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