src/modules/m_spanningtree.cpp

   1 /*   +------------------------------------+
   2  *   | Inspire Internet Relay Chat Daemon |
   3  *   +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                     E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* $ModDesc: Povides a spanning tree server link protocol */
  18
  19 #include "configreader.h"
  20 #include "users.h"
  21 #include "channels.h"
  22 #include "modules.h"
  23 #include "commands/cmd_whois.h"
  24 #include "commands/cmd_stats.h"
  25 #include "socket.h"
  26 #include "inspircd.h"
  27 #include "wildcard.h"
  28 #include "xline.h"
  29 #include "aes.h"
  30
  31 /** If you make a change which breaks the protocol, increment this.
  32  * If you  completely change the protocol, completely change the number.
  33  */
  34 const long ProtocolVersion = 1101;
  35
  36 /*
  37  * The server list in InspIRCd is maintained as two structures
  38  * which hold the data in different ways. Most of the time, we
  39  * want to very quicky obtain three pieces of information:
  40  *
  41  * (1) The information on a server
  42  * (2) The information on the server we must send data through
  43  *     to actually REACH the server we're after
  44  * (3) Potentially, the child/parent objects of this server
  45  *
  46  * The InspIRCd spanning protocol provides easy access to these
  47  * by storing the data firstly in a recursive structure, where
  48  * each item references its parent item, and a dynamic list
  49  * of child items, and another structure which stores the items
  50  * hashed, linearly. This means that if we want to find a server
  51  * by name quickly, we can look it up in the hash, avoiding
  52  * any O(n) lookups. If however, during a split or sync, we want
  53  * to apply an operation to a server, and any of its child objects
  54  * we can resort to recursion to walk the tree structure.
  55  * Any socket can have one of five states at any one time.
  56  * The LISTENER state indicates a socket which is listening
  57  * for connections. It cannot receive data itself, only incoming
  58  * sockets.
  59  * The CONNECTING state indicates an outbound socket which is
  60  * waiting to be writeable.
  61  * The WAIT_AUTH_1 state indicates the socket is outbound and
  62  * has successfully connected, but has not yet sent and received
  63  * SERVER strings.
  64  * The WAIT_AUTH_2 state indicates that the socket is inbound
  65  * (allocated by a LISTENER) but has not yet sent and received
  66  * SERVER strings.
  67  * The CONNECTED state represents a fully authorized, fully
  68  * connected server.
  69  */
  70 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  71
  72 /* Foward declarations */
  73 class TreeServer;
  74 class TreeSocket;
  75 class Link;
  76 class ModuleSpanningTree;
  77
  78 /* This hash_map holds the hash equivalent of the server
  79  * tree, used for rapid linear lookups.
  80  */
  81 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
  82
  83
  84 /** The Link class might as well be a struct,
  85  * but this is C++ and we don't believe in structs (!).
  86  * It holds the entire information of one <link>
  87  * tag from the main config file. We maintain a list
  88  * of them, and populate the list on rehash/load.
  89  */
  90 class Link : public classbase
  91 {
  92  public:
  93         irc::string Name;
  94         std::string IPAddr;
  95         int Port;
  96         std::string SendPass;
  97         std::string RecvPass;
  98         unsigned long AutoConnect;
  99         time_t NextConnectTime;
 100         std::string EncryptionKey;
 101         bool HiddenFromStats;
 102         std::string FailOver;
 103 };
 104
 105 /** Contains helper functions and variables for this module,
 106  * and keeps them out of the global namespace
 107  */
 108 class SpanningTreeUtilities
 109 {
 110  private:
 111         /** Creator server
 112          */
 113         InspIRCd* ServerInstance;
 114  public:
 115         /** Creator module
 116          */
 117         ModuleSpanningTree* Creator;
 118         /** Flatten links and /MAP for non-opers
 119          */
 120         bool FlatLinks;
 121         /** Hide U-Lined servers in /MAP and /LINKS
 122          */
 123         bool HideULines;
 124         /** Announce TS changes to channels on merge
 125          */
 126         bool AnnounceTSChange;
 127         /** Socket bindings for listening sockets
 128          */
 129         std::vector<TreeSocket*> Bindings;
 130         /** This variable represents the root of the server tree
 131          */
 132         TreeServer *TreeRoot;
 133         /** IPs allowed to link to us
 134          */
 135         std::vector<std::string> ValidIPs;
 136         /** Hash of currently connected servers by name
 137          */
 138         server_hash serverlist;
 139         /** Holds the data from the <link> tags in the conf
 140          */
 141         std::vector<Link> LinkBlocks;
 142
 143         /** Initialise utility class
 144          */
 145         SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* Creator);
 146         /** Destroy class and free listeners etc
 147          */
 148         ~SpanningTreeUtilities();
 149         /** Send a message from this server to one other local or remote
 150          */
 151         bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 152         /** Send a message from this server to all but one other, local or remote
 153          */
 154         bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 155         /** Send a message from this server to all but one other, local or remote
 156          */
 157         bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 158         /** Send a message from this server to all others
 159          */
 160         bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 161         /** Send a message from this server to all others
 162          */
 163         bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 164         /** Send a message from this server to all others, without doing any processing on the command (e.g. send it as-is with colons and all)
 165          */
 166         bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 167         /** Read the spanningtree module's tags from the config file
 168          */
 169         void ReadConfiguration(bool rebind);
 170         /** Add a server to the server list for GetListOfServersForChannel
 171          */
 172         void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list);
 173         /** Compile a list of servers which contain members of channel c
 174          */
 175         void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list);
 176         /** Find a server by name
 177          */
 178         TreeServer* FindServer(std::string ServerName);
 179         /** Find a route to a server by name
 180          */
 181         TreeServer* BestRouteTo(std::string ServerName);
 182         /** Find a server by glob mask
 183          */
 184         TreeServer* FindServerMask(std::string ServerName);
 185         /** Returns true if this is a server name we recognise
 186          */
 187         bool IsServer(std::string ServerName);
 188         /** Attempt to connect to the failover link of link x
 189          */
 190         void DoFailOver(Link* x);
 191         /** Find a link tag from a server name
 192          */
 193         Link* FindLink(const std::string& name);
 194 };
 195
 196
 197 /** Each server in the tree is represented by one class of
 198  * type TreeServer. A locally connected TreeServer can
 199  * have a class of type TreeSocket associated with it, for
 200  * remote servers, the TreeSocket entry will be NULL.
 201  * Each server also maintains a pointer to its parent
 202  * (NULL if this server is ours, at the top of the tree)
 203  * and a pointer to its "Route" (see the comments in the
 204  * constructors below), and also a dynamic list of pointers
 205  * to its children which can be iterated recursively
 206  * if required. Creating or deleting objects of type
 207  i* TreeServer automatically maintains the hash_map of
 208  * TreeServer items, deleting and inserting them as they
 209  * are created and destroyed.
 210  */
 211 class TreeServer : public classbase
 212 {
 213         InspIRCd* ServerInstance;               /* Creator */
 214         TreeServer* Parent;                     /* Parent entry */
 215         TreeServer* Route;                      /* Route entry */
 216         std::vector<TreeServer*> Children;      /* List of child objects */
 217         irc::string ServerName;                 /* Server's name */
 218         std::string ServerDesc;                 /* Server's description */
 219         std::string VersionString;              /* Version string or empty string */
 220         int UserCount;                          /* Not used in this version */
 221         int OperCount;                          /* Not used in this version */
 222         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 223         time_t NextPing;                        /* After this time, the server should be PINGed*/
 224         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 225         SpanningTreeUtilities* Utils;           /* Utility class */
 226
 227  public:
 228
 229         /** We don't use this constructor. Its a dummy, and won't cause any insertion
 230          * of the TreeServer into the hash_map. See below for the two we DO use.
 231          */
 232         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance) : ServerInstance(Instance), Utils(Util)
 233         {
 234                 Parent = NULL;
 235                 ServerName = "";
 236                 ServerDesc = "";
 237                 VersionString = "";
 238                 UserCount = OperCount = 0;
 239                 VersionString = ServerInstance->GetVersionString();
 240         }
 241
 242         /** We use this constructor only to create the 'root' item, Utils->TreeRoot, which
 243          * represents our own server. Therefore, it has no route, no parent, and
 244          * no socket associated with it. Its version string is our own local version.
 245          */
 246         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc), Utils(Util)
 247         {
 248                 Parent = NULL;
 249                 VersionString = "";
 250                 UserCount = OperCount = 0;
 251                 VersionString = ServerInstance->GetVersionString();
 252                 Route = NULL;
 253                 Socket = NULL; /* Fix by brain */
 254                 AddHashEntry();
 255         }
 256
 257         /** When we create a new server, we call this constructor to initialize it.
 258          * This constructor initializes the server's Route and Parent, and sets up
 259          * its ping counters so that it will be pinged one minute from now.
 260          */
 261         TreeServer(SpanningTreeUtilities* Util, InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 262                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock), Utils(Util)
 263         {
 264                 VersionString = "";
 265                 UserCount = OperCount = 0;
 266                 this->SetNextPingTime(time(NULL) + 60);
 267                 this->SetPingFlag();
 268
 269                 /* find the 'route' for this server (e.g. the one directly connected
 270                  * to the local server, which we can use to reach it)
 271                  *
 272                  * In the following example, consider we have just added a TreeServer
 273                  * class for server G on our network, of which we are server A.
 274                  * To route traffic to G (marked with a *) we must send the data to
 275                  * B (marked with a +) so this algorithm initializes the 'Route'
 276                  * value to point at whichever server traffic must be routed through
 277                  * to get here. If we were to try this algorithm with server B,
 278                  * the Route pointer would point at its own object ('this').
 279                  *
 280                  *              A
 281                  *             / \
 282                  *          + B   C
 283                  *           / \   \
 284                  *          D   E   F
 285                  *         /         \
 286                  *      * G           H
 287                  *
 288                  * We only run this algorithm when a server is created, as
 289                  * the routes remain constant while ever the server exists, and
 290                  * do not need to be re-calculated.
 291                  */
 292
 293                 Route = Above;
 294                 if (Route == Utils->TreeRoot)
 295                 {
 296                         Route = this;
 297                 }
 298                 else
 299                 {
 300                         while (this->Route->GetParent() != Utils->TreeRoot)
 301                         {
 302                                 this->Route = Route->GetParent();
 303                         }
 304                 }
 305
 306                 /* Because recursive code is slow and takes a lot of resources,
 307                  * we store two representations of the server tree. The first
 308                  * is a recursive structure where each server references its
 309                  * children and its parent, which is used for netbursts and
 310                  * netsplits to dump the whole dataset to the other server,
 311                  * and the second is used for very fast lookups when routing
 312                  * messages and is instead a hash_map, where each item can
 313                  * be referenced by its server name. The AddHashEntry()
 314                  * call below automatically inserts each TreeServer class
 315                  * into the hash_map as it is created. There is a similar
 316                  * maintainance call in the destructor to tidy up deleted
 317                  * servers.
 318                  */
 319
 320                 this->AddHashEntry();
 321         }
 322
 323         int QuitUsers(const std::string &reason)
 324         {
 325                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 326                 const char* reason_s = reason.c_str();
 327                 std::vector<userrec*> time_to_die;
 328                 for (user_hash::iterator n = ServerInstance->clientlist.begin(); n != ServerInstance->clientlist.end(); n++)
 329                 {
 330                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 331                         {
 332                                 time_to_die.push_back(n->second);
 333                         }
 334                 }
 335                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 336                 {
 337                         userrec* a = (userrec*)*n;
 338                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 339                         if (!IS_LOCAL(a))
 340                                 userrec::QuitUser(ServerInstance,a,reason_s);
 341                 }
 342                 return time_to_die.size();
 343         }
 344
 345         /** This method is used to add the structure to the
 346          * hash_map for linear searches. It is only called
 347          * by the constructors.
 348          */
 349         void AddHashEntry()
 350         {
 351                 server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str());
 352                 if (iter == Utils->serverlist.end())
 353                         Utils->serverlist[this->ServerName.c_str()] = this;
 354         }
 355
 356         /** This method removes the reference to this object
 357          * from the hash_map which is used for linear searches.
 358          * It is only called by the default destructor.
 359          */
 360         void DelHashEntry()
 361         {
 362                 server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str());
 363                 if (iter != Utils->serverlist.end())
 364                         Utils->serverlist.erase(iter);
 365         }
 366
 367         /** These accessors etc should be pretty self-
 368          * explanitory.
 369          */
 370         TreeServer* GetRoute()
 371         {
 372                 return Route;
 373         }
 374
 375         std::string GetName()
 376         {
 377                 return ServerName.c_str();
 378         }
 379
 380         std::string GetDesc()
 381         {
 382                 return ServerDesc;
 383         }
 384
 385         std::string GetVersion()
 386         {
 387                 return VersionString;
 388         }
 389
 390         void SetNextPingTime(time_t t)
 391         {
 392                 this->NextPing = t;
 393                 LastPingWasGood = false;
 394         }
 395
 396         time_t NextPingTime()
 397         {
 398                 return NextPing;
 399         }
 400
 401         bool AnsweredLastPing()
 402         {
 403                 return LastPingWasGood;
 404         }
 405
 406         void SetPingFlag()
 407         {
 408                 LastPingWasGood = true;
 409         }
 410
 411         int GetUserCount()
 412         {
 413                 return UserCount;
 414         }
 415
 416         void AddUserCount()
 417         {
 418                 UserCount++;
 419         }
 420
 421         void DelUserCount()
 422         {
 423                 UserCount--;
 424         }
 425
 426         int GetOperCount()
 427         {
 428                 return OperCount;
 429         }
 430
 431         TreeSocket* GetSocket()
 432         {
 433                 return Socket;
 434         }
 435
 436         TreeServer* GetParent()
 437         {
 438                 return Parent;
 439         }
 440
 441         void SetVersion(std::string Version)
 442         {
 443                 VersionString = Version;
 444         }
 445
 446         unsigned int ChildCount()
 447         {
 448                 return Children.size();
 449         }
 450
 451         TreeServer* GetChild(unsigned int n)
 452         {
 453                 if (n < Children.size())
 454                 {
 455                         /* Make sure they  cant request
 456                          * an out-of-range object. After
 457                          * all we know what these programmer
 458                          * types are like *grin*.
 459                          */
 460                         return Children[n];
 461                 }
 462                 else
 463                 {
 464                         return NULL;
 465                 }
 466         }
 467
 468         void AddChild(TreeServer* Child)
 469         {
 470                 Children.push_back(Child);
 471         }
 472
 473         bool DelChild(TreeServer* Child)
 474         {
 475                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 476                 {
 477                         if (*a == Child)
 478                         {
 479                                 Children.erase(a);
 480                                 return true;
 481                         }
 482                 }
 483                 return false;
 484         }
 485
 486         /** Removes child nodes of this node, and of that node, etc etc.
 487          * This is used during netsplits to automatically tidy up the
 488          * server tree. It is slow, we don't use it for much else.
 489          */
 490         bool Tidy()
 491         {
 492                 bool stillchildren = true;
 493                 while (stillchildren)
 494                 {
 495                         stillchildren = false;
 496                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 497                         {
 498                                 TreeServer* s = (TreeServer*)*a;
 499                                 s->Tidy();
 500                                 Children.erase(a);
 501                                 DELETE(s);
 502                                 stillchildren = true;
 503                                 break;
 504                         }
 505                 }
 506                 return true;
 507         }
 508
 509         ~TreeServer()
 510         {
 511                 /* We'd better tidy up after ourselves, eh? */
 512                 this->DelHashEntry();
 513         }
 514 };
 515
 516 /** Yay for fast searches!
 517  * This is hundreds of times faster than recursion
 518  * or even scanning a linked list, especially when
 519  * there are more than a few servers to deal with.
 520  * (read as: lots).
 521  */
 522 TreeServer* SpanningTreeUtilities::FindServer(std::string ServerName)
 523 {
 524         server_hash::iterator iter;
 525         iter = serverlist.find(ServerName.c_str());
 526         if (iter != serverlist.end())
 527         {
 528                 return iter->second;
 529         }
 530         else
 531         {
 532                 return NULL;
 533         }
 534 }
 535
 536 /** Returns the locally connected server we must route a
 537  * message through to reach server 'ServerName'. This
 538  * only applies to one-to-one and not one-to-many routing.
 539  * See the comments for the constructor of TreeServer
 540  * for more details.
 541  */
 542 TreeServer* SpanningTreeUtilities::BestRouteTo(std::string ServerName)
 543 {
 544         if (ServerName.c_str() == TreeRoot->GetName())
 545                 return NULL;
 546         TreeServer* Found = FindServer(ServerName);
 547         if (Found)
 548         {
 549                 return Found->GetRoute();
 550         }
 551         else
 552         {
 553                 return NULL;
 554         }
 555 }
 556
 557 /** Find the first server matching a given glob mask.
 558  * Theres no find-using-glob method of hash_map [awwww :-(]
 559  * so instead, we iterate over the list using an iterator
 560  * and match each one until we get a hit. Yes its slow,
 561  * deal with it.
 562  */
 563 TreeServer* SpanningTreeUtilities::FindServerMask(std::string ServerName)
 564 {
 565         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 566         {
 567                 if (match(i->first.c_str(),ServerName.c_str()))
 568                         return i->second;
 569         }
 570         return NULL;
 571 }
 572
 573 /* A convenient wrapper that returns true if a server exists */
 574 bool SpanningTreeUtilities::IsServer(std::string ServerName)
 575 {
 576         return (FindServer(ServerName) != NULL);
 577 }
 578
 579
 580 /** Handle /RCONNECT
 581  */
 582 class cmd_rconnect : public command_t
 583 {
 584         Module* Creator;
 585         SpanningTreeUtilities* Utils;
 586  public:
 587         cmd_rconnect (InspIRCd* Instance, Module* Callback, SpanningTreeUtilities* Util) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback), Utils(Util)
 588         {
 589                 this->source = "m_spanningtree.so";
 590                 syntax = "<remote-server-mask> <servermask>";
 591         }
 592
 593         CmdResult Handle (const char** parameters, int pcnt, userrec *user)
 594         {
 595                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 596                 /* Is this aimed at our server? */
 597                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 598                 {
 599                         /* Yes, initiate the given connect */
 600                         ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 601                         const char* para[1];
 602                         para[0] = parameters[1];
 603                         std::string original_command = std::string("CONNECT ") + parameters[1];
 604                         Creator->OnPreCommand("CONNECT", para, 1, user, true, original_command);
 605
 606                         return CMD_SUCCESS;
 607                 }
 608
 609                 return CMD_FAILURE;
 610         }
 611 };
 612
 613
 614
 615 /** Every SERVER connection inbound or outbound is represented by
 616  * an object of type TreeSocket.
 617  * TreeSockets, being inherited from InspSocket, can be tied into
 618  * the core socket engine, and we cn therefore receive activity events
 619  * for them, just like activex objects on speed. (yes really, that
 620  * is a technical term!) Each of these which relates to a locally
 621  * connected server is assocated with it, by hooking it onto a
 622  * TreeSocket class using its constructor. In this way, we can
 623  * maintain a list of servers, some of which are directly connected,
 624  * some of which are not.
 625  */
 626 class TreeSocket : public InspSocket
 627 {
 628         SpanningTreeUtilities* Utils;
 629         std::string myhost;
 630         std::string in_buffer;
 631         ServerState LinkState;
 632         std::string InboundServerName;
 633         std::string InboundDescription;
 634         int num_lost_users;
 635         int num_lost_servers;
 636         time_t NextPing;
 637         bool LastPingWasGood;
 638         bool bursting;
 639         AES* ctx_in;
 640         AES* ctx_out;
 641         unsigned int keylength;
 642         std::string ModuleList;
 643         std::map<std::string,std::string> CapKeys;
 644
 645  public:
 646
 647         /** Because most of the I/O gubbins are encapsulated within
 648          * InspSocket, we just call the superclass constructor for
 649          * most of the action, and append a few of our own values
 650          * to it.
 651          */
 652         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime)
 653                 : InspSocket(SI, host, port, listening, maxtime), Utils(Util)
 654         {
 655                 myhost = host;
 656                 this->LinkState = LISTENER;
 657                 this->ctx_in = NULL;
 658                 this->ctx_out = NULL;
 659         }
 660
 661         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 662                 : InspSocket(SI, host, port, listening, maxtime), Utils(Util)
 663         {
 664                 myhost = ServerName;
 665                 this->LinkState = CONNECTING;
 666                 this->ctx_in = NULL;
 667                 this->ctx_out = NULL;
 668         }
 669
 670         /** When a listening socket gives us a new file descriptor,
 671          * we must associate it with a socket without creating a new
 672          * connection. This constructor is used for this purpose.
 673          */
 674         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip)
 675                 : InspSocket(SI, newfd, ip), Utils(Util)
 676         {
 677                 this->LinkState = WAIT_AUTH_1;
 678                 this->ctx_in = NULL;
 679                 this->ctx_out = NULL;
 680                 this->SendCapabilities();
 681         }
 682
 683         ~TreeSocket()
 684         {
 685                 if (ctx_in)
 686                         DELETE(ctx_in);
 687                 if (ctx_out)
 688                         DELETE(ctx_out);
 689         }
 690
 691         void InitAES(std::string key,std::string SName)
 692         {
 693                 if (key == "")
 694                         return;
 695
 696                 ctx_in = new AES();
 697                 ctx_out = new AES();
 698                 Instance->Log(DEBUG,"Initialized AES key %s",key.c_str());
 699                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 700                 keylength = key.length();
 701                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 702                 {
 703                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 704                         Instance->Log(DEBUG,"Key length not 16, 24 or 32 characters!");
 705                 }
 706                 else
 707                 {
 708                         if (this->GetState() != I_ERROR)
 709                         {
 710                                 this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 711                                 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\
 712                                         \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);
 713                                 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\
 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                         }
 716                 }
 717         }
 718
 719         /** When an outbound connection finishes connecting, we receive
 720          * this event, and must send our SERVER string to the other
 721          * side. If the other side is happy, as outlined in the server
 722          * to server docs on the inspircd.org site, the other side
 723          * will then send back its own server string.
 724          */
 725         virtual bool OnConnected()
 726         {
 727                 if (this->LinkState == CONNECTING)
 728                 {
 729                         /* we do not need to change state here. */
 730                         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 731                         {
 732                                 if (x->Name == this->myhost)
 733                                 {
 734                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
 735                                         this->SendCapabilities();
 736                                         if (x->EncryptionKey != "")
 737                                         {
 738                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 739                                                 {
 740                                                         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.");
 741                                                 }
 742                                                 else
 743                                                 {
 744                                                         this->WriteLine(std::string("AES ")+this->Instance->Config->ServerName);
 745                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 746                                                 }
 747                                         }
 748                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 749                                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 750                                         return true;
 751                                 }
 752                         }
 753                 }
 754                 /* There is a (remote) chance that between the /CONNECT and the connection
 755                  * being accepted, some muppet has removed the <link> block and rehashed.
 756                  * If that happens the connection hangs here until it's closed. Unlikely
 757                  * and rather harmless.
 758                  */
 759                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 760                 return true;
 761         }
 762
 763         virtual void OnError(InspSocketError e)
 764         {
 765                 /* We don't handle this method, because all our
 766                  * dirty work is done in OnClose() (see below)
 767                  * which is still called on error conditions too.
 768                  */
 769                 if (e == I_ERR_CONNECT)
 770                 {
 771                         this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
 772                         Link* MyLink = Utils->FindLink(myhost);
 773                         if (MyLink)
 774                                 Utils->DoFailOver(MyLink);
 775                 }
 776         }
 777
 778         virtual int OnDisconnect()
 779         {
 780                 /* For the same reason as above, we don't
 781                  * handle OnDisconnect()
 782                  */
 783                 return true;
 784         }
 785
 786         /** Recursively send the server tree with distances as hops.
 787          * This is used during network burst to inform the other server
 788          * (and any of ITS servers too) of what servers we know about.
 789          * If at any point any of these servers already exist on the other
 790          * end, our connection may be terminated. The hopcounts given
 791          * by this function are relative, this doesn't matter so long as
 792          * they are all >1, as all the remote servers re-calculate them
 793          * to be relative too, with themselves as hop 0.
 794          */
 795         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 796         {
 797                 char command[1024];
 798                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 799                 {
 800                         TreeServer* recursive_server = Current->GetChild(q);
 801                         if (recursive_server != s)
 802                         {
 803                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 804                                 this->WriteLine(command);
 805                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 806                                 /* down to next level */
 807                                 this->SendServers(recursive_server, s, hops+1);
 808                         }
 809                 }
 810         }
 811
 812         std::string MyCapabilities()
 813         {
 814                 std::vector<std::string> modlist;
 815                 std::string capabilities = "";
 816
 817                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 818                 {
 819                         if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
 820                                 modlist.push_back(this->Instance->Config->module_names[i]);
 821                 }
 822                 sort(modlist.begin(),modlist.end());
 823                 for (unsigned int i = 0; i < modlist.size(); i++)
 824                 {
 825                         if (i)
 826                                 capabilities = capabilities + ",";
 827                         capabilities = capabilities + modlist[i];
 828                 }
 829                 return capabilities;
 830         }
 831
 832         void SendCapabilities()
 833         {
 834                 irc::commasepstream modulelist(MyCapabilities());
 835
 836                 this->WriteLine("CAPAB START");
 837
 838                 /* Send module names, split at 509 length */
 839                 std::string item = "*";
 840                 std::string line = "CAPAB MODULES ";
 841                 while ((item = modulelist.GetToken()) != "")
 842                 {
 843                         if (line.length() + item.length() + 1 > 509)
 844                         {
 845                                 this->WriteLine(line);
 846                                 line = "CAPAB MODULES ";
 847                         }
 848
 849                         if (line != "CAPAB MODULES ")
 850                                 line.append(",");
 851
 852                         line.append(item);
 853                 }
 854                 if (line != "CAPAB MODULES ")
 855                         this->WriteLine(line);
 856
 857                 int ip6 = 0;
 858                 int ip6support = 0;
 859 #ifdef IPV6
 860                 ip6 = 1;
 861 #endif
 862 #ifdef SUPPORT_IP6LINKS
 863                 ip6support = 1;
 864 #endif
 865                 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));
 866
 867                 this->WriteLine("CAPAB END");
 868         }
 869
 870         /* Check a comma seperated list for an item */
 871         bool HasItem(const std::string &list, const std::string &item)
 872         {
 873                 irc::commasepstream seplist(list);
 874
 875                 std::string item2 = "*";
 876                 while ((item2 = seplist.GetToken()) != "")
 877                 {
 878                         if (item2 == item)
 879                                 return true;
 880                 }
 881
 882                 return false;
 883         }
 884
 885         /* Isolate and return the elements that are different between two comma seperated lists */
 886         std::string ListDifference(const std::string &one, const std::string &two)
 887         {
 888                 irc::commasepstream list_one(one);
 889                 std::string item = "*";
 890                 std::string result = "";
 891                 while ((item = list_one.GetToken()) != "")
 892                 {
 893                         if (!HasItem(two, item))
 894                         {
 895                                 result.append(" ");
 896                                 result.append(item);
 897                         }
 898                 }
 899                 return result;
 900         }
 901
 902         bool Capab(std::deque<std::string> params)
 903         {
 904                 if (params.size() < 1)
 905                 {
 906                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 907                         return false;
 908                 }
 909
 910                 if (params[0] == "START")
 911                 {
 912                         this->ModuleList = "";
 913                         this->CapKeys.clear();
 914                 }
 915                 else if (params[0] == "END")
 916                 {
 917                         std::string reason = "";
 918                         int ip6support = 0;
 919 #ifdef SUPPORT_IP6LINKS
 920                         ip6support = 1;
 921 #endif
 922                         /* Compare ModuleList and check CapKeys...
 923                          * Maybe this could be tidier? -- Brain
 924                          */
 925                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 926                         {
 927                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 928                                 if (!diff.length())
 929                                 {
 930                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 931                                 }
 932                                 else
 933                                 {
 934                                         diff = "this server:" + diff;
 935                                 }
 936                                 if (diff.length() == 12)
 937                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 938                                 else
 939                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 940                         }
 941
 942                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 943                                 reason = "We don't both support linking to IPV6 servers";
 944
 945                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 946                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 947
 948                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 949                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 950
 951                         if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
 952                         {
 953                                 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
 954                                 {
 955                                         reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
 956                                 }
 957                                 else
 958                                 {
 959                                         reason = "Protocol version not specified";
 960                                 }
 961                         }
 962
 963                         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))))
 964                                 reason = "We don't both have halfop support enabled/disabled identically";
 965
 966                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 967                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 968
 969                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 970                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 971
 972                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 973                                 reason = "Maximum modes per line differ or remote modes per line not specified";
 974
 975                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 976                                 reason = "Maximum quit lengths differ or remote quit length not specified";
 977
 978                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 979                                 reason = "Maximum topic lengths differ or remote topic length not specified";
 980
 981                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
 982                                 reason = "Maximum kick lengths differ or remote kick length not specified";
 983
 984                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
 985                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
 986
 987                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
 988                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
 989
 990                         if (reason.length())
 991                         {
 992                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
 993                                 return false;
 994                         }
 995                 }
 996                 else if ((params[0] == "MODULES") && (params.size() == 2))
 997                 {
 998                         if (!this->ModuleList.length())
 999                         {
1000                                 this->ModuleList.append(params[1]);
1001                         }
1002                         else
1003                         {
1004                                 this->ModuleList.append(",");
1005                                 this->ModuleList.append(params[1]);
1006                         }
1007                 }
1008                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
1009                 {
1010                         irc::tokenstream capabs(params[1]);
1011                         std::string item = "*";
1012                         while ((item = capabs.GetToken()) != "")
1013                         {
1014                                 /* Process each key/value pair */
1015                                 std::string::size_type equals = item.rfind('=');
1016                                 if (equals != std::string::npos)
1017                                 {
1018                                         std::string var = item.substr(0, equals);
1019                                         std::string value = item.substr(equals+1, item.length());
1020                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1021                                         CapKeys[var] = value;
1022                                 }
1023                         }
1024                 }
1025
1026                 return true;
1027         }
1028
1029         /** This function forces this server to quit, removing this server
1030          * and any users on it (and servers and users below that, etc etc).
1031          * It's very slow and pretty clunky, but luckily unless your network
1032          * is having a REAL bad hair day, this function shouldnt be called
1033          * too many times a month ;-)
1034          */
1035         void SquitServer(std::string &from, TreeServer* Current)
1036         {
1037                 /* recursively squit the servers attached to 'Current'.
1038                  * We're going backwards so we don't remove users
1039                  * while we still need them ;)
1040                  */
1041                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1042                 {
1043                         TreeServer* recursive_server = Current->GetChild(q);
1044                         this->SquitServer(from,recursive_server);
1045                 }
1046                 /* Now we've whacked the kids, whack self */
1047                 num_lost_servers++;
1048                 num_lost_users += Current->QuitUsers(from);
1049         }
1050
1051         /** This is a wrapper function for SquitServer above, which
1052          * does some validation first and passes on the SQUIT to all
1053          * other remaining servers.
1054          */
1055         void Squit(TreeServer* Current,std::string reason)
1056         {
1057                 if ((Current) && (Current != Utils->TreeRoot))
1058                 {
1059                         std::deque<std::string> params;
1060                         params.push_back(Current->GetName());
1061                         params.push_back(":"+reason);
1062                         Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1063                         if (Current->GetParent() == Utils->TreeRoot)
1064                         {
1065                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1066                         }
1067                         else
1068                         {
1069                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1070                         }
1071                         num_lost_servers = 0;
1072                         num_lost_users = 0;
1073                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1074                         SquitServer(from, Current);
1075                         Current->Tidy();
1076                         Current->GetParent()->DelChild(Current);
1077                         DELETE(Current);
1078                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1079                 }
1080                 else
1081                 {
1082                         Instance->Log(DEFAULT,"Squit from unknown server");
1083                 }
1084         }
1085
1086         /** FMODE command - server mode with timestamp checks */
1087         bool ForceMode(std::string source, std::deque<std::string> &params)
1088         {
1089                 /* Chances are this is a 1.0 FMODE without TS */
1090                 if (params.size() < 3)
1091                 {
1092                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
1093                         return false;
1094                 }
1095
1096                 bool smode = false;
1097                 std::string sourceserv;
1098
1099                 /* Are we dealing with an FMODE from a user, or from a server? */
1100                 userrec* who = this->Instance->FindNick(source);
1101                 if (who)
1102                 {
1103                         /* FMODE from a user, set sourceserv to the users server name */
1104                         sourceserv = who->server;
1105                 }
1106                 else
1107                 {
1108                         /* FMODE from a server, create a fake user to receive mode feedback */
1109                         who = new userrec(this->Instance);
1110                         who->SetFd(FD_MAGIC_NUMBER);
1111                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1112                         sourceserv = source;    /* Set sourceserv to the actual source string */
1113                 }
1114                 const char* modelist[64];
1115                 time_t TS = 0;
1116                 int n = 0;
1117                 memset(&modelist,0,sizeof(modelist));
1118                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1119                 {
1120                         if (q == 1)
1121                         {
1122                                 /* The timestamp is in this position.
1123                                  * We don't want to pass that up to the
1124                                  * server->client protocol!
1125                                  */
1126                                 TS = atoi(params[q].c_str());
1127                         }
1128                         else
1129                         {
1130                                 /* Everything else is fine to append to the modelist */
1131                                 modelist[n++] = params[q].c_str();
1132                         }
1133
1134                 }
1135                 /* Extract the TS value of the object, either userrec or chanrec */
1136                 userrec* dst = this->Instance->FindNick(params[0]);
1137                 chanrec* chan = NULL;
1138                 time_t ourTS = 0;
1139                 if (dst)
1140                 {
1141                         ourTS = dst->age;
1142                 }
1143                 else
1144                 {
1145                         chan = this->Instance->FindChan(params[0]);
1146                         if (chan)
1147                         {
1148                                 ourTS = chan->age;
1149                         }
1150                         else
1151                                 /* Oops, channel doesnt exist! */
1152                                 return true;
1153                 }
1154
1155                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1156                  * with parameters.
1157                  */
1158                 if (TS == ourTS)
1159                 {
1160                         Instance->Log(DEBUG,"Entering TS equality check");
1161                         ModeHandler* mh = NULL;
1162                         unsigned long paramptr = 3;
1163                         std::string to_bounce = "";
1164                         std::string to_keep = "";
1165                         std::vector<std::string> params_to_keep;
1166                         std::string params_to_bounce = "";
1167                         bool adding = true;
1168                         char cur_change = 1;
1169                         char old_change = 0;
1170                         char old_bounce_change = 0;
1171                         /* Merge modes, basically do special stuff to mode with params */
1172                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1173                         {
1174                                 switch (*x)
1175                                 {
1176                                         case '-':
1177                                                 adding = false;
1178                                         break;
1179                                         case '+':
1180                                                 adding = true;
1181                                         break;
1182                                         default:
1183                                                 if (adding)
1184                                                 {
1185                                                         /* We only care about whats being set,
1186                                                          * not whats being unset
1187                                                          */
1188                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1189
1190                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1191                                                         {
1192                                                                 /* We only want to do special things to
1193                                                                  * modes with parameters, we are going to rewrite
1194                                                                  * those parameters
1195                                                                  */
1196                                                                 ModePair ret;
1197                                                                 adding ? cur_change = '+' : cur_change = '-';
1198
1199                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1200
1201                                                                 /* The mode is set here, check which we should keep */
1202                                                                 if (ret.first)
1203                                                                 {
1204                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1205
1206                                                                         if (which_to_keep == true)
1207                                                                         {
1208                                                                                 /* Keep ours, bounce theirs:
1209                                                                                  * Send back ours to them and
1210                                                                                  * drop their mode changs
1211                                                                                  */
1212                                                                                 adding ? cur_change = '+' : cur_change = '-';
1213                                                                                 if (cur_change != old_bounce_change)
1214                                                                                         to_bounce += cur_change;
1215                                                                                 to_bounce += *x;
1216                                                                                 old_bounce_change = cur_change;
1217
1218                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1219                                                                                         params_to_bounce.append(" ").append(ret.second);
1220                                                                         }
1221                                                                         else
1222                                                                         {
1223                                                                                 /* Keep theirs: Accept their mode change,
1224                                                                                  * do nothing else
1225                                                                                  */
1226                                                                                 adding ? cur_change = '+' : cur_change = '-';
1227                                                                                 if (cur_change != old_change)
1228                                                                                         to_keep += cur_change;
1229                                                                                 to_keep += *x;
1230                                                                                 old_change = cur_change;
1231
1232                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1233                                                                                         params_to_keep.push_back(params[paramptr]);
1234                                                                         }
1235                                                                 }
1236                                                                 else
1237                                                                 {
1238                                                                         /* Mode isnt set here, we want it */
1239                                                                         adding ? cur_change = '+' : cur_change = '-';
1240                                                                         if (cur_change != old_change)
1241                                                                                 to_keep += cur_change;
1242                                                                         to_keep += *x;
1243                                                                         old_change = cur_change;
1244
1245                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1246                                                                                 params_to_keep.push_back(params[paramptr]);
1247                                                                 }
1248
1249                                                                 paramptr++;
1250                                                         }
1251                                                         else
1252                                                         {
1253                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1254
1255                                                                 if (mh)
1256                                                                 {
1257                                                                         adding ? cur_change = '+' : cur_change = '-';
1258
1259                                                                         /* Just keep this, safe to merge with no checks
1260                                                                          * it has no parameters
1261                                                                          */
1262
1263                                                                         if (cur_change != old_change)
1264                                                                                 to_keep += cur_change;
1265                                                                         to_keep += *x;
1266                                                                         old_change = cur_change;
1267
1268                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1269                                                                         {
1270                                                                                 Instance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1271                                                                                 params_to_keep.push_back(params[paramptr++]);
1272                                                                         }
1273                                                                 }
1274                                                         }
1275                                                 }
1276                                                 else
1277                                                 {
1278                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1279
1280                                                         if (mh)
1281                                                         {
1282                                                                 /* Taking a mode away */
1283                                                                 adding ? cur_change = '+' : cur_change = '-';
1284
1285                                                                 if (cur_change != old_change)
1286                                                                         to_keep += cur_change;
1287                                                                 to_keep += *x;
1288                                                                 old_change = cur_change;
1289
1290                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1291                                                                         params_to_keep.push_back(params[paramptr++]);
1292                                                         }
1293                                                 }
1294                                         break;
1295                                 }
1296                         }
1297
1298                         if (to_bounce.length())
1299                         {
1300                                 std::deque<std::string> newparams;
1301                                 newparams.push_back(params[0]);
1302                                 newparams.push_back(ConvToStr(ourTS));
1303                                 newparams.push_back(to_bounce+params_to_bounce);
1304                                 Instance->Log(DEBUG,"BOUNCE BACK: %s",(to_bounce+params_to_bounce).c_str());
1305                                 Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1306                         }
1307
1308                         if (to_keep.length())
1309                         {
1310                                 unsigned int n = 2;
1311                                 unsigned int q = 0;
1312                                 modelist[0] = params[0].c_str();
1313                                 modelist[1] = to_keep.c_str();
1314
1315                                 if (params_to_keep.size() > 0)
1316                                 {
1317                                         for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
1318                                         {
1319                                                 Instance->Log(DEBUG,"KEEP Item %d of %d: %s", q, params_to_keep.size(), params_to_keep[q].c_str());
1320                                                 modelist[n++] = params_to_keep[q].c_str();
1321                                         }
1322                                 }
1323
1324                                 if (smode)
1325                                 {
1326                                         Instance->Log(DEBUG,"Send mode");
1327                                         this->Instance->SendMode(modelist, n, who);
1328                                 }
1329                                 else
1330                                 {
1331                                         Instance->Log(DEBUG,"Send mode client");
1332                                         this->Instance->CallCommandHandler("MODE", modelist, n, who);
1333                                 }
1334
1335                                 /* HOT POTATO! PASS IT ON! */
1336                                 Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1337                         }
1338                 }
1339                 else
1340                 /* U-lined servers always win regardless of their TS */
1341                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1342                 {
1343                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1344                          * SHOULD accept it, if its clock is right.
1345                          *
1346                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1347                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1348                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1349                          *
1350                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1351                          * writing the code. It took me a while to come up with this solution.
1352                          *
1353                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1354                          */
1355
1356                         std::deque<std::string> newparams;      /* New parameter list we send back */
1357                         newparams.push_back(params[0]);         /* Target, user or channel */
1358                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1359                         newparams.push_back("");                /* This contains the mode string. For now
1360                                                                  * it's empty, we fill it below.
1361                                                                  */
1362
1363                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1364                          * set to avoid a desync here.
1365                          */
1366                         std::string modebounce = "";
1367                         bool adding = true;
1368                         unsigned int t = 3;
1369                         ModeHandler* mh = NULL;
1370                         char cur_change = 1;
1371                         char old_change = 0;
1372                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1373                         {
1374                                 /* Iterate over all mode chars in the sent set */
1375                                 switch (*x)
1376                                 {
1377                                         /* Adding or subtracting modes? */
1378                                         case '-':
1379                                                 adding = false;
1380                                         break;
1381                                         case '+':
1382                                                 adding = true;
1383                                         break;
1384                                         default:
1385                                                 /* Find the mode handler for this mode */
1386                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1387
1388                                                 /* Got a mode handler?
1389                                                  * This also prevents us bouncing modes we have no handler for.
1390                                                  */
1391                                                 if (mh)
1392                                                 {
1393                                                         ModePair ret;
1394                                                         std::string p = "";
1395
1396                                                         /* Does the mode require a parameter right now?
1397                                                          * If it does, fetch it if we can
1398                                                          */
1399                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1400                                                                 p = params[t++];
1401
1402                                                         /* Call the ModeSet method to determine if its set with the
1403                                                          * given parameter here or not.
1404                                                          */
1405                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1406
1407                                                         /* XXX: Really. Dont ask.
1408                                                          * Determine from if its set combined with what the current
1409                                                          * 'state' is (adding or not) as to wether we should 'invert'
1410                                                          * or 'reinforce' the mode change
1411                                                          */
1412                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1413
1414                                                         /* Quickly determine if we have 'flipped' from + to -,
1415                                                          * or - to +, to prevent unneccessary +/- chars in the
1416                                                          * output string that waste bandwidth
1417                                                          */
1418                                                         if (cur_change != old_change)
1419                                                                 modebounce += cur_change;
1420                                                         old_change = cur_change;
1421
1422                                                         /* Add the mode character to the output string */
1423                                                         modebounce += mh->GetModeChar();
1424
1425                                                         /* We got a parameter back from ModeHandler::ModeSet,
1426                                                          * are we supposed to be sending one out right now?
1427                                                          */
1428                                                         if (ret.second.length())
1429                                                         {
1430                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1431                                                                         /* Yes we're supposed to be sending out
1432                                                                          * the parameter. Make sure it goes
1433                                                                          */
1434                                                                         newparams.push_back(ret.second);
1435                                                         }
1436
1437                                                 }
1438                                         break;
1439                                 }
1440                         }
1441
1442                         /* Update the parameters for FMODE with the new 'bounced' string */
1443                         newparams[2] = modebounce;
1444                         /* Only send it back the way it came, no need to send it anywhere else */
1445                         Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1446                         Instance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1447                 }
1448                 else
1449                 {
1450                         Instance->Log(DEBUG,"Allow modes, TS lower for sender");
1451                         /* The server was ulined, but something iffy is up with the TS.
1452                          * Sound the alarm bells!
1453                          */
1454                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1455                         {
1456                                 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());
1457                         }
1458                         /* Allow the mode, route it to either server or user command handling */
1459                         if (smode)
1460                                 this->Instance->SendMode(modelist,n,who);
1461                         else
1462                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1463
1464                         /* HOT POTATO! PASS IT ON! */
1465                         Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1466                 }
1467                 /* Are we supposed to free the userrec? */
1468                 if (smode)
1469                         DELETE(who);
1470
1471                 return true;
1472         }
1473
1474         /** FTOPIC command */
1475         bool ForceTopic(std::string source, std::deque<std::string> &params)
1476         {
1477                 if (params.size() != 4)
1478                         return true;
1479                 time_t ts = atoi(params[1].c_str());
1480                 std::string nsource = source;
1481
1482                 chanrec* c = this->Instance->FindChan(params[0]);
1483                 if (c)
1484                 {
1485                         if ((ts >= c->topicset) || (!*c->topic))
1486                         {
1487                                 std::string oldtopic = c->topic;
1488                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1489                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1490                                 c->topicset = ts;
1491                                 /* if the topic text is the same as the current topic,
1492                                  * dont bother to send the TOPIC command out, just silently
1493                                  * update the set time and set nick.
1494                                  */
1495                                 if (oldtopic != params[3])
1496                                 {
1497                                         userrec* user = this->Instance->FindNick(source);
1498                                         if (!user)
1499                                         {
1500                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1501                                         }
1502                                         else
1503                                         {
1504                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1505                                                 nsource = user->server;
1506                                         }
1507                                         /* all done, send it on its way */
1508                                         params[3] = ":" + params[3];
1509                                         Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
1510                                 }
1511                         }
1512
1513                 }
1514
1515                 return true;
1516         }
1517
1518         /** FJOIN, similar to TS6 SJOIN, but not quite. */
1519         bool ForceJoin(std::string source, std::deque<std::string> &params)
1520         {
1521                 /* 1.1 FJOIN works as follows:
1522                  *
1523                  * Each FJOIN is sent along with a timestamp, and the side with the lowest
1524                  * timestamp 'wins'. From this point on we will refer to this side as the
1525                  * winner. The side with the higher timestamp loses, from this point on we
1526                  * will call this side the loser or losing side. This should be familiar to
1527                  * anyone who's dealt with dreamforge or TS6 before.
1528                  *
1529                  * When two sides of a split heal and this occurs, the following things
1530                  * will happen:
1531                  *
1532                  * If the timestamps are exactly equal, both sides merge their privilages
1533                  * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
1534                  * re-created during a split, this is safe to do.
1535                  *
1536                  *
1537                  * If the timestamps are NOT equal, the losing side removes all privilage
1538                  * modes from all of its users that currently exist in the channel, before
1539                  * introducing new users into the channel which are listed in the FJOIN
1540                  * command's parameters. This means, all modes +ohv, and privilages added
1541                  * by modules, such as +qa. The losing side then LOWERS its timestamp value
1542                  * of the channel to match that of the winning side, and the modes of the
1543                  * users of the winning side are merged in with the losing side. The loser
1544                  * then sends out a set of FMODE commands which 'confirm' that it just
1545                  * removed all privilage modes from its existing users, which allows for
1546                  * services packages to still work correctly without needing to know the
1547                  * timestamping rules which InspIRCd follows. In TS6 servers this is always
1548                  * a problem, and services packages must contain code which explicitly
1549                  * behaves as TS6 does, removing ops from the losing side of a split where
1550                  * neccessary within its internal records, as this state information is
1551                  * not explicitly echoed out in that protocol.
1552                  *
1553                  * The winning side on the other hand will ignore all user modes from the
1554                  * losing side, so only its own modes get applied. Life is simple for those
1555                  * who succeed at internets. :-)
1556                  *
1557                  * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
1558                  * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
1559                  * you ask? Well, quite simply because we don't need to. They'll be sent
1560                  * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
1561                  * the losing side sends any modes for the channel which shouldnt win,
1562                  * they wont as their timestamp will be too high :-)
1563                  */
1564
1565                 if (params.size() < 3)
1566                         return true;
1567
1568                 char first[MAXBUF];             /* The first parameter of the mode command */
1569                 char modestring[MAXBUF];        /* The mode sequence (2nd parameter) of the mode command */
1570                 char* mode_users[127];          /* The values used by the mode command */
1571                 memset(&mode_users,0,sizeof(mode_users));       /* Initialize mode parameters */
1572                 mode_users[0] = first;          /* Set this up to be our on-stack value */
1573                 mode_users[1] = modestring;     /* Same here as above */
1574                 strcpy(modestring,"+");         /* Initialize the mode sequence to just '+' */
1575                 unsigned int modectr = 2;       /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */
1576
1577                 userrec* who = NULL;                    /* User we are currently checking */
1578                 std::string channel = params[0];        /* Channel name, as a string */
1579                 time_t TS = atoi(params[1].c_str());    /* Timestamp given to us for remote side */
1580
1581                 /* Try and find the channel */
1582                 chanrec* chan = this->Instance->FindChan(channel);
1583
1584                 /* Initialize channel name in the mode parameters */
1585                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1586
1587                 /* default TS is a high value, which if we dont have this
1588                  * channel will let the other side apply their modes.
1589                  */
1590                 time_t ourTS = time(NULL)+600;
1591
1592                 /* Does this channel exist? if it does, get its REAL timestamp */
1593                 if (chan)
1594                         ourTS = chan->age;
1595
1596                 /* In 1.1, if they have the newer channel, we immediately clear
1597                  * all status modes from our users. We then accept their modes.
1598                  * If WE have the newer channel its the other side's job to do this.
1599                  * Note that this causes the losing server to send out confirming
1600                  * FMODE lines.
1601                  */
1602                 if (ourTS > TS)
1603                 {
1604                         std::deque<std::string> param_list;
1605
1606                         if (chan)
1607                                 chan->age = TS;
1608
1609                         /* Lower the TS here */
1610                         if (Utils->AnnounceTSChange && chan)
1611                                 chan->WriteChannelWithServ(Instance->Config->ServerName,
1612                                 "TS for %s changed from %lu to %lu", chan->name, ourTS, TS);
1613                         ourTS = TS;
1614
1615                         param_list.push_back(channel);
1616                         /* Zap all the privilage modes on our side */
1617                         this->RemoveStatus(Instance->Config->ServerName, param_list);
1618                 }
1619
1620                 /* Put the final parameter of the FJOIN into a tokenstream ready to split it */
1621                 irc::tokenstream users(params[2]);
1622                 std::string item = "*";
1623
1624                 /* do this first, so our mode reversals are correctly received by other servers
1625                  * if there is a TS collision.
1626                  */
1627                 params[2] = ":" + params[2];
1628                 Utils->DoOneToAllButSender(source,"FJOIN",params,source);
1629
1630                 /* Now, process every 'prefixes,nick' pair */
1631                 while (item != "")
1632                 {
1633                         /* Find next user */
1634                         item = users.GetToken();
1635
1636                         const char* usr = item.c_str();
1637
1638                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1639                          * (is this even possible?) */
1640                         if (usr && *usr)
1641                         {
1642                                 const char* permissions = usr;
1643                                 int ntimes = 0;
1644                                 char* nm = new char[MAXBUF];
1645                                 char* tnm = nm;
1646
1647                                 /* Iterate through all the prefix values, convert them from prefixes
1648                                  * to mode letters, and append them to the mode sequence
1649                                  */
1650                                 while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
1651                                 {
1652                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1653                                         if (mh)
1654                                         {
1655                                                 /* This is a valid prefix */
1656                                                 ntimes++;
1657                                                 *tnm++ = mh->GetModeChar();
1658                                         }
1659                                         else
1660                                         {
1661                                                 /* Not a valid prefix...
1662                                                  * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
1663                                                  */
1664                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
1665                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
1666                                                 return false;
1667                                         }
1668                                         usr++;
1669                                         permissions++;
1670                                 }
1671
1672                                 /* Null terminate modes */
1673                                 *tnm = 0;
1674                                 /* Advance past the comma, to the nick */
1675                                 usr++;
1676
1677                                 /* Check the user actually exists */
1678                                 who = this->Instance->FindNick(usr);
1679                                 if (who)
1680                                 {
1681                                         /* Did they get any modes? How many times? */
1682                                         strlcat(modestring, nm, MAXBUF);
1683                                         for (int k = 0; k < ntimes; k++)
1684                                                 mode_users[modectr++] = strdup(usr);
1685
1686                                         /* Free temporary buffer used for mode sequence */
1687                                         delete[] nm;
1688
1689                                         /* Check that the user's 'direction' is correct
1690                                          * based on the server sending the FJOIN. We must
1691                                          * check each nickname in turn, because the origin of
1692                                          * the FJOIN may be different to the origin of the nicks
1693                                          * in the command itself.
1694                                          */
1695                                         TreeServer* route_back_again = Utils->BestRouteTo(who->server);
1696                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
1697                                         {
1698                                                 /* Oh dear oh dear. */
1699                                                 Instance->Log(DEBUG,"Fake direction in FJOIN, user '%s'",who->nick);
1700                                                 continue;
1701                                         }
1702                                         /* Finally, we can actually place the user into the channel.
1703                                          * We're sure its right. Final answer, phone a friend.
1704                                          */
1705                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
1706
1707                                         /* Have we already queued up MAXMODES modes with parameters
1708                                          * (+qaohv) ready to be sent to the server?
1709                                          */
1710                                         if (modectr >= (MAXMODES-1))
1711                                         {
1712                                                 /* Only actually give the users any status if we lost
1713                                                  * the FJOIN or drew (equal timestamps).
1714                                                  * It isn't actually possible for ourTS to be > TS here,
1715                                                  * only possible to actually have ourTS == TS, or
1716                                                  * ourTS < TS, because if we lost, we already lowered
1717                                                  * our TS above before we entered this loop. We only
1718                                                  * check >= as a safety measure, in case someone stuffed
1719                                                  * up. If someone DID stuff up, it was most likely me.
1720                                                  * Note: I do not like baseball bats in the face...
1721                                                  */
1722                                                 if (ourTS >= TS)
1723                                                 {
1724                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1725                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1726
1727                                                         /* Something stuffed up, and for some reason, the timestamp is
1728                                                          * NOT lowered right now and should be. Lower it. Usually this
1729                                                          * code won't be executed, doubtless someone will remove it some
1730                                                          * day soon.
1731                                                          */
1732                                                         if (ourTS > TS)
1733                                                         {
1734                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1735                                                                 chan->age = TS;
1736                                                                 ourTS = TS;
1737                                                         }
1738                                                 }
1739
1740                                                 /* Reset all this back to defaults, and
1741                                                  * free any ram we have left allocated.
1742                                                  */
1743                                                 strcpy(mode_users[1],"+");
1744                                                 for (unsigned int f = 2; f < modectr; f++)
1745                                                         free(mode_users[f]);
1746                                                 modectr = 2;
1747                                         }
1748                                 }
1749                                 else
1750                                 {
1751                                         /* Remember to free this */
1752                                         delete[] nm;
1753                                         /* If we got here, there's a nick in FJOIN which doesnt exist on this server.
1754                                          * We don't try to process the nickname here (that WOULD cause a segfault because
1755                                          * we'd be playing with null pointers) however, we DO pass the nickname on, just
1756                                          * in case somehow we're desynched, so that other users which might be able to see
1757                                          * the nickname get their fair chance to process it.
1758                                          */
1759                                         Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
1760                                         continue;
1761                                 }
1762                         }
1763                 }
1764
1765                 /* there werent enough modes built up to flush it during FJOIN,
1766                  * or, there are a number left over. flush them out.
1767                  */
1768                 if ((modectr > 2) && (who) && (chan))
1769                 {
1770                         if (ourTS >= TS)
1771                         {
1772                                 /* Our channel is newer than theirs. Evil deeds must be afoot. */
1773                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1774                                 /* Yet again, we can't actually get a true value here, if everything else
1775                                  * is working as it should.
1776                                  */
1777                                 if (ourTS > TS)
1778                                 {
1779                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1780                                         chan->age = TS;
1781                                         ourTS = TS;
1782                                 }
1783                         }
1784
1785                         /* Free anything we have left to free */
1786                         for (unsigned int f = 2; f < modectr; f++)
1787                                 free(mode_users[f]);
1788                 }
1789
1790                 /* All done. That wasnt so bad was it, you can wipe
1791                  * the sweat from your forehead now. :-)
1792                  */
1793                 return true;
1794         }
1795
1796         /** NICK command */
1797         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1798         {
1799                 if (params.size() < 8)
1800                         return true;
1801                 if (params.size() > 8)
1802                 {
1803                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1804                         return true;
1805                 }
1806                 // NICK age nick host dhost ident +modes ip :gecos
1807                 //       0    1   2     3     4      5   6     7
1808                 time_t age = atoi(params[0].c_str());
1809
1810                 /* This used to have a pretty craq'y loop doing the same thing,
1811                  * now we just let the STL do the hard work (more efficiently)
1812                  */
1813                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1814                 if (pos_after_plus != std::string::npos)
1815                         params[5] = params[5].substr(pos_after_plus);
1816
1817                 const char* tempnick = params[1].c_str();
1818                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1819
1820                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1821
1822                 if (iter != this->Instance->clientlist.end())
1823                 {
1824                         // nick collision
1825                         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);
1826                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1827                         userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
1828                         return true;
1829                 }
1830
1831                 userrec* _new = new userrec(this->Instance);
1832                 this->Instance->clientlist[tempnick] = _new;
1833                 _new->SetFd(FD_MAGIC_NUMBER);
1834                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1835                 strlcpy(_new->host, params[2].c_str(),63);
1836                 strlcpy(_new->dhost, params[3].c_str(),63);
1837                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1838                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1839                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1840                 _new->registered = REG_ALL;
1841                 _new->signon = age;
1842
1843                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1844                         _new->modes[(*v)-65] = 1;
1845
1846 #ifdef SUPPORT_IP6LINKS
1847                 if (params[6].find_first_of(":") != std::string::npos)
1848                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1849                 else
1850 #endif
1851                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1852
1853                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1854
1855                 params[7] = ":" + params[7];
1856                 Utils->DoOneToAllButSender(source,"NICK",params,source);
1857
1858                 // Increment the Source Servers User Count..
1859                 TreeServer* SourceServer = Utils->FindServer(source);
1860                 if (SourceServer)
1861                 {
1862                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1863                         SourceServer->AddUserCount();
1864                 }
1865
1866                 FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
1867
1868                 return true;
1869         }
1870
1871         /** Send one or more FJOINs for a channel of users.
1872          * If the length of a single line is more than 480-NICKMAX
1873          * in length, it is split over multiple lines.
1874          */
1875         void SendFJoins(TreeServer* Current, chanrec* c)
1876         {
1877                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1878                 char list[MAXBUF];
1879                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1880
1881                 size_t dlen, curlen;
1882                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1883                 int numusers = 0;
1884                 char* ptr = list + dlen;
1885
1886                 CUList *ulist = c->GetUsers();
1887                 std::string modes = "";
1888                 std::string params = "";
1889
1890                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1891                 {
1892                         // The first parameter gets a : before it
1893                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1894
1895                         curlen += ptrlen;
1896                         ptr += ptrlen;
1897
1898                         numusers++;
1899
1900                         if (curlen > (480-NICKMAX))
1901                         {
1902                                 this->WriteLine(list);
1903                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1904                                 ptr = list + dlen;
1905                                 ptrlen = 0;
1906                                 numusers = 0;
1907                         }
1908                 }
1909
1910                 if (numusers)
1911                         this->WriteLine(list);
1912
1913                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1914                 {
1915                         modes.append("b");
1916                         params.append(b->data).append(" ");
1917                 }
1918                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1919         }
1920
1921         /** Send G, Q, Z and E lines */
1922         void SendXLines(TreeServer* Current)
1923         {
1924                 char data[MAXBUF];
1925                 std::string n = this->Instance->Config->ServerName;
1926                 const char* sn = n.c_str();
1927                 int iterations = 0;
1928                 /* Yes, these arent too nice looking, but they get the job done */
1929                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1930                 {
1931                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1932                         this->WriteLine(data);
1933                 }
1934                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1935                 {
1936                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1937                         this->WriteLine(data);
1938                 }
1939                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1940                 {
1941                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1942                         this->WriteLine(data);
1943                 }
1944                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1945                 {
1946                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1947                         this->WriteLine(data);
1948                 }
1949                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1950                 {
1951                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1952                         this->WriteLine(data);
1953                 }
1954                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1955                 {
1956                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1957                         this->WriteLine(data);
1958                 }
1959                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1960                 {
1961                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1962                         this->WriteLine(data);
1963                 }
1964                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1965                 {
1966                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1967                         this->WriteLine(data);
1968                 }
1969         }
1970
1971         /** Send channel modes and topics */
1972         void SendChannelModes(TreeServer* Current)
1973         {
1974                 char data[MAXBUF];
1975                 std::deque<std::string> list;
1976                 int iterations = 0;
1977                 std::string n = this->Instance->Config->ServerName;
1978                 const char* sn = n.c_str();
1979                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1980                 {
1981                         SendFJoins(Current, c->second);
1982                         if (*c->second->topic)
1983                         {
1984                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1985                                 this->WriteLine(data);
1986                         }
1987                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
1988                         list.clear();
1989                         c->second->GetExtList(list);
1990                         for (unsigned int j = 0; j < list.size(); j++)
1991                         {
1992                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
1993                         }
1994                 }
1995         }
1996
1997         /** send all users and their oper state/modes */
1998         void SendUsers(TreeServer* Current)
1999         {
2000                 char data[MAXBUF];
2001                 std::deque<std::string> list;
2002                 int iterations = 0;
2003                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
2004                 {
2005                         if (u->second->registered == REG_ALL)
2006                         {
2007                                 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);
2008                                 this->WriteLine(data);
2009                                 if (*u->second->oper)
2010                                 {
2011                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
2012                                 }
2013                                 if (*u->second->awaymsg)
2014                                 {
2015                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
2016                                 }
2017                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
2018                                 list.clear();
2019                                 u->second->GetExtList(list);
2020                                 for (unsigned int j = 0; j < list.size(); j++)
2021                                 {
2022                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
2023                                 }
2024                         }
2025                 }
2026         }
2027
2028         /** This function is called when we want to send a netburst to a local
2029          * server. There is a set order we must do this, because for example
2030          * users require their servers to exist, and channels require their
2031          * users to exist. You get the idea.
2032          */
2033         void DoBurst(TreeServer* s)
2034         {
2035                 std::string burst = "BURST "+ConvToStr(time(NULL));
2036                 std::string endburst = "ENDBURST";
2037                 // Because by the end of the netburst, it  could be gone!
2038                 std::string name = s->GetName();
2039                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
2040                 this->WriteLine(burst);
2041                 /* send our version string */
2042                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
2043                 /* Send server tree */
2044                 this->SendServers(Utils->TreeRoot,s,1);
2045                 /* Send users and their oper status */
2046                 this->SendUsers(s);
2047                 /* Send everything else (channel modes, xlines etc) */
2048                 this->SendChannelModes(s);
2049                 this->SendXLines(s);
2050                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
2051                 this->WriteLine(endburst);
2052                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
2053         }
2054
2055         /** This function is called when we receive data from a remote
2056          * server. We buffer the data in a std::string (it doesnt stay
2057          * there for long), reading using InspSocket::Read() which can
2058          * read up to 16 kilobytes in one operation.
2059          *
2060          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
2061          * THE SOCKET OBJECT FOR US.
2062          */
2063         virtual bool OnDataReady()
2064         {
2065                 char* data = this->Read();
2066                 /* Check that the data read is a valid pointer and it has some content */
2067                 if (data && *data)
2068                 {
2069                         this->in_buffer.append(data);
2070                         /* While there is at least one new line in the buffer,
2071                          * do something useful (we hope!) with it.
2072                          */
2073                         while (in_buffer.find("\n") != std::string::npos)
2074                         {
2075                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
2076                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
2077                                 /* Use rfind here not find, as theres more
2078                                  * chance of the \r being near the end of the
2079                                  * string, not the start.
2080                                  */
2081                                 if (ret.rfind("\r") != std::string::npos)
2082                                         ret = in_buffer.substr(0,in_buffer.rfind("\r")-1);
2083                                 /* Process this one, abort if it
2084                                  * didnt return true.
2085                                  */
2086                                 if (this->ctx_in)
2087                                 {
2088                                         char out[1024];
2089                                         char result[1024];
2090                                         memset(result,0,1024);
2091                                         memset(out,0,1024);
2092                                         /* ERROR + CAPAB is still allowed unencryped */
2093                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
2094                                         {
2095                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
2096                                                 if ((nbytes > 0) && (nbytes < 1024))
2097                                                 {
2098                                                         ctx_in->Decrypt(out, result, nbytes, 0);
2099                                                         for (int t = 0; t < nbytes; t++)
2100                                                                 if (result[t] == '\7') result[t] = 0;
2101                                                         ret = result;
2102                                                 }
2103                                         }
2104                                 }
2105                                 if (!this->ProcessLine(ret))
2106                                 {
2107                                         Instance->Log(DEBUG,"ProcessLine says no!");
2108                                         return false;
2109                                 }
2110                         }
2111                         return true;
2112                 }
2113                 /* EAGAIN returns an empty but non-NULL string, so this
2114                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2115                  */
2116                 return (data && !*data);
2117         }
2118
2119         int WriteLine(std::string line)
2120         {
2121                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2122                 if (this->ctx_out)
2123                 {
2124                         char result[10240];
2125                         char result64[10240];
2126                         if (this->keylength)
2127                         {
2128                                 // pad it to the key length
2129                                 int n = this->keylength - (line.length() % this->keylength);
2130                                 if (n)
2131                                         line.append(n,'\7');
2132                         }
2133                         unsigned int ll = line.length();
2134                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2135                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2136                         line = result64;
2137                 }
2138                 line.append("\r\n");
2139                 return this->Write(line);
2140         }
2141
2142         /* Handle ERROR command */
2143         bool Error(std::deque<std::string> &params)
2144         {
2145                 if (params.size() < 1)
2146                         return false;
2147                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2148                 /* we will return false to cause the socket to close. */
2149                 return false;
2150         }
2151
2152         /** remote MOTD. leet, huh? */
2153         bool Motd(std::string prefix, std::deque<std::string> &params)
2154         {
2155                 if (params.size() > 0)
2156                 {
2157                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2158                         {
2159                                 /* It's for our server */
2160                                 string_list results;
2161                                 userrec* source = this->Instance->FindNick(prefix);
2162
2163                                 if (source)
2164                                 {
2165                                         std::deque<std::string> par;
2166                                         par.push_back(prefix);
2167                                         par.push_back("");
2168
2169                                         if (!Instance->Config->MOTD.size())
2170                                         {
2171                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2172                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2173                                                 return true;
2174                                         }
2175
2176                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2177                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2178
2179                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2180                                         {
2181                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2182                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2183                                         }
2184
2185                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2186                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2187                                 }
2188                         }
2189                         else
2190                         {
2191                                 /* Pass it on */
2192                                 userrec* source = this->Instance->FindNick(prefix);
2193                                 if (source)
2194                                         Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
2195                         }
2196                 }
2197                 return true;
2198         }
2199
2200         /** remote ADMIN. leet, huh? */
2201         bool Admin(std::string prefix, std::deque<std::string> &params)
2202         {
2203                 if (params.size() > 0)
2204                 {
2205                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2206                         {
2207                                 /* It's for our server */
2208                                 string_list results;
2209                                 userrec* source = this->Instance->FindNick(prefix);
2210
2211                                 if (source)
2212                                 {
2213                                         std::deque<std::string> par;
2214                                         par.push_back(prefix);
2215                                         par.push_back("");
2216
2217                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2218                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2219
2220                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2221                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2222
2223                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2224                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2225
2226                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2227                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2228                                 }
2229                         }
2230                         else
2231                         {
2232                                 /* Pass it on */
2233                                 userrec* source = this->Instance->FindNick(prefix);
2234                                 if (source)
2235                                         Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
2236                         }
2237                 }
2238                 return true;
2239         }
2240
2241         bool Stats(std::string prefix, std::deque<std::string> &params)
2242         {
2243                 /* Get the reply to a STATS query if it matches this servername,
2244                  * and send it back as a load of PUSH queries
2245                  */
2246                 if (params.size() > 1)
2247                 {
2248                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2249                         {
2250                                 /* It's for our server */
2251                                 string_list results;
2252                                 userrec* source = this->Instance->FindNick(prefix);
2253                                 if (source)
2254                                 {
2255                                         std::deque<std::string> par;
2256                                         par.push_back(prefix);
2257                                         par.push_back("");
2258                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2259                                         for (size_t i = 0; i < results.size(); i++)
2260                                         {
2261                                                 par[1] = "::" + results[i];
2262                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2263                                         }
2264                                 }
2265                         }
2266                         else
2267                         {
2268                                 /* Pass it on */
2269                                 userrec* source = this->Instance->FindNick(prefix);
2270                                 if (source)
2271                                         Utils->DoOneToOne(prefix, "STATS", params, params[1]);
2272                         }
2273                 }
2274                 return true;
2275         }
2276
2277
2278         /** Because the core won't let users or even SERVERS set +o,
2279          * we use the OPERTYPE command to do this.
2280          */
2281         bool OperType(std::string prefix, std::deque<std::string> &params)
2282         {
2283                 if (params.size() != 1)
2284                 {
2285                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2286                         return true;
2287                 }
2288                 std::string opertype = params[0];
2289                 userrec* u = this->Instance->FindNick(prefix);
2290                 if (u)
2291                 {
2292                         u->modes[UM_OPERATOR] = 1;
2293                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2294                         Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2295                 }
2296                 return true;
2297         }
2298
2299         /** Because Andy insists that services-compatible servers must
2300          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2301          */
2302         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2303         {
2304                 if (params.size() < 3)
2305                         return true;
2306
2307                 userrec* u = this->Instance->FindNick(params[0]);
2308
2309                 if (u)
2310                 {
2311                         Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2312                         if (IS_LOCAL(u))
2313                         {
2314                                 std::deque<std::string> par;
2315                                 par.push_back(params[1]);
2316                                 /* This is not required as one is sent in OnUserPostNick below
2317                                  */
2318                                 //Utils->DoOneToMany(u->nick,"NICK",par);
2319                                 if (!u->ForceNickChange(params[1].c_str()))
2320                                 {
2321                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2322                                         return true;
2323                                 }
2324                                 u->age = atoi(params[2].c_str());
2325                         }
2326                 }
2327                 return true;
2328         }
2329
2330         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2331         {
2332                 if (params.size() < 2)
2333                         return true;
2334
2335                 userrec* u = this->Instance->FindNick(params[0]);
2336
2337                 if (u)
2338                 {
2339                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2340                         Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2341                 }
2342                 return true;
2343         }
2344
2345         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2346         {
2347                 if (params.size() < 1)
2348                         return false;
2349
2350                 std::string servermask = params[0];
2351
2352                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2353                 {
2354                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2355                         this->Instance->RehashServer();
2356                         Utils->ReadConfiguration(false);
2357                         InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
2358                 }
2359                 Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
2360                 return true;
2361         }
2362
2363         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2364         {
2365                 if (params.size() != 2)
2366                         return true;
2367
2368                 std::string nick = params[0];
2369                 userrec* u = this->Instance->FindNick(prefix);
2370                 userrec* who = this->Instance->FindNick(nick);
2371
2372                 if (who)
2373                 {
2374                         /* Prepend kill source, if we don't have one */
2375                         std::string sourceserv = prefix;
2376                         if (u)
2377                         {
2378                                 sourceserv = u->server;
2379                         }
2380                         if (*(params[1].c_str()) != '[')
2381                         {
2382                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2383                         }
2384                         std::string reason = params[1];
2385                         params[1] = ":" + params[1];
2386                         Utils->DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2387                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2388                         userrec::QuitUser(this->Instance,who,reason);
2389                 }
2390                 return true;
2391         }
2392
2393         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2394         {
2395                 if (params.size() < 1)
2396                         return true;
2397
2398                 if (params.size() == 1)
2399                 {
2400                         TreeServer* ServerSource = Utils->FindServer(prefix);
2401                         if (ServerSource)
2402                         {
2403                                 ServerSource->SetPingFlag();
2404                         }
2405                 }
2406                 else
2407                 {
2408                         std::string forwardto = params[1];
2409                         if (forwardto == this->Instance->Config->ServerName)
2410                         {
2411                                 /*
2412                                  * this is a PONG for us
2413                                  * if the prefix is a user, check theyre local, and if they are,
2414                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2415                                  * Services might want to send these s->s, but we dont need to yet.
2416                                  */
2417                                 userrec* u = this->Instance->FindNick(prefix);
2418
2419                                 if (u)
2420                                 {
2421                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2422                                 }
2423                         }
2424                         else
2425                         {
2426                                 // not for us, pass it on :)
2427                                 Utils->DoOneToOne(prefix,"PONG",params,forwardto);
2428                         }
2429                 }
2430
2431                 return true;
2432         }
2433
2434         bool MetaData(std::string prefix, std::deque<std::string> &params)
2435         {
2436                 if (params.size() < 3)
2437                         return true;
2438
2439                 TreeServer* ServerSource = Utils->FindServer(prefix);
2440
2441                 if (ServerSource)
2442                 {
2443                         if (params[0] == "*")
2444                         {
2445                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2446                         }
2447                         else if (*(params[0].c_str()) == '#')
2448                         {
2449                                 chanrec* c = this->Instance->FindChan(params[0]);
2450                                 if (c)
2451                                 {
2452                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2453                                 }
2454                         }
2455                         else if (*(params[0].c_str()) != '#')
2456                         {
2457                                 userrec* u = this->Instance->FindNick(params[0]);
2458                                 if (u)
2459                                 {
2460                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2461                                 }
2462                         }
2463                 }
2464
2465                 params[2] = ":" + params[2];
2466                 Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
2467                 return true;
2468         }
2469
2470         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2471         {
2472                 if (params.size() < 1)
2473                         return true;
2474
2475                 TreeServer* ServerSource = Utils->FindServer(prefix);
2476
2477                 if (ServerSource)
2478                 {
2479                         ServerSource->SetVersion(params[0]);
2480                 }
2481                 params[0] = ":" + params[0];
2482                 Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
2483                 return true;
2484         }
2485
2486         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2487         {
2488                 if (params.size() < 1)
2489                         return true;
2490
2491                 userrec* u = this->Instance->FindNick(prefix);
2492
2493                 if (u)
2494                 {
2495                         u->ChangeDisplayedHost(params[0].c_str());
2496                         Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
2497                 }
2498                 return true;
2499         }
2500
2501         bool AddLine(std::string prefix, std::deque<std::string> &params)
2502         {
2503                 if (params.size() < 6)
2504                         return true;
2505
2506                 bool propogate = false;
2507
2508                 switch (*(params[0].c_str()))
2509                 {
2510                         case 'Z':
2511                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2512                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2513                         break;
2514                         case 'Q':
2515                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2516                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2517                         break;
2518                         case 'E':
2519                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2520                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2521                         break;
2522                         case 'G':
2523                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2524                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2525                         break;
2526                         case 'K':
2527                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2528                         break;
2529                         default:
2530                                 /* Just in case... */
2531                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2532                                 propogate = false;
2533                         break;
2534                 }
2535
2536                 /* Send it on its way */
2537                 if (propogate)
2538                 {
2539                         if (atoi(params[4].c_str()))
2540                         {
2541                                 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());
2542                         }
2543                         else
2544                         {
2545                                 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());
2546                         }
2547                         params[5] = ":" + params[5];
2548                         Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2549                 }
2550                 if (!this->bursting)
2551                 {
2552                         Instance->Log(DEBUG,"Applying lines...");
2553                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2554                 }
2555                 return true;
2556         }
2557
2558         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2559         {
2560                 if (params.size() < 1)
2561                         return true;
2562
2563                 userrec* u = this->Instance->FindNick(prefix);
2564
2565                 if (u)
2566                 {
2567                         u->ChangeName(params[0].c_str());
2568                         params[0] = ":" + params[0];
2569                         Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
2570                 }
2571                 return true;
2572         }
2573
2574         bool Whois(std::string prefix, std::deque<std::string> &params)
2575         {
2576                 if (params.size() < 1)
2577                         return true;
2578
2579                 Instance->Log(DEBUG,"In IDLE command");
2580                 userrec* u = this->Instance->FindNick(prefix);
2581
2582                 if (u)
2583                 {
2584                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2585                         // an incoming request
2586                         if (params.size() == 1)
2587                         {
2588                                 userrec* x = this->Instance->FindNick(params[0]);
2589                                 if ((x) && (IS_LOCAL(x)))
2590                                 {
2591                                         userrec* x = this->Instance->FindNick(params[0]);
2592                                         char signon[MAXBUF];
2593                                         char idle[MAXBUF];
2594
2595                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2596                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2597                                         std::deque<std::string> par;
2598                                         par.push_back(prefix);
2599                                         par.push_back(signon);
2600                                         par.push_back(idle);
2601                                         // ours, we're done, pass it BACK
2602                                         Utils->DoOneToOne(params[0],"IDLE",par,u->server);
2603                                 }
2604                                 else
2605                                 {
2606                                         // not ours pass it on
2607                                         Utils->DoOneToOne(prefix,"IDLE",params,x->server);
2608                                 }
2609                         }
2610                         else if (params.size() == 3)
2611                         {
2612                                 std::string who_did_the_whois = params[0];
2613                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2614                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2615                                 {
2616                                         // an incoming reply to a whois we sent out
2617                                         std::string nick_whoised = prefix;
2618                                         unsigned long signon = atoi(params[1].c_str());
2619                                         unsigned long idle = atoi(params[2].c_str());
2620                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2621                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2622                                 }
2623                                 else
2624                                 {
2625                                         // not ours, pass it on
2626                                         Utils->DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2627                                 }
2628                         }
2629                 }
2630                 return true;
2631         }
2632
2633         bool Push(std::string prefix, std::deque<std::string> &params)
2634         {
2635                 if (params.size() < 2)
2636                         return true;
2637
2638                 userrec* u = this->Instance->FindNick(params[0]);
2639
2640                 if (!u)
2641                         return true;
2642
2643                 if (IS_LOCAL(u))
2644                 {
2645                         u->Write(params[1]);
2646                 }
2647                 else
2648                 {
2649                         // continue the raw onwards
2650                         params[1] = ":" + params[1];
2651                         Utils->DoOneToOne(prefix,"PUSH",params,u->server);
2652                 }
2653                 return true;
2654         }
2655
2656         bool Time(std::string prefix, std::deque<std::string> &params)
2657         {
2658                 // :source.server TIME remote.server sendernick
2659                 // :remote.server TIME source.server sendernick TS
2660                 if (params.size() == 2)
2661                 {
2662                         // someone querying our time?
2663                         if (this->Instance->Config->ServerName == params[0])
2664                         {
2665                                 userrec* u = this->Instance->FindNick(params[1]);
2666                                 if (u)
2667                                 {
2668                                         char curtime[256];
2669                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2670                                         params.push_back(curtime);
2671                                         params[0] = prefix;
2672                                         Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2673                                 }
2674                         }
2675                         else
2676                         {
2677                                 // not us, pass it on
2678                                 userrec* u = this->Instance->FindNick(params[1]);
2679                                 if (u)
2680                                         Utils->DoOneToOne(prefix,"TIME",params,params[0]);
2681                         }
2682                 }
2683                 else if (params.size() == 3)
2684                 {
2685                         // a response to a previous TIME
2686                         userrec* u = this->Instance->FindNick(params[1]);
2687                         if ((u) && (IS_LOCAL(u)))
2688                         {
2689                         time_t rawtime = atol(params[2].c_str());
2690                         struct tm * timeinfo;
2691                         timeinfo = localtime(&rawtime);
2692                                 char tms[26];
2693                                 snprintf(tms,26,"%s",asctime(timeinfo));
2694                                 tms[24] = 0;
2695                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2696                         }
2697                         else
2698                         {
2699                                 if (u)
2700                                         Utils->DoOneToOne(prefix,"TIME",params,u->server);
2701                         }
2702                 }
2703                 return true;
2704         }
2705
2706         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2707         {
2708                 if (params.size() < 1)
2709                         return true;
2710
2711                 if (params.size() == 1)
2712                 {
2713                         std::string stufftobounce = params[0];
2714                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2715                         return true;
2716                 }
2717                 else
2718                 {
2719                         std::string forwardto = params[1];
2720                         if (forwardto == this->Instance->Config->ServerName)
2721                         {
2722                                 // this is a ping for us, send back PONG to the requesting server
2723                                 params[1] = params[0];
2724                                 params[0] = forwardto;
2725                                 Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
2726                         }
2727                         else
2728                         {
2729                                 // not for us, pass it on :)
2730                                 Utils->DoOneToOne(prefix,"PING",params,forwardto);
2731                         }
2732                         return true;
2733                 }
2734         }
2735
2736         bool RemoveStatus(std::string prefix, std::deque<std::string> &params)
2737         {
2738                 if (params.size() < 1)
2739                         return true;
2740
2741                 chanrec* c = Instance->FindChan(params[0]);
2742
2743                 if (c)
2744                 {
2745                         irc::modestacker modestack(false);
2746                         CUList *ulist = c->GetUsers();
2747                         const char* y[127];
2748                         std::deque<std::string> stackresult;
2749                         std::string x;
2750
2751                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2752                         {
2753                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2754                                 if (modesequence.length())
2755                                 {
2756                                         Instance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2757                                         irc::spacesepstream sep(modesequence);
2758                                         std::string modeletters = sep.GetToken();
2759                                         Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2760
2761                                         while (!modeletters.empty())
2762                                         {
2763                                                 char mletter = *(modeletters.begin());
2764                                                 modestack.Push(mletter,sep.GetToken());
2765                                                 Instance->Log(DEBUG,"Push letter = '%c'",mletter);
2766                                                 modeletters.erase(modeletters.begin());
2767                                                 Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2768                                         }
2769                                 }
2770                         }
2771
2772                         while (modestack.GetStackedLine(stackresult))
2773                         {
2774                                 Instance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2775                                 stackresult.push_front(ConvToStr(c->age));
2776                                 stackresult.push_front(c->name);
2777                                 Utils->DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2778                                 stackresult.erase(stackresult.begin() + 1);
2779                                 Instance->Log(DEBUG,"Stacked items:");
2780                                 for (size_t z = 0; z < stackresult.size(); z++)
2781                                 {
2782                                         y[z] = stackresult[z].c_str();
2783                                         Instance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2784                                 }
2785                                 userrec* n = new userrec(Instance);
2786                                 n->SetFd(FD_MAGIC_NUMBER);
2787                                 Instance->SendMode(y, stackresult.size(), n);
2788                                 delete n;
2789                         }
2790                 }
2791                 return true;
2792         }
2793
2794         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2795         {
2796                 if (params.size() < 4)
2797                         return false;
2798
2799                 std::string servername = params[0];
2800                 std::string password = params[1];
2801                 // hopcount is not used for a remote server, we calculate this ourselves
2802                 std::string description = params[3];
2803                 TreeServer* ParentOfThis = Utils->FindServer(prefix);
2804
2805                 if (!ParentOfThis)
2806                 {
2807                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2808                         return false;
2809                 }
2810                 TreeServer* CheckDupe = Utils->FindServer(servername);
2811                 if (CheckDupe)
2812                 {
2813                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2814                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2815                         return false;
2816                 }
2817                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL);
2818                 ParentOfThis->AddChild(Node);
2819                 params[3] = ":" + params[3];
2820                 Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
2821                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2822                 return true;
2823         }
2824
2825         bool Outbound_Reply_Server(std::deque<std::string> &params)
2826         {
2827                 if (params.size() < 4)
2828                         return false;
2829
2830                 irc::string servername = params[0].c_str();
2831                 std::string sname = params[0];
2832                 std::string password = params[1];
2833                 int hops = atoi(params[2].c_str());
2834
2835                 if (hops)
2836                 {
2837                         this->WriteLine("ERROR :Server too far away for authentication");
2838                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2839                         return false;
2840                 }
2841                 std::string description = params[3];
2842                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2843                 {
2844                         if ((x->Name == servername) && (x->RecvPass == password))
2845                         {
2846                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2847                                 if (CheckDupe)
2848                                 {
2849                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2850                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2851                                         return false;
2852                                 }
2853                                 // Begin the sync here. this kickstarts the
2854                                 // other side, waiting in WAIT_AUTH_2 state,
2855                                 // into starting their burst, as it shows
2856                                 // that we're happy.
2857                                 this->LinkState = CONNECTED;
2858                                 // we should add the details of this server now
2859                                 // to the servers tree, as a child of the root
2860                                 // node.
2861                                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this);
2862                                 Utils->TreeRoot->AddChild(Node);
2863                                 params[3] = ":" + params[3];
2864                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
2865                                 this->bursting = true;
2866                                 this->DoBurst(Node);
2867                                 return true;
2868                         }
2869                 }
2870                 this->WriteLine("ERROR :Invalid credentials");
2871                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2872                 return false;
2873         }
2874
2875         bool Inbound_Server(std::deque<std::string> &params)
2876         {
2877                 if (params.size() < 4)
2878                         return false;
2879
2880                 irc::string servername = params[0].c_str();
2881                 std::string sname = params[0];
2882                 std::string password = params[1];
2883                 int hops = atoi(params[2].c_str());
2884
2885                 if (hops)
2886                 {
2887                         this->WriteLine("ERROR :Server too far away for authentication");
2888                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2889                         return false;
2890                 }
2891                 std::string description = params[3];
2892                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2893                 {
2894                         if ((x->Name == servername) && (x->RecvPass == password))
2895                         {
2896                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2897                                 if (CheckDupe)
2898                                 {
2899                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2900                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2901                                         return false;
2902                                 }
2903                                 /* If the config says this link is encrypted, but the remote side
2904                                  * hasnt bothered to send the AES command before SERVER, then we
2905                                  * boot them off as we MUST have this connection encrypted.
2906                                  */
2907                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2908                                 {
2909                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2910                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2911                                         return false;
2912                                 }
2913                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2914                                 this->InboundServerName = sname;
2915                                 this->InboundDescription = description;
2916                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2917                                 // along with the sendpass from this block.
2918                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2919                                 // move to the next state, we are now waiting for THEM.
2920                                 this->LinkState = WAIT_AUTH_2;
2921                                 return true;
2922                         }
2923                 }
2924                 this->WriteLine("ERROR :Invalid credentials");
2925                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2926                 return false;
2927         }
2928
2929         void Split(std::string line, std::deque<std::string> &n)
2930         {
2931                 n.clear();
2932                 irc::tokenstream tokens(line);
2933                 std::string param;
2934                 while ((param = tokens.GetToken()) != "")
2935                         n.push_back(param);
2936                 return;
2937         }
2938
2939         bool ProcessLine(std::string line)
2940         {
2941                 std::deque<std::string> params;
2942                 irc::string command;
2943                 std::string prefix;
2944
2945                 if (line.empty())
2946                         return true;
2947
2948                 line = line.substr(0, line.find_first_of("\r\n"));
2949
2950                 Instance->Log(DEBUG,"IN: %s", line.c_str());
2951
2952                 this->Split(line.c_str(),params);
2953
2954                 if ((params[0][0] == ':') && (params.size() > 1))
2955                 {
2956                         prefix = params[0].substr(1);
2957                         params.pop_front();
2958                 }
2959
2960                 command = params[0].c_str();
2961                 params.pop_front();
2962
2963                 if ((!this->ctx_in) && (command == "AES"))
2964                 {
2965                         std::string sserv = params[0];
2966                         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2967                         {
2968                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2969                                 {
2970                                         this->InitAES(x->EncryptionKey,sserv);
2971                                 }
2972                         }
2973
2974                         return true;
2975                 }
2976                 else if ((this->ctx_in) && (command == "AES"))
2977                 {
2978                         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());
2979                 }
2980
2981                 switch (this->LinkState)
2982                 {
2983                         TreeServer* Node;
2984
2985                         case WAIT_AUTH_1:
2986                                 // Waiting for SERVER command from remote server. Server initiating
2987                                 // the connection sends the first SERVER command, listening server
2988                                 // replies with theirs if its happy, then if the initiator is happy,
2989                                 // it starts to send its net sync, which starts the merge, otherwise
2990                                 // it sends an ERROR.
2991                                 if (command == "PASS")
2992                                 {
2993                                         /* Silently ignored */
2994                                 }
2995                                 else if (command == "SERVER")
2996                                 {
2997                                         return this->Inbound_Server(params);
2998                                 }
2999                                 else if (command == "ERROR")
3000                                 {
3001                                         return this->Error(params);
3002                                 }
3003                                 else if (command == "USER")
3004                                 {
3005                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
3006                                         return false;
3007                                 }
3008                                 else if (command == "CAPAB")
3009                                 {
3010                                         return this->Capab(params);
3011                                 }
3012                                 else if ((command == "U") || (command == "S"))
3013                                 {
3014                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3015                                         return false;
3016                                 }
3017                                 else
3018                                 {
3019                                         std::string error("ERROR :Invalid command in negotiation phase: ");
3020                                         error.append(command.c_str());
3021                                         this->WriteLine(error);
3022                                         return false;
3023                                 }
3024                         break;
3025                         case WAIT_AUTH_2:
3026                                 // Waiting for start of other side's netmerge to say they liked our
3027                                 // password.
3028                                 if (command == "SERVER")
3029                                 {
3030                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
3031                                         // silently ignore.
3032                                         return true;
3033                                 }
3034                                 else if ((command == "U") || (command == "S"))
3035                                 {
3036                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3037                                         return false;
3038                                 }
3039                                 else if (command == "BURST")
3040                                 {
3041                                         if (params.size())
3042                                         {
3043                                                 /* If a time stamp is provided, try and check syncronization */
3044                                                 time_t THEM = atoi(params[0].c_str());
3045                                                 long delta = THEM-time(NULL);
3046                                                 if ((delta < -600) || (delta > 600))
3047                                                 {
3048                                                         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));
3049                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
3050                                                         return false;
3051                                                 }
3052                                                 else if ((delta < -60) || (delta > 60))
3053                                                 {
3054                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
3055                                                 }
3056                                         }
3057                                         this->LinkState = CONNECTED;
3058                                         Node = new TreeServer(this->Utils,this->Instance,InboundServerName,InboundDescription,Utils->TreeRoot,this);
3059                                         Utils->TreeRoot->AddChild(Node);
3060                                         params.clear();
3061                                         params.push_back(InboundServerName);
3062                                         params.push_back("*");
3063                                         params.push_back("1");
3064                                         params.push_back(":"+InboundDescription);
3065                                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
3066                                         this->bursting = true;
3067                                         this->DoBurst(Node);
3068                                 }
3069                                 else if (command == "ERROR")
3070                                 {
3071                                         return this->Error(params);
3072                                 }
3073                                 else if (command == "CAPAB")
3074                                 {
3075                                         return this->Capab(params);
3076                                 }
3077
3078                         break;
3079                         case LISTENER:
3080                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
3081                                 return false;
3082                         break;
3083                         case CONNECTING:
3084                                 if (command == "SERVER")
3085                                 {
3086                                         // another server we connected to, which was in WAIT_AUTH_1 state,
3087                                         // has just sent us their credentials. If we get this far, theyre
3088                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
3089                                         // if we're happy with this, we should send our netburst which
3090                                         // kickstarts the merge.
3091                                         return this->Outbound_Reply_Server(params);
3092                                 }
3093                                 else if (command == "ERROR")
3094                                 {
3095                                         return this->Error(params);
3096                                 }
3097                         break;
3098                         case CONNECTED:
3099                                 // This is the 'authenticated' state, when all passwords
3100                                 // have been exchanged and anything past this point is taken
3101                                 // as gospel.
3102
3103                                 if (prefix != "")
3104                                 {
3105                                         std::string direction = prefix;
3106                                         userrec* t = this->Instance->FindNick(prefix);
3107                                         if (t)
3108                                         {
3109                                                 direction = t->server;
3110                                         }
3111                                         TreeServer* route_back_again = Utils->BestRouteTo(direction);
3112                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3113                                         {
3114                                                 if (route_back_again)
3115                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3116                                                 return true;
3117                                         }
3118
3119                                         /* Fix by brain:
3120                                          * When there is activity on the socket, reset the ping counter so
3121                                          * that we're not wasting bandwidth pinging an active server.
3122                                          */
3123                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3124                                         route_back_again->SetPingFlag();
3125                                 }
3126
3127                                 if (command == "SVSMODE")
3128                                 {
3129                                         /* Services expects us to implement
3130                                          * SVSMODE. In inspircd its the same as
3131                                          * MODE anyway.
3132                                          */
3133                                         command = "MODE";
3134                                 }
3135                                 std::string target = "";
3136                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3137                                  * working with std::string here.
3138                                  */
3139                                 if ((command == "NICK") && (params.size() > 1))
3140                                 {
3141                                         return this->IntroduceClient(prefix,params);
3142                                 }
3143                                 else if (command == "FJOIN")
3144                                 {
3145                                         return this->ForceJoin(prefix,params);
3146                                 }
3147                                 else if (command == "STATS")
3148                                 {
3149                                         return this->Stats(prefix, params);
3150                                 }
3151                                 else if (command == "MOTD")
3152                                 {
3153                                         return this->Motd(prefix, params);
3154                                 }
3155                                 else if (command == "ADMIN")
3156                                 {
3157                                         return this->Admin(prefix, params);
3158                                 }
3159                                 else if (command == "SERVER")
3160                                 {
3161                                         return this->RemoteServer(prefix,params);
3162                                 }
3163                                 else if (command == "ERROR")
3164                                 {
3165                                         return this->Error(params);
3166                                 }
3167                                 else if (command == "OPERTYPE")
3168                                 {
3169                                         return this->OperType(prefix,params);
3170                                 }
3171                                 else if (command == "FMODE")
3172                                 {
3173                                         return this->ForceMode(prefix,params);
3174                                 }
3175                                 else if (command == "KILL")
3176                                 {
3177                                         return this->RemoteKill(prefix,params);
3178                                 }
3179                                 else if (command == "FTOPIC")
3180                                 {
3181                                         return this->ForceTopic(prefix,params);
3182                                 }
3183                                 else if (command == "REHASH")
3184                                 {
3185                                         return this->RemoteRehash(prefix,params);
3186                                 }
3187                                 else if (command == "METADATA")
3188                                 {
3189                                         return this->MetaData(prefix,params);
3190                                 }
3191                                 else if (command == "REMSTATUS")
3192                                 {
3193                                         return this->RemoveStatus(prefix,params);
3194                                 }
3195                                 else if (command == "PING")
3196                                 {
3197                                         /*
3198                                          * We just got a ping from a server that's bursting.
3199                                          * This can't be right, so set them to not bursting, and
3200                                          * apply their lines.
3201                                          */
3202                                         if (this->bursting)
3203                                         {
3204                                                 this->bursting = false;
3205                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3206                                         }
3207                                         if (prefix == "")
3208                                         {
3209                                                 prefix = this->GetName();
3210                                         }
3211                                         return this->LocalPing(prefix,params);
3212                                 }
3213                                 else if (command == "PONG")
3214                                 {
3215                                         /*
3216                                          * We just got a pong from a server that's bursting.
3217                                          * This can't be right, so set them to not bursting, and
3218                                          * apply their lines.
3219                                          */
3220                                         if (this->bursting)
3221                                         {
3222                                                 this->bursting = false;
3223                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3224                                         }
3225                                         if (prefix == "")
3226                                         {
3227                                                 prefix = this->GetName();
3228                                         }
3229                                         return this->LocalPong(prefix,params);
3230                                 }
3231                                 else if (command == "VERSION")
3232                                 {
3233                                         return this->ServerVersion(prefix,params);
3234                                 }
3235                                 else if (command == "FHOST")
3236                                 {
3237                                         return this->ChangeHost(prefix,params);
3238                                 }
3239                                 else if (command == "FNAME")
3240                                 {
3241                                         return this->ChangeName(prefix,params);
3242                                 }
3243                                 else if (command == "ADDLINE")
3244                                 {
3245                                         return this->AddLine(prefix,params);
3246                                 }
3247                                 else if (command == "SVSNICK")
3248                                 {
3249                                         if (prefix == "")
3250                                         {
3251                                                 prefix = this->GetName();
3252                                         }
3253                                         return this->ForceNick(prefix,params);
3254                                 }
3255                                 else if (command == "IDLE")
3256                                 {
3257                                         return this->Whois(prefix,params);
3258                                 }
3259                                 else if (command == "PUSH")
3260                                 {
3261                                         return this->Push(prefix,params);
3262                                 }
3263                                 else if (command == "TIME")
3264                                 {
3265                                         return this->Time(prefix,params);
3266                                 }
3267                                 else if ((command == "KICK") && (Utils->IsServer(prefix)))
3268                                 {
3269                                         std::string sourceserv = this->myhost;
3270                                         if (params.size() == 3)
3271                                         {
3272                                                 userrec* user = this->Instance->FindNick(params[1]);
3273                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3274                                                 if (user && chan)
3275                                                 {
3276                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3277                                                                 /* Yikes, the channels gone! */
3278                                                                 delete chan;
3279                                                 }
3280                                         }
3281                                         if (this->InboundServerName != "")
3282                                         {
3283                                                 sourceserv = this->InboundServerName;
3284                                         }
3285                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3286                                 }
3287                                 else if (command == "SVSJOIN")
3288                                 {
3289                                         if (prefix == "")
3290                                         {
3291                                                 prefix = this->GetName();
3292                                         }
3293                                         return this->ServiceJoin(prefix,params);
3294                                 }
3295                                 else if (command == "SQUIT")
3296                                 {
3297                                         if (params.size() == 2)
3298                                         {
3299                                                 this->Squit(Utils->FindServer(params[0]),params[1]);
3300                                         }
3301                                         return true;
3302                                 }
3303                                 else if (command == "ENDBURST")
3304                                 {
3305                                         this->bursting = false;
3306                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3307                                         std::string sourceserv = this->myhost;
3308                                         if (this->InboundServerName != "")
3309                                         {
3310                                                 sourceserv = this->InboundServerName;
3311                                         }
3312                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3313                                         return true;
3314                                 }
3315                                 else
3316                                 {
3317                                         // not a special inter-server command.
3318                                         // Emulate the actual user doing the command,
3319                                         // this saves us having a huge ugly parser.
3320                                         userrec* who = this->Instance->FindNick(prefix);
3321                                         std::string sourceserv = this->myhost;
3322                                         if (this->InboundServerName != "")
3323                                         {
3324                                                 sourceserv = this->InboundServerName;
3325                                         }
3326                                         if (who)
3327                                         {
3328                                                 if ((command == "NICK") && (params.size() > 0))
3329                                                 {
3330                                                         /* On nick messages, check that the nick doesnt
3331                                                          * already exist here. If it does, kill their copy,
3332                                                          * and our copy.
3333                                                          */
3334                                                         userrec* x = this->Instance->FindNick(params[0]);
3335                                                         if ((x) && (x != who))
3336                                                         {
3337                                                                 std::deque<std::string> p;
3338                                                                 p.push_back(params[0]);
3339                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3340                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3341                                                                 p.clear();
3342                                                                 p.push_back(prefix);
3343                                                                 p.push_back("Nickname collision");
3344                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3345                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3346                                                                 userrec* y = this->Instance->FindNick(prefix);
3347                                                                 if (y)
3348                                                                 {
3349                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3350                                                                 }
3351                                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3352                                                         }
3353                                                 }
3354                                                 // its a user
3355                                                 target = who->server;
3356                                                 const char* strparams[127];
3357                                                 for (unsigned int q = 0; q < params.size(); q++)
3358                                                 {
3359                                                         strparams[q] = params[q].c_str();
3360                                                 }
3361                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3362                                                 {
3363                                                         case CMD_INVALID:
3364                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3365                                                                 return false;
3366                                                         break;
3367                                                         case CMD_FAILURE:
3368                                                                 return true;
3369                                                         break;
3370                                                         default:
3371                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3372                                                         break;
3373                                                 }
3374                                         }
3375                                         else
3376                                         {
3377                                                 // its not a user. Its either a server, or somethings screwed up.
3378                                                 if (Utils->IsServer(prefix))
3379                                                 {
3380                                                         target = this->Instance->Config->ServerName;
3381                                                 }
3382                                                 else
3383                                                 {
3384                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3385                                                         return true;
3386                                                 }
3387                                         }
3388                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3389
3390                                 }
3391                                 return true;
3392                         break;
3393                 }
3394                 return true;
3395         }
3396
3397         virtual std::string GetName()
3398         {
3399                 std::string sourceserv = this->myhost;
3400                 if (this->InboundServerName != "")
3401                 {
3402                         sourceserv = this->InboundServerName;
3403                 }
3404                 return sourceserv;
3405         }
3406
3407         virtual void OnTimeout()
3408         {
3409                 if (this->LinkState == CONNECTING)
3410                 {
3411                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3412                         Link* MyLink = Utils->FindLink(myhost);
3413                         if (MyLink)
3414                                 Utils->DoFailOver(MyLink);
3415                 }
3416         }
3417
3418         virtual void OnClose()
3419         {
3420                 // Connection closed.
3421                 // If the connection is fully up (state CONNECTED)
3422                 // then propogate a netsplit to all peers.
3423                 std::string quitserver = this->myhost;
3424                 if (this->InboundServerName != "")
3425                 {
3426                         quitserver = this->InboundServerName;
3427                 }
3428                 TreeServer* s = Utils->FindServer(quitserver);
3429                 if (s)
3430                 {
3431                         Squit(s,"Remote host closed the connection");
3432                 }
3433                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3434         }
3435
3436         virtual int OnIncomingConnection(int newsock, char* ip)
3437         {
3438                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3439                  * or discovering if this port is the server port, we don't allow connections from any
3440                  * IPs for which we don't have a link block.
3441                  */
3442                 bool found = false;
3443
3444                 found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
3445                 if (!found)
3446                 {
3447                         for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
3448                                 if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
3449                                         found = true;
3450
3451                         if (!found)
3452                         {
3453                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3454                                 close(newsock);
3455                                 return false;
3456                         }
3457                 }
3458                 TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip);
3459                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3460                 return true;
3461         }
3462 };
3463
3464 /** This class is used to resolve server hostnames during /connect and autoconnect.
3465  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3466  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3467  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3468  * will have an IP address which we can then use to continue our connection.
3469  */
3470 class ServernameResolver : public Resolver
3471 {
3472  private:
3473         /** A copy of the Link tag info for what we're connecting to.
3474          * We take a copy, rather than using a pointer, just in case the
3475          * admin takes the tag away and rehashes while the domain is resolving.
3476          */
3477         Link MyLink;
3478         SpanningTreeUtilities* Utils;
3479  public:
3480         ServernameResolver(SpanningTreeUtilities* Util, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x), Utils(Util)
3481         {
3482                 /* Nothing in here, folks */
3483         }
3484
3485         void OnLookupComplete(const std::string &result)
3486         {
3487                 /* Initiate the connection, now that we have an IP to use.
3488                  * Passing a hostname directly to InspSocket causes it to
3489                  * just bail and set its FD to -1.
3490                  */
3491                 TreeServer* CheckDupe = Utils->FindServer(MyLink.Name.c_str());
3492                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3493                 {
3494                         TreeSocket* newsocket = new TreeSocket(this->Utils, ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3495                         if (newsocket->GetFd() > -1)
3496                         {
3497                                 /* We're all OK */
3498                         }
3499                         else
3500                         {
3501                                 /* Something barfed, show the opers */
3502                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3503                                 delete newsocket;
3504                                 Utils->DoFailOver(&MyLink);
3505                         }
3506                 }
3507         }
3508
3509         void OnError(ResolverError e, const std::string &errormessage)
3510         {
3511                 /* Ooops! */
3512                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3513                 Utils->DoFailOver(&MyLink);
3514         }
3515 };
3516
3517 /** Handle resolving of server IPs for the cache
3518  */
3519 class SecurityIPResolver : public Resolver
3520 {
3521  private:
3522         Link MyLink;
3523         SpanningTreeUtilities* Utils;
3524  public:
3525         SecurityIPResolver(SpanningTreeUtilities* U, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x), Utils(U)
3526         {
3527         }
3528
3529         void OnLookupComplete(const std::string &result)
3530         {
3531                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3532                 Utils->ValidIPs.push_back(result);
3533         }
3534
3535         void OnError(ResolverError e, const std::string &errormessage)
3536         {
3537                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3538         }
3539 };
3540
3541 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
3542 {
3543         Bindings.clear();
3544         this->ReadConfiguration(true);
3545         this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3546 }
3547
3548 SpanningTreeUtilities::~SpanningTreeUtilities()
3549 {
3550         for (unsigned int i = 0; i < Bindings.size(); i++)
3551         {
3552                 ServerInstance->Log(DEBUG,"Freeing binding %d of %d",i, Bindings.size());
3553                 ServerInstance->SE->DelFd(Bindings[i]);
3554                 Bindings[i]->Close();
3555                 DELETE(Bindings[i]);
3556         }
3557         ServerInstance->Log(DEBUG,"Freeing connected servers...");
3558         while (TreeRoot->ChildCount())
3559         {
3560                 TreeServer* child_server = TreeRoot->GetChild(0);
3561                 ServerInstance->Log(DEBUG,"Freeing connected server %s", child_server->GetName().c_str());
3562                 if (child_server)
3563                 {
3564                         TreeSocket* sock = child_server->GetSocket();
3565                         ServerInstance->SE->DelFd(sock);
3566                         sock->Close();
3567                         DELETE(sock);
3568                 }
3569         }
3570         delete TreeRoot;
3571 }
3572
3573 void SpanningTreeUtilities::AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3574 {
3575         for (unsigned int c = 0; c < list.size(); c++)
3576         {
3577                 if (list[c] == server)
3578                 {
3579                         return;
3580                 }
3581         }
3582         list.push_back(server);
3583 }
3584
3585 /** returns a list of DIRECT servernames for a specific channel */
3586 void SpanningTreeUtilities::GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3587 {
3588         CUList *ulist = c->GetUsers();
3589         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3590         {
3591                 if (i->second->GetFd() < 0)
3592                 {
3593                         TreeServer* best = this->BestRouteTo(i->second->server);
3594                         if (best)
3595                                 AddThisServer(best,list);
3596                 }
3597         }
3598         return;
3599 }
3600
3601 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3602 {
3603         TreeServer* omitroute = this->BestRouteTo(omit);
3604         if ((command == "NOTICE") || (command == "PRIVMSG"))
3605         {
3606                 if (params.size() >= 2)
3607                 {
3608                         /* Prefixes */
3609                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3610                         {
3611                                 params[0] = params[0].substr(1, params[0].length()-1);
3612                         }
3613                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3614                         {
3615                                 // special routing for private messages/notices
3616                                 userrec* d = ServerInstance->FindNick(params[0]);
3617                                 if (d)
3618                                 {
3619                                         std::deque<std::string> par;
3620                                         par.push_back(params[0]);
3621                                         par.push_back(":"+params[1]);
3622                                         this->DoOneToOne(prefix,command.c_str(),par,d->server);
3623                                         return true;
3624                                 }
3625                         }
3626                         else if (*(params[0].c_str()) == '$')
3627                         {
3628                                 std::deque<std::string> par;
3629                                 par.push_back(params[0]);
3630                                 par.push_back(":"+params[1]);
3631                                 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3632                                 return true;
3633                         }
3634                         else
3635                         {
3636                                 chanrec* c = ServerInstance->FindChan(params[0]);
3637                                 if (c)
3638                                 {
3639                                         std::deque<TreeServer*> list;
3640                                         GetListOfServersForChannel(c,list);
3641                                         unsigned int lsize = list.size();
3642                                         for (unsigned int i = 0; i < lsize; i++)
3643                                         {
3644                                                 TreeSocket* Sock = list[i]->GetSocket();
3645                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3646                                                 {
3647                                                         Sock->WriteLine(data);
3648                                                 }
3649                                         }
3650                                         return true;
3651                                 }
3652                         }
3653                 }
3654         }
3655         unsigned int items =this->TreeRoot->ChildCount();
3656         for (unsigned int x = 0; x < items; x++)
3657         {
3658                 TreeServer* Route = this->TreeRoot->GetChild(x);
3659                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3660                 {
3661                         TreeSocket* Sock = Route->GetSocket();
3662                         if (Sock)
3663                                 Sock->WriteLine(data);
3664                 }
3665         }
3666         return true;
3667 }
3668
3669 bool SpanningTreeUtilities::DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3670 {
3671         TreeServer* omitroute = this->BestRouteTo(omit);
3672         std::string FullLine = ":" + prefix + " " + command;
3673         unsigned int words = params.size();
3674         for (unsigned int x = 0; x < words; x++)
3675         {
3676                 FullLine = FullLine + " " + params[x];
3677         }
3678         unsigned int items = this->TreeRoot->ChildCount();
3679         for (unsigned int x = 0; x < items; x++)
3680         {
3681                 TreeServer* Route = this->TreeRoot->GetChild(x);
3682                 // Send the line IF:
3683                 // The route has a socket (its a direct connection)
3684                 // The route isnt the one to be omitted
3685                 // The route isnt the path to the one to be omitted
3686                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3687                 {
3688                         TreeSocket* Sock = Route->GetSocket();
3689                         if (Sock)
3690                                 Sock->WriteLine(FullLine);
3691                 }
3692         }
3693         return true;
3694 }
3695
3696 bool SpanningTreeUtilities::DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3697 {
3698         std::string FullLine = ":" + prefix + " " + command;
3699         unsigned int words = params.size();
3700         for (unsigned int x = 0; x < words; x++)
3701         {
3702                 FullLine = FullLine + " " + params[x];
3703         }
3704         unsigned int items = this->TreeRoot->ChildCount();
3705         for (unsigned int x = 0; x < items; x++)
3706         {
3707                 TreeServer* Route = this->TreeRoot->GetChild(x);
3708                 if (Route && Route->GetSocket())
3709                 {
3710                         TreeSocket* Sock = Route->GetSocket();
3711                         if (Sock)
3712                                 Sock->WriteLine(FullLine);
3713                 }
3714         }
3715         return true;
3716 }
3717
3718 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3719 {
3720         std::string spfx = prefix;
3721         std::string scmd = command;
3722         return this->DoOneToMany(spfx, scmd, params);
3723 }
3724
3725 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3726 {
3727         std::string spfx = prefix;
3728         std::string scmd = command;
3729         return this->DoOneToAllButSender(spfx, scmd, params, omit);
3730 }
3731
3732 bool SpanningTreeUtilities::DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3733 {
3734         TreeServer* Route = this->BestRouteTo(target);
3735         if (Route)
3736         {
3737                 std::string FullLine = ":" + prefix + " " + command;
3738                 unsigned int words = params.size();
3739                 for (unsigned int x = 0; x < words; x++)
3740                 {
3741                         FullLine = FullLine + " " + params[x];
3742                 }
3743                 if (Route && Route->GetSocket())
3744                 {
3745                         TreeSocket* Sock = Route->GetSocket();
3746                         if (Sock)
3747                                 Sock->WriteLine(FullLine);
3748                 }
3749                 return true;
3750         }
3751         else
3752         {
3753                 return false;
3754         }
3755 }
3756
3757 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
3758 {
3759         ConfigReader* Conf = new ConfigReader(ServerInstance);
3760         if (rebind)
3761         {
3762                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3763                 {
3764                         std::string Type = Conf->ReadValue("bind","type",j);
3765                         std::string IP = Conf->ReadValue("bind","address",j);
3766                         int Port = Conf->ReadInteger("bind","port",j,true);
3767                         if (Type == "servers")
3768                         {
3769                                 ServerInstance->Log(DEBUG,"m_spanningtree: Binding server port %s:%d", IP.c_str(), Port);
3770                                 if (IP == "*")
3771                                 {
3772                                         IP = "";
3773                                 }
3774                                 TreeSocket* listener = new TreeSocket(this, ServerInstance, IP.c_str(),Port,true,10);
3775                                 if (listener->GetState() == I_LISTENING)
3776                                 {
3777                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), Port);
3778                                         Bindings.push_back(listener);
3779                                 }
3780                                 else
3781                                 {
3782                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3783                                         listener->Close();
3784                                         DELETE(listener);
3785                                 }
3786                                 ServerInstance->Log(DEBUG,"Done with this binding");
3787                         }
3788                 }
3789         }
3790         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3791         HideULines = Conf->ReadFlag("options","hideulines",0);
3792         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
3793         LinkBlocks.clear();
3794         ValidIPs.clear();
3795         for (int j =0; j < Conf->Enumerate("link"); j++)
3796         {
3797                 Link L;
3798                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3799                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3800                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3801                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3802                 L.Port = Conf->ReadInteger("link","port",j,true);
3803                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3804                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3805                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3806                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3807                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3808                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3809                 /* Bugfix by brain, do not allow people to enter bad configurations */
3810                 if (L.Name != ServerInstance->Config->ServerName)
3811                 {
3812                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3813                         {
3814                                 ValidIPs.push_back(L.IPAddr);
3815
3816                                 if (Allow.length())
3817                                         ValidIPs.push_back(Allow);
3818
3819                                 /* Needs resolving */
3820                                 insp_inaddr binip;
3821                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3822                                 {
3823                                         try
3824                                         {
3825                                                 SecurityIPResolver* sr = new SecurityIPResolver(this, ServerInstance, L.IPAddr, L);
3826                                                 ServerInstance->AddResolver(sr);
3827                                         }
3828                                         catch (ModuleException& e)
3829                                         {
3830                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3831                                         }
3832                                 }
3833
3834                                 LinkBlocks.push_back(L);
3835                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3836                         }
3837                         else
3838                         {
3839                                 if (L.IPAddr == "")
3840                                 {
3841                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3842                                 }
3843                                 else if (L.RecvPass == "")
3844                                 {
3845                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3846                                 }
3847                                 else if (L.SendPass == "")
3848                                 {
3849                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3850                                 }
3851                                 else if (L.Name == "")
3852                                 {
3853                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3854                                 }
3855                                 else if (!L.Port)
3856                                 {
3857                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3858                                 }
3859                         }
3860                 }
3861                 else
3862                 {
3863                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3864                 }
3865         }
3866         DELETE(Conf);
3867 }
3868
3869
3870
3871 class ModuleSpanningTree : public Module
3872 {
3873         int line;
3874         int NumServers;
3875         unsigned int max_local;
3876         unsigned int max_global;
3877         cmd_rconnect* command_rconnect;
3878         SpanningTreeUtilities* Utils;
3879
3880  public:
3881
3882         ModuleSpanningTree(InspIRCd* Me)
3883                 : Module::Module(Me), max_local(0), max_global(0)
3884         {
3885                 Utils = new SpanningTreeUtilities(Me, this);
3886
3887                 command_rconnect = new cmd_rconnect(ServerInstance, this, Utils);
3888                 ServerInstance->AddCommand(command_rconnect);
3889         }
3890
3891         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3892         {
3893                 std::string Parent = Utils->TreeRoot->GetName();
3894                 if (Current->GetParent())
3895                 {
3896                         Parent = Current->GetParent()->GetName();
3897                 }
3898                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3899                 {
3900                         if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3901                         {
3902                                 if (*user->oper)
3903                                 {
3904                                          ShowLinks(Current->GetChild(q),user,hops+1);
3905                                 }
3906                         }
3907                         else
3908                         {
3909                                 ShowLinks(Current->GetChild(q),user,hops+1);
3910                         }
3911                 }
3912                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3913                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3914                         return;
3915                 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());
3916         }
3917
3918         int CountLocalServs()
3919         {
3920                 return Utils->TreeRoot->ChildCount();
3921         }
3922
3923         int CountServs()
3924         {
3925                 return Utils->serverlist.size();
3926         }
3927
3928         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3929         {
3930                 ShowLinks(Utils->TreeRoot,user,0);
3931                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3932                 return;
3933         }
3934
3935         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3936         {
3937                 unsigned int n_users = ServerInstance->UserCount();
3938
3939                 /* Only update these when someone wants to see them, more efficient */
3940                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3941                         max_local = ServerInstance->LocalUserCount();
3942                 if (n_users > max_global)
3943                         max_global = n_users;
3944
3945                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3946                 if (ServerInstance->OperCount())
3947                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3948                 if (ServerInstance->UnregisteredUserCount())
3949                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3950                 if (ServerInstance->ChannelCount())
3951                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3952                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3953                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3954                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3955                 return;
3956         }
3957
3958         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3959
3960         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3961         {
3962                 if (line < 128)
3963                 {
3964                         for (int t = 0; t < depth; t++)
3965                         {
3966                                 matrix[line][t] = ' ';
3967                         }
3968
3969                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3970                         // a 'Spacer' String to compensate.
3971                         char spacer[40];
3972
3973                         memset(spacer,' ',40);
3974                         if ((40 - Current->GetName().length() - depth) > 1) {
3975                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3976                         }
3977                         else
3978                         {
3979                                 spacer[5] = '\0';
3980                         }
3981
3982                         float percent;
3983                         char text[80];
3984                         if (ServerInstance->clientlist.size() == 0) {
3985                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3986                                 percent = 0;
3987                         }
3988                         else
3989                         {
3990                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3991                         }
3992                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3993                         totusers += Current->GetUserCount();
3994                         totservers++;
3995                         strlcpy(&matrix[line][depth],text,80);
3996                         line++;
3997                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3998                         {
3999                                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
4000                                 {
4001                                         if (*user->oper)
4002                                         {
4003                                                 ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4004                                         }
4005                                 }
4006                                 else
4007                                 {
4008                                         ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4009                                 }
4010                         }
4011                 }
4012         }
4013
4014         int HandleMotd(const char** parameters, int pcnt, userrec* user)
4015         {
4016                 if (pcnt > 0)
4017                 {
4018                         /* Remote MOTD, the server is within the 1st parameter */
4019                         std::deque<std::string> params;
4020                         params.push_back(parameters[0]);
4021
4022                         /* Send it out remotely, generate no reply yet */
4023                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4024                         if (s)
4025                         {
4026                                 Utils->DoOneToOne(user->nick, "MOTD", params, s->GetName());
4027                         }
4028                         else
4029                         {
4030                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4031                         }
4032                         return 1;
4033                 }
4034                 return 0;
4035         }
4036
4037         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
4038         {
4039                 if (pcnt > 0)
4040                 {
4041                         /* Remote ADMIN, the server is within the 1st parameter */
4042                         std::deque<std::string> params;
4043                         params.push_back(parameters[0]);
4044
4045                         /* Send it out remotely, generate no reply yet */
4046                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4047                         if (s)
4048                         {
4049                                 Utils->DoOneToOne(user->nick, "ADMIN", params, s->GetName());
4050                         }
4051                         else
4052                         {
4053                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4054                         }
4055                         return 1;
4056                 }
4057                 return 0;
4058         }
4059
4060         int HandleStats(const char** parameters, int pcnt, userrec* user)
4061         {
4062                 if (pcnt > 1)
4063                 {
4064                         /* Remote STATS, the server is within the 2nd parameter */
4065                         std::deque<std::string> params;
4066                         params.push_back(parameters[0]);
4067                         params.push_back(parameters[1]);
4068                         /* Send it out remotely, generate no reply yet */
4069                         TreeServer* s = Utils->FindServerMask(parameters[1]);
4070                         if (s)
4071                         {
4072                                 params[1] = s->GetName();
4073                                 Utils->DoOneToOne(user->nick, "STATS", params, s->GetName());
4074                         }
4075                         else
4076                         {
4077                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4078                         }
4079                         return 1;
4080                 }
4081                 return 0;
4082         }
4083
4084         // Ok, prepare to be confused.
4085         // After much mulling over how to approach this, it struck me that
4086         // the 'usual' way of doing a /MAP isnt the best way. Instead of
4087         // keeping track of a ton of ascii characters, and line by line
4088         // under recursion working out where to place them using multiplications
4089         // and divisons, we instead render the map onto a backplane of characters
4090         // (a character matrix), then draw the branches as a series of "L" shapes
4091         // from the nodes. This is not only friendlier on CPU it uses less stack.
4092
4093         void HandleMap(const char** parameters, int pcnt, userrec* user)
4094         {
4095                 // This array represents a virtual screen which we will
4096                 // "scratch" draw to, as the console device of an irc
4097                 // client does not provide for a proper terminal.
4098                 float totusers = 0;
4099                 float totservers = 0;
4100                 char matrix[128][80];
4101                 for (unsigned int t = 0; t < 128; t++)
4102                 {
4103                         matrix[t][0] = '\0';
4104                 }
4105                 line = 0;
4106                 // The only recursive bit is called here.
4107                 ShowMap(Utils->TreeRoot,user,0,matrix,totusers,totservers);
4108                 // Process each line one by one. The algorithm has a limit of
4109                 // 128 servers (which is far more than a spanning tree should have
4110                 // anyway, so we're ok). This limit can be raised simply by making
4111                 // the character matrix deeper, 128 rows taking 10k of memory.
4112                 for (int l = 1; l < line; l++)
4113                 {
4114                         // scan across the line looking for the start of the
4115                         // servername (the recursive part of the algorithm has placed
4116                         // the servers at indented positions depending on what they
4117                         // are related to)
4118                         int first_nonspace = 0;
4119                         while (matrix[l][first_nonspace] == ' ')
4120                         {
4121                                 first_nonspace++;
4122                         }
4123                         first_nonspace--;
4124                         // Draw the `- (corner) section: this may be overwritten by
4125                         // another L shape passing along the same vertical pane, becoming
4126                         // a |- (branch) section instead.
4127                         matrix[l][first_nonspace] = '-';
4128                         matrix[l][first_nonspace-1] = '`';
4129                         int l2 = l - 1;
4130                         // Draw upwards until we hit the parent server, causing possibly
4131                         // other corners (`-) to become branches (|-)
4132                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
4133                         {
4134                                 matrix[l2][first_nonspace-1] = '|';
4135                                 l2--;
4136                         }
4137                 }
4138                 // dump the whole lot to the user. This is the easy bit, honest.
4139                 for (int t = 0; t < line; t++)
4140                 {
4141                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4142                 }
4143                 float avg_users = totusers / totservers;
4144                 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);
4145         user->WriteServ("007 %s :End of /MAP",user->nick);
4146                 return;
4147         }
4148
4149         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4150         {
4151                 TreeServer* s = Utils->FindServerMask(parameters[0]);
4152                 if (s)
4153                 {
4154                         if (s == Utils->TreeRoot)
4155                         {
4156                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4157                                 return 1;
4158                         }
4159                         TreeSocket* sock = s->GetSocket();
4160                         if (sock)
4161                         {
4162                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4163                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4164                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
4165                                 ServerInstance->SE->DelFd(sock);
4166                                 sock->Close();
4167                                 delete sock;
4168                         }
4169                         else
4170                         {
4171                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
4172                         }
4173                 }
4174                 else
4175                 {
4176                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4177                 }
4178                 return 1;
4179         }
4180
4181         int HandleTime(const char** parameters, int pcnt, userrec* user)
4182         {
4183                 if ((IS_LOCAL(user)) && (pcnt))
4184                 {
4185                         TreeServer* found = Utils->FindServerMask(parameters[0]);
4186                         if (found)
4187                         {
4188                                 // we dont' override for local server
4189                                 if (found == Utils->TreeRoot)
4190                                         return 0;
4191
4192                                 std::deque<std::string> params;
4193                                 params.push_back(found->GetName());
4194                                 params.push_back(user->nick);
4195                                 Utils->DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4196                         }
4197                         else
4198                         {
4199                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4200                         }
4201                 }
4202                 return 1;
4203         }
4204
4205         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4206         {
4207                 if ((IS_LOCAL(user)) && (pcnt > 1))
4208                 {
4209                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4210                         if ((remote) && (remote->GetFd() < 0))
4211                         {
4212                                 std::deque<std::string> params;
4213                                 params.push_back(parameters[1]);
4214                                 Utils->DoOneToOne(user->nick,"IDLE",params,remote->server);
4215                                 return 1;
4216                         }
4217                         else if (!remote)
4218                         {
4219                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4220                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4221                                 return 1;
4222                         }
4223                 }
4224                 return 0;
4225         }
4226
4227         void DoPingChecks(time_t curtime)
4228         {
4229                 for (unsigned int j = 0; j < Utils->TreeRoot->ChildCount(); j++)
4230                 {
4231                         TreeServer* serv = Utils->TreeRoot->GetChild(j);
4232                         TreeSocket* sock = serv->GetSocket();
4233                         if (sock)
4234                         {
4235                                 if (curtime >= serv->NextPingTime())
4236                                 {
4237                                         if (serv->AnsweredLastPing())
4238                                         {
4239                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4240                                                 serv->SetNextPingTime(curtime + 60);
4241                                         }
4242                                         else
4243                                         {
4244                                                 // they didnt answer, boot them
4245                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4246                                                 sock->Squit(serv,"Ping timeout");
4247                                                 ServerInstance->SE->DelFd(sock);
4248                                                 sock->Close();
4249                                                 delete sock;
4250                                                 return;
4251                                         }
4252                                 }
4253                         }
4254                 }
4255         }
4256
4257         void ConnectServer(Link* x)
4258         {
4259                 insp_inaddr binip;
4260
4261                 /* Do we already have an IP? If so, no need to resolve it. */
4262                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4263                 {
4264                         TreeSocket* newsocket = new TreeSocket(Utils, ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4265                         if (newsocket->GetFd() > -1)
4266                         {
4267                                 /* Handled automatically on success */
4268                         }
4269                         else
4270                         {
4271                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4272                                 delete newsocket;
4273                                 Utils->DoFailOver(x);
4274                         }
4275                 }
4276                 else
4277                 {
4278                         try
4279                         {
4280                                 ServernameResolver* snr = new ServernameResolver(Utils, ServerInstance,x->IPAddr, *x);
4281                                 ServerInstance->AddResolver(snr);
4282                         }
4283                         catch (ModuleException& e)
4284                         {
4285                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4286                                 Utils->DoFailOver(x);
4287                         }
4288                 }
4289         }
4290
4291         void AutoConnectServers(time_t curtime)
4292         {
4293                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4294                 {
4295                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4296                         {
4297                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4298                                 x->NextConnectTime = curtime + x->AutoConnect;
4299                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4300                                 if (x->FailOver.length())
4301                                 {
4302                                         TreeServer* CheckFailOver = Utils->FindServer(x->FailOver.c_str());
4303                                         if (CheckFailOver)
4304                                         {
4305                                                 /* The failover for this server is currently a member of the network.
4306                                                  * The failover probably succeeded, where the main link did not.
4307                                                  * Don't try the main link until the failover is gone again.
4308                                                  */
4309                                                 continue;
4310                                         }
4311                                 }
4312                                 if (!CheckDupe)
4313                                 {
4314                                         // an autoconnected server is not connected. Check if its time to connect it
4315                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4316                                         this->ConnectServer(&(*x));
4317                                 }
4318                         }
4319                 }
4320         }
4321
4322         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4323         {
4324                 // we've already checked if pcnt > 0, so this is safe
4325                 TreeServer* found = Utils->FindServerMask(parameters[0]);
4326                 if (found)
4327                 {
4328                         std::string Version = found->GetVersion();
4329                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4330                         if (found == Utils->TreeRoot)
4331                         {
4332                                 std::stringstream out(ServerInstance->Config->data005);
4333                                 std::string token = "";
4334                                 std::string line5 = "";
4335                                 int token_counter = 0;
4336
4337                                 while (!out.eof())
4338                                 {
4339                                         out >> token;
4340                                         line5 = line5 + token + " ";
4341                                         token_counter++;
4342
4343                                         if ((token_counter >= 13) || (out.eof() == true))
4344                                         {
4345                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4346                                                 line5 = "";
4347                                                 token_counter = 0;
4348                                         }
4349                                 }
4350                         }
4351                 }
4352                 else
4353                 {
4354                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4355                 }
4356                 return 1;
4357         }
4358
4359         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4360         {
4361                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4362                 {
4363                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4364                         {
4365                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4366                                 if (!CheckDupe)
4367                                 {
4368                                         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);
4369                                         ConnectServer(&(*x));
4370                                         return 1;
4371                                 }
4372                                 else
4373                                 {
4374                                         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());
4375                                         return 1;
4376                                 }
4377                         }
4378                 }
4379                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4380                 return 1;
4381         }
4382
4383         virtual int OnStats(char statschar, userrec* user, string_list &results)
4384         {
4385                 if (statschar == 'c')
4386                 {
4387                         for (unsigned int i = 0; i < Utils->LinkBlocks.size(); i++)
4388                         {
4389                                 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');
4390                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+Utils->LinkBlocks[i].Name.c_str());
4391                         }
4392                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4393                         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);
4394                         return 1;
4395                 }
4396                 return 0;
4397         }
4398
4399         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4400         {
4401                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4402                 if (!validated)
4403                         return 0;
4404
4405                 if (command == "CONNECT")
4406                 {
4407                         return this->HandleConnect(parameters,pcnt,user);
4408                 }
4409                 else if (command == "STATS")
4410                 {
4411                         return this->HandleStats(parameters,pcnt,user);
4412                 }
4413                 else if (command == "MOTD")
4414                 {
4415                         return this->HandleMotd(parameters,pcnt,user);
4416                 }
4417                 else if (command == "ADMIN")
4418                 {
4419                         return this->HandleAdmin(parameters,pcnt,user);
4420                 }
4421                 else if (command == "SQUIT")
4422                 {
4423                         return this->HandleSquit(parameters,pcnt,user);
4424                 }
4425                 else if (command == "MAP")
4426                 {
4427                         this->HandleMap(parameters,pcnt,user);
4428                         return 1;
4429                 }
4430                 else if ((command == "TIME") && (pcnt > 0))
4431                 {
4432                         return this->HandleTime(parameters,pcnt,user);
4433                 }
4434                 else if (command == "LUSERS")
4435                 {
4436                         this->HandleLusers(parameters,pcnt,user);
4437                         return 1;
4438                 }
4439                 else if (command == "LINKS")
4440                 {
4441                         this->HandleLinks(parameters,pcnt,user);
4442                         return 1;
4443                 }
4444                 else if (command == "WHOIS")
4445                 {
4446                         if (pcnt > 1)
4447                         {
4448                                 // remote whois
4449                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4450                         }
4451                 }
4452                 else if ((command == "VERSION") && (pcnt > 0))
4453                 {
4454                         this->HandleVersion(parameters,pcnt,user);
4455                         return 1;
4456                 }
4457
4458                 return 0;
4459         }
4460
4461         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4462         {
4463                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4464                 {
4465                         // this bit of code cleverly routes all module commands
4466                         // to all remote severs *automatically* so that modules
4467                         // can just handle commands locally, without having
4468                         // to have any special provision in place for remote
4469                         // commands and linking protocols.
4470                         std::deque<std::string> params;
4471                         params.clear();
4472                         for (int j = 0; j < pcnt; j++)
4473                         {
4474                                 if (strchr(parameters[j],' '))
4475                                 {
4476                                         params.push_back(":" + std::string(parameters[j]));
4477                                 }
4478                                 else
4479                                 {
4480                                         params.push_back(std::string(parameters[j]));
4481                                 }
4482                         }
4483                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4484                         Utils->DoOneToMany(user->nick,command,params);
4485                 }
4486         }
4487
4488         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4489         {
4490                 TreeServer* s = Utils->FindServer(servername);
4491                 if (s)
4492                 {
4493                         description = s->GetDesc();
4494                 }
4495         }
4496
4497         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4498         {
4499                 if (IS_LOCAL(source))
4500                 {
4501                         std::deque<std::string> params;
4502                         params.push_back(dest->nick);
4503                         params.push_back(channel->name);
4504                         Utils->DoOneToMany(source->nick,"INVITE",params);
4505                 }
4506         }
4507
4508         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4509         {
4510                 std::deque<std::string> params;
4511                 params.push_back(chan->name);
4512                 params.push_back(":"+topic);
4513                 Utils->DoOneToMany(user->nick,"TOPIC",params);
4514         }
4515
4516         virtual void OnWallops(userrec* user, const std::string &text)
4517         {
4518                 if (IS_LOCAL(user))
4519                 {
4520                         std::deque<std::string> params;
4521                         params.push_back(":"+text);
4522                         Utils->DoOneToMany(user->nick,"WALLOPS",params);
4523                 }
4524         }
4525
4526         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4527         {
4528                 if (target_type == TYPE_USER)
4529                 {
4530                         userrec* d = (userrec*)dest;
4531                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4532                         {
4533                                 std::deque<std::string> params;
4534                                 params.clear();
4535                                 params.push_back(d->nick);
4536                                 params.push_back(":"+text);
4537                                 Utils->DoOneToOne(user->nick,"NOTICE",params,d->server);
4538                         }
4539                 }
4540                 else if (target_type == TYPE_CHANNEL)
4541                 {
4542                         if (IS_LOCAL(user))
4543                         {
4544                                 chanrec *c = (chanrec*)dest;
4545                                 if (c)
4546                                 {
4547                                         std::string cname = c->name;
4548                                         if (status)
4549                                                 cname = status + cname;
4550                                         std::deque<TreeServer*> list;
4551                                         Utils->GetListOfServersForChannel(c,list);
4552                                         unsigned int ucount = list.size();
4553                                         for (unsigned int i = 0; i < ucount; i++)
4554                                         {
4555                                                 TreeSocket* Sock = list[i]->GetSocket();
4556                                                 if (Sock)
4557                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4558                                         }
4559                                 }
4560                         }
4561                 }
4562                 else if (target_type == TYPE_SERVER)
4563                 {
4564                         if (IS_LOCAL(user))
4565                         {
4566                                 char* target = (char*)dest;
4567                                 std::deque<std::string> par;
4568                                 par.push_back(target);
4569                                 par.push_back(":"+text);
4570                                 Utils->DoOneToMany(user->nick,"NOTICE",par);
4571                         }
4572                 }
4573         }
4574
4575         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4576         {
4577                 if (target_type == TYPE_USER)
4578                 {
4579                         // route private messages which are targetted at clients only to the server
4580                         // which needs to receive them
4581                         userrec* d = (userrec*)dest;
4582                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4583                         {
4584                                 std::deque<std::string> params;
4585                                 params.clear();
4586                                 params.push_back(d->nick);
4587                                 params.push_back(":"+text);
4588                                 Utils->DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4589                         }
4590                 }
4591                 else if (target_type == TYPE_CHANNEL)
4592                 {
4593                         if (IS_LOCAL(user))
4594                         {
4595                                 chanrec *c = (chanrec*)dest;
4596                                 if (c)
4597                                 {
4598                                         std::string cname = c->name;
4599                                         if (status)
4600                                                 cname = status + cname;
4601                                         std::deque<TreeServer*> list;
4602                                         Utils->GetListOfServersForChannel(c,list);
4603                                         unsigned int ucount = list.size();
4604                                         for (unsigned int i = 0; i < ucount; i++)
4605                                         {
4606                                                 TreeSocket* Sock = list[i]->GetSocket();
4607                                                 if (Sock)
4608                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4609                                         }
4610                                 }
4611                         }
4612                 }
4613                 else if (target_type == TYPE_SERVER)
4614                 {
4615                         if (IS_LOCAL(user))
4616                         {
4617                                 char* target = (char*)dest;
4618                                 std::deque<std::string> par;
4619                                 par.push_back(target);
4620                                 par.push_back(":"+text);
4621                                 Utils->DoOneToMany(user->nick,"PRIVMSG",par);
4622                         }
4623                 }
4624         }
4625
4626         virtual void OnBackgroundTimer(time_t curtime)
4627         {
4628                 AutoConnectServers(curtime);
4629                 DoPingChecks(curtime);
4630         }
4631
4632         virtual void OnUserJoin(userrec* user, chanrec* channel)
4633         {
4634                 // Only do this for local users
4635                 if (IS_LOCAL(user))
4636                 {
4637                         std::deque<std::string> params;
4638                         params.clear();
4639                         params.push_back(channel->name);
4640                         // set up their permissions and the channel TS with FJOIN.
4641                         // All users are FJOINed now, because a module may specify
4642                         // new joining permissions for the user.
4643                         params.clear();
4644                         params.push_back(channel->name);
4645                         params.push_back(ConvToStr(channel->age));
4646                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4647                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4648                 }
4649         }
4650
4651         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4652         {
4653                 // only occurs for local clients
4654                 if (user->registered != REG_ALL)
4655                         return;
4656                 std::deque<std::string> params;
4657                 params.push_back(newhost);
4658                 Utils->DoOneToMany(user->nick,"FHOST",params);
4659         }
4660
4661         virtual void OnChangeName(userrec* user, const std::string &gecos)
4662         {
4663                 // only occurs for local clients
4664                 if (user->registered != REG_ALL)
4665                         return;
4666                 std::deque<std::string> params;
4667                 params.push_back(gecos);
4668                 Utils->DoOneToMany(user->nick,"FNAME",params);
4669         }
4670
4671         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4672         {
4673                 if (IS_LOCAL(user))
4674                 {
4675                         std::deque<std::string> params;
4676                         params.push_back(channel->name);
4677                         if (partmessage != "")
4678                                 params.push_back(":"+partmessage);
4679                         Utils->DoOneToMany(user->nick,"PART",params);
4680                 }
4681         }
4682
4683         virtual void OnUserConnect(userrec* user)
4684         {
4685                 char agestr[MAXBUF];
4686                 if (IS_LOCAL(user))
4687                 {
4688                         std::deque<std::string> params;
4689                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4690                         params.push_back(agestr);
4691                         params.push_back(user->nick);
4692                         params.push_back(user->host);
4693                         params.push_back(user->dhost);
4694                         params.push_back(user->ident);
4695                         params.push_back("+"+std::string(user->FormatModes()));
4696                         params.push_back(user->GetIPString());
4697                         params.push_back(":"+std::string(user->fullname));
4698                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4699
4700                         // User is Local, change needs to be reflected!
4701                         TreeServer* SourceServer = Utils->FindServer(user->server);
4702                         if (SourceServer)
4703                         {
4704                                 SourceServer->AddUserCount();
4705                         }
4706
4707                 }
4708         }
4709
4710         virtual void OnUserQuit(userrec* user, const std::string &reason)
4711         {
4712                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4713                 {
4714                         std::deque<std::string> params;
4715                         params.push_back(":"+reason);
4716                         Utils->DoOneToMany(user->nick,"QUIT",params);
4717                 }
4718                 // Regardless, We need to modify the user Counts..
4719                 TreeServer* SourceServer = Utils->FindServer(user->server);
4720                 if (SourceServer)
4721                 {
4722                         SourceServer->DelUserCount();
4723                 }
4724
4725         }
4726
4727         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4728         {
4729                 if (IS_LOCAL(user))
4730                 {
4731                         std::deque<std::string> params;
4732                         params.push_back(user->nick);
4733                         Utils->DoOneToMany(oldnick,"NICK",params);
4734                 }
4735         }
4736
4737         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4738         {
4739                 if ((source) && (IS_LOCAL(source)))
4740                 {
4741                         std::deque<std::string> params;
4742                         params.push_back(chan->name);
4743                         params.push_back(user->nick);
4744                         params.push_back(":"+reason);
4745                         Utils->DoOneToMany(source->nick,"KICK",params);
4746                 }
4747                 else if (!source)
4748                 {
4749                         std::deque<std::string> params;
4750                         params.push_back(chan->name);
4751                         params.push_back(user->nick);
4752                         params.push_back(":"+reason);
4753                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4754                 }
4755         }
4756
4757         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4758         {
4759                 std::deque<std::string> params;
4760                 params.push_back(dest->nick);
4761                 params.push_back(":"+reason);
4762                 Utils->DoOneToMany(source->nick,"KILL",params);
4763         }
4764
4765         virtual void OnRehash(const std::string &parameter)
4766         {
4767                 if (parameter != "")
4768                 {
4769                         std::deque<std::string> params;
4770                         params.push_back(parameter);
4771                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4772                         // check for self
4773                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4774                         {
4775                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4776                                 ServerInstance->RehashServer();
4777                         }
4778                 }
4779                 Utils->ReadConfiguration(false);
4780         }
4781
4782         // note: the protocol does not allow direct umode +o except
4783         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4784         // locally.
4785         virtual void OnOper(userrec* user, const std::string &opertype)
4786         {
4787                 if (IS_LOCAL(user))
4788                 {
4789                         std::deque<std::string> params;
4790                         params.push_back(opertype);
4791                         Utils->DoOneToMany(user->nick,"OPERTYPE",params);
4792                 }
4793         }
4794
4795         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4796         {
4797                 if (IS_LOCAL(source))
4798                 {
4799                         char type[8];
4800                         snprintf(type,8,"%cLINE",linetype);
4801                         std::string stype = type;
4802                         if (adding)
4803                         {
4804                                 char sduration[MAXBUF];
4805                                 snprintf(sduration,MAXBUF,"%ld",duration);
4806                                 std::deque<std::string> params;
4807                                 params.push_back(host);
4808                                 params.push_back(sduration);
4809                                 params.push_back(":"+reason);
4810                                 Utils->DoOneToMany(source->nick,stype,params);
4811                         }
4812                         else
4813                         {
4814                                 std::deque<std::string> params;
4815                                 params.push_back(host);
4816                                 Utils->DoOneToMany(source->nick,stype,params);
4817                         }
4818                 }
4819         }
4820
4821         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4822         {
4823                 OnLine(source,hostmask,true,'G',duration,reason);
4824         }
4825
4826         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4827         {
4828                 OnLine(source,ipmask,true,'Z',duration,reason);
4829         }
4830
4831         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4832         {
4833                 OnLine(source,nickmask,true,'Q',duration,reason);
4834         }
4835
4836         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4837         {
4838                 OnLine(source,hostmask,true,'E',duration,reason);
4839         }
4840
4841         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4842         {
4843                 OnLine(source,hostmask,false,'G',0,"");
4844         }
4845
4846         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4847         {
4848                 OnLine(source,ipmask,false,'Z',0,"");
4849         }
4850
4851         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4852         {
4853                 OnLine(source,nickmask,false,'Q',0,"");
4854         }
4855
4856         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4857         {
4858                 OnLine(source,hostmask,false,'E',0,"");
4859         }
4860
4861         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4862         {
4863                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4864                 {
4865                         if (target_type == TYPE_USER)
4866                         {
4867                                 userrec* u = (userrec*)dest;
4868                                 std::deque<std::string> params;
4869                                 params.push_back(u->nick);
4870                                 params.push_back(text);
4871                                 Utils->DoOneToMany(user->nick,"MODE",params);
4872                         }
4873                         else
4874                         {
4875                                 chanrec* c = (chanrec*)dest;
4876                                 std::deque<std::string> params;
4877                                 params.push_back(c->name);
4878                                 params.push_back(text);
4879                                 Utils->DoOneToMany(user->nick,"MODE",params);
4880                         }
4881                 }
4882         }
4883
4884         virtual void OnSetAway(userrec* user)
4885         {
4886                 if (IS_LOCAL(user))
4887                 {
4888                         std::deque<std::string> params;
4889                         params.push_back(":"+std::string(user->awaymsg));
4890                         Utils->DoOneToMany(user->nick,"AWAY",params);
4891                 }
4892         }
4893
4894         virtual void OnCancelAway(userrec* user)
4895         {
4896                 if (IS_LOCAL(user))
4897                 {
4898                         std::deque<std::string> params;
4899                         params.clear();
4900                         Utils->DoOneToMany(user->nick,"AWAY",params);
4901                 }
4902         }
4903
4904         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4905         {
4906                 TreeSocket* s = (TreeSocket*)opaque;
4907                 if (target)
4908                 {
4909                         if (target_type == TYPE_USER)
4910                         {
4911                                 userrec* u = (userrec*)target;
4912                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4913                         }
4914                         else
4915                         {
4916                                 chanrec* c = (chanrec*)target;
4917                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4918                         }
4919                 }
4920         }
4921
4922         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4923         {
4924                 TreeSocket* s = (TreeSocket*)opaque;
4925                 if (target)
4926                 {
4927                         if (target_type == TYPE_USER)
4928                         {
4929                                 userrec* u = (userrec*)target;
4930                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4931                         }
4932                         else if (target_type == TYPE_OTHER)
4933                         {
4934                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4935                         }
4936                         else if (target_type == TYPE_CHANNEL)
4937                         {
4938                                 chanrec* c = (chanrec*)target;
4939                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4940                         }
4941                 }
4942         }
4943
4944         virtual void OnEvent(Event* event)
4945         {
4946                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4947
4948                 if (event->GetEventID() == "send_metadata")
4949                 {
4950                         if (params->size() < 3)
4951                                 return;
4952                         (*params)[2] = ":" + (*params)[2];
4953                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4954                 }
4955                 else if (event->GetEventID() == "send_topic")
4956                 {
4957                         if (params->size() < 2)
4958                                 return;
4959                         (*params)[1] = ":" + (*params)[1];
4960                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
4961                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time()));
4962                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
4963                 }
4964                 else if (event->GetEventID() == "send_mode")
4965                 {
4966                         if (params->size() < 2)
4967                                 return;
4968                         // Insert the TS value of the object, either userrec or chanrec
4969                         time_t ourTS = 0;
4970                         userrec* a = ServerInstance->FindNick((*params)[0]);
4971                         if (a)
4972                         {
4973                                 ourTS = a->age;
4974                         }
4975                         else
4976                         {
4977                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4978                                 if (a)
4979                                 {
4980                                         ourTS = a->age;
4981                                 }
4982                         }
4983                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4984                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4985                 }
4986         }
4987
4988         virtual ~ModuleSpanningTree()
4989         {
4990                 ServerInstance->Log(DEBUG,"Performing unload of spanningtree!");
4991                 /* This will also free the listeners */
4992                 delete Utils;
4993         }
4994
4995         virtual Version GetVersion()
4996         {
4997                 return Version(1,1,0,2,VF_VENDOR,API_VERSION);
4998         }
4999
5000         void Implements(char* List)
5001         {
5002                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
5003                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
5004                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
5005                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
5006                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
5007                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
5008                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
5009         }
5010
5011         /* It is IMPORTANT that m_spanningtree is the last module in the chain
5012          * so that any activity it sees is FINAL, e.g. we arent going to send out
5013          * a NICK message before m_cloaking has finished putting the +x on the user,
5014          * etc etc.
5015          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
5016          * the module call queue.
5017          */
5018         Priority Prioritize()
5019         {
5020                 return PRIORITY_LAST;
5021         }
5022 };
5023
5024 void SpanningTreeUtilities::DoFailOver(Link* x)
5025 {
5026         if (x->FailOver.length())
5027         {
5028                 if (x->FailOver == x->Name)
5029                 {
5030                         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());
5031                         return;
5032                 }
5033                 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
5034                 if (TryThisOne)
5035                 {
5036                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
5037                         Creator->ConnectServer(TryThisOne);
5038                 }
5039                 else
5040                 {
5041                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
5042                 }
5043         }
5044 }
5045
5046 Link* SpanningTreeUtilities::FindLink(const std::string& name)
5047 {
5048         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
5049         {
5050                 if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
5051                 {
5052                         return &(*x);
5053                 }
5054         }
5055         return NULL;
5056 }
5057
5058
5059 class ModuleSpanningTreeFactory : public ModuleFactory
5060 {
5061  public:
5062         ModuleSpanningTreeFactory()
5063         {
5064         }
5065
5066         ~ModuleSpanningTreeFactory()
5067         {
5068         }
5069
5070         virtual Module * CreateModule(InspIRCd* Me)
5071         {
5072                 return new ModuleSpanningTree(Me);
5073         }
5074
5075 };
5076
5077
5078 extern "C" void * init_module( void )
5079 {
5080         return new ModuleSpanningTreeFactory;
5081 }