c_str();
1820                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1821
1822                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1823
1824                 if (iter != this->Instance->clientlist.end())
1825                 {
1826                         // nick collision
1827                         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);
1828                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1829                         userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
1830                         return true;
1831                 }
1832
1833                 userrec* _new = new userrec(this->Instance);
1834                 this->Instance->clientlist[tempnick] = _new;
1835                 _new->SetFd(FD_MAGIC_NUMBER);
1836                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1837                 strlcpy(_new->host, params[2].c_str(),63);
1838                 strlcpy(_new->dhost, params[3].c_str(),63);
1839                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1840                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1841                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1842                 _new->registered = REG_ALL;
1843                 _new->signon = age;
1844
1845                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1846                         _new->modes[(*v)-65] = 1;
1847
1848 #ifdef SUPPORT_IP6LINKS
1849                 if (params[6].find_first_of(":") != std::string::npos)
1850                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1851                 else
1852 #endif
1853                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1854
1855                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1856
1857                 params[7] = ":" + params[7];
1858                 Utils->DoOneToAllButSender(source,"NICK",params,source);
1859
1860                 // Increment the Source Servers User Count..
1861                 TreeServer* SourceServer = Utils->FindServer(source);
1862                 if (SourceServer)
1863                 {
1864                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1865                         SourceServer->AddUserCount();
1866                 }
1867
1868                 FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
1869
1870                 return true;
1871         }
1872
1873         /** Send one or more FJOINs for a channel of users.
1874          * If the length of a single line is more than 480-NICKMAX
1875          * in length, it is split over multiple lines.
1876          */
1877         void SendFJoins(TreeServer* Current, chanrec* c)
1878         {
1879                 std::string buffer;
1880
1881                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1882                 char list[MAXBUF];
1883                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1884
1885                 size_t dlen, curlen;
1886                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1887                 int numusers = 0;
1888                 char* ptr = list + dlen;
1889
1890                 CUList *ulist = c->GetUsers();
1891                 std::string modes = "";
1892                 std::string params = "";
1893
1894                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1895                 {
1896                         // The first parameter gets a : before it
1897                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1898
1899                         curlen += ptrlen;
1900                         ptr += ptrlen;
1901
1902                         numusers++;
1903
1904                         if (curlen > (480-NICKMAX))
1905                         {
1906                                 buffer.append(list).append("\r\n");
1907
1908                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1909                                 ptr = list + dlen;
1910                                 ptrlen = 0;
1911                                 numusers = 0;
1912                         }
1913                 }
1914
1915                 if (numusers)
1916                         buffer.append(list).append("\r\n");
1917
1918                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1919                 {
1920                         modes.append("b");
1921                         params.append(" ").append(b->data);
1922
1923                         if (params.length() >= MAXMODES)
1924                         {
1925                                 /* Wrap at MAXMODES */
1926                                 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params).append("\r\n");
1927                                 modes = "";
1928                                 params = "";
1929                         }
1930                 }
1931
1932                 buffer.append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(c->ChanModes(true));
1933
1934                 /* Only send these if there are any */
1935                 if (!modes.empty())
1936                         buffer.append("\r\n").append(":").append(this->Instance->Config->ServerName).append(" FMODE ").append(c->name).append(" ").append(ConvToStr(c->age)).append(" +").append(modes).append(params);
1937
1938                 this->WriteLine(buffer);
1939         }
1940
1941         /** Send G, Q, Z and E lines */
1942         void SendXLines(TreeServer* Current)
1943         {
1944                 char data[MAXBUF];
1945                 std::string buffer;
1946                 std::string n = this->Instance->Config->ServerName;
1947                 const char* sn = n.c_str();
1948                 int iterations = 0;
1949                 /* Yes, these arent too nice looking, but they get the job done */
1950                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1951                 {
1952                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\r\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1953                         buffer.append(data);
1954                 }
1955                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1956                 {
1957                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\r\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1958                         buffer.append(data);
1959                 }
1960                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1961                 {
1962                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s\r\n",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1963                         buffer.append(data);
1964                 }
1965                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1966                 {
1967                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s\r\n",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1968                         buffer.append(data);
1969                 }
1970                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1971                 {
1972                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s\r\n",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1973                         buffer.append(data);
1974                 }
1975                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1976                 {
1977                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s\r\n",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1978                         buffer.append(data);
1979                 }
1980                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1981                 {
1982                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s\r\n",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1983                         buffer.append(data);
1984                 }
1985                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1986                 {
1987                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s\r\n",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1988                         buffer.append(data);
1989                 }
1990
1991                 if (!buffer.empty())
1992                         this->WriteLine(buffer);
1993         }
1994
1995         /** Send channel modes and topics */
1996         void SendChannelModes(TreeServer* Current)
1997         {
1998                 char data[MAXBUF];
1999                 std::deque<std::string> list;
2000                 int iterations = 0;
2001                 std::string n = this->Instance->Config->ServerName;
2002                 const char* sn = n.c_str();
2003                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
2004                 {
2005                         SendFJoins(Current, c->second);
2006                         if (*c->second->topic)
2007                         {
2008                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
2009                                 this->WriteLine(data);
2010                         }
2011                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
2012                         list.clear();
2013                         c->second->GetExtList(list);
2014                         for (unsigned int j = 0; j < list.size(); j++)
2015                         {
2016                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
2017                         }
2018                 }
2019         }
2020
2021         /** send all users and their oper state/modes */
2022         void SendUsers(TreeServer* Current)
2023         {
2024                 char data[MAXBUF];
2025                 std::deque<std::string> list;
2026                 std::string dataline;
2027                 int iterations = 0;
2028                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
2029                 {
2030                         if (u->second->registered == REG_ALL)
2031                         {
2032                                 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);
2033                                 this->WriteLine(data);
2034                                 if (*u->second->oper)
2035                                 {
2036                                         snprintf(data,MAXBUF,":%s OPERTYPE %s", u->second->nick, u->second->oper);
2037                                         this->WriteLine(data);
2038                                 }
2039                                 if (*u->second->awaymsg)
2040                                 {
2041                                         snprintf(data,MAXBUF,":%s AWAY :%s", u->second->nick, u->second->awaymsg);
2042                                         this->WriteLine(data);
2043                                 }
2044                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
2045                                 list.clear();
2046                                 u->second->GetExtList(list);
2047                                 for (unsigned int j = 0; j < list.size(); j++)
2048                                 {
2049                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
2050                                 }
2051                         }
2052                 }
2053         }
2054
2055         /** This function is called when we want to send a netburst to a local
2056          * server. There is a set order we must do this, because for example
2057          * users require their servers to exist, and channels require their
2058          * users to exist. You get the idea.
2059          */
2060         void DoBurst(TreeServer* s)
2061         {
2062                 std::string burst = "BURST "+ConvToStr(time(NULL));
2063                 std::string endburst = "ENDBURST";
2064                 // Because by the end of the netburst, it  could be gone!
2065                 std::string name = s->GetName();
2066                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
2067                 this->WriteLine(burst);
2068                 /* send our version string */
2069                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
2070                 /* Send server tree */
2071                 this->SendServers(Utils->TreeRoot,s,1);
2072                 /* Send users and their oper status */
2073                 this->SendUsers(s);
2074                 /* Send everything else (channel modes, xlines etc) */
2075                 this->SendChannelModes(s);
2076                 this->SendXLines(s);
2077                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
2078                 this->WriteLine(endburst);
2079                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
2080         }
2081
2082         /** This function is called when we receive data from a remote
2083          * server. We buffer the data in a std::string (it doesnt stay
2084          * there for long), reading using InspSocket::Read() which can
2085          * read up to 16 kilobytes in one operation.
2086          *
2087          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
2088          * THE SOCKET OBJECT FOR US.
2089          */
2090         virtual bool OnDataReady()
2091         {
2092                 char* data = this->Read();
2093                 /* Check that the data read is a valid pointer and it has some content */
2094                 if (data && *data)
2095                 {
2096                         this->in_buffer.append(data);
2097                         /* While there is at least one new line in the buffer,
2098                          * do something useful (we hope!) with it.
2099                          */
2100                         while (in_buffer.find("\n") != std::string::npos)
2101                         {
2102                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
2103                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
2104                                 /* Use rfind here not find, as theres more
2105                                  * chance of the \r being near the end of the
2106                                  * string, not the start.
2107                                  */
2108                                 if (ret.find("\r") != std::string::npos)
2109                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
2110                                 /* Process this one, abort if it
2111                                  * didnt return true.
2112                                  */
2113                                 if (this->ctx_in)
2114                                 {
2115                                         char out[1024];
2116                                         char result[1024];
2117                                         memset(result,0,1024);
2118                                         memset(out,0,1024);
2119                                         /* ERROR + CAPAB is still allowed unencryped */
2120                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
2121                                         {
2122                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
2123                                                 if ((nbytes > 0) && (nbytes < 1024))
2124                                                 {
2125                                                         ctx_in->Decrypt(out, result, nbytes, 0);
2126                                                         for (int t = 0; t < nbytes; t++)
2127                                                         {
2128                                                                 if (result[t] == '\7')
2129                                                                 {
2130                                                                         /* We only need to stick a \0 on the
2131                                                                          * first \7, the rest will be lost
2132                                                                          */
2133                                                                         result[t] = 0;
2134                                                                         break;
2135                                                                 }
2136                                                         }
2137                                                         ret = result;
2138                                                 }
2139                                         }
2140                                 }
2141                                 if (!this->ProcessLine(ret))
2142                                 {
2143                                         return false;
2144                                 }
2145                         }
2146                         return true;
2147                 }
2148                 /* EAGAIN returns an empty but non-NULL string, so this
2149                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2150                  */
2151                 return (data && !*data);
2152         }
2153
2154         int WriteLine(std::string line)
2155         {
2156                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2157                 if (this->ctx_out)
2158                 {
2159                         char result[10240];
2160                         char result64[10240];
2161                         if (this->keylength)
2162                         {
2163                                 // pad it to the key length
2164                                 int n = this->keylength - (line.length() % this->keylength);
2165                                 if (n)
2166                                         line.append(n,'\7');
2167                         }
2168                         unsigned int ll = line.length();
2169                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2170                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2171                         line = result64;
2172                 }
2173                 line.append("\r\n");
2174                 return this->Write(line);
2175         }
2176
2177         /* Handle ERROR command */
2178         bool Error(std::deque<std::string> &params)
2179         {
2180                 if (params.size() < 1)
2181                         return false;
2182                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2183                 /* we will return false to cause the socket to close. */
2184                 return false;
2185         }
2186
2187         /** remote MOTD. leet, huh? */
2188         bool Motd(const std::string &prefix, std::deque<std::string> &params)
2189         {
2190                 if (params.size() > 0)
2191                 {
2192                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2193                         {
2194                                 /* It's for our server */
2195                                 string_list results;
2196                                 userrec* source = this->Instance->FindNick(prefix);
2197
2198                                 if (source)
2199                                 {
2200                                         std::deque<std::string> par;
2201                                         par.push_back(prefix);
2202                                         par.push_back("");
2203
2204                                         if (!Instance->Config->MOTD.size())
2205                                         {
2206                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2207                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2208                                                 return true;
2209                                         }
2210
2211                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2212                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2213
2214                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2215                                         {
2216                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2217                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2218                                         }
2219
2220                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2221                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2222                                 }
2223                         }
2224                         else
2225                         {
2226                                 /* Pass it on */
2227                                 userrec* source = this->Instance->FindNick(prefix);
2228                                 if (source)
2229                                         Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
2230                         }
2231                 }
2232                 return true;
2233         }
2234
2235         /** remote ADMIN. leet, huh? */
2236         bool Admin(const std::string &prefix, std::deque<std::string> &params)
2237         {
2238                 if (params.size() > 0)
2239                 {
2240                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2241                         {
2242                                 /* It's for our server */
2243                                 string_list results;
2244                                 userrec* source = this->Instance->FindNick(prefix);
2245
2246                                 if (source)
2247                                 {
2248                                         std::deque<std::string> par;
2249                                         par.push_back(prefix);
2250                                         par.push_back("");
2251
2252                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2253                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2254
2255                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2256                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2257
2258                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2259                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2260
2261                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2262                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2263                                 }
2264                         }
2265                         else
2266                         {
2267                                 /* Pass it on */
2268                                 userrec* source = this->Instance->FindNick(prefix);
2269                                 if (source)
2270                                         Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
2271                         }
2272                 }
2273                 return true;
2274         }
2275
2276         bool Stats(const std::string &prefix, std::deque<std::string> &params)
2277         {
2278                 /* Get the reply to a STATS query if it matches this servername,
2279                  * and send it back as a load of PUSH queries
2280                  */
2281                 if (params.size() > 1)
2282                 {
2283                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2284                         {
2285                                 /* It's for our server */
2286                                 string_list results;
2287                                 userrec* source = this->Instance->FindNick(prefix);
2288                                 if (source)
2289                                 {
2290                                         std::deque<std::string> par;
2291                                         par.push_back(prefix);
2292                                         par.push_back("");
2293                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2294                                         for (size_t i = 0; i < results.size(); i++)
2295                                         {
2296                                                 par[1] = "::" + results[i];
2297                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2298                                         }
2299                                 }
2300                         }
2301                         else
2302                         {
2303                                 /* Pass it on */
2304                                 userrec* source = this->Instance->FindNick(prefix);
2305                                 if (source)
2306                                         Utils->DoOneToOne(prefix, "STATS", params, params[1]);
2307                         }
2308                 }
2309                 return true;
2310         }
2311
2312
2313         /** Because the core won't let users or even SERVERS set +o,
2314          * we use the OPERTYPE command to do this.
2315          */
2316         bool OperType(const std::string &prefix, std::deque<std::string> &params)
2317         {
2318                 if (params.size() != 1)
2319                 {
2320                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2321                         return true;
2322                 }
2323                 std::string opertype = params[0];
2324                 userrec* u = this->Instance->FindNick(prefix);
2325                 if (u)
2326                 {
2327                         u->modes[UM_OPERATOR] = 1;
2328                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2329                         Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2330                 }
2331                 return true;
2332         }
2333
2334         /** Because Andy insists that services-compatible servers must
2335          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2336          */
2337         bool ForceNick(const std::string &prefix, std::deque<std::string> &params)
2338         {
2339                 if (params.size() < 3)
2340                         return true;
2341
2342                 userrec* u = this->Instance->FindNick(params[0]);
2343
2344                 if (u)
2345                 {
2346                         Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2347                         if (IS_LOCAL(u))
2348                         {
2349                                 std::deque<std::string> par;
2350                                 par.push_back(params[1]);
2351                                 /* This is not required as one is sent in OnUserPostNick below
2352                                  */
2353                                 //Utils->DoOneToMany(u->nick,"NICK",par);
2354                                 if (!u->ForceNickChange(params[1].c_str()))
2355                                 {
2356                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2357                                         return true;
2358                                 }
2359                                 u->age = atoi(params[2].c_str());
2360                         }
2361                 }
2362                 return true;
2363         }
2364
2365         bool ServiceJoin(const std::string &prefix, std::deque<std::string> &params)
2366         {
2367                 if (params.size() < 2)
2368                         return true;
2369
2370                 userrec* u = this->Instance->FindNick(params[0]);
2371
2372                 if (u)
2373                 {
2374                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2375                         Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2376                 }
2377                 return true;
2378         }
2379
2380         bool RemoteRehash(const std::string &prefix, std::deque<std::string> &params)
2381         {
2382                 if (params.size() < 1)
2383                         return false;
2384
2385                 std::string servermask = params[0];
2386
2387                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2388                 {
2389                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2390                         this->Instance->RehashServer();
2391                         Utils->ReadConfiguration(false);
2392                         InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
2393                 }
2394                 Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
2395                 return true;
2396         }
2397
2398         bool RemoteKill(const std::string &prefix, std::deque<std::string> &params)
2399         {
2400                 if (params.size() != 2)
2401                         return true;
2402
2403                 std::string nick = params[0];
2404                 userrec* u = this->Instance->FindNick(prefix);
2405                 userrec* who = this->Instance->FindNick(nick);
2406
2407                 if (who)
2408                 {
2409                         /* Prepend kill source, if we don't have one */
2410                         std::string sourceserv = prefix;
2411                         if (u)
2412                         {
2413                                 sourceserv = u->server;
2414                         }
2415                         if (*(params[1].c_str()) != '[')
2416                         {
2417                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2418                         }
2419                         std::string reason = params[1];
2420                         params[1] = ":" + params[1];
2421                         Utils->DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2422                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2423                         userrec::QuitUser(this->Instance,who,reason);
2424                 }
2425                 return true;
2426         }
2427
2428         bool LocalPong(const std::string &prefix, std::deque<std::string> &params)
2429         {
2430                 if (params.size() < 1)
2431                         return true;
2432
2433                 if (params.size() == 1)
2434                 {
2435                         TreeServer* ServerSource = Utils->FindServer(prefix);
2436                         if (ServerSource)
2437                         {
2438                                 ServerSource->SetPingFlag();
2439                         }
2440                 }
2441                 else
2442                 {
2443                         std::string forwardto = params[1];
2444                         if (forwardto == this->Instance->Config->ServerName)
2445                         {
2446                                 /*
2447                                  * this is a PONG for us
2448                                  * if the prefix is a user, check theyre local, and if they are,
2449                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2450                                  * Services might want to send these s->s, but we dont need to yet.
2451                                  */
2452                                 userrec* u = this->Instance->FindNick(prefix);
2453
2454                                 if (u)
2455                                 {
2456                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2457                                 }
2458                         }
2459                         else
2460                         {
2461                                 // not for us, pass it on :)
2462                                 Utils->DoOneToOne(prefix,"PONG",params,forwardto);
2463                         }
2464                 }
2465
2466                 return true;
2467         }
2468
2469         bool MetaData(const std::string &prefix, std::deque<std::string> &params)
2470         {
2471                 if (params.size() < 3)
2472                         return true;
2473
2474                 TreeServer* ServerSource = Utils->FindServer(prefix);
2475
2476                 if (ServerSource)
2477                 {
2478                         if (params[0] == "*")
2479                         {
2480                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2481                         }
2482                         else if (*(params[0].c_str()) == '#')
2483                         {
2484                                 chanrec* c = this->Instance->FindChan(params[0]);
2485                                 if (c)
2486                                 {
2487                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2488                                 }
2489                         }
2490                         else if (*(params[0].c_str()) != '#')
2491                         {
2492                                 userrec* u = this->Instance->FindNick(params[0]);
2493                                 if (u)
2494                                 {
2495                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2496                                 }
2497                         }
2498                 }
2499
2500                 params[2] = ":" + params[2];
2501                 Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
2502                 return true;
2503         }
2504
2505         bool ServerVersion(const std::string &prefix, std::deque<std::string> &params)
2506         {
2507                 if (params.size() < 1)
2508                         return true;
2509
2510                 TreeServer* ServerSource = Utils->FindServer(prefix);
2511
2512                 if (ServerSource)
2513                 {
2514                         ServerSource->SetVersion(params[0]);
2515                 }
2516                 params[0] = ":" + params[0];
2517                 Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
2518                 return true;
2519         }
2520
2521         bool ChangeHost(const std::string &prefix, std::deque<std::string> &params)
2522         {
2523                 if (params.size() < 1)
2524                         return true;
2525
2526                 userrec* u = this->Instance->FindNick(prefix);
2527
2528                 if (u)
2529                 {
2530                         u->ChangeDisplayedHost(params[0].c_str());
2531                         Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
2532                 }
2533                 return true;
2534         }
2535
2536         bool AddLine(const std::string &prefix, std::deque<std::string> &params)
2537         {
2538                 if (params.size() < 6)
2539                         return true;
2540
2541                 bool propogate = false;
2542
2543                 switch (*(params[0].c_str()))
2544                 {
2545                         case 'Z':
2546                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2547                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2548                         break;
2549                         case 'Q':
2550                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2551                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2552                         break;
2553                         case 'E':
2554                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2555                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2556                         break;
2557                         case 'G':
2558                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2559                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2560                         break;
2561                         case 'K':
2562                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2563                         break;
2564                         default:
2565                                 /* Just in case... */
2566                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2567                                 propogate = false;
2568                         break;
2569                 }
2570
2571                 /* Send it on its way */
2572                 if (propogate)
2573                 {
2574                         if (atoi(params[4].c_str()))
2575                         {
2576                                 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());
2577                         }
2578                         else
2579                         {
2580                                 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());
2581                         }
2582                         params[5] = ":" + params[5];
2583                         Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2584                 }
2585                 if (!this->bursting)
2586                 {
2587                         Instance->Log(DEBUG,"Applying lines...");
2588                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2589                 }
2590                 return true;
2591         }
2592
2593         bool ChangeName(const std::string &prefix, std::deque<std::string> &params)
2594         {
2595                 if (params.size() < 1)
2596                         return true;
2597
2598                 userrec* u = this->Instance->FindNick(prefix);
2599
2600                 if (u)
2601                 {
2602                         u->ChangeName(params[0].c_str());
2603                         params[0] = ":" + params[0];
2604                         Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
2605                 }
2606                 return true;
2607         }
2608
2609         bool Whois(const std::string &prefix, std::deque<std::string> &params)
2610         {
2611                 if (params.size() < 1)
2612                         return true;
2613
2614                 Instance->Log(DEBUG,"In IDLE command");
2615                 userrec* u = this->Instance->FindNick(prefix);
2616
2617                 if (u)
2618                 {
2619                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2620                         // an incoming request
2621                         if (params.size() == 1)
2622                         {
2623                                 userrec* x = this->Instance->FindNick(params[0]);
2624                                 if ((x) && (IS_LOCAL(x)))
2625                                 {
2626                                         userrec* x = this->Instance->FindNick(params[0]);
2627                                         char signon[MAXBUF];
2628                                         char idle[MAXBUF];
2629
2630                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2631                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2632                                         std::deque<std::string> par;
2633                                         par.push_back(prefix);
2634                                         par.push_back(signon);
2635                                         par.push_back(idle);
2636                                         // ours, we're done, pass it BACK
2637                                         Utils->DoOneToOne(params[0],"IDLE",par,u->server);
2638                                 }
2639                                 else
2640                                 {
2641                                         // not ours pass it on
2642                                         Utils->DoOneToOne(prefix,"IDLE",params,x->server);
2643                                 }
2644                         }
2645                         else if (params.size() == 3)
2646                         {
2647                                 std::string who_did_the_whois = params[0];
2648                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2649                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2650                                 {
2651                                         // an incoming reply to a whois we sent out
2652                                         std::string nick_whoised = prefix;
2653                                         unsigned long signon = atoi(params[1].c_str());
2654                                         unsigned long idle = atoi(params[2].c_str());
2655                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2656                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2657                                 }
2658                                 else
2659                                 {
2660                                         // not ours, pass it on
2661                                         Utils->DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2662                                 }
2663                         }
2664                 }
2665                 return true;
2666         }
2667
2668         bool Push(const std::string &prefix, std::deque<std::string> &params)
2669         {
2670                 if (params.size() < 2)
2671                         return true;
2672
2673                 userrec* u = this->Instance->FindNick(params[0]);
2674
2675                 if (!u)
2676                         return true;
2677
2678                 if (IS_LOCAL(u))
2679                 {
2680                         u->Write(params[1]);
2681                 }
2682                 else
2683                 {
2684                         // continue the raw onwards
2685                         params[1] = ":" + params[1];
2686                         Utils->DoOneToOne(prefix,"PUSH",params,u->server);
2687                 }
2688                 return true;
2689         }
2690
2691         bool Time(const std::string &prefix, std::deque<std::string> &params)
2692         {
2693                 // :source.server TIME remote.server sendernick
2694                 // :remote.server TIME source.server sendernick TS
2695                 if (params.size() == 2)
2696                 {
2697                         // someone querying our time?
2698                         if (this->Instance->Config->ServerName == params[0])
2699                         {
2700                                 userrec* u = this->Instance->FindNick(params[1]);
2701                                 if (u)
2702                                 {
2703                                         char curtime[256];
2704                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2705                                         params.push_back(curtime);
2706                                         params[0] = prefix;
2707                                         Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2708                                 }
2709                         }
2710                         else
2711                         {
2712                                 // not us, pass it on
2713                                 userrec* u = this->Instance->FindNick(params[1]);
2714                                 if (u)
2715                                         Utils->DoOneToOne(prefix,"TIME",params,params[0]);
2716                         }
2717                 }
2718                 else if (params.size() == 3)
2719                 {
2720                         // a response to a previous TIME
2721                         userrec* u = this->Instance->FindNick(params[1]);
2722                         if ((u) && (IS_LOCAL(u)))
2723                         {
2724                         time_t rawtime = atol(params[2].c_str());
2725                         struct tm * timeinfo;
2726                         timeinfo = localtime(&rawtime);
2727                                 char tms[26];
2728                                 snprintf(tms,26,"%s",asctime(timeinfo));
2729                                 tms[24] = 0;
2730                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2731                         }
2732                         else
2733                         {
2734                                 if (u)
2735                                         Utils->DoOneToOne(prefix,"TIME",params,u->server);
2736                         }
2737                 }
2738                 return true;
2739         }
2740
2741         bool LocalPing(const std::string &prefix, std::deque<std::string> &params)
2742         {
2743                 if (params.size() < 1)
2744                         return true;
2745
2746                 if (params.size() == 1)
2747                 {
2748                         std::string stufftobounce = params[0];
2749                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2750                         return true;
2751                 }
2752                 else
2753                 {
2754                         std::string forwardto = params[1];
2755                         if (forwardto == this->Instance->Config->ServerName)
2756                         {
2757                                 // this is a ping for us, send back PONG to the requesting server
2758                                 params[1] = params[0];
2759                                 params[0] = forwardto;
2760                                 Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
2761                         }
2762                         else
2763                         {
2764                                 // not for us, pass it on :)
2765                                 Utils->DoOneToOne(prefix,"PING",params,forwardto);
2766                         }
2767                         return true;
2768                 }
2769         }
2770
2771         bool RemoveStatus(const std::string &prefix, std::deque<std::string> &params)
2772         {
2773                 if (params.size() < 1)
2774                         return true;
2775
2776                 chanrec* c = Instance->FindChan(params[0]);
2777
2778                 if (c)
2779                 {
2780                         irc::modestacker modestack(false);
2781                         CUList *ulist = c->GetUsers();
2782                         const char* y[127];
2783                         std::deque<std::string> stackresult;
2784                         std::string x;
2785
2786                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2787                         {
2788                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2789                                 if (modesequence.length())
2790                                 {
2791                                         Instance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2792                                         irc::spacesepstream sep(modesequence);
2793                                         std::string modeletters = sep.GetToken();
2794                                         Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2795
2796                                         while (!modeletters.empty())
2797                                         {
2798                                                 char mletter = *(modeletters.begin());
2799                                                 modestack.Push(mletter,sep.GetToken());
2800                                                 Instance->Log(DEBUG,"Push letter = '%c'",mletter);
2801                                                 modeletters.erase(modeletters.begin());
2802                                                 Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2803                                         }
2804                                 }
2805                         }
2806
2807                         while (modestack.GetStackedLine(stackresult))
2808                         {
2809                                 Instance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2810                                 stackresult.push_front(ConvToStr(c->age));
2811                                 stackresult.push_front(c->name);
2812                                 Utils->DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2813                                 stackresult.erase(stackresult.begin() + 1);
2814                                 Instance->Log(DEBUG,"Stacked items:");
2815                                 for (size_t z = 0; z < stackresult.size(); z++)
2816                                 {
2817                                         y[z] = stackresult[z].c_str();
2818                                         Instance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2819                                 }
2820                                 userrec* n = new userrec(Instance);
2821                                 n->SetFd(FD_MAGIC_NUMBER);
2822                                 Instance->SendMode(y, stackresult.size(), n);
2823                                 delete n;
2824                         }
2825                 }
2826                 return true;
2827         }
2828
2829         bool RemoteServer(const std::string &prefix, std::deque<std::string> &params)
2830         {
2831                 if (params.size() < 4)
2832                         return false;
2833
2834                 std::string servername = params[0];
2835                 std::string password = params[1];
2836                 // hopcount is not used for a remote server, we calculate this ourselves
2837                 std::string description = params[3];
2838                 TreeServer* ParentOfThis = Utils->FindServer(prefix);
2839
2840                 if (!ParentOfThis)
2841                 {
2842                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2843                         return false;
2844                 }
2845                 TreeServer* CheckDupe = Utils->FindServer(servername);
2846                 if (CheckDupe)
2847                 {
2848                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2849                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2850                         return false;
2851                 }
2852                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL);
2853                 ParentOfThis->AddChild(Node);
2854                 params[3] = ":" + params[3];
2855                 Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
2856                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2857                 return true;
2858         }
2859
2860         bool Outbound_Reply_Server(std::deque<std::string> &params)
2861         {
2862                 if (params.size() < 4)
2863                         return false;
2864
2865                 irc::string servername = params[0].c_str();
2866                 std::string sname = params[0];
2867                 std::string password = params[1];
2868                 int hops = atoi(params[2].c_str());
2869
2870                 if (hops)
2871                 {
2872                         this->WriteLine("ERROR :Server too far away for authentication");
2873                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2874                         return false;
2875                 }
2876                 std::string description = params[3];
2877                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2878                 {
2879                         if ((x->Name == servername) && (x->RecvPass == password))
2880                         {
2881                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2882                                 if (CheckDupe)
2883                                 {
2884                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2885                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2886                                         return false;
2887                                 }
2888                                 // Begin the sync here. this kickstarts the
2889                                 // other side, waiting in WAIT_AUTH_2 state,
2890                                 // into starting their burst, as it shows
2891                                 // that we're happy.
2892                                 this->LinkState = CONNECTED;
2893                                 // we should add the details of this server now
2894                                 // to the servers tree, as a child of the root
2895                                 // node.
2896                                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this);
2897                                 Utils->TreeRoot->AddChild(Node);
2898                                 params[3] = ":" + params[3];
2899                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
2900                                 this->bursting = true;
2901                                 this->DoBurst(Node);
2902                                 return true;
2903                         }
2904                 }
2905                 this->WriteLine("ERROR :Invalid credentials");
2906                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2907                 return false;
2908         }
2909
2910         bool Inbound_Server(std::deque<std::string> &params)
2911         {
2912                 if (params.size() < 4)
2913                         return false;
2914
2915                 irc::string servername = params[0].c_str();
2916                 std::string sname = params[0];
2917                 std::string password = params[1];
2918                 int hops = atoi(params[2].c_str());
2919
2920                 if (hops)
2921                 {
2922                         this->WriteLine("ERROR :Server too far away for authentication");
2923                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2924                         return false;
2925                 }
2926                 std::string description = params[3];
2927                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2928                 {
2929                         if ((x->Name == servername) && (x->RecvPass == password))
2930                         {
2931                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2932                                 if (CheckDupe)
2933                                 {
2934                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2935                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2936                                         return false;
2937                                 }
2938                                 /* If the config says this link is encrypted, but the remote side
2939                                  * hasnt bothered to send the AES command before SERVER, then we
2940                                  * boot them off as we MUST have this connection encrypted.
2941                                  */
2942                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2943                                 {
2944                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2945                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2946                                         return false;
2947                                 }
2948                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2949                                 this->InboundServerName = sname;
2950                                 this->InboundDescription = description;
2951                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2952                                 // along with the sendpass from this block.
2953                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2954                                 // move to the next state, we are now waiting for THEM.
2955                                 this->LinkState = WAIT_AUTH_2;
2956                                 return true;
2957                         }
2958                 }
2959                 this->WriteLine("ERROR :Invalid credentials");
2960                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2961                 return false;
2962         }
2963
2964         void Split(const std::string &line, std::deque<std::string> &n)
2965         {
2966                 n.clear();
2967                 irc::tokenstream tokens(line);
2968                 std::string param;
2969                 while ((param = tokens.GetToken()) != "")
2970                         n.push_back(param);
2971                 return;
2972         }
2973
2974         bool ProcessLine(std::string &line)
2975         {
2976                 std::deque<std::string> params;
2977                 irc::string command;
2978                 std::string prefix;
2979
2980                 if (line.empty())
2981                         return true;
2982
2983                 line = line.substr(0, line.find_first_of("\r\n"));
2984
2985                 Instance->Log(DEBUG,"IN: %s", line.c_str());
2986
2987                 this->Split(line.c_str(),params);
2988
2989                 if ((params[0][0] == ':') && (params.size() > 1))
2990                 {
2991                         prefix = params[0].substr(1);
2992                         params.pop_front();
2993                 }
2994
2995                 command = params[0].c_str();
2996                 params.pop_front();
2997
2998                 if ((!this->ctx_in) && (command == "AES"))
2999                 {
3000                         std::string sserv = params[0];
3001                         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
3002                         {
3003                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
3004                                 {
3005                                         this->InitAES(x->EncryptionKey,sserv);
3006                                 }
3007                         }
3008
3009                         return true;
3010                 }
3011                 else if ((this->ctx_in) && (command == "AES"))
3012                 {
3013                         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());
3014                 }
3015
3016                 switch (this->LinkState)
3017                 {
3018                         TreeServer* Node;
3019
3020                         case WAIT_AUTH_1:
3021                                 // Waiting for SERVER command from remote server. Server initiating
3022                                 // the connection sends the first SERVER command, listening server
3023                                 // replies with theirs if its happy, then if the initiator is happy,
3024                                 // it starts to send its net sync, which starts the merge, otherwise
3025                                 // it sends an ERROR.
3026                                 if (command == "PASS")
3027                                 {
3028                                         /* Silently ignored */
3029                                 }
3030                                 else if (command == "SERVER")
3031                                 {
3032                                         return this->Inbound_Server(params);
3033                                 }
3034                                 else if (command == "ERROR")
3035                                 {
3036                                         return this->Error(params);
3037                                 }
3038                                 else if (command == "USER")
3039                                 {
3040                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
3041                                         return false;
3042                                 }
3043                                 else if (command == "CAPAB")
3044                                 {
3045                                         return this->Capab(params);
3046                                 }
3047                                 else if ((command == "U") || (command == "S"))
3048                                 {
3049                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3050                                         return false;
3051                                 }
3052                                 else
3053                                 {
3054                                         std::string error("ERROR :Invalid command in negotiation phase: ");
3055                                         error.append(command.c_str());
3056                                         this->WriteLine(error);
3057                                         return false;
3058                                 }
3059                         break;
3060                         case WAIT_AUTH_2:
3061                                 // Waiting for start of other side's netmerge to say they liked our
3062                                 // password.
3063                                 if (command == "SERVER")
3064                                 {
3065                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
3066                                         // silently ignore.
3067                                         return true;
3068                                 }
3069                                 else if ((command == "U") || (command == "S"))
3070                                 {
3071                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3072                                         return false;
3073                                 }
3074                                 else if (command == "BURST")
3075                                 {
3076                                         if (params.size())
3077                                         {
3078                                                 /* If a time stamp is provided, try and check syncronization */
3079                                                 time_t THEM = atoi(params[0].c_str());
3080                                                 long delta = THEM-time(NULL);
3081                                                 if ((delta < -600) || (delta > 600))
3082                                                 {
3083                                                         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));
3084                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
3085                                                         return false;
3086                                                 }
3087                                                 else if ((delta < -60) || (delta > 60))
3088                                                 {
3089                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
3090                                                 }
3091                                         }
3092                                         this->LinkState = CONNECTED;
3093                                         Node = new TreeServer(this->Utils,this->Instance,InboundServerName,InboundDescription,Utils->TreeRoot,this);
3094                                         Utils->TreeRoot->AddChild(Node);
3095                                         params.clear();
3096                                         params.push_back(InboundServerName);
3097                                         params.push_back("*");
3098                                         params.push_back("1");
3099                                         params.push_back(":"+InboundDescription);
3100                                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
3101                                         this->bursting = true;
3102                                         this->DoBurst(Node);
3103                                 }
3104                                 else if (command == "ERROR")
3105                                 {
3106                                         return this->Error(params);
3107                                 }
3108                                 else if (command == "CAPAB")
3109                                 {
3110                                         return this->Capab(params);
3111                                 }
3112
3113                         break;
3114                         case LISTENER:
3115                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
3116                                 return false;
3117                         break;
3118                         case CONNECTING:
3119                                 if (command == "SERVER")
3120                                 {
3121                                         // another server we connected to, which was in WAIT_AUTH_1 state,
3122                                         // has just sent us their credentials. If we get this far, theyre
3123                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
3124                                         // if we're happy with this, we should send our netburst which
3125                                         // kickstarts the merge.
3126                                         return this->Outbound_Reply_Server(params);
3127                                 }
3128                                 else if (command == "ERROR")
3129                                 {
3130                                         return this->Error(params);
3131                                 }
3132                         break;
3133                         case CONNECTED:
3134                                 // This is the 'authenticated' state, when all passwords
3135                                 // have been exchanged and anything past this point is taken
3136                                 // as gospel.
3137
3138                                 if (prefix != "")
3139                                 {
3140                                         std::string direction = prefix;
3141                                         userrec* t = this->Instance->FindNick(prefix);
3142                                         if (t)
3143                                         {
3144                                                 direction = t->server;
3145                                         }
3146                                         TreeServer* route_back_again = Utils->BestRouteTo(direction);
3147                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3148                                         {
3149                                                 if (route_back_again)
3150                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3151                                                 return true;
3152                                         }
3153
3154                                         /* Fix by brain:
3155                                          * When there is activity on the socket, reset the ping counter so
3156                                          * that we're not wasting bandwidth pinging an active server.
3157                                          */
3158                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3159                                         route_back_again->SetPingFlag();
3160                                 }
3161
3162                                 if (command == "SVSMODE")
3163                                 {
3164                                         /* Services expects us to implement
3165                                          * SVSMODE. In inspircd its the same as
3166                                          * MODE anyway.
3167                                          */
3168                                         command = "MODE";
3169                                 }
3170                                 std::string target = "";
3171                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3172                                  * working with std::string here.
3173                                  */
3174                                 if ((command == "NICK") && (params.size() > 1))
3175                                 {
3176                                         return this->IntroduceClient(prefix,params);
3177                                 }
3178                                 else if (command == "FJOIN")
3179                                 {
3180                                         return this->ForceJoin(prefix,params);
3181                                 }
3182                                 else if (command == "STATS")
3183                                 {
3184                                         return this->Stats(prefix, params);
3185                                 }
3186                                 else if (command == "MOTD")
3187                                 {
3188                                         return this->Motd(prefix, params);
3189                                 }
3190                                 else if (command == "ADMIN")
3191                                 {
3192                                         return this->Admin(prefix, params);
3193                                 }
3194                                 else if (command == "SERVER")
3195                                 {
3196                                         return this->RemoteServer(prefix,params);
3197                                 }
3198                                 else if (command == "ERROR")
3199                                 {
3200                                         return this->Error(params);
3201                                 }
3202                                 else if (command == "OPERTYPE")
3203                                 {
3204                                         return this->OperType(prefix,params);
3205                                 }
3206                                 else if (command == "FMODE")
3207                                 {
3208                                         return this->ForceMode(prefix,params);
3209                                 }
3210                                 else if (command == "KILL")
3211                                 {
3212                                         return this->RemoteKill(prefix,params);
3213                                 }
3214                                 else if (command == "FTOPIC")
3215                                 {
3216                                         return this->ForceTopic(prefix,params);
3217                                 }
3218                                 else if (command == "REHASH")
3219                                 {
3220                                         return this->RemoteRehash(prefix,params);
3221                                 }
3222                                 else if (command == "METADATA")
3223                                 {
3224                                         return this->MetaData(prefix,params);
3225                                 }
3226                                 else if (command == "REMSTATUS")
3227                                 {
3228                                         return this->RemoveStatus(prefix,params);
3229                                 }
3230                                 else if (command == "PING")
3231                                 {
3232                                         /*
3233                                          * We just got a ping from a server that's bursting.
3234                                          * This can't be right, so set them to not bursting, and
3235                                          * apply their lines.
3236                                          */
3237                                         if (this->bursting)
3238                                         {
3239                                                 this->bursting = false;
3240                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3241                                         }
3242                                         if (prefix == "")
3243                                         {
3244                                                 prefix = this->GetName();
3245                                         }
3246                                         return this->LocalPing(prefix,params);
3247                                 }
3248                                 else if (command == "PONG")
3249                                 {
3250                                         /*
3251                                          * We just got a pong from a server that's bursting.
3252                                          * This can't be right, so set them to not bursting, and
3253                                          * apply their lines.
3254                                          */
3255                                         if (this->bursting)
3256                                         {
3257                                                 this->bursting = false;
3258                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3259                                         }
3260                                         if (prefix == "")
3261                                         {
3262                                                 prefix = this->GetName();
3263                                         }
3264                                         return this->LocalPong(prefix,params);
3265                                 }
3266                                 else if (command == "VERSION")
3267                                 {
3268                                         return this->ServerVersion(prefix,params);
3269                                 }
3270                                 else if (command == "FHOST")
3271                                 {
3272                                         return this->ChangeHost(prefix,params);
3273                                 }
3274                                 else if (command == "FNAME")
3275                                 {
3276                                         return this->ChangeName(prefix,params);
3277                                 }
3278                                 else if (command == "ADDLINE")
3279                                 {
3280                                         return this->AddLine(prefix,params);
3281                                 }
3282                                 else if (command == "SVSNICK")
3283                                 {
3284                                         if (prefix == "")
3285                                         {
3286                                                 prefix = this->GetName();
3287                                         }
3288                                         return this->ForceNick(prefix,params);
3289                                 }
3290                                 else if (command == "IDLE")
3291                                 {
3292                                         return this->Whois(prefix,params);
3293                                 }
3294                                 else if (command == "PUSH")
3295                                 {
3296                                         return this->Push(prefix,params);
3297                                 }
3298                                 else if (command == "TIME")
3299                                 {
3300                                         return this->Time(prefix,params);
3301                                 }
3302                                 else if ((command == "KICK") && (Utils->IsServer(prefix)))
3303                                 {
3304                                         std::string sourceserv = this->myhost;
3305                                         if (params.size() == 3)
3306                                         {
3307                                                 userrec* user = this->Instance->FindNick(params[1]);
3308                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3309                                                 if (user && chan)
3310                                                 {
3311                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3312                                                                 /* Yikes, the channels gone! */
3313                                                                 delete chan;
3314                                                 }
3315                                         }
3316                                         if (this->InboundServerName != "")
3317                                         {
3318                                                 sourceserv = this->InboundServerName;
3319                                         }
3320                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3321                                 }
3322                                 else if (command == "SVSJOIN")
3323                                 {
3324                                         if (prefix == "")
3325                                         {
3326                                                 prefix = this->GetName();
3327                                         }
3328                                         return this->ServiceJoin(prefix,params);
3329                                 }
3330                                 else if (command == "SQUIT")
3331                                 {
3332                                         if (params.size() == 2)
3333                                         {
3334                                                 this->Squit(Utils->FindServer(params[0]),params[1]);
3335                                         }
3336                                         return true;
3337                                 }
3338                                 else if (command == "ENDBURST")
3339                                 {
3340                                         this->bursting = false;
3341                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3342                                         std::string sourceserv = this->myhost;
3343                                         if (this->InboundServerName != "")
3344                                         {
3345                                                 sourceserv = this->InboundServerName;
3346                                         }
3347                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3348                                         return true;
3349                                 }
3350                                 else
3351                                 {
3352                                         // not a special inter-server command.
3353                                         // Emulate the actual user doing the command,
3354                                         // this saves us having a huge ugly parser.
3355                                         userrec* who = this->Instance->FindNick(prefix);
3356                                         std::string sourceserv = this->myhost;
3357                                         if (this->InboundServerName != "")
3358                                         {
3359                                                 sourceserv = this->InboundServerName;
3360                                         }
3361                                         if (who)
3362                                         {
3363                                                 if ((command == "NICK") && (params.size() > 0))
3364                                                 {
3365                                                         /* On nick messages, check that the nick doesnt
3366                                                          * already exist here. If it does, kill their copy,
3367                                                          * and our copy.
3368                                                          */
3369                                                         userrec* x = this->Instance->FindNick(params[0]);
3370                                                         if ((x) && (x != who))
3371                                                         {
3372                                                                 std::deque<std::string> p;
3373                                                                 p.push_back(params[0]);
3374                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3375                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3376                                                                 p.clear();
3377                                                                 p.push_back(prefix);
3378                                                                 p.push_back("Nickname collision");
3379                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3380                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3381                                                                 userrec* y = this->Instance->FindNick(prefix);
3382                                                                 if (y)
3383                                                                 {
3384                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3385                                                                 }
3386                                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3387                                                         }
3388                                                 }
3389                                                 // its a user
3390                                                 target = who->server;
3391                                                 const char* strparams[127];
3392                                                 for (unsigned int q = 0; q < params.size(); q++)
3393                                                 {
3394                                                         strparams[q] = params[q].c_str();
3395                                                 }
3396                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3397                                                 {
3398                                                         case CMD_INVALID:
3399                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3400                                                                 return false;
3401                                                         break;
3402                                                         case CMD_FAILURE:
3403                                                                 return true;
3404                                                         break;
3405                                                         default:
3406                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3407                                                         break;
3408                                                 }
3409                                         }
3410                                         else
3411                                         {
3412                                                 // its not a user. Its either a server, or somethings screwed up.
3413                                                 if (Utils->IsServer(prefix))
3414                                                 {
3415                                                         target = this->Instance->Config->ServerName;
3416                                                 }
3417                                                 else
3418                                                 {
3419                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3420                                                         return true;
3421                                                 }
3422                                         }
3423                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3424
3425                                 }
3426                                 return true;
3427                         break;
3428                 }
3429                 return true;
3430         }
3431
3432         virtual std::string GetName()
3433         {
3434                 std::string sourceserv = this->myhost;
3435                 if (this->InboundServerName != "")
3436                 {
3437                         sourceserv = this->InboundServerName;
3438                 }
3439                 return sourceserv;
3440         }
3441
3442         virtual void OnTimeout()
3443         {
3444                 if (this->LinkState == CONNECTING)
3445                 {
3446                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3447                         Link* MyLink = Utils->FindLink(myhost);
3448                         if (MyLink)
3449                                 Utils->DoFailOver(MyLink);
3450                 }
3451         }
3452
3453         virtual void OnClose()
3454         {
3455                 // Connection closed.
3456                 // If the connection is fully up (state CONNECTED)
3457                 // then propogate a netsplit to all peers.
3458                 std::string quitserver = this->myhost;
3459                 if (this->InboundServerName != "")
3460                 {
3461                         quitserver = this->InboundServerName;
3462                 }
3463                 TreeServer* s = Utils->FindServer(quitserver);
3464                 if (s)
3465                 {
3466                         Squit(s,"Remote host closed the connection");
3467                 }
3468
3469                 if (quitserver != "")
3470                         this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3471         }
3472
3473         virtual int OnIncomingConnection(int newsock, char* ip)
3474         {
3475                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3476                  * or discovering if this port is the server port, we don't allow connections from any
3477                  * IPs for which we don't have a link block.
3478                  */
3479                 bool found = false;
3480
3481                 found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
3482                 if (!found)
3483                 {
3484                         for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
3485                                 if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
3486                                         found = true;
3487
3488                         if (!found)
3489                         {
3490                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3491                                 close(newsock);
3492                                 return false;
3493                         }
3494                 }
3495                 TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip);
3496                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3497                 return true;
3498         }
3499 };
3500
3501 /** This class is used to resolve server hostnames during /connect and autoconnect.
3502  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3503  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3504  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3505  * will have an IP address which we can then use to continue our connection.
3506  */
3507 class ServernameResolver : public Resolver
3508 {
3509  private:
3510         /** A copy of the Link tag info for what we're connecting to.
3511          * We take a copy, rather than using a pointer, just in case the
3512          * admin takes the tag away and rehashes while the domain is resolving.
3513          */
3514         Link MyLink;
3515         SpanningTreeUtilities* Utils;
3516  public:
3517         ServernameResolver(SpanningTreeUtilities* Util, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x), Utils(Util)
3518         {
3519                 /* Nothing in here, folks */
3520         }
3521
3522         void OnLookupComplete(const std::string &result)
3523         {
3524                 /* Initiate the connection, now that we have an IP to use.
3525                  * Passing a hostname directly to InspSocket causes it to
3526                  * just bail and set its FD to -1.
3527                  */
3528                 TreeServer* CheckDupe = Utils->FindServer(MyLink.Name.c_str());
3529                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3530                 {
3531                         TreeSocket* newsocket = new TreeSocket(this->Utils, ServerInstance, result,MyLink.Port,false,MyLink.Timeout ? MyLink.Timeout : 10,MyLink.Name.c_str());
3532                         if (newsocket->GetFd() > -1)
3533                         {
3534                                 /* We're all OK */
3535                         }
3536                         else
3537                         {
3538                                 /* Something barfed, show the opers */
3539                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3540                                 delete newsocket;
3541                                 Utils->DoFailOver(&MyLink);
3542                         }
3543                 }
3544         }
3545
3546         void OnError(ResolverError e, const std::string &errormessage)
3547         {
3548                 /* Ooops! */
3549                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3550                 Utils->DoFailOver(&MyLink);
3551         }
3552 };
3553
3554 /** Handle resolving of server IPs for the cache
3555  */
3556 class SecurityIPResolver : public Resolver
3557 {
3558  private:
3559         Link MyLink;
3560         SpanningTreeUtilities* Utils;
3561  public:
3562         SecurityIPResolver(SpanningTreeUtilities* U, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x), Utils(U)
3563         {
3564         }
3565
3566         void OnLookupComplete(const std::string &result)
3567         {
3568                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3569                 Utils->ValidIPs.push_back(result);
3570         }
3571
3572         void OnError(ResolverError e, const std::string &errormessage)
3573         {
3574                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3575         }
3576 };
3577
3578 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
3579 {
3580         Bindings.clear();
3581         this->ReadConfiguration(true);
3582         this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3583 }
3584
3585 SpanningTreeUtilities::~SpanningTreeUtilities()
3586 {
3587         for (unsigned int i = 0; i < Bindings.size(); i++)
3588         {
3589                 ServerInstance->Log(DEBUG,"Freeing binding %d of %d",i, Bindings.size());
3590                 ServerInstance->SE->DelFd(Bindings[i]);
3591                 Bindings[i]->Close();
3592                 DELETE(Bindings[i]);
3593         }
3594         ServerInstance->Log(DEBUG,"Freeing connected servers...");
3595         while (TreeRoot->ChildCount())
3596         {
3597                 TreeServer* child_server = TreeRoot->GetChild(0);
3598                 ServerInstance->Log(DEBUG,"Freeing connected server %s", child_server->GetName().c_str());
3599                 if (child_server)
3600                 {
3601                         TreeSocket* sock = child_server->GetSocket();
3602                         ServerInstance->SE->DelFd(sock);
3603                         sock->Close();
3604                         DELETE(sock);
3605                 }
3606         }
3607         delete TreeRoot;
3608 }
3609
3610 void SpanningTreeUtilities::AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3611 {
3612         for (unsigned int c = 0; c < list.size(); c++)
3613         {
3614                 if (list[c] == server)
3615                 {
3616                         return;
3617                 }
3618         }
3619         list.push_back(server);
3620 }
3621
3622 /** returns a list of DIRECT servernames for a specific channel */
3623 void SpanningTreeUtilities::GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3624 {
3625         CUList *ulist = c->GetUsers();
3626         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3627         {
3628                 if (i->second->GetFd() < 0)
3629                 {
3630                         TreeServer* best = this->BestRouteTo(i->second->server);
3631                         if (best)
3632                                 AddThisServer(best,list);
3633                 }
3634         }
3635         return;
3636 }
3637
3638 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params)
3639 {
3640         TreeServer* omitroute = this->BestRouteTo(omit);
3641         if ((command == "NOTICE") || (command == "PRIVMSG"))
3642         {
3643                 if (params.size() >= 2)
3644                 {
3645                         /* Prefixes */
3646                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3647                         {
3648                                 params[0] = params[0].substr(1, params[0].length()-1);
3649                         }
3650                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3651                         {
3652                                 // special routing for private messages/notices
3653                                 userrec* d = ServerInstance->FindNick(params[0]);
3654                                 if (d)
3655                                 {
3656                                         std::deque<std::string> par;
3657                                         par.push_back(params[0]);
3658                                         par.push_back(":"+params[1]);
3659                                         this->DoOneToOne(prefix,command.c_str(),par,d->server);
3660                                         return true;
3661                                 }
3662                         }
3663                         else if (*(params[0].c_str()) == '$')
3664                         {
3665                                 std::deque<std::string> par;
3666                                 par.push_back(params[0]);
3667                                 par.push_back(":"+params[1]);
3668                                 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3669                                 return true;
3670                         }
3671                         else
3672                         {
3673                                 chanrec* c = ServerInstance->FindChan(params[0]);
3674                                 if (c)
3675                                 {
3676                                         std::deque<TreeServer*> list;
3677                                         GetListOfServersForChannel(c,list);
3678                                         unsigned int lsize = list.size();
3679                                         for (unsigned int i = 0; i < lsize; i++)
3680                                         {
3681                                                 TreeSocket* Sock = list[i]->GetSocket();
3682                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3683                                                 {
3684                                                         Sock->WriteLine(data);
3685                                                 }
3686                                         }
3687                                         return true;
3688                                 }
3689                         }
3690                 }
3691         }
3692         unsigned int items =this->TreeRoot->ChildCount();
3693         for (unsigned int x = 0; x < items; x++)
3694         {
3695                 TreeServer* Route = this->TreeRoot->GetChild(x);
3696                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3697                 {
3698                         TreeSocket* Sock = Route->GetSocket();
3699                         if (Sock)
3700                                 Sock->WriteLine(data);
3701                 }
3702         }
3703         return true;
3704 }
3705
3706 bool SpanningTreeUtilities::DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit)
3707 {
3708         TreeServer* omitroute = this->BestRouteTo(omit);
3709         std::string FullLine = ":" + prefix + " " + command;
3710         unsigned int words = params.size();
3711         for (unsigned int x = 0; x < words; x++)
3712         {
3713                 FullLine = FullLine + " " + params[x];
3714         }
3715         unsigned int items = this->TreeRoot->ChildCount();
3716         for (unsigned int x = 0; x < items; x++)
3717         {
3718                 TreeServer* Route = this->TreeRoot->GetChild(x);
3719                 // Send the line IF:
3720                 // The route has a socket (its a direct connection)
3721                 // The route isnt the one to be omitted
3722                 // The route isnt the path to the one to be omitted
3723                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3724                 {
3725                         TreeSocket* Sock = Route->GetSocket();
3726                         if (Sock)
3727                                 Sock->WriteLine(FullLine);
3728                 }
3729         }
3730         return true;
3731 }
3732
3733 bool SpanningTreeUtilities::DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params)
3734 {
3735         std::string FullLine = ":" + prefix + " " + command;
3736         unsigned int words = params.size();
3737         for (unsigned int x = 0; x < words; x++)
3738         {
3739                 FullLine = FullLine + " " + params[x];
3740         }
3741         unsigned int items = this->TreeRoot->ChildCount();
3742         for (unsigned int x = 0; x < items; x++)
3743         {
3744                 TreeServer* Route = this->TreeRoot->GetChild(x);
3745                 if (Route && Route->GetSocket())
3746                 {
3747                         TreeSocket* Sock = Route->GetSocket();
3748                         if (Sock)
3749                                 Sock->WriteLine(FullLine);
3750                 }
3751         }
3752         return true;
3753 }
3754
3755 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3756 {
3757         std::string spfx = prefix;
3758         std::string scmd = command;
3759         return this->DoOneToMany(spfx, scmd, params);
3760 }
3761
3762 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3763 {
3764         std::string spfx = prefix;
3765         std::string scmd = command;
3766         return this->DoOneToAllButSender(spfx, scmd, params, omit);
3767 }
3768
3769 bool SpanningTreeUtilities::DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target)
3770 {
3771         TreeServer* Route = this->BestRouteTo(target);
3772         if (Route)
3773         {
3774                 std::string FullLine = ":" + prefix + " " + command;
3775                 unsigned int words = params.size();
3776                 for (unsigned int x = 0; x < words; x++)
3777                 {
3778                         FullLine = FullLine + " " + params[x];
3779                 }
3780                 if (Route && Route->GetSocket())
3781                 {
3782                         TreeSocket* Sock = Route->GetSocket();
3783                         if (Sock)
3784                                 Sock->WriteLine(FullLine);
3785                 }
3786                 return true;
3787         }
3788         else
3789         {
3790                 return false;
3791         }
3792 }
3793
3794 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
3795 {
3796         ConfigReader* Conf = new ConfigReader(ServerInstance);
3797         if (rebind)
3798         {
3799                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3800                 {
3801                         std::string Type = Conf->ReadValue("bind","type",j);
3802                         std::string IP = Conf->ReadValue("bind","address",j);
3803                         int Port = Conf->ReadInteger("bind","port",j,true);
3804                         if (Type == "servers")
3805                         {
3806                                 ServerInstance->Log(DEBUG,"m_spanningtree: Binding server port %s:%d", IP.c_str(), Port);
3807                                 if (IP == "*")
3808                                 {
3809                                         IP = "";
3810                                 }
3811                                 TreeSocket* listener = new TreeSocket(this, ServerInstance, IP.c_str(),Port,true,10);
3812                                 if (listener->GetState() == I_LISTENING)
3813                                 {
3814                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), Port);
3815                                         Bindings.push_back(listener);
3816                                 }
3817                                 else
3818                                 {
3819                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3820                                         listener->Close();
3821                                         DELETE(listener);
3822                                 }
3823                                 ServerInstance->Log(DEBUG,"Done with this binding");
3824                         }
3825                 }
3826         }
3827         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3828         HideULines = Conf->ReadFlag("options","hideulines",0);
3829         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
3830         LinkBlocks.clear();
3831         ValidIPs.clear();
3832         for (int j =0; j < Conf->Enumerate("link"); j++)
3833         {
3834                 Link L;
3835                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3836                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3837                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3838                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3839                 L.Port = Conf->ReadInteger("link","port",j,true);
3840                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3841                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3842                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3843                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3844                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3845                 L.Timeout = Conf->ReadInteger("link","timeout",j,true);
3846                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3847                 /* Bugfix by brain, do not allow people to enter bad configurations */
3848                 if (L.Name != ServerInstance->Config->ServerName)
3849                 {
3850                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3851                         {
3852                                 ValidIPs.push_back(L.IPAddr);
3853
3854                                 if (Allow.length())
3855                                         ValidIPs.push_back(Allow);
3856
3857                                 /* Needs resolving */
3858                                 insp_inaddr binip;
3859                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3860                                 {
3861                                         try
3862                                         {
3863                                                 SecurityIPResolver* sr = new SecurityIPResolver(this, ServerInstance, L.IPAddr, L);
3864                                                 ServerInstance->AddResolver(sr);
3865                                         }
3866                                         catch (ModuleException& e)
3867                                         {
3868                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3869                                         }
3870                                 }
3871
3872                                 LinkBlocks.push_back(L);
3873                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3874                         }
3875                         else
3876                         {
3877                                 if (L.IPAddr == "")
3878                                 {
3879                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3880                                 }
3881                                 else if (L.RecvPass == "")
3882                                 {
3883                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3884                                 }
3885                                 else if (L.SendPass == "")
3886                                 {
3887                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3888                                 }
3889                                 else if (L.Name == "")
3890                                 {
3891                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3892                                 }
3893                                 else if (!L.Port)
3894                                 {
3895                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3896                                 }
3897                         }
3898                 }
3899                 else
3900                 {
3901                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3902                 }
3903         }
3904         DELETE(Conf);
3905 }
3906
3907
3908
3909 class ModuleSpanningTree : public Module
3910 {
3911         int line;
3912         int NumServers;
3913         unsigned int max_local;
3914         unsigned int max_global;
3915         cmd_rconnect* command_rconnect;
3916         SpanningTreeUtilities* Utils;
3917
3918  public:
3919
3920         ModuleSpanningTree(InspIRCd* Me)
3921                 : Module::Module(Me), max_local(0), max_global(0)
3922         {
3923                 Utils = new SpanningTreeUtilities(Me, this);
3924
3925                 command_rconnect = new cmd_rconnect(ServerInstance, this, Utils);
3926                 ServerInstance->AddCommand(command_rconnect);
3927         }
3928
3929         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3930         {
3931                 std::string Parent = Utils->TreeRoot->GetName();
3932                 if (Current->GetParent())
3933                 {
3934                         Parent = Current->GetParent()->GetName();
3935                 }
3936                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3937                 {
3938                         if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3939                         {
3940                                 if (*user->oper)
3941                                 {
3942                                          ShowLinks(Current->GetChild(q),user,hops+1);
3943                                 }
3944                         }
3945                         else
3946                         {
3947                                 ShowLinks(Current->GetChild(q),user,hops+1);
3948                         }
3949                 }
3950                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3951                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3952                         return;
3953                 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());
3954         }
3955
3956         int CountLocalServs()
3957         {
3958                 return Utils->TreeRoot->ChildCount();
3959         }
3960
3961         int CountServs()
3962         {
3963                 return Utils->serverlist.size();
3964         }
3965
3966         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3967         {
3968                 ShowLinks(Utils->TreeRoot,user,0);
3969                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3970                 return;
3971         }
3972
3973         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3974         {
3975                 unsigned int n_users = ServerInstance->UserCount();
3976
3977                 /* Only update these when someone wants to see them, more efficient */
3978                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3979                         max_local = ServerInstance->LocalUserCount();
3980                 if (n_users > max_global)
3981                         max_global = n_users;
3982
3983                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3984                 if (ServerInstance->OperCount())
3985                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3986                 if (ServerInstance->UnregisteredUserCount())
3987                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3988                 if (ServerInstance->ChannelCount())
3989                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3990                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3991                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3992                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3993                 return;
3994         }
3995
3996         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3997
3998         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3999         {
4000                 if (line < 128)
4001                 {
4002                         for (int t = 0; t < depth; t++)
4003                         {
4004                                 matrix[line][t] = ' ';
4005                         }
4006
4007                         // For Aligning, we need to work out exactly how deep this thing is, and produce
4008                         // a 'Spacer' String to compensate.
4009                         char spacer[40];
4010
4011                         memset(spacer,' ',40);
4012                         if ((40 - Current->GetName().length() - depth) > 1) {
4013                                 spacer[40 - Current->GetName().length() - depth] = '\0';
4014                         }
4015                         else
4016                         {
4017                                 spacer[5] = '\0';
4018                         }
4019
4020                         float percent;
4021                         char text[80];
4022                         if (ServerInstance->clientlist.size() == 0) {
4023                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
4024                                 percent = 0;
4025                         }
4026                         else
4027                         {
4028                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
4029                         }
4030                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
4031                         totusers += Current->GetUserCount();
4032                         totservers++;
4033                         strlcpy(&matrix[line][depth],text,80);
4034                         line++;
4035                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
4036                         {
4037                                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
4038                                 {
4039                                         if (*user->oper)
4040                                         {
4041                                                 ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4042                                         }
4043                                 }
4044                                 else
4045                                 {
4046                                         ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4047                                 }
4048                         }
4049                 }
4050         }
4051
4052         int HandleMotd(const char** parameters, int pcnt, userrec* user)
4053         {
4054                 if (pcnt > 0)
4055                 {
4056                         /* Remote MOTD, the server is within the 1st parameter */
4057                         std::deque<std::string> params;
4058                         params.push_back(parameters[0]);
4059
4060                         /* Send it out remotely, generate no reply yet */
4061                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4062                         if (s)
4063                         {
4064                                 Utils->DoOneToOne(user->nick, "MOTD", params, s->GetName());
4065                         }
4066                         else
4067                         {
4068                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4069                         }
4070                         return 1;
4071                 }
4072                 return 0;
4073         }
4074
4075         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
4076         {
4077                 if (pcnt > 0)
4078                 {
4079                         /* Remote ADMIN, the server is within the 1st parameter */
4080                         std::deque<std::string> params;
4081                         params.push_back(parameters[0]);
4082
4083                         /* Send it out remotely, generate no reply yet */
4084                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4085                         if (s)
4086                         {
4087                                 Utils->DoOneToOne(user->nick, "ADMIN", params, s->GetName());
4088                         }
4089                         else
4090                         {
4091                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4092                         }
4093                         return 1;
4094                 }
4095                 return 0;
4096         }
4097
4098         int HandleStats(const char** parameters, int pcnt, userrec* user)
4099         {
4100                 if (pcnt > 1)
4101                 {
4102                         /* Remote STATS, the server is within the 2nd parameter */
4103                         std::deque<std::string> params;
4104                         params.push_back(parameters[0]);
4105                         params.push_back(parameters[1]);
4106                         /* Send it out remotely, generate no reply yet */
4107                         TreeServer* s = Utils->FindServerMask(parameters[1]);
4108                         if (s)
4109                         {
4110                                 params[1] = s->GetName();
4111                                 Utils->DoOneToOne(user->nick, "STATS", params, s->GetName());
4112                         }
4113                         else
4114                         {
4115                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4116                         }
4117                         return 1;
4118                 }
4119                 return 0;
4120         }
4121
4122         // Ok, prepare to be confused.
4123         // After much mulling over how to approach this, it struck me that
4124         // the 'usual' way of doing a /MAP isnt the best way. Instead of
4125         // keeping track of a ton of ascii characters, and line by line
4126         // under recursion working out where to place them using multiplications
4127         // and divisons, we instead render the map onto a backplane of characters
4128         // (a character matrix), then draw the branches as a series of "L" shapes
4129         // from the nodes. This is not only friendlier on CPU it uses less stack.
4130
4131         void HandleMap(const char** parameters, int pcnt, userrec* user)
4132         {
4133                 // This array represents a virtual screen which we will
4134                 // "scratch" draw to, as the console device of an irc
4135                 // client does not provide for a proper terminal.
4136                 float totusers = 0;
4137                 float totservers = 0;
4138                 char matrix[128][80];
4139                 for (unsigned int t = 0; t < 128; t++)
4140                 {
4141                         matrix[t][0] = '\0';
4142                 }
4143                 line = 0;
4144                 // The only recursive bit is called here.
4145                 ShowMap(Utils->TreeRoot,user,0,matrix,totusers,totservers);
4146                 // Process each line one by one. The algorithm has a limit of
4147                 // 128 servers (which is far more than a spanning tree should have
4148                 // anyway, so we're ok). This limit can be raised simply by making
4149                 // the character matrix deeper, 128 rows taking 10k of memory.
4150                 for (int l = 1; l < line; l++)
4151                 {
4152                         // scan across the line looking for the start of the
4153                         // servername (the recursive part of the algorithm has placed
4154                         // the servers at indented positions depending on what they
4155                         // are related to)
4156                         int first_nonspace = 0;
4157                         while (matrix[l][first_nonspace] == ' ')
4158                         {
4159                                 first_nonspace++;
4160                         }
4161                         first_nonspace--;
4162                         // Draw the `- (corner) section: this may be overwritten by
4163                         // another L shape passing along the same vertical pane, becoming
4164                         // a |- (branch) section instead.
4165                         matrix[l][first_nonspace] = '-';
4166                         matrix[l][first_nonspace-1] = '`';
4167                         int l2 = l - 1;
4168                         // Draw upwards until we hit the parent server, causing possibly
4169                         // other corners (`-) to become branches (|-)
4170                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
4171                         {
4172                                 matrix[l2][first_nonspace-1] = '|';
4173                                 l2--;
4174                         }
4175                 }
4176                 // dump the whole lot to the user. This is the easy bit, honest.
4177                 for (int t = 0; t < line; t++)
4178                 {
4179                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4180                 }
4181                 float avg_users = totusers / totservers;
4182                 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);
4183         user->WriteServ("007 %s :End of /MAP",user->nick);
4184                 return;
4185         }
4186
4187         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4188         {
4189                 TreeServer* s = Utils->FindServerMask(parameters[0]);
4190                 if (s)
4191                 {
4192                         if (s == Utils->TreeRoot)
4193                         {
4194                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4195                                 return 1;
4196                         }
4197                         TreeSocket* sock = s->GetSocket();
4198                         if (sock)
4199                         {
4200                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4201                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4202                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
4203                                 ServerInstance->SE->DelFd(sock);
4204                                 sock->Close();
4205                                 delete sock;
4206                         }
4207                         else
4208                         {
4209                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
4210                         }
4211                 }
4212                 else
4213                 {
4214                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4215                 }
4216                 return 1;
4217         }
4218
4219         int HandleTime(const char** parameters, int pcnt, userrec* user)
4220         {
4221                 if ((IS_LOCAL(user)) && (pcnt))
4222                 {
4223                         TreeServer* found = Utils->FindServerMask(parameters[0]);
4224                         if (found)
4225                         {
4226                                 // we dont' override for local server
4227                                 if (found == Utils->TreeRoot)
4228                                         return 0;
4229
4230                                 std::deque<std::string> params;
4231                                 params.push_back(found->GetName());
4232                                 params.push_back(user->nick);
4233                                 Utils->DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4234                         }
4235                         else
4236                         {
4237                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4238                         }
4239                 }
4240                 return 1;
4241         }
4242
4243         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4244         {
4245                 if ((IS_LOCAL(user)) && (pcnt > 1))
4246                 {
4247                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4248                         if ((remote) && (remote->GetFd() < 0))
4249                         {
4250                                 std::deque<std::string> params;
4251                                 params.push_back(parameters[1]);
4252                                 Utils->DoOneToOne(user->nick,"IDLE",params,remote->server);
4253                                 return 1;
4254                         }
4255                         else if (!remote)
4256                         {
4257                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4258                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4259                                 return 1;
4260                         }
4261                 }
4262                 return 0;
4263         }
4264
4265         void DoPingChecks(time_t curtime)
4266         {
4267                 for (unsigned int j = 0; j < Utils->TreeRoot->ChildCount(); j++)
4268                 {
4269                         TreeServer* serv = Utils->TreeRoot->GetChild(j);
4270                         TreeSocket* sock = serv->GetSocket();
4271                         if (sock)
4272                         {
4273                                 if (curtime >= serv->NextPingTime())
4274                                 {
4275                                         if (serv->AnsweredLastPing())
4276                                         {
4277                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4278                                                 serv->SetNextPingTime(curtime + 60);
4279                                         }
4280                                         else
4281                                         {
4282                                                 // they didnt answer, boot them
4283                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4284                                                 sock->Squit(serv,"Ping timeout");
4285                                                 ServerInstance->SE->DelFd(sock);
4286                                                 sock->Close();
4287                                                 delete sock;
4288                                                 return;
4289                                         }
4290                                 }
4291                         }
4292                 }
4293         }
4294
4295         void ConnectServer(Link* x)
4296         {
4297                 insp_inaddr binip;
4298
4299                 /* Do we already have an IP? If so, no need to resolve it. */
4300                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4301                 {
4302                         TreeSocket* newsocket = new TreeSocket(Utils, ServerInstance, x->IPAddr,x->Port,false,x->Timeout ? x->Timeout : 10,x->Name.c_str());
4303                         if (newsocket->GetFd() > -1)
4304                         {
4305                                 /* Handled automatically on success */
4306                         }
4307                         else
4308                         {
4309                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4310                                 delete newsocket;
4311                                 Utils->DoFailOver(x);
4312                         }
4313                 }
4314                 else
4315                 {
4316                         try
4317                         {
4318                                 ServernameResolver* snr = new ServernameResolver(Utils, ServerInstance,x->IPAddr, *x);
4319                                 ServerInstance->AddResolver(snr);
4320                         }
4321                         catch (ModuleException& e)
4322                         {
4323                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4324                                 Utils->DoFailOver(x);
4325                         }
4326                 }
4327         }
4328
4329         void AutoConnectServers(time_t curtime)
4330         {
4331                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4332                 {
4333                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4334                         {
4335                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4336                                 x->NextConnectTime = curtime + x->AutoConnect;
4337                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4338                                 if (x->FailOver.length())
4339                                 {
4340                                         TreeServer* CheckFailOver = Utils->FindServer(x->FailOver.c_str());
4341                                         if (CheckFailOver)
4342                                         {
4343                                                 /* The failover for this server is currently a member of the network.
4344                                                  * The failover probably succeeded, where the main link did not.
4345                                                  * Don't try the main link until the failover is gone again.
4346                                                  */
4347                                                 continue;
4348                                         }
4349                                 }
4350                                 if (!CheckDupe)
4351                                 {
4352                                         // an autoconnected server is not connected. Check if its time to connect it
4353                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4354                                         this->ConnectServer(&(*x));
4355                                 }
4356                         }
4357                 }
4358         }
4359
4360         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4361         {
4362                 // we've already checked if pcnt > 0, so this is safe
4363                 TreeServer* found = Utils->FindServerMask(parameters[0]);
4364                 if (found)
4365                 {
4366                         std::string Version = found->GetVersion();
4367                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4368                         if (found == Utils->TreeRoot)
4369                         {
4370                                 std::stringstream out(ServerInstance->Config->data005);
4371                                 std::string token = "";
4372                                 std::string line5 = "";
4373                                 int token_counter = 0;
4374
4375                                 while (!out.eof())
4376                                 {
4377                                         out >> token;
4378                                         line5 = line5 + token + " ";
4379                                         token_counter++;
4380
4381                                         if ((token_counter >= 13) || (out.eof() == true))
4382                                         {
4383                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4384                                                 line5 = "";
4385                                                 token_counter = 0;
4386                                         }
4387                                 }
4388                         }
4389                 }
4390                 else
4391                 {
4392                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4393                 }
4394                 return 1;
4395         }
4396
4397         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4398         {
4399                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4400                 {
4401                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4402                         {
4403                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4404                                 if (!CheckDupe)
4405                                 {
4406                                         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);
4407                                         ConnectServer(&(*x));
4408                                         return 1;
4409                                 }
4410                                 else
4411                                 {
4412                                         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());
4413                                         return 1;
4414                                 }
4415                         }
4416                 }
4417                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4418                 return 1;
4419         }
4420
4421         virtual int OnStats(char statschar, userrec* user, string_list &results)
4422         {
4423                 if (statschar == 'c')
4424                 {
4425                         for (unsigned int i = 0; i < Utils->LinkBlocks.size(); i++)
4426                         {
4427                                 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');
4428                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+Utils->LinkBlocks[i].Name.c_str());
4429                         }
4430                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4431                         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);
4432                         return 1;
4433                 }
4434                 return 0;
4435         }
4436
4437         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4438         {
4439                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4440                 if (!validated)
4441                         return 0;
4442
4443                 if (command == "CONNECT")
4444                 {
4445                         return this->HandleConnect(parameters,pcnt,user);
4446                 }
4447                 else if (command == "STATS")
4448                 {
4449                         return this->HandleStats(parameters,pcnt,user);
4450                 }
4451                 else if (command == "MOTD")
4452                 {
4453                         return this->HandleMotd(parameters,pcnt,user);
4454                 }
4455                 else if (command == "ADMIN")
4456                 {
4457                         return this->HandleAdmin(parameters,pcnt,user);
4458                 }
4459                 else if (command == "SQUIT")
4460                 {
4461                         return this->HandleSquit(parameters,pcnt,user);
4462                 }
4463                 else if (command == "MAP")
4464                 {
4465                         this->HandleMap(parameters,pcnt,user);
4466                         return 1;
4467                 }
4468                 else if ((command == "TIME") && (pcnt > 0))
4469                 {
4470                         return this->HandleTime(parameters,pcnt,user);
4471                 }
4472                 else if (command == "LUSERS")
4473                 {
4474                         this->HandleLusers(parameters,pcnt,user);
4475                         return 1;
4476                 }
4477                 else if (command == "LINKS")
4478                 {
4479                         this->HandleLinks(parameters,pcnt,user);
4480                         return 1;
4481                 }
4482                 else if (command == "WHOIS")
4483                 {
4484                         if (pcnt > 1)
4485                         {
4486                                 // remote whois
4487                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4488                         }
4489                 }
4490                 else if ((command == "VERSION") && (pcnt > 0))
4491                 {
4492                         this->HandleVersion(parameters,pcnt,user);
4493                         return 1;
4494                 }
4495
4496                 return 0;
4497         }
4498
4499         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4500         {
4501                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4502                 {
4503                         // this bit of code cleverly routes all module commands
4504                         // to all remote severs *automatically* so that modules
4505                         // can just handle commands locally, without having
4506                         // to have any special provision in place for remote
4507                         // commands and linking protocols.
4508                         std::deque<std::string> params;
4509                         params.clear();
4510                         for (int j = 0; j < pcnt; j++)
4511                         {
4512                                 if (strchr(parameters[j],' '))
4513                                 {
4514                                         params.push_back(":" + std::string(parameters[j]));
4515                                 }
4516                                 else
4517                                 {
4518                                         params.push_back(std::string(parameters[j]));
4519                                 }
4520                         }
4521                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4522                         Utils->DoOneToMany(user->nick,command,params);
4523                 }
4524         }
4525
4526         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4527         {
4528                 TreeServer* s = Utils->FindServer(servername);
4529                 if (s)
4530                 {
4531                         description = s->GetDesc();
4532                 }
4533         }
4534
4535         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4536         {
4537                 if (IS_LOCAL(source))
4538                 {
4539                         std::deque<std::string> params;
4540                         params.push_back(dest->nick);
4541                         params.push_back(channel->name);
4542                         Utils->DoOneToMany(source->nick,"INVITE",params);
4543                 }
4544         }
4545
4546         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4547         {
4548                 std::deque<std::string> params;
4549                 params.push_back(chan->name);
4550                 params.push_back(":"+topic);
4551                 Utils->DoOneToMany(user->nick,"TOPIC",params);
4552         }
4553
4554         virtual void OnWallops(userrec* user, const std::string &text)
4555         {
4556                 if (IS_LOCAL(user))
4557                 {
4558                         std::deque<std::string> params;
4559                         params.push_back(":"+text);
4560                         Utils->DoOneToMany(user->nick,"WALLOPS",params);
4561                 }
4562         }
4563
4564         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4565         {
4566                 if (target_type == TYPE_USER)
4567                 {
4568                         userrec* d = (userrec*)dest;
4569                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4570                         {
4571                                 std::deque<std::string> params;
4572                                 params.clear();
4573                                 params.push_back(d->nick);
4574                                 params.push_back(":"+text);
4575                                 Utils->DoOneToOne(user->nick,"NOTICE",params,d->server);
4576                         }
4577                 }
4578                 else if (target_type == TYPE_CHANNEL)
4579                 {
4580                         if (IS_LOCAL(user))
4581                         {
4582                                 chanrec *c = (chanrec*)dest;
4583                                 if (c)
4584                                 {
4585                                         std::string cname = c->name;
4586                                         if (status)
4587                                                 cname = status + cname;
4588                                         std::deque<TreeServer*> list;
4589                                         Utils->GetListOfServersForChannel(c,list);
4590                                         unsigned int ucount = list.size();
4591                                         for (unsigned int i = 0; i < ucount; i++)
4592                                         {
4593                                                 TreeSocket* Sock = list[i]->GetSocket();
4594                                                 if (Sock)
4595                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4596                                         }
4597                                 }
4598                         }
4599                 }
4600                 else if (target_type == TYPE_SERVER)
4601                 {
4602                         if (IS_LOCAL(user))
4603                         {
4604                                 char* target = (char*)dest;
4605                                 std::deque<std::string> par;
4606                                 par.push_back(target);
4607                                 par.push_back(":"+text);
4608                                 Utils->DoOneToMany(user->nick,"NOTICE",par);
4609                         }
4610                 }
4611         }
4612
4613         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4614         {
4615                 if (target_type == TYPE_USER)
4616                 {
4617                         // route private messages which are targetted at clients only to the server
4618                         // which needs to receive them
4619                         userrec* d = (userrec*)dest;
4620                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4621                         {
4622                                 std::deque<std::string> params;
4623                                 params.clear();
4624                                 params.push_back(d->nick);
4625                                 params.push_back(":"+text);
4626                                 Utils->DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4627                         }
4628                 }
4629                 else if (target_type == TYPE_CHANNEL)
4630                 {
4631                         if (IS_LOCAL(user))
4632                         {
4633                                 chanrec *c = (chanrec*)dest;
4634                                 if (c)
4635                                 {
4636                                         std::string cname = c->name;
4637                                         if (status)
4638                                                 cname = status + cname;
4639                                         std::deque<TreeServer*> list;
4640                                         Utils->GetListOfServersForChannel(c,list);
4641                                         unsigned int ucount = list.size();
4642                                         for (unsigned int i = 0; i < ucount; i++)
4643                                         {
4644                                                 TreeSocket* Sock = list[i]->GetSocket();
4645                                                 if (Sock)
4646                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4647                                         }
4648                                 }
4649                         }
4650                 }
4651                 else if (target_type == TYPE_SERVER)
4652                 {
4653                         if (IS_LOCAL(user))
4654                         {
4655                                 char* target = (char*)dest;
4656                                 std::deque<std::string> par;
4657                                 par.push_back(target);
4658                                 par.push_back(":"+text);
4659                                 Utils->DoOneToMany(user->nick,"PRIVMSG",par);
4660                         }
4661                 }
4662         }
4663
4664         virtual void OnBackgroundTimer(time_t curtime)
4665         {
4666                 AutoConnectServers(curtime);
4667                 DoPingChecks(curtime);
4668         }
4669
4670         virtual void OnUserJoin(userrec* user, chanrec* channel)
4671         {
4672                 // Only do this for local users
4673                 if (IS_LOCAL(user))
4674                 {
4675                         std::deque<std::string> params;
4676                         params.clear();
4677                         params.push_back(channel->name);
4678                         // set up their permissions and the channel TS with FJOIN.
4679                         // All users are FJOINed now, because a module may specify
4680                         // new joining permissions for the user.
4681                         params.clear();
4682                         params.push_back(channel->name);
4683                         params.push_back(ConvToStr(channel->age));
4684                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4685                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4686                 }
4687         }
4688
4689         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4690         {
4691                 // only occurs for local clients
4692                 if (user->registered != REG_ALL)
4693                         return;
4694                 std::deque<std::string> params;
4695                 params.push_back(newhost);
4696                 Utils->DoOneToMany(user->nick,"FHOST",params);
4697         }
4698
4699         virtual void OnChangeName(userrec* user, const std::string &gecos)
4700         {
4701                 // only occurs for local clients
4702                 if (user->registered != REG_ALL)
4703                         return;
4704                 std::deque<std::string> params;
4705                 params.push_back(gecos);
4706                 Utils->DoOneToMany(user->nick,"FNAME",params);
4707         }
4708
4709         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4710         {
4711                 if (IS_LOCAL(user))
4712                 {
4713                         std::deque<std::string> params;
4714                         params.push_back(channel->name);
4715                         if (partmessage != "")
4716                                 params.push_back(":"+partmessage);
4717                         Utils->DoOneToMany(user->nick,"PART",params);
4718                 }
4719         }
4720
4721         virtual void OnUserConnect(userrec* user)
4722         {
4723                 char agestr[MAXBUF];
4724                 if (IS_LOCAL(user))
4725                 {
4726                         std::deque<std::string> params;
4727                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4728                         params.push_back(agestr);
4729                         params.push_back(user->nick);
4730                         params.push_back(user->host);
4731                         params.push_back(user->dhost);
4732                         params.push_back(user->ident);
4733                         params.push_back("+"+std::string(user->FormatModes()));
4734                         params.push_back(user->GetIPString());
4735                         params.push_back(":"+std::string(user->fullname));
4736                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4737
4738                         // User is Local, change needs to be reflected!
4739                         TreeServer* SourceServer = Utils->FindServer(user->server);
4740                         if (SourceServer)
4741                         {
4742                                 SourceServer->AddUserCount();
4743                         }
4744
4745                 }
4746         }
4747
4748         virtual void OnUserQuit(userrec* user, const std::string &reason)
4749         {
4750                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4751                 {
4752                         std::deque<std::string> params;
4753                         params.push_back(":"+reason);
4754                         Utils->DoOneToMany(user->nick,"QUIT",params);
4755                 }
4756                 // Regardless, We need to modify the user Counts..
4757                 TreeServer* SourceServer = Utils->FindServer(user->server);
4758                 if (SourceServer)
4759                 {
4760                         SourceServer->DelUserCount();
4761                 }
4762
4763         }
4764
4765         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4766         {
4767                 if (IS_LOCAL(user))
4768                 {
4769                         std::deque<std::string> params;
4770                         params.push_back(user->nick);
4771                         Utils->DoOneToMany(oldnick,"NICK",params);
4772                 }
4773         }
4774
4775         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4776         {
4777                 if ((source) && (IS_LOCAL(source)))
4778                 {
4779                         std::deque<std::string> params;
4780                         params.push_back(chan->name);
4781                         params.push_back(user->nick);
4782                         params.push_back(":"+reason);
4783                         Utils->DoOneToMany(source->nick,"KICK",params);
4784                 }
4785                 else if (!source)
4786                 {
4787                         std::deque<std::string> params;
4788                         params.push_back(chan->name);
4789                         params.push_back(user->nick);
4790                         params.push_back(":"+reason);
4791                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4792                 }
4793         }
4794
4795         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4796         {
4797                 std::deque<std::string> params;
4798                 params.push_back(dest->nick);
4799                 params.push_back(":"+reason);
4800                 Utils->DoOneToMany(source->nick,"KILL",params);
4801         }
4802
4803         virtual void OnRehash(const std::string &parameter)
4804         {
4805                 if (parameter != "")
4806                 {
4807                         std::deque<std::string> params;
4808                         params.push_back(parameter);
4809                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4810                         // check for self
4811                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4812                         {
4813                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4814                                 ServerInstance->RehashServer();
4815                         }
4816                 }
4817                 Utils->ReadConfiguration(false);
4818         }
4819
4820         // note: the protocol does not allow direct umode +o except
4821         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4822         // locally.
4823         virtual void OnOper(userrec* user, const std::string &opertype)
4824         {
4825                 if (IS_LOCAL(user))
4826                 {
4827                         std::deque<std::string> params;
4828                         params.push_back(opertype);
4829                         Utils->DoOneToMany(user->nick,"OPERTYPE",params);
4830                 }
4831         }
4832
4833         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4834         {
4835                 if (IS_LOCAL(source))
4836                 {
4837                         char type[8];
4838                         snprintf(type,8,"%cLINE",linetype);
4839                         std::string stype = type;
4840                         if (adding)
4841                         {
4842                                 char sduration[MAXBUF];
4843                                 snprintf(sduration,MAXBUF,"%ld",duration);
4844                                 std::deque<std::string> params;
4845                                 params.push_back(host);
4846                                 params.push_back(sduration);
4847                                 params.push_back(":"+reason);
4848                                 Utils->DoOneToMany(source->nick,stype,params);
4849                         }
4850                         else
4851                         {
4852                                 std::deque<std::string> params;
4853                                 params.push_back(host);
4854                                 Utils->DoOneToMany(source->nick,stype,params);
4855                         }
4856                 }
4857         }
4858
4859         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4860         {
4861                 OnLine(source,hostmask,true,'G',duration,reason);
4862         }
4863
4864         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4865         {
4866                 OnLine(source,ipmask,true,'Z',duration,reason);
4867         }
4868
4869         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4870         {
4871                 OnLine(source,nickmask,true,'Q',duration,reason);
4872         }
4873
4874         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4875         {
4876                 OnLine(source,hostmask,true,'E',duration,reason);
4877         }
4878
4879         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4880         {
4881                 OnLine(source,hostmask,false,'G',0,"");
4882         }
4883
4884         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4885         {
4886                 OnLine(source,ipmask,false,'Z',0,"");
4887         }
4888
4889         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4890         {
4891                 OnLine(source,nickmask,false,'Q',0,"");
4892         }
4893
4894         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4895         {
4896                 OnLine(source,hostmask,false,'E',0,"");
4897         }
4898
4899         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4900         {
4901                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4902                 {
4903                         if (target_type == TYPE_USER)
4904                         {
4905                                 userrec* u = (userrec*)dest;
4906                                 std::deque<std::string> params;
4907                                 params.push_back(u->nick);
4908                                 params.push_back(text);
4909                                 Utils->DoOneToMany(user->nick,"MODE",params);
4910                         }
4911                         else
4912                         {
4913                                 chanrec* c = (chanrec*)dest;
4914                                 std::deque<std::string> params;
4915                                 params.push_back(c->name);
4916                                 params.push_back(text);
4917                                 Utils->DoOneToMany(user->nick,"MODE",params);
4918                         }
4919                 }
4920         }
4921
4922         virtual void OnSetAway(userrec* user)
4923         {
4924                 if (IS_LOCAL(user))
4925                 {
4926                         std::deque<std::string> params;
4927                         params.push_back(":"+std::string(user->awaymsg));
4928                         Utils->DoOneToMany(user->nick,"AWAY",params);
4929                 }
4930         }
4931
4932         virtual void OnCancelAway(userrec* user)
4933         {
4934                 if (IS_LOCAL(user))
4935                 {
4936                         std::deque<std::string> params;
4937                         params.clear();
4938                         Utils->DoOneToMany(user->nick,"AWAY",params);
4939                 }
4940         }
4941
4942         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4943         {
4944                 TreeSocket* s = (TreeSocket*)opaque;
4945                 if (target)
4946                 {
4947                         if (target_type == TYPE_USER)
4948                         {
4949                                 userrec* u = (userrec*)target;
4950                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4951                         }
4952                         else
4953                         {
4954                                 chanrec* c = (chanrec*)target;
4955                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4956                         }
4957                 }
4958         }
4959
4960         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4961         {
4962                 TreeSocket* s = (TreeSocket*)opaque;
4963                 if (target)
4964                 {
4965                         if (target_type == TYPE_USER)
4966                         {
4967                                 userrec* u = (userrec*)target;
4968                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4969                         }
4970                         else if (target_type == TYPE_OTHER)
4971                         {
4972                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4973                         }
4974                         else if (target_type == TYPE_CHANNEL)
4975                         {
4976                                 chanrec* c = (chanrec*)target;
4977                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4978                         }
4979                 }
4980         }
4981
4982         virtual void OnEvent(Event* event)
4983         {
4984                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4985
4986                 if (event->GetEventID() == "send_metadata")
4987                 {
4988                         if (params->size() < 3)
4989                                 return;
4990                         (*params)[2] = ":" + (*params)[2];
4991                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4992                 }
4993                 else if (event->GetEventID() == "send_topic")
4994                 {
4995                         if (params->size() < 2)
4996                                 return;
4997                         (*params)[1] = ":" + (*params)[1];
4998                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
4999                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time()));
5000                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
5001                 }
5002                 else if (event->GetEventID() == "send_mode")
5003                 {
5004                         if (params->size() < 2)
5005                                 return;
5006                         // Insert the TS value of the object, either userrec or chanrec
5007                         time_t ourTS = 0;
5008                         userrec* a = ServerInstance->FindNick((*params)[0]);
5009                         if (a)
5010                         {
5011                                 ourTS = a->age;
5012                         }
5013                         else
5014                         {
5015                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
5016                                 if (a)
5017                                 {
5018                                         ourTS = a->age;
5019                                 }
5020                         }
5021                         params->insert(params->begin() + 1,ConvToStr(ourTS));
5022                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
5023                 }
5024         }
5025
5026         virtual ~ModuleSpanningTree()
5027         {
5028                 ServerInstance->Log(DEBUG,"Performing unload of spanningtree!");
5029                 /* This will also free the listeners */
5030                 delete Utils;
5031         }
5032
5033         virtual Version GetVersion()
5034         {
5035                 return Version(1,1,0,2,VF_VENDOR,API_VERSION);
5036         }
5037
5038         void Implements(char* List)
5039         {
5040                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
5041                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
5042                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
5043                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
5044                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
5045                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
5046                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
5047         }
5048
5049         /* It is IMPORTANT that m_spanningtree is the last module in the chain
5050          * so that any activity it sees is FINAL, e.g. we arent going to send out
5051          * a NICK message before m_cloaking has finished putting the +x on the user,
5052          * etc etc.
5053          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
5054          * the module call queue.
5055          */
5056         Priority Prioritize()
5057         {
5058                 return PRIORITY_LAST;
5059         }
5060 };
5061
5062 void SpanningTreeUtilities::DoFailOver(Link* x)
5063 {
5064         if (x->FailOver.length())
5065         {
5066                 if (x->FailOver == x->Name)
5067                 {
5068                         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());
5069                         return;
5070                 }
5071                 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
5072                 if (TryThisOne)
5073                 {
5074                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
5075                         Creator->ConnectServer(TryThisOne);
5076                 }
5077                 else
5078                 {
5079                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
5080                 }
5081         }
5082 }
5083
5084 Link* SpanningTreeUtilities::FindLink(const std::string& name)
5085 {
5086         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
5087         {
5088                 if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
5089                 {
5090                         return &(*x);
5091                 }
5092         }
5093         return NULL;
5094 }
5095
5096
5097 class ModuleSpanningTreeFactory : public ModuleFactory
5098 {
5099  public:
5100         ModuleSpanningTreeFactory()
5101         {
5102         }
5103
5104         ~ModuleSpanningTreeFactory()
5105         {
5106         }
5107
5108         virtual Module * CreateModule(InspIRCd* Me)
5109         {
5110                 return new ModuleSpanningTree(Me);
5111         }
5112
5113 };
5114
5115
5116 extern "C" void * init_module( void )
5117 {
5118         return new ModuleSpanningTreeFactory;
5119 }