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