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