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 <stdio.h>
  22 #include <vector>
  23 #include <deque>
  24 #include "globals.h"
  25 #include "inspircd_config.h"
  26 #include "hash_map.h"
  27 #include "configreader.h"
  28 #include "users.h"
  29 #include "channels.h"
  30 #include "modules.h"
  31 #include "commands.h"
  32 #include "commands/cmd_whois.h"
  33 #include "commands/cmd_stats.h"
  34 #include "socket.h"
  35
  36 #include "inspircd.h"
  37 #include "wildcard.h"
  38 #include "inspstring.h"
  39 #include "hashcomp.h"
  40 #include "xline.h"
  41 #include "typedefs.h"
  42 #include "cull_list.h"
  43 #include "aes.h"
  44
  45 #define nspace __gnu_cxx
  46
  47 /*
  48  * The server list in InspIRCd is maintained as two structures
  49  * which hold the data in different ways. Most of the time, we
  50  * want to very quicky obtain three pieces of information:
  51  *
  52  * (1) The information on a server
  53  * (2) The information on the server we must send data through
  54  *     to actually REACH the server we're after
  55  * (3) Potentially, the child/parent objects of this server
  56  *
  57  * The InspIRCd spanning protocol provides easy access to these
  58  * by storing the data firstly in a recursive structure, where
  59  * each item references its parent item, and a dynamic list
  60  * of child items, and another structure which stores the items
  61  * hashed, linearly. This means that if we want to find a server
  62  * by name quickly, we can look it up in the hash, avoiding
  63  * any O(n) lookups. If however, during a split or sync, we want
  64  * to apply an operation to a server, and any of its child objects
  65  * we can resort to recursion to walk the tree structure.
  66  */
  67
  68 using irc::sockets::MatchCIDR;
  69
  70 class ModuleSpanningTree;
  71 static ModuleSpanningTree* TreeProtocolModule;
  72 static InspIRCd* ServerInstance;
  73
  74 /* Any socket can have one of five states at any one time.
  75  * The LISTENER state indicates a socket which is listening
  76  * for connections. It cannot receive data itself, only incoming
  77  * sockets.
  78  * The CONNECTING state indicates an outbound socket which is
  79  * waiting to be writeable.
  80  * The WAIT_AUTH_1 state indicates the socket is outbound and
  81  * has successfully connected, but has not yet sent and received
  82  * SERVER strings.
  83  * The WAIT_AUTH_2 state indicates that the socket is inbound
  84  * (allocated by a LISTENER) but has not yet sent and received
  85  * SERVER strings.
  86  * The CONNECTED state represents a fully authorized, fully
  87  * connected server.
  88  */
  89 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  90
  91 /* Foward declarations */
  92 class TreeServer;
  93 class TreeSocket;
  94
  95 /* This variable represents the root of the server tree
  96  * (for all intents and purposes, it's us)
  97  */
  98 TreeServer *TreeRoot;
  99
 100 /* This hash_map holds the hash equivalent of the server
 101  * tree, used for rapid linear lookups.
 102  */
 103 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
 104 server_hash serverlist;
 105
 106 typedef nspace::hash_map<std::string, userrec*> uid_hash;
 107 typedef nspace::hash_map<std::string, char*> sid_hash;
 108
 109 /* More forward declarations */
 110 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 111 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 112 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 113 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 114 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 115 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 116 void ReadConfiguration(bool rebind);
 117
 118 /* Flatten links and /MAP for non-opers */
 119 bool FlatLinks;
 120 /* Hide U-Lined servers in /MAP and /LINKS */
 121 bool HideULines;
 122
 123 std::vector<std::string> ValidIPs;
 124
 125 class UserManager : public classbase
 126 {
 127         uid_hash uids;
 128         sid_hash sids;
 129  public:
 130         UserManager()
 131         {
 132                 uids.clear();
 133                 sids.clear();
 134         }
 135
 136         std::string UserToUID(userrec* user)
 137         {
 138                 return "";
 139         }
 140
 141         std::string UIDToUser(const std::string &UID)
 142         {
 143                 return "";
 144         }
 145
 146         std::string CreateAndAdd(userrec* user)
 147         {
 148                 return "";
 149         }
 150
 151         std::string CreateAndAdd(const std::string &servername)
 152         {
 153                 return "";
 154         }
 155
 156         std::string ServerToSID(const std::string &servername)
 157         {
 158                 return "";
 159         }
 160
 161         std::string SIDToServer(const std::string &SID)
 162         {
 163                 return "";
 164         }
 165
 166         userrec* FindByID(const std::string &UID)
 167         {
 168                 return NULL;
 169         }
 170 };
 171
 172
 173 /* Each server in the tree is represented by one class of
 174  * type TreeServer. A locally connected TreeServer can
 175  * have a class of type TreeSocket associated with it, for
 176  * remote servers, the TreeSocket entry will be NULL.
 177  * Each server also maintains a pointer to its parent
 178  * (NULL if this server is ours, at the top of the tree)
 179  * and a pointer to its "Route" (see the comments in the
 180  * constructors below), and also a dynamic list of pointers
 181  * to its children which can be iterated recursively
 182  * if required. Creating or deleting objects of type
 183  i* TreeServer automatically maintains the hash_map of
 184  * TreeServer items, deleting and inserting them as they
 185  * are created and destroyed.
 186  */
 187
 188 class TreeServer : public classbase
 189 {
 190         InspIRCd* ServerInstance;               /* Creator */
 191         TreeServer* Parent;                     /* Parent entry */
 192         TreeServer* Route;                      /* Route entry */
 193         std::vector<TreeServer*> Children;      /* List of child objects */
 194         irc::string ServerName;                 /* Server's name */
 195         std::string ServerDesc;                 /* Server's description */
 196         std::string VersionString;              /* Version string or empty string */
 197         int UserCount;                          /* Not used in this version */
 198         int OperCount;                          /* Not used in this version */
 199         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 200         time_t NextPing;                        /* After this time, the server should be PINGed*/
 201         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 202
 203  public:
 204
 205         /* We don't use this constructor. Its a dummy, and won't cause any insertion
 206          * of the TreeServer into the hash_map. See below for the two we DO use.
 207          */
 208         TreeServer(InspIRCd* Instance) : ServerInstance(Instance)
 209         {
 210                 Parent = NULL;
 211                 ServerName = "";
 212                 ServerDesc = "";
 213                 VersionString = "";
 214                 UserCount = OperCount = 0;
 215                 VersionString = ServerInstance->GetVersionString();
 216         }
 217
 218         /* We use this constructor only to create the 'root' item, TreeRoot, which
 219          * represents our own server. Therefore, it has no route, no parent, and
 220          * no socket associated with it. Its version string is our own local version.
 221          */
 222         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc)
 223         {
 224                 Parent = NULL;
 225                 VersionString = "";
 226                 UserCount = OperCount = 0;
 227                 VersionString = ServerInstance->GetVersionString();
 228                 Route = NULL;
 229                 Socket = NULL; /* Fix by brain */
 230                 AddHashEntry();
 231         }
 232
 233         /* When we create a new server, we call this constructor to initialize it.
 234          * This constructor initializes the server's Route and Parent, and sets up
 235          * its ping counters so that it will be pinged one minute from now.
 236          */
 237         TreeServer(InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 238                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 239         {
 240                 VersionString = "";
 241                 UserCount = OperCount = 0;
 242                 this->SetNextPingTime(time(NULL) + 60);
 243                 this->SetPingFlag();
 244
 245                 /* find the 'route' for this server (e.g. the one directly connected
 246                  * to the local server, which we can use to reach it)
 247                  *
 248                  * In the following example, consider we have just added a TreeServer
 249                  * class for server G on our network, of which we are server A.
 250                  * To route traffic to G (marked with a *) we must send the data to
 251                  * B (marked with a +) so this algorithm initializes the 'Route'
 252                  * value to point at whichever server traffic must be routed through
 253                  * to get here. If we were to try this algorithm with server B,
 254                  * the Route pointer would point at its own object ('this').
 255                  *
 256                  *              A
 257                  *             / \
 258                  *          + B   C
 259                  *           / \   \
 260                  *          D   E   F
 261                  *         /         \
 262                  *      * G           H
 263                  *
 264                  * We only run this algorithm when a server is created, as
 265                  * the routes remain constant while ever the server exists, and
 266                  * do not need to be re-calculated.
 267                  */
 268
 269                 Route = Above;
 270                 if (Route == TreeRoot)
 271                 {
 272                         Route = this;
 273                 }
 274                 else
 275                 {
 276                         while (this->Route->GetParent() != TreeRoot)
 277                         {
 278                                 this->Route = Route->GetParent();
 279                         }
 280                 }
 281
 282                 /* Because recursive code is slow and takes a lot of resources,
 283                  * we store two representations of the server tree. The first
 284                  * is a recursive structure where each server references its
 285                  * children and its parent, which is used for netbursts and
 286                  * netsplits to dump the whole dataset to the other server,
 287                  * and the second is used for very fast lookups when routing
 288                  * messages and is instead a hash_map, where each item can
 289                  * be referenced by its server name. The AddHashEntry()
 290                  * call below automatically inserts each TreeServer class
 291                  * into the hash_map as it is created. There is a similar
 292                  * maintainance call in the destructor to tidy up deleted
 293                  * servers.
 294                  */
 295
 296                 this->AddHashEntry();
 297         }
 298
 299         int QuitUsers(const std::string &reason)
 300         {
 301                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 302                 const char* reason_s = reason.c_str();
 303                 std::vector<userrec*> time_to_die;
 304                 for (user_hash::iterator n = ServerInstance->clientlist.begin(); n != ServerInstance->clientlist.end(); n++)
 305                 {
 306                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 307                         {
 308                                 time_to_die.push_back(n->second);
 309                         }
 310                 }
 311                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 312                 {
 313                         userrec* a = (userrec*)*n;
 314                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 315                         if (!IS_LOCAL(a))
 316                                 userrec::QuitUser(ServerInstance,a,reason_s);
 317                 }
 318                 return time_to_die.size();
 319         }
 320
 321         /* This method is used to add the structure to the
 322          * hash_map for linear searches. It is only called
 323          * by the constructors.
 324          */
 325         void AddHashEntry()
 326         {
 327                 server_hash::iterator iter;
 328                 iter = serverlist.find(this->ServerName.c_str());
 329                 if (iter == serverlist.end())
 330                         serverlist[this->ServerName.c_str()] = this;
 331         }
 332
 333         /* This method removes the reference to this object
 334          * from the hash_map which is used for linear searches.
 335          * It is only called by the default destructor.
 336          */
 337         void DelHashEntry()
 338         {
 339                 server_hash::iterator iter;
 340                 iter = serverlist.find(this->ServerName.c_str());
 341                 if (iter != serverlist.end())
 342                         serverlist.erase(iter);
 343         }
 344
 345         /* These accessors etc should be pretty self-
 346          * explanitory.
 347          */
 348
 349         TreeServer* GetRoute()
 350         {
 351                 return Route;
 352         }
 353
 354         std::string GetName()
 355         {
 356                 return ServerName.c_str();
 357         }
 358
 359         std::string GetDesc()
 360         {
 361                 return ServerDesc;
 362         }
 363
 364         std::string GetVersion()
 365         {
 366                 return VersionString;
 367         }
 368
 369         void SetNextPingTime(time_t t)
 370         {
 371                 this->NextPing = t;
 372                 LastPingWasGood = false;
 373         }
 374
 375         time_t NextPingTime()
 376         {
 377                 return NextPing;
 378         }
 379
 380         bool AnsweredLastPing()
 381         {
 382                 return LastPingWasGood;
 383         }
 384
 385         void SetPingFlag()
 386         {
 387                 LastPingWasGood = true;
 388         }
 389
 390         int GetUserCount()
 391         {
 392                 return UserCount;
 393         }
 394
 395         void AddUserCount()
 396         {
 397                 UserCount++;
 398         }
 399
 400         void DelUserCount()
 401         {
 402                 UserCount--;
 403         }
 404
 405         int GetOperCount()
 406         {
 407                 return OperCount;
 408         }
 409
 410         TreeSocket* GetSocket()
 411         {
 412                 return Socket;
 413         }
 414
 415         TreeServer* GetParent()
 416         {
 417                 return Parent;
 418         }
 419
 420         void SetVersion(std::string Version)
 421         {
 422                 VersionString = Version;
 423         }
 424
 425         unsigned int ChildCount()
 426         {
 427                 return Children.size();
 428         }
 429
 430         TreeServer* GetChild(unsigned int n)
 431         {
 432                 if (n < Children.size())
 433                 {
 434                         /* Make sure they  cant request
 435                          * an out-of-range object. After
 436                          * all we know what these programmer
 437                          * types are like *grin*.
 438                          */
 439                         return Children[n];
 440                 }
 441                 else
 442                 {
 443                         return NULL;
 444                 }
 445         }
 446
 447         void AddChild(TreeServer* Child)
 448         {
 449                 Children.push_back(Child);
 450         }
 451
 452         bool DelChild(TreeServer* Child)
 453         {
 454                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 455                 {
 456                         if (*a == Child)
 457                         {
 458                                 Children.erase(a);
 459                                 return true;
 460                         }
 461                 }
 462                 return false;
 463         }
 464
 465         /* Removes child nodes of this node, and of that node, etc etc.
 466          * This is used during netsplits to automatically tidy up the
 467          * server tree. It is slow, we don't use it for much else.
 468          */
 469         bool Tidy()
 470         {
 471                 bool stillchildren = true;
 472                 while (stillchildren)
 473                 {
 474                         stillchildren = false;
 475                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 476                         {
 477                                 TreeServer* s = (TreeServer*)*a;
 478                                 s->Tidy();
 479                                 Children.erase(a);
 480                                 DELETE(s);
 481                                 stillchildren = true;
 482                                 break;
 483                         }
 484                 }
 485                 return true;
 486         }
 487
 488         ~TreeServer()
 489         {
 490                 /* We'd better tidy up after ourselves, eh? */
 491                 this->DelHashEntry();
 492         }
 493 };
 494
 495 /* The Link class might as well be a struct,
 496  * but this is C++ and we don't believe in structs (!).
 497  * It holds the entire information of one <link>
 498  * tag from the main config file. We maintain a list
 499  * of them, and populate the list on rehash/load.
 500  */
 501
 502 class Link : public classbase
 503 {
 504  public:
 505          irc::string Name;
 506          std::string IPAddr;
 507          int Port;
 508          std::string SendPass;
 509          std::string RecvPass;
 510          unsigned long AutoConnect;
 511          time_t NextConnectTime;
 512          std::string EncryptionKey;
 513          bool HiddenFromStats;
 514 };
 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 class cmd_rconnect : public command_t
 589 {
 590         Module* Creator;
 591  public:
 592         cmd_rconnect (InspIRCd* Instance, Module* Callback) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback)
 593         {
 594                 this->source = "m_spanningtree.so";
 595                 syntax = "<remote-server-mask> <servermask>";
 596         }
 597
 598         void Handle (const char** parameters, int pcnt, userrec *user)
 599         {
 600                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 601                 /* Is this aimed at our server? */
 602                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 603                 {
 604                         /* Yes, initiate the given connect */
 605                         ServerInstance->WriteOpers("*** Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 606                         const char* para[1];
 607                         para[0] = parameters[1];
 608                         Creator->OnPreCommand("CONNECT", para, 1, user, true);
 609                 }
 610         }
 611 };
 612
 613
 614
 615 /* Every SERVER connection inbound or outbound is represented by
 616  * an object of type TreeSocket.
 617  * TreeSockets, being inherited from InspSocket, can be tied into
 618  * the core socket engine, and we cn therefore receive activity events
 619  * for them, just like activex objects on speed. (yes really, that
 620  * is a technical term!) Each of these which relates to a locally
 621  * connected server is assocated with it, by hooking it onto a
 622  * TreeSocket class using its constructor. In this way, we can
 623  * maintain a list of servers, some of which are directly connected,
 624  * some of which are not.
 625  */
 626
 627 class TreeSocket : public InspSocket
 628 {
 629         std::string myhost;
 630         std::string in_buffer;
 631         ServerState LinkState;
 632         std::string InboundServerName;
 633         std::string InboundDescription;
 634         int num_lost_users;
 635         int num_lost_servers;
 636         time_t NextPing;
 637         bool LastPingWasGood;
 638         bool bursting;
 639         AES* ctx_in;
 640         AES* ctx_out;
 641         unsigned int keylength;
 642         std::string ModuleList;
 643         std::map<std::string,std::string> CapKeys;
 644
 645  public:
 646
 647         /* Because most of the I/O gubbins are encapsulated within
 648          * InspSocket, we just call the superclass constructor for
 649          * most of the action, and append a few of our own values
 650          * to it.
 651          */
 652         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime)
 653                 : InspSocket(SI, host, port, listening, maxtime)
 654         {
 655                 myhost = host;
 656                 this->LinkState = LISTENER;
 657                 this->ctx_in = NULL;
 658                 this->ctx_out = NULL;
 659         }
 660
 661         TreeSocket(InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 662                 : InspSocket(SI, host, port, listening, maxtime)
 663         {
 664                 myhost = ServerName;
 665                 this->LinkState = CONNECTING;
 666                 this->ctx_in = NULL;
 667                 this->ctx_out = NULL;
 668         }
 669
 670         /* When a listening socket gives us a new file descriptor,
 671          * we must associate it with a socket without creating a new
 672          * connection. This constructor is used for this purpose.
 673          */
 674         TreeSocket(InspIRCd* SI, int newfd, char* ip)
 675                 : InspSocket(SI, newfd, ip)
 676         {
 677                 this->LinkState = WAIT_AUTH_1;
 678                 this->ctx_in = NULL;
 679                 this->ctx_out = NULL;
 680                 this->SendCapabilities();
 681         }
 682
 683         ~TreeSocket()
 684         {
 685                 if (ctx_in)
 686                         DELETE(ctx_in);
 687                 if (ctx_out)
 688                         DELETE(ctx_out);
 689         }
 690
 691         void InitAES(std::string key,std::string SName)
 692         {
 693                 if (key == "")
 694                         return;
 695
 696                 ctx_in = new AES();
 697                 ctx_out = new AES();
 698                 ServerInstance->Log(DEBUG,"Initialized AES key %s",key.c_str());
 699                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 700                 keylength = key.length();
 701                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 702                 {
 703                         this->Instance->WriteOpers("*** \2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 704                         ServerInstance->Log(DEBUG,"Key length not 16, 24 or 32 characters!");
 705                 }
 706                 else
 707                 {
 708                         this->Instance->WriteOpers("*** \2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 709                         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\
 710                                 \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);
 711                         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\
 712                                 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 713                 }
 714         }
 715
 716         /* When an outbound connection finishes connecting, we receive
 717          * this event, and must send our SERVER string to the other
 718          * side. If the other side is happy, as outlined in the server
 719          * to server docs on the inspircd.org site, the other side
 720          * will then send back its own server string.
 721          */
 722         virtual bool OnConnected()
 723         {
 724                 if (this->LinkState == CONNECTING)
 725                 {
 726                         /* we do not need to change state here. */
 727                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 728                         {
 729                                 if (x->Name == this->myhost)
 730                                 {
 731                                         this->Instance->WriteOpers("*** Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] established.");
 732                                         this->SendCapabilities();
 733                                         if (x->EncryptionKey != "")
 734                                         {
 735                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 736                                                 {
 737                                                         this->Instance->WriteOpers("\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 738                                                 }
 739                                                 else
 740                                                 {
 741                                                         this->WriteLine(std::string("AES ")+this->Instance->Config->ServerName);
 742                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 743                                                 }
 744                                         }
 745                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 746                                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 747                                         return true;
 748                                 }
 749                         }
 750                 }
 751                 /* There is a (remote) chance that between the /CONNECT and the connection
 752                  * being accepted, some muppet has removed the <link> block and rehashed.
 753                  * If that happens the connection hangs here until it's closed. Unlikely
 754                  * and rather harmless.
 755                  */
 756                 this->Instance->WriteOpers("*** Connection to \2"+myhost+"\2 lost link tag(!)");
 757                 return true;
 758         }
 759
 760         virtual void OnError(InspSocketError e)
 761         {
 762                 /* We don't handle this method, because all our
 763                  * dirty work is done in OnClose() (see below)
 764                  * which is still called on error conditions too.
 765                  */
 766                 if (e == I_ERR_CONNECT)
 767                 {
 768                         this->Instance->WriteOpers("*** Connection failed: Connection refused");
 769                 }
 770         }
 771
 772         virtual int OnDisconnect()
 773         {
 774                 /* For the same reason as above, we don't
 775                  * handle OnDisconnect()
 776                  */
 777                 return true;
 778         }
 779
 780         /* Recursively send the server tree with distances as hops.
 781          * This is used during network burst to inform the other server
 782          * (and any of ITS servers too) of what servers we know about.
 783          * If at any point any of these servers already exist on the other
 784          * end, our connection may be terminated. The hopcounts given
 785          * by this function are relative, this doesn't matter so long as
 786          * they are all >1, as all the remote servers re-calculate them
 787          * to be relative too, with themselves as hop 0.
 788          */
 789         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 790         {
 791                 char command[1024];
 792                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 793                 {
 794                         TreeServer* recursive_server = Current->GetChild(q);
 795                         if (recursive_server != s)
 796                         {
 797                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 798                                 this->WriteLine(command);
 799                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 800                                 /* down to next level */
 801                                 this->SendServers(recursive_server, s, hops+1);
 802                         }
 803                 }
 804         }
 805
 806         std::string MyCapabilities()
 807         {
 808                 std::vector<std::string> modlist;
 809                 std::string capabilities = "";
 810
 811                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 812                 {
 813                         if ((this->Instance->modules[i]->GetVersion().Flags & VF_STATIC) || (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON))
 814                                 modlist.push_back(this->Instance->Config->module_names[i]);
 815                 }
 816                 sort(modlist.begin(),modlist.end());
 817                 for (unsigned int i = 0; i < modlist.size(); i++)
 818                 {
 819                         if (i)
 820                                 capabilities = capabilities + ",";
 821                         capabilities = capabilities + modlist[i];
 822                 }
 823                 return capabilities;
 824         }
 825
 826         void SendCapabilities()
 827         {
 828                 irc::commasepstream modulelist(MyCapabilities());
 829
 830                 this->WriteLine("CAPAB START");
 831
 832                 /* Send module names, split at 509 length */
 833                 std::string item = "*";
 834                 std::string line = "CAPAB MODULES ";
 835                 while ((item = modulelist.GetToken()) != "")
 836                 {
 837                         if (line.length() + item.length() + 1 > 509)
 838                         {
 839                                 this->WriteLine(line);
 840                                 line = "CAPAB MODULES ";
 841                         }
 842
 843                         if (line != "CAPAB MODULES ")
 844                                 line.append(",");
 845
 846                         line.append(item);
 847                 }
 848                 if (line != "CAPAB MODULES ")
 849                         this->WriteLine(line);
 850
 851                 int ip6 = 0;
 852                 int ip6support = 0;
 853 #ifdef IPV6
 854                 ip6 = 1;
 855 #endif
 856 #ifdef SUPPORT_IP6LINKS
 857                 ip6support = 1;
 858 #endif
 859                 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));
 860
 861                 this->WriteLine("CAPAB END");
 862         }
 863
 864         /* Check a comma seperated list for an item */
 865         bool HasItem(const std::string &list, const std::string &item)
 866         {
 867                 irc::commasepstream seplist(list);
 868
 869                 std::string item2 = "*";
 870                 while ((item2 = seplist.GetToken()) != "")
 871                 {
 872                         if (item2 == item)
 873                                 return true;
 874                 }
 875
 876                 return false;
 877         }
 878
 879         /* Isolate and return the elements that are different between two comma seperated lists */
 880         std::string ListDifference(const std::string &one, const std::string &two)
 881         {
 882                 irc::commasepstream list_one(one);
 883                 std::string item = "*";
 884                 std::string result = "";
 885                 while ((item = list_one.GetToken()) != "")
 886                 {
 887                         if (!HasItem(two, item))
 888                         {
 889                                 result.append(" ");
 890                                 result.append(item);
 891                         }
 892                 }
 893                 return result;
 894         }
 895
 896         bool Capab(std::deque<std::string> params)
 897         {
 898                 if (params.size() < 1)
 899                 {
 900                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 901                         return false;
 902                 }
 903
 904                 if (params[0] == "START")
 905                 {
 906                         this->ModuleList = "";
 907                         this->CapKeys.clear();
 908                 }
 909                 else if (params[0] == "END")
 910                 {
 911                         std::string reason = "";
 912                         int ip6support = 0;
 913 #ifdef SUPPORT_IP6LINKS
 914                         ip6support = 1;
 915 #endif
 916                         /* Compare ModuleList and check CapKeys...
 917                          * Maybe this could be tidier? -- Brain
 918                          */
 919                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 920                         {
 921                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 922                                 if (!diff.length())
 923                                 {
 924                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 925                                 }
 926                                 else
 927                                 {
 928                                         diff = "this server:" + diff;
 929                                 }
 930                                 if (diff.length() == 12)
 931                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 932                                 else
 933                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 934                         }
 935
 936                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 937                                 reason = "We don't both support linking to IPV6 servers";
 938
 939                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 940                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 941
 942                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 943                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 944
 945                         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))))
 946                                 reason = "We don't both have halfop support enabled/disabled identically";
 947
 948                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 949                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 950
 951                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 952                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 953
 954                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 955                                 reason = "Maximum modes per line differ or remote modes per line not specified";
 956
 957                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 958                                 reason = "Maximum quit lengths differ or remote quit length not specified";
 959
 960                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 961                                 reason = "Maximum topic lengths differ or remote topic length not specified";
 962
 963                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
 964                                 reason = "Maximum kick lengths differ or remote kick length not specified";
 965
 966                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
 967                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
 968
 969                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
 970                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
 971
 972                         if (reason.length())
 973                         {
 974                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
 975                                 return false;
 976                         }
 977                 }
 978                 else if ((params[0] == "MODULES") && (params.size() == 2))
 979                 {
 980                         if (!this->ModuleList.length())
 981                         {
 982                                 this->ModuleList.append(params[1]);
 983                         }
 984                         else
 985                         {
 986                                 this->ModuleList.append(",");
 987                                 this->ModuleList.append(params[1]);
 988                         }
 989                 }
 990                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
 991                 {
 992                         irc::tokenstream capabs(params[1]);
 993                         std::string item = "*";
 994                         while ((item = capabs.GetToken()) != "")
 995                         {
 996                                 /* Process each key/value pair */
 997                                 std::string::size_type equals = item.rfind('=');
 998                                 if (equals != std::string::npos)
 999                                 {
1000                                         std::string var = item.substr(0, equals);
1001                                         std::string value = item.substr(equals+1, item.length());
1002                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1003                                         CapKeys[var] = value;
1004                                 }
1005                         }
1006                 }
1007
1008                 return true;
1009         }
1010
1011         /* This function forces this server to quit, removing this server
1012          * and any users on it (and servers and users below that, etc etc).
1013          * It's very slow and pretty clunky, but luckily unless your network
1014          * is having a REAL bad hair day, this function shouldnt be called
1015          * too many times a month ;-)
1016          */
1017         void SquitServer(std::string &from, TreeServer* Current)
1018         {
1019                 /* recursively squit the servers attached to 'Current'.
1020                  * We're going backwards so we don't remove users
1021                  * while we still need them ;)
1022                  */
1023                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1024                 {
1025                         TreeServer* recursive_server = Current->GetChild(q);
1026                         this->SquitServer(from,recursive_server);
1027                 }
1028                 /* Now we've whacked the kids, whack self */
1029                 num_lost_servers++;
1030                 num_lost_users += Current->QuitUsers(from);
1031         }
1032
1033         /* This is a wrapper function for SquitServer above, which
1034          * does some validation first and passes on the SQUIT to all
1035          * other remaining servers.
1036          */
1037         void Squit(TreeServer* Current,std::string reason)
1038         {
1039                 if ((Current) && (Current != TreeRoot))
1040                 {
1041                         std::deque<std::string> params;
1042                         params.push_back(Current->GetName());
1043                         params.push_back(":"+reason);
1044                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1045                         if (Current->GetParent() == TreeRoot)
1046                         {
1047                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1048                         }
1049                         else
1050                         {
1051                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1052                         }
1053                         num_lost_servers = 0;
1054                         num_lost_users = 0;
1055                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1056                         SquitServer(from, Current);
1057                         Current->Tidy();
1058                         Current->GetParent()->DelChild(Current);
1059                         DELETE(Current);
1060                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1061                 }
1062                 else
1063                 {
1064                         ServerInstance->Log(DEFAULT,"Squit from unknown server");
1065                 }
1066         }
1067
1068         /* FMODE command - server mode with timestamp checks */
1069         bool ForceMode(std::string source, std::deque<std::string> &params)
1070         {
1071                 /* Chances are this is a 1.0 FMODE without TS */
1072                 if (params.size() < 3)
1073                 {
1074                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
1075                         return false;
1076                 }
1077
1078                 bool smode = false;
1079                 std::string sourceserv;
1080
1081                 /* Are we dealing with an FMODE from a user, or from a server? */
1082                 userrec* who = this->Instance->FindNick(source);
1083                 if (who)
1084                 {
1085                         /* FMODE from a user, set sourceserv to the users server name */
1086                         sourceserv = who->server;
1087                 }
1088                 else
1089                 {
1090                         /* FMODE from a server, create a fake user to receive mode feedback */
1091                         who = new userrec(this->Instance);
1092                         who->SetFd(FD_MAGIC_NUMBER);
1093                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1094                         sourceserv = source;    /* Set sourceserv to the actual source string */
1095                 }
1096                 const char* modelist[64];
1097                 time_t TS = 0;
1098                 int n = 0;
1099                 memset(&modelist,0,sizeof(modelist));
1100                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1101                 {
1102                         if (q == 1)
1103                         {
1104                                 /* The timestamp is in this position.
1105                                  * We don't want to pass that up to the
1106                                  * server->client protocol!
1107                                  */
1108                                 TS = atoi(params[q].c_str());
1109                         }
1110                         else
1111                         {
1112                                 /* Everything else is fine to append to the modelist */
1113                                 modelist[n++] = params[q].c_str();
1114                         }
1115
1116                 }
1117                 /* Extract the TS value of the object, either userrec or chanrec */
1118                 userrec* dst = this->Instance->FindNick(params[0]);
1119                 chanrec* chan = NULL;
1120                 time_t ourTS = 0;
1121                 if (dst)
1122                 {
1123                         ourTS = dst->age;
1124                 }
1125                 else
1126                 {
1127                         chan = this->Instance->FindChan(params[0]);
1128                         if (chan)
1129                         {
1130                                 ourTS = chan->age;
1131                         }
1132                 }
1133
1134                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1135                  * with parameters.
1136                  */
1137                 if (TS == ourTS)
1138                 {
1139                         ServerInstance->Log(DEBUG,"Entering TS equality check");
1140                         ModeHandler* mh = NULL;
1141                         unsigned long paramptr = 3;
1142                         std::string to_bounce = "";
1143                         std::string to_keep = "";
1144                         std::vector<std::string> params_to_keep;
1145                         std::string params_to_bounce = "";
1146                         bool adding = true;
1147                         char cur_change = 1;
1148                         char old_change = 0;
1149                         char old_bounce_change = 0;
1150                         /* Merge modes, basically do special stuff to mode with params */
1151                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1152                         {
1153                                 switch (*x)
1154                                 {
1155                                         case '-':
1156                                                 adding = false;
1157                                         break;
1158                                         case '+':
1159                                                 adding = true;
1160                                         break;
1161                                         default:
1162                                                 if (adding)
1163                                                 {
1164                                                         /* We only care about whats being set,
1165                                                          * not whats being unset
1166                                                          */
1167                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1168
1169                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1170                                                         {
1171                                                                 /* We only want to do special things to
1172                                                                  * modes with parameters, we are going to rewrite
1173                                                                  * those parameters
1174                                                                  */
1175                                                                 ModePair ret;
1176                                                                 adding ? cur_change = '+' : cur_change = '-';
1177
1178                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1179
1180                                                                 /* The mode is set here, check which we should keep */
1181                                                                 if (ret.first)
1182                                                                 {
1183                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1184
1185                                                                         if (which_to_keep == true)
1186                                                                         {
1187                                                                                 /* Keep ours, bounce theirs:
1188                                                                                  * Send back ours to them and
1189                                                                                  * drop their mode changs
1190                                                                                  */
1191                                                                                 adding ? cur_change = '+' : cur_change = '-';
1192                                                                                 if (cur_change != old_bounce_change)
1193                                                                                         to_bounce += cur_change;
1194                                                                                 to_bounce += *x;
1195                                                                                 old_bounce_change = cur_change;
1196
1197                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1198                                                                                         params_to_bounce.append(" ").append(ret.second);
1199                                                                         }
1200                                                                         else
1201                                                                         {
1202                                                                                 /* Keep theirs: Accept their mode change,
1203                                                                                  * do nothing else
1204                                                                                  */
1205                                                                                 adding ? cur_change = '+' : cur_change = '-';
1206                                                                                 if (cur_change != old_change)
1207                                                                                         to_keep += cur_change;
1208                                                                                 to_keep += *x;
1209                                                                                 old_change = cur_change;
1210
1211                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1212                                                                                         params_to_keep.push_back(params[paramptr]);
1213                                                                         }
1214                                                                 }
1215                                                                 else
1216                                                                 {
1217                                                                         /* Mode isnt set here, we want it */
1218                                                                         adding ? cur_change = '+' : cur_change = '-';
1219                                                                         if (cur_change != old_change)
1220                                                                                 to_keep += cur_change;
1221                                                                         to_keep += *x;
1222                                                                         old_change = cur_change;
1223
1224                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1225                                                                                 params_to_keep.push_back(params[paramptr]);
1226                                                                 }
1227
1228                                                                 paramptr++;
1229                                                         }
1230                                                         else
1231                                                         {
1232                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1233
1234                                                                 if (mh)
1235                                                                 {
1236                                                                         adding ? cur_change = '+' : cur_change = '-';
1237
1238                                                                         /* Just keep this, safe to merge with no checks
1239                                                                          * it has no parameters
1240                                                                          */
1241
1242                                                                         if (cur_change != old_change)
1243                                                                                 to_keep += cur_change;
1244                                                                         to_keep += *x;
1245                                                                         old_change = cur_change;
1246
1247                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1248                                                                         {
1249                                                                                 ServerInstance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1250                                                                                 params_to_keep.push_back(params[paramptr++]);
1251                                                                         }
1252                                                                 }
1253                                                         }
1254                                                 }
1255                                                 else
1256                                                 {
1257                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1258
1259                                                         if (mh)
1260                                                         {
1261                                                                 /* Taking a mode away */
1262                                                                 adding ? cur_change = '+' : cur_change = '-';
1263
1264                                                                 if (cur_change != old_change)
1265                                                                         to_keep += cur_change;
1266                                                                 to_keep += *x;
1267                                                                 old_change = cur_change;
1268
1269                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1270                                                                         params_to_keep.push_back(params[paramptr++]);
1271                                                         }
1272                                                 }
1273                                         break;
1274                                 }
1275                         }
1276
1277                         if (to_bounce.length())
1278                         {
1279                                 std::deque<std::string> newparams;
1280                                 newparams.push_back(params[0]);
1281                                 newparams.push_back(ConvToStr(ourTS));
1282                                 newparams.push_back(to_bounce+params_to_bounce);
1283                                 DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1284                         }
1285
1286                         if (to_keep.length())
1287                         {
1288                                 unsigned int n = 2;
1289                                 unsigned int q = 0;
1290                                 modelist[0] = params[0].c_str();
1291                                 modelist[1] = to_keep.c_str();
1292
1293                                 if (params_to_keep.size() > 2)
1294                                 {
1295                                         for (q = 2; (q < params_to_keep.size()) && (q < 64); q++)
1296                                         {
1297                                                 ServerInstance->Log(DEBUG,"Item %d of %d", q, params_to_keep.size());
1298                                                 modelist[n++] = params_to_keep[q].c_str();
1299                                         }
1300                                 }
1301
1302                                 if (smode)
1303                                 {
1304                                         ServerInstance->Log(DEBUG,"Send mode");
1305                                         this->Instance->SendMode(modelist, n+2, who);
1306                                 }
1307                                 else
1308                                 {
1309                                         ServerInstance->Log(DEBUG,"Send mode client");
1310                                         this->Instance->CallCommandHandler("MODE", modelist, n+2, who);
1311                                 }
1312
1313                                 /* HOT POTATO! PASS IT ON! */
1314                                 DoOneToAllButSender(source,"FMODE",params,sourceserv);
1315                         }
1316                 }
1317                 else
1318                 /* U-lined servers always win regardless of their TS */
1319                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1320                 {
1321                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1322                          * SHOULD accept it, if its clock is right.
1323                          *
1324                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1325                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1326                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1327                          *
1328                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1329                          * writing the code. It took me a while to come up with this solution.
1330                          *
1331                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1332                          */
1333
1334                         std::deque<std::string> newparams;      /* New parameter list we send back */
1335                         newparams.push_back(params[0]);         /* Target, user or channel */
1336                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1337                         newparams.push_back("");                /* This contains the mode string. For now
1338                                                                  * it's empty, we fill it below.
1339                                                                  */
1340
1341                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1342                          * set to avoid a desync here.
1343                          */
1344                         std::string modebounce = "";
1345                         bool adding = true;
1346                         unsigned int t = 3;
1347                         ModeHandler* mh = NULL;
1348                         char cur_change = 1;
1349                         char old_change = 0;
1350                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1351                         {
1352                                 /* Iterate over all mode chars in the sent set */
1353                                 switch (*x)
1354                                 {
1355                                         /* Adding or subtracting modes? */
1356                                         case '-':
1357                                                 adding = false;
1358                                         break;
1359                                         case '+':
1360                                                 adding = true;
1361                                         break;
1362                                         default:
1363                                                 /* Find the mode handler for this mode */
1364                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1365
1366                                                 /* Got a mode handler?
1367                                                  * This also prevents us bouncing modes we have no handler for.
1368                                                  */
1369                                                 if (mh)
1370                                                 {
1371                                                         ModePair ret;
1372                                                         std::string p = "";
1373
1374                                                         /* Does the mode require a parameter right now?
1375                                                          * If it does, fetch it if we can
1376                                                          */
1377                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1378                                                                 p = params[t++];
1379
1380                                                         /* Call the ModeSet method to determine if its set with the
1381                                                          * given parameter here or not.
1382                                                          */
1383                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1384
1385                                                         /* XXX: Really. Dont ask.
1386                                                          * Determine from if its set combined with what the current
1387                                                          * 'state' is (adding or not) as to wether we should 'invert'
1388                                                          * or 'reinforce' the mode change
1389                                                          */
1390                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1391
1392                                                         /* Quickly determine if we have 'flipped' from + to -,
1393                                                          * or - to +, to prevent unneccessary +/- chars in the
1394                                                          * output string that waste bandwidth
1395                                                          */
1396                                                         if (cur_change != old_change)
1397                                                                 modebounce += cur_change;
1398                                                         old_change = cur_change;
1399
1400                                                         /* Add the mode character to the output string */
1401                                                         modebounce += mh->GetModeChar();
1402
1403                                                         /* We got a parameter back from ModeHandler::ModeSet,
1404                                                          * are we supposed to be sending one out right now?
1405                                                          */
1406                                                         if (ret.second.length())
1407                                                         {
1408                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1409                                                                         /* Yes we're supposed to be sending out
1410                                                                          * the parameter. Make sure it goes
1411                                                                          */
1412                                                                         newparams.push_back(ret.second);
1413                                                         }
1414
1415                                                 }
1416                                         break;
1417                                 }
1418                         }
1419
1420                         /* Update the parameters for FMODE with the new 'bounced' string */
1421                         newparams[2] = modebounce;
1422                         /* Only send it back the way it came, no need to send it anywhere else */
1423                         DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1424                         ServerInstance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1425                 }
1426                 else
1427                 {
1428                         ServerInstance->Log(DEBUG,"Allow modes, TS lower for sender");
1429                         /* The server was ulined, but something iffy is up with the TS.
1430                          * Sound the alarm bells!
1431                          */
1432                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1433                         {
1434                                 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());
1435                         }
1436                         /* Allow the mode, route it to either server or user command handling */
1437                         if (smode)
1438                                 this->Instance->SendMode(modelist,n,who);
1439                         else
1440                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1441
1442                         /* HOT POTATO! PASS IT ON! */
1443                         DoOneToAllButSender(source,"FMODE",params,sourceserv);
1444                 }
1445                 /* Are we supposed to free the userrec? */
1446                 if (smode)
1447                         DELETE(who);
1448
1449                 return true;
1450         }
1451
1452         /* FTOPIC command */
1453         bool ForceTopic(std::string source, std::deque<std::string> &params)
1454         {
1455                 if (params.size() != 4)
1456                         return true;
1457                 time_t ts = atoi(params[1].c_str());
1458                 std::string nsource = source;
1459
1460                 chanrec* c = this->Instance->FindChan(params[0]);
1461                 if (c)
1462                 {
1463                         if ((ts >= c->topicset) || (!*c->topic))
1464                         {
1465                                 std::string oldtopic = c->topic;
1466                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1467                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1468                                 c->topicset = ts;
1469                                 /* if the topic text is the same as the current topic,
1470                                  * dont bother to send the TOPIC command out, just silently
1471                                  * update the set time and set nick.
1472                                  */
1473                                 if (oldtopic != params[3])
1474                                 {
1475                                         userrec* user = this->Instance->FindNick(source);
1476                                         if (!user)
1477                                         {
1478                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1479                                         }
1480                                         else
1481                                         {
1482                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1483                                                 nsource = user->server;
1484                                         }
1485                                         /* all done, send it on its way */
1486                                         params[3] = ":" + params[3];
1487                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
1488                                 }
1489                         }
1490
1491                 }
1492
1493                 return true;
1494         }
1495
1496         /* FJOIN, similar to unreal SJOIN */
1497         bool ForceJoin(std::string source, std::deque<std::string> &params)
1498         {
1499                 if (params.size() < 3)
1500                         return true;
1501
1502                 char first[MAXBUF];
1503                 char modestring[MAXBUF];
1504                 char* mode_users[127];
1505                 memset(&mode_users,0,sizeof(mode_users));
1506                 mode_users[0] = first;
1507                 mode_users[1] = modestring;
1508                 strcpy(modestring,"+");
1509                 unsigned int modectr = 2;
1510
1511                 userrec* who = NULL;
1512                 std::string channel = params[0];
1513                 time_t TS = atoi(params[1].c_str());
1514                 char* key = "";
1515
1516                 chanrec* chan = this->Instance->FindChan(channel);
1517                 if (chan)
1518                 {
1519                         key = chan->key;
1520                 }
1521                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1522
1523                 /* default is a high value, which if we dont have this
1524                  * channel will let the other side apply their modes.
1525                  */
1526                 time_t ourTS = time(NULL)+600;
1527                 chanrec* us = this->Instance->FindChan(channel);
1528                 if (us)
1529                 {
1530                         ourTS = us->age;
1531                 }
1532
1533                 ServerInstance->Log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
1534
1535                 irc::tokenstream users(params[2]);
1536                 std::string item = "*";
1537
1538                 /* do this first, so our mode reversals are correctly received by other servers
1539                  * if there is a TS collision.
1540                  */
1541                 params[2] = ":" + params[2];
1542                 DoOneToAllButSender(source,"FJOIN",params,source);
1543                 while (item != "")
1544                 {
1545                         item = users.GetToken();
1546                         /* process one user at a time, applying modes. */
1547                         char* usr = (char*)item.c_str();
1548                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1549                          * (is this even possible?) */
1550                         if (usr && *usr)
1551                         {
1552                                 char* permissions = usr;
1553                                 int ntimes = 0;
1554                                 while ((*permissions) && (*permissions != ','))
1555                                 {
1556                                         ModeHandler* mh = ServerInstance->Modes->FindPrefix(*permissions);
1557                                         if (mh)
1558                                         {
1559                                                 ntimes++;
1560                                                 charlcat(modestring,mh->GetModeChar(),MAXBUF);
1561                                         }
1562                                         else
1563                                         {
1564                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",mh->GetPrefix());
1565                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+mh->GetModeChar()+"' in FJOIN");
1566                                                 return false;
1567                                         }
1568                                         usr++;
1569                                         permissions++;
1570                                 }
1571                                 usr++;
1572
1573                                 /* Did they get any modes? How many times? */
1574                                 for (int k = 0; k < ntimes; k++)
1575                                         mode_users[modectr++] = strdup(usr); // XXX
1576
1577                                 who = this->Instance->FindNick(usr);
1578                                 if (who)
1579                                 {
1580                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, key);
1581                                         if (modectr >= (MAXMODES-1))
1582                                         {
1583                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1584                                                  * if there are more than MAXMODES to go.
1585                                                  */
1586                                                 if ((ourTS >= TS) || (this->Instance->ULine(who->server)))
1587                                                 {
1588                                                         /* We also always let u-lined clients win, no matter what the TS value */
1589                                                         ServerInstance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1590                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1591                                                         if (ourTS != TS)
1592                                                         {
1593                                                                 ServerInstance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1594                                                                 us->age = TS;
1595                                                                 ourTS = TS;
1596                                                         }
1597                                                 }
1598                                                 else
1599                                                 {
1600                                                         ServerInstance->Log(DEBUG,"Their channel newer than ours, bouncing their modes");
1601                                                         /* bouncy bouncy! */
1602                                                         std::deque<std::string> params;
1603                                                         /* modes are now being UNSET... */
1604                                                         *mode_users[1] = '-';
1605                                                         for (unsigned int x = 0; x < modectr; x++)
1606                                                         {
1607                                                                 if (x == 1)
1608                                                                 {
1609                                                                         params.push_back(ConvToStr(us->age));
1610                                                                 }
1611                                                                 params.push_back(mode_users[x]);
1612
1613                                                         }
1614                                                         // tell everyone to bounce the modes. bad modes, bad!
1615                                                         DoOneToMany(this->Instance->Config->ServerName,"FMODE",params);
1616                                                 }
1617                                                 strcpy(mode_users[1],"+");
1618                                                 for (unsigned int f = 2; f < modectr; f++)
1619                                                         free(mode_users[f]);
1620                                                 modectr = 2;
1621                                         }
1622                                 }
1623                                 else
1624                                 {
1625                                         for (unsigned int f = 2; f < modectr; f++)
1626                                                 free(mode_users[f]);
1627
1628                                         this->WriteLine("ERROR :Invalid user '"+std::string(usr)+"' in FJOIN to '"+channel+"'");
1629                                         return false;
1630                                 }
1631                         }
1632                 }
1633                 /* there werent enough modes built up to flush it during FJOIN,
1634                  * or, there are a number left over. flush them out.
1635                  */
1636                 if ((modectr > 2) && (who) && (us))
1637                 {
1638                         if (ourTS >= TS)
1639                         {
1640                                 ServerInstance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1641                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1642                                 if (ourTS != TS)
1643                                 {
1644                                         ServerInstance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1645                                         us->age = TS;
1646                                         ourTS = TS;
1647                                 }
1648                         }
1649                         else
1650                         {
1651                                 ServerInstance->Log(DEBUG,"Their channel newer than ours, bouncing their modes");
1652                                 std::deque<std::string> params;
1653                                 *mode_users[1] = '-';
1654                                 for (unsigned int x = 0; x < modectr; x++)
1655                                 {
1656                                         if (x == 1)
1657                                         {
1658                                                 params.push_back(ConvToStr(us->age));
1659                                         }
1660                                         params.push_back(mode_users[x]);
1661                                 }
1662                                 DoOneToMany(this->Instance->Config->ServerName,"FMODE",params);
1663                         }
1664
1665                         for (unsigned int f = 2; f < modectr; f++)
1666                                 free(mode_users[f]);
1667                 }
1668                 return true;
1669         }
1670
1671         bool SyncChannelTS(std::string source, std::deque<std::string> &params)
1672         {
1673                 if (params.size() >= 2)
1674                 {
1675                         chanrec* c = this->Instance->FindChan(params[0]);
1676                         if (c)
1677                         {
1678                                 time_t theirTS = atoi(params[1].c_str());
1679                                 time_t ourTS = c->age;
1680                                 if (ourTS >= theirTS)
1681                                 {
1682                                         ServerInstance->Log(DEBUG,"Updating timestamp for %s, our timestamp was %lu and theirs is %lu",c->name,ourTS,theirTS);
1683                                         c->age = theirTS;
1684                                 }
1685                         }
1686                 }
1687                 DoOneToAllButSender(this->Instance->Config->ServerName,"SYNCTS",params,source);
1688                 return true;
1689         }
1690
1691         /* NICK command */
1692         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1693         {
1694                 if (params.size() < 8)
1695                         return true;
1696                 if (params.size() > 8)
1697                 {
1698                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1699                         return true;
1700                 }
1701                 // NICK age nick host dhost ident +modes ip :gecos
1702                 //       0    1   2     3     4      5   6     7
1703                 time_t age = atoi(params[0].c_str());
1704
1705                 /* This used to have a pretty craq'y loop doing the same thing,
1706                  * now we just let the STL do the hard work (more efficiently)
1707                  */
1708                 params[5] = params[5].substr(params[5].find_first_not_of('+'));
1709
1710                 const char* tempnick = params[1].c_str();
1711                 ServerInstance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1712
1713                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1714
1715                 if (iter != this->Instance->clientlist.end())
1716                 {
1717                         // nick collision
1718                         ServerInstance->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);
1719                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1720                         return true;
1721                 }
1722
1723                 userrec* _new = new userrec(this->Instance);
1724                 this->Instance->clientlist[tempnick] = _new;
1725                 _new->SetFd(FD_MAGIC_NUMBER);
1726                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1727                 strlcpy(_new->host, params[2].c_str(),63);
1728                 strlcpy(_new->dhost, params[3].c_str(),63);
1729                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1730                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1731                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1732                 _new->registered = REG_ALL;
1733                 _new->signon = age;
1734
1735                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1736                         _new->modes[(*v)-65] = 1;
1737
1738 #ifdef SUPPORT_IP6LINKS
1739                 if (params[6].find_first_of(":") != std::string::npos)
1740                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1741                 else
1742 #endif
1743                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1744
1745                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1746
1747                 params[7] = ":" + params[7];
1748                 DoOneToAllButSender(source,"NICK",params,source);
1749
1750                 // Increment the Source Servers User Count..
1751                 TreeServer* SourceServer = FindServer(source);
1752                 if (SourceServer)
1753                 {
1754                         ServerInstance->Log(DEBUG,"Found source server of %s",_new->nick);
1755                         SourceServer->AddUserCount();
1756                 }
1757
1758                 return true;
1759         }
1760
1761         /* Send one or more FJOINs for a channel of users.
1762          * If the length of a single line is more than 480-NICKMAX
1763          * in length, it is split over multiple lines.
1764          */
1765         void SendFJoins(TreeServer* Current, chanrec* c)
1766         {
1767                 ServerInstance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1768                 char list[MAXBUF];
1769                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1770
1771                 size_t dlen, curlen;
1772                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1773                 int numusers = 0;
1774                 char* ptr = list + dlen;
1775
1776                 CUList *ulist = c->GetUsers();
1777                 std::vector<userrec*> specific_halfop;
1778                 std::vector<userrec*> specific_voice;
1779                 std::string modes = "";
1780                 std::string params = "";
1781
1782                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1783                 {
1784                         // The first parameter gets a : before it
1785                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1786
1787                         curlen += ptrlen;
1788                         ptr += ptrlen;
1789
1790                         numusers++;
1791
1792                         if (curlen > (480-NICKMAX))
1793                         {
1794                                 this->WriteLine(list);
1795                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1796                                 ptr = list + dlen;
1797                                 ptrlen = 0;
1798                                 numusers = 0;
1799                         }
1800                 }
1801
1802                 if (numusers)
1803                         this->WriteLine(list);
1804
1805                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1806                 {
1807                         modes.append("b");
1808                         params.append(b->data).append(" ");
1809                 }
1810                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1811         }
1812
1813         /* Send G, Q, Z and E lines */
1814         void SendXLines(TreeServer* Current)
1815         {
1816                 char data[MAXBUF];
1817                 std::string n = this->Instance->Config->ServerName;
1818                 const char* sn = n.c_str();
1819                 int iterations = 0;
1820                 /* Yes, these arent too nice looking, but they get the job done */
1821                 for (std::vector<ZLine>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1822                 {
1823                         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);
1824                         this->WriteLine(data);
1825                 }
1826                 for (std::vector<QLine>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1827                 {
1828                         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);
1829                         this->WriteLine(data);
1830                 }
1831                 for (std::vector<GLine>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1832                 {
1833                         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);
1834                         this->WriteLine(data);
1835                 }
1836                 for (std::vector<ELine>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1837                 {
1838                         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);
1839                         this->WriteLine(data);
1840                 }
1841                 for (std::vector<ZLine>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1842                 {
1843                         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);
1844                         this->WriteLine(data);
1845                 }
1846                 for (std::vector<QLine>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1847                 {
1848                         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);
1849                         this->WriteLine(data);
1850                 }
1851                 for (std::vector<GLine>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1852                 {
1853                         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);
1854                         this->WriteLine(data);
1855                 }
1856                 for (std::vector<ELine>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1857                 {
1858                         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);
1859                         this->WriteLine(data);
1860                 }
1861         }
1862
1863         /* Send channel modes and topics */
1864         void SendChannelModes(TreeServer* Current)
1865         {
1866                 char data[MAXBUF];
1867                 std::deque<std::string> list;
1868                 int iterations = 0;
1869                 std::string n = this->Instance->Config->ServerName;
1870                 const char* sn = n.c_str();
1871                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1872                 {
1873                         SendFJoins(Current, c->second);
1874                         if (*c->second->topic)
1875                         {
1876                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1877                                 this->WriteLine(data);
1878                         }
1879                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1880                         list.clear();
1881                         c->second->GetExtList(list);
1882                         for (unsigned int j = 0; j < list.size(); j++)
1883                         {
1884                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1885                         }
1886                 }
1887         }
1888
1889         /* send all users and their oper state/modes */
1890         void SendUsers(TreeServer* Current)
1891         {
1892                 char data[MAXBUF];
1893                 std::deque<std::string> list;
1894                 int iterations = 0;
1895                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
1896                 {
1897                         if (u->second->registered == REG_ALL)
1898                         {
1899                                 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);
1900                                 this->WriteLine(data);
1901                                 if (*u->second->oper)
1902                                 {
1903                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1904                                 }
1905                                 if (*u->second->awaymsg)
1906                                 {
1907                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1908                                 }
1909                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1910                                 list.clear();
1911                                 u->second->GetExtList(list);
1912                                 for (unsigned int j = 0; j < list.size(); j++)
1913                                 {
1914                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1915                                 }
1916                         }
1917                 }
1918         }
1919
1920         /* This function is called when we want to send a netburst to a local
1921          * server. There is a set order we must do this, because for example
1922          * users require their servers to exist, and channels require their
1923          * users to exist. You get the idea.
1924          */
1925         void DoBurst(TreeServer* s)
1926         {
1927                 std::string burst = "BURST "+ConvToStr(time(NULL));
1928                 std::string endburst = "ENDBURST";
1929                 // Because by the end of the netburst, it  could be gone!
1930                 std::string name = s->GetName();
1931                 this->Instance->WriteOpers("*** Bursting to \2"+name+"\2.");
1932                 this->WriteLine(burst);
1933                 /* send our version string */
1934                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
1935                 /* Send server tree */
1936                 this->SendServers(TreeRoot,s,1);
1937                 /* Send users and their oper status */
1938                 this->SendUsers(s);
1939                 /* Send everything else (channel modes, xlines etc) */
1940                 this->SendChannelModes(s);
1941                 this->SendXLines(s);
1942                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1943                 this->WriteLine(endburst);
1944                 this->Instance->WriteOpers("*** Finished bursting to \2"+name+"\2.");
1945         }
1946
1947         /* This function is called when we receive data from a remote
1948          * server. We buffer the data in a std::string (it doesnt stay
1949          * there for long), reading using InspSocket::Read() which can
1950          * read up to 16 kilobytes in one operation.
1951          *
1952          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1953          * THE SOCKET OBJECT FOR US.
1954          */
1955         virtual bool OnDataReady()
1956         {
1957                 char* data = this->Read();
1958                 /* Check that the data read is a valid pointer and it has some content */
1959                 if (data && *data)
1960                 {
1961                         this->in_buffer.append(data);
1962                         /* While there is at least one new line in the buffer,
1963                          * do something useful (we hope!) with it.
1964                          */
1965                         while (in_buffer.find("\n") != std::string::npos)
1966                         {
1967                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1968                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1969                                 if (ret.find("\r") != std::string::npos)
1970                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1971                                 /* Process this one, abort if it
1972                                  * didnt return true.
1973                                  */
1974                                 if (this->ctx_in)
1975                                 {
1976                                         char out[1024];
1977                                         char result[1024];
1978                                         memset(result,0,1024);
1979                                         memset(out,0,1024);
1980                                         ServerInstance->Log(DEBUG,"Original string '%s'",ret.c_str());
1981                                         /* ERROR + CAPAB is still allowed unencryped */
1982                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1983                                         {
1984                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1985                                                 if ((nbytes > 0) && (nbytes < 1024))
1986                                                 {
1987                                                         ServerInstance->Log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1988                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1989                                                         for (int t = 0; t < nbytes; t++)
1990                                                                 if (result[t] == '\7') result[t] = 0;
1991                                                         ret = result;
1992                                                 }
1993                                         }
1994                                 }
1995                                 if (!this->ProcessLine(ret))
1996                                 {
1997                                         ServerInstance->Log(DEBUG,"ProcessLine says no!");
1998                                         return false;
1999                                 }
2000                         }
2001                         return true;
2002                 }
2003                 /* EAGAIN returns an empty but non-NULL string, so this
2004                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2005                  */
2006                 return (data && !*data);
2007         }
2008
2009         int WriteLine(std::string line)
2010         {
2011                 ServerInstance->Log(DEBUG,"OUT: %s",line.c_str());
2012                 if (this->ctx_out)
2013                 {
2014                         char result[10240];
2015                         char result64[10240];
2016                         if (this->keylength)
2017                         {
2018                                 // pad it to the key length
2019                                 int n = this->keylength - (line.length() % this->keylength);
2020                                 if (n)
2021                                 {
2022                                         ServerInstance->Log(DEBUG,"Append %d chars to line to make it %d long from %d, key length %d",n,n+line.length(),line.length(),this->keylength);
2023                                         line.append(n,'\7');
2024                                 }
2025                         }
2026                         unsigned int ll = line.length();
2027                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2028                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2029                         line = result64;
2030                         //int from64tobits(char *out, const char *in, int maxlen);
2031                 }
2032                 return this->Write(line + "\r\n");
2033         }
2034
2035         /* Handle ERROR command */
2036         bool Error(std::deque<std::string> &params)
2037         {
2038                 if (params.size() < 1)
2039                         return false;
2040                 this->Instance->WriteOpers("*** ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2041                 /* we will return false to cause the socket to close. */
2042                 return false;
2043         }
2044
2045         /* remote MOTD. leet, huh? */
2046         bool Motd(std::string prefix, std::deque<std::string> &params)
2047         {
2048                 if (params.size() > 0)
2049                 {
2050                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2051                         {
2052                                 /* It's for our server */
2053                                 string_list results;
2054                                 userrec* source = this->Instance->FindNick(prefix);
2055
2056                                 if (source)
2057                                 {
2058                                         std::deque<std::string> par;
2059                                         par.push_back(prefix);
2060                                         par.push_back("");
2061
2062                                         if (!ServerInstance->Config->MOTD.size())
2063                                         {
2064                                                 par[1] = std::string("::")+ServerInstance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2065                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2066                                                 return true;
2067                                         }
2068
2069                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 375 "+source->nick+" :"+ServerInstance->Config->ServerName+" message of the day";
2070                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2071
2072                                         for (unsigned int i = 0; i < ServerInstance->Config->MOTD.size(); i++)
2073                                         {
2074                                                 par[1] = std::string("::")+ServerInstance->Config->ServerName+" 372 "+source->nick+" :- "+ServerInstance->Config->MOTD[i];
2075                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2076                                         }
2077
2078                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2079                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2080                                 }
2081                         }
2082                         else
2083                         {
2084                                 /* Pass it on */
2085                                 userrec* source = this->Instance->FindNick(prefix);
2086                                 if (source)
2087                                         DoOneToOne(prefix, "MOTD", params, params[0]);
2088                         }
2089                 }
2090                 return true;
2091         }
2092
2093         /* remote ADMIN. leet, huh? */
2094         bool Admin(std::string prefix, std::deque<std::string> &params)
2095         {
2096                 if (params.size() > 0)
2097                 {
2098                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2099                         {
2100                                 /* It's for our server */
2101                                 string_list results;
2102                                 userrec* source = this->Instance->FindNick(prefix);
2103
2104                                 if (source)
2105                                 {
2106                                         std::deque<std::string> par;
2107                                         par.push_back(prefix);
2108                                         par.push_back("");
2109
2110                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+ServerInstance->Config->ServerName;
2111                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2112
2113                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 257 "+source->nick+" :Name     - "+ServerInstance->Config->AdminName;
2114                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2115
2116                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+ServerInstance->Config->AdminNick;
2117                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2118
2119                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+ServerInstance->Config->AdminEmail;
2120                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2121                                 }
2122                         }
2123                         else
2124                         {
2125                                 /* Pass it on */
2126                                 userrec* source = this->Instance->FindNick(prefix);
2127                                 if (source)
2128                                         DoOneToOne(prefix, "ADMIN", params, params[0]);
2129                         }
2130                 }
2131                 return true;
2132         }
2133
2134         bool Stats(std::string prefix, std::deque<std::string> &params)
2135         {
2136                 /* Get the reply to a STATS query if it matches this servername,
2137                  * and send it back as a load of PUSH queries
2138                  */
2139                 if (params.size() > 1)
2140                 {
2141                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2142                         {
2143                                 /* It's for our server */
2144                                 string_list results;
2145                                 userrec* source = this->Instance->FindNick(prefix);
2146                                 if (source)
2147                                 {
2148                                         std::deque<std::string> par;
2149                                         par.push_back(prefix);
2150                                         par.push_back("");
2151                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2152                                         for (size_t i = 0; i < results.size(); i++)
2153                                         {
2154                                                 par[1] = "::" + results[i];
2155                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2156                                         }
2157                                 }
2158                         }
2159                         else
2160                         {
2161                                 /* Pass it on */
2162                                 userrec* source = this->Instance->FindNick(prefix);
2163                                 if (source)
2164                                         DoOneToOne(prefix, "STATS", params, params[1]);
2165                         }
2166                 }
2167                 return true;
2168         }
2169
2170
2171         /* Because the core won't let users or even SERVERS set +o,
2172          * we use the OPERTYPE command to do this.
2173          */
2174         bool OperType(std::string prefix, std::deque<std::string> &params)
2175         {
2176                 if (params.size() != 1)
2177                 {
2178                         ServerInstance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2179                         return true;
2180                 }
2181                 std::string opertype = params[0];
2182                 userrec* u = this->Instance->FindNick(prefix);
2183                 if (u)
2184                 {
2185                         u->modes[UM_OPERATOR] = 1;
2186                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2187                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2188                 }
2189                 return true;
2190         }
2191
2192         /* Because Andy insists that services-compatible servers must
2193          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2194          */
2195         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2196         {
2197                 if (params.size() < 3)
2198                         return true;
2199
2200                 userrec* u = this->Instance->FindNick(params[0]);
2201
2202                 if (u)
2203                 {
2204                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2205                         if (IS_LOCAL(u))
2206                         {
2207                                 std::deque<std::string> par;
2208                                 par.push_back(params[1]);
2209                                 /* This is not required as one is sent in OnUserPostNick below
2210                                  */
2211                                 //DoOneToMany(u->nick,"NICK",par);
2212                                 if (!u->ForceNickChange(params[1].c_str()))
2213                                 {
2214                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2215                                         return true;
2216                                 }
2217                                 u->age = atoi(params[2].c_str());
2218                         }
2219                 }
2220                 return true;
2221         }
2222
2223         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2224         {
2225                 if (params.size() < 2)
2226                         return true;
2227
2228                 userrec* u = this->Instance->FindNick(params[0]);
2229
2230                 if (u)
2231                 {
2232                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2233                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2234                 }
2235                 return true;
2236         }
2237
2238         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2239         {
2240                 if (params.size() < 1)
2241                         return false;
2242
2243                 std::string servermask = params[0];
2244
2245                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2246                 {
2247                         this->Instance->WriteOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
2248                         this->Instance->RehashServer();
2249                         ReadConfiguration(false);
2250                 }
2251                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2252                 return true;
2253         }
2254
2255         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2256         {
2257                 if (params.size() != 2)
2258                         return true;
2259
2260                 std::string nick = params[0];
2261                 userrec* u = this->Instance->FindNick(prefix);
2262                 userrec* who = this->Instance->FindNick(nick);
2263
2264                 if (who)
2265                 {
2266                         /* Prepend kill source, if we don't have one */
2267                         std::string sourceserv = prefix;
2268                         if (u)
2269                         {
2270                                 sourceserv = u->server;
2271                         }
2272                         if (*(params[1].c_str()) != '[')
2273                         {
2274                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2275                         }
2276                         std::string reason = params[1];
2277                         params[1] = ":" + params[1];
2278                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2279                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2280                         userrec::QuitUser(this->Instance,who,reason);
2281                 }
2282                 return true;
2283         }
2284
2285         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2286         {
2287                 if (params.size() < 1)
2288                         return true;
2289
2290                 if (params.size() == 1)
2291                 {
2292                         TreeServer* ServerSource = FindServer(prefix);
2293                         if (ServerSource)
2294                         {
2295                                 ServerSource->SetPingFlag();
2296                         }
2297                 }
2298                 else
2299                 {
2300                         std::string forwardto = params[1];
2301                         if (forwardto == this->Instance->Config->ServerName)
2302                         {
2303                                 /*
2304                                  * this is a PONG for us
2305                                  * if the prefix is a user, check theyre local, and if they are,
2306                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2307                                  * Services might want to send these s->s, but we dont need to yet.
2308                                  */
2309                                 userrec* u = this->Instance->FindNick(prefix);
2310
2311                                 if (u)
2312                                 {
2313                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2314                                 }
2315                         }
2316                         else
2317                         {
2318                                 // not for us, pass it on :)
2319                                 DoOneToOne(prefix,"PONG",params,forwardto);
2320                         }
2321                 }
2322
2323                 return true;
2324         }
2325
2326         bool MetaData(std::string prefix, std::deque<std::string> &params)
2327         {
2328                 if (params.size() < 3)
2329                         return true;
2330
2331                 TreeServer* ServerSource = FindServer(prefix);
2332
2333                 if (ServerSource)
2334                 {
2335                         if (params[0] == "*")
2336                         {
2337                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2338                         }
2339                         else if (*(params[0].c_str()) == '#')
2340                         {
2341                                 chanrec* c = this->Instance->FindChan(params[0]);
2342                                 if (c)
2343                                 {
2344                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2345                                 }
2346                         }
2347                         else if (*(params[0].c_str()) != '#')
2348                         {
2349                                 userrec* u = this->Instance->FindNick(params[0]);
2350                                 if (u)
2351                                 {
2352                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2353                                 }
2354                         }
2355                 }
2356
2357                 params[2] = ":" + params[2];
2358                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2359                 return true;
2360         }
2361
2362         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2363         {
2364                 if (params.size() < 1)
2365                         return true;
2366
2367                 TreeServer* ServerSource = FindServer(prefix);
2368
2369                 if (ServerSource)
2370                 {
2371                         ServerSource->SetVersion(params[0]);
2372                 }
2373                 params[0] = ":" + params[0];
2374                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2375                 return true;
2376         }
2377
2378         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2379         {
2380                 if (params.size() < 1)
2381                         return true;
2382
2383                 userrec* u = this->Instance->FindNick(prefix);
2384
2385                 if (u)
2386                 {
2387                         u->ChangeDisplayedHost(params[0].c_str());
2388                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2389                 }
2390                 return true;
2391         }
2392
2393         bool AddLine(std::string prefix, std::deque<std::string> &params)
2394         {
2395                 if (params.size() < 6)
2396                         return true;
2397
2398                 bool propogate = false;
2399
2400                 switch (*(params[0].c_str()))
2401                 {
2402                         case 'Z':
2403                                 propogate = ServerInstance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2404                                 ServerInstance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2405                         break;
2406                         case 'Q':
2407                                 propogate = ServerInstance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2408                                 ServerInstance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2409                         break;
2410                         case 'E':
2411                                 propogate = ServerInstance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2412                                 ServerInstance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2413                         break;
2414                         case 'G':
2415                                 propogate = ServerInstance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2416                                 ServerInstance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2417                         break;
2418                         case 'K':
2419                                 propogate = ServerInstance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2420                         break;
2421                         default:
2422                                 /* Just in case... */
2423                                 this->Instance->WriteOpers("*** \2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2424                                 propogate = false;
2425                         break;
2426                 }
2427
2428                 /* Send it on its way */
2429                 if (propogate)
2430                 {
2431                         if (atoi(params[4].c_str()))
2432                         {
2433                                 this->Instance->WriteOpers("*** %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());
2434                         }
2435                         else
2436                         {
2437                                 this->Instance->WriteOpers("*** %s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
2438                         }
2439                         params[5] = ":" + params[5];
2440                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2441                 }
2442                 if (!this->bursting)
2443                 {
2444                         ServerInstance->Log(DEBUG,"Applying lines...");
2445                         ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2446                 }
2447                 return true;
2448         }
2449
2450         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2451         {
2452                 if (params.size() < 1)
2453                         return true;
2454
2455                 userrec* u = this->Instance->FindNick(prefix);
2456
2457                 if (u)
2458                 {
2459                         u->ChangeName(params[0].c_str());
2460                         params[0] = ":" + params[0];
2461                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2462                 }
2463                 return true;
2464         }
2465
2466         bool Whois(std::string prefix, std::deque<std::string> &params)
2467         {
2468                 if (params.size() < 1)
2469                         return true;
2470
2471                 ServerInstance->Log(DEBUG,"In IDLE command");
2472                 userrec* u = this->Instance->FindNick(prefix);
2473
2474                 if (u)
2475                 {
2476                         ServerInstance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2477                         // an incoming request
2478                         if (params.size() == 1)
2479                         {
2480                                 userrec* x = this->Instance->FindNick(params[0]);
2481                                 if ((x) && (IS_LOCAL(x)))
2482                                 {
2483                                         userrec* x = this->Instance->FindNick(params[0]);
2484                                         ServerInstance->Log(DEBUG,"Got IDLE");
2485                                         char signon[MAXBUF];
2486                                         char idle[MAXBUF];
2487                                         ServerInstance->Log(DEBUG,"Sending back IDLE 3");
2488                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2489                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2490                                         std::deque<std::string> par;
2491                                         par.push_back(prefix);
2492                                         par.push_back(signon);
2493                                         par.push_back(idle);
2494                                         // ours, we're done, pass it BACK
2495                                         DoOneToOne(params[0],"IDLE",par,u->server);
2496                                 }
2497                                 else
2498                                 {
2499                                         // not ours pass it on
2500                                         DoOneToOne(prefix,"IDLE",params,x->server);
2501                                 }
2502                         }
2503                         else if (params.size() == 3)
2504                         {
2505                                 std::string who_did_the_whois = params[0];
2506                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2507                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2508                                 {
2509                                         ServerInstance->Log(DEBUG,"Got final IDLE");
2510                                         // an incoming reply to a whois we sent out
2511                                         std::string nick_whoised = prefix;
2512                                         unsigned long signon = atoi(params[1].c_str());
2513                                         unsigned long idle = atoi(params[2].c_str());
2514                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2515                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2516                                 }
2517                                 else
2518                                 {
2519                                         // not ours, pass it on
2520                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2521                                 }
2522                         }
2523                 }
2524                 return true;
2525         }
2526
2527         bool Push(std::string prefix, std::deque<std::string> &params)
2528         {
2529                 if (params.size() < 2)
2530                         return true;
2531
2532                 userrec* u = this->Instance->FindNick(params[0]);
2533
2534                 if (!u)
2535                         return true;
2536
2537                 if (IS_LOCAL(u))
2538                 {
2539                         u->Write(params[1]);
2540                 }
2541                 else
2542                 {
2543                         // continue the raw onwards
2544                         params[1] = ":" + params[1];
2545                         DoOneToOne(prefix,"PUSH",params,u->server);
2546                 }
2547                 return true;
2548         }
2549
2550         bool Time(std::string prefix, std::deque<std::string> &params)
2551         {
2552                 // :source.server TIME remote.server sendernick
2553                 // :remote.server TIME source.server sendernick TS
2554                 if (params.size() == 2)
2555                 {
2556                         // someone querying our time?
2557                         if (this->Instance->Config->ServerName == params[0])
2558                         {
2559                                 userrec* u = this->Instance->FindNick(params[1]);
2560                                 if (u)
2561                                 {
2562                                         char curtime[256];
2563                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2564                                         params.push_back(curtime);
2565                                         params[0] = prefix;
2566                                         DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2567                                 }
2568                         }
2569                         else
2570                         {
2571                                 // not us, pass it on
2572                                 userrec* u = this->Instance->FindNick(params[1]);
2573                                 if (u)
2574                                         DoOneToOne(prefix,"TIME",params,params[0]);
2575                         }
2576                 }
2577                 else if (params.size() == 3)
2578                 {
2579                         // a response to a previous TIME
2580                         userrec* u = this->Instance->FindNick(params[1]);
2581                         if ((u) && (IS_LOCAL(u)))
2582                         {
2583                         time_t rawtime = atol(params[2].c_str());
2584                         struct tm * timeinfo;
2585                         timeinfo = localtime(&rawtime);
2586                                 char tms[26];
2587                                 snprintf(tms,26,"%s",asctime(timeinfo));
2588                                 tms[24] = 0;
2589                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2590                         }
2591                         else
2592                         {
2593                                 if (u)
2594                                         DoOneToOne(prefix,"TIME",params,u->server);
2595                         }
2596                 }
2597                 return true;
2598         }
2599
2600         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2601         {
2602                 if (params.size() < 1)
2603                         return true;
2604
2605                 if (params.size() == 1)
2606                 {
2607                         std::string stufftobounce = params[0];
2608                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2609                         return true;
2610                 }
2611                 else
2612                 {
2613                         std::string forwardto = params[1];
2614                         if (forwardto == this->Instance->Config->ServerName)
2615                         {
2616                                 // this is a ping for us, send back PONG to the requesting server
2617                                 params[1] = params[0];
2618                                 params[0] = forwardto;
2619                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2620                         }
2621                         else
2622                         {
2623                                 // not for us, pass it on :)
2624                                 DoOneToOne(prefix,"PING",params,forwardto);
2625                         }
2626                         return true;
2627                 }
2628         }
2629
2630         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2631         {
2632                 if (params.size() < 4)
2633                         return false;
2634
2635                 std::string servername = params[0];
2636                 std::string password = params[1];
2637                 // hopcount is not used for a remote server, we calculate this ourselves
2638                 std::string description = params[3];
2639                 TreeServer* ParentOfThis = FindServer(prefix);
2640
2641                 if (!ParentOfThis)
2642                 {
2643                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2644                         return false;
2645                 }
2646                 TreeServer* CheckDupe = FindServer(servername);
2647                 if (CheckDupe)
2648                 {
2649                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2650                         this->Instance->WriteOpers("*** Server connection from \2"+servername+"\2 denied, already exists");
2651                         return false;
2652                 }
2653                 TreeServer* Node = new TreeServer(this->Instance,servername,description,ParentOfThis,NULL);
2654                 ParentOfThis->AddChild(Node);
2655                 params[3] = ":" + params[3];
2656                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2657                 this->Instance->WriteOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2658                 return true;
2659         }
2660
2661         bool Outbound_Reply_Server(std::deque<std::string> &params)
2662         {
2663                 if (params.size() < 4)
2664                         return false;
2665
2666                 irc::string servername = params[0].c_str();
2667                 std::string sname = params[0];
2668                 std::string password = params[1];
2669                 int hops = atoi(params[2].c_str());
2670
2671                 if (hops)
2672                 {
2673                         this->WriteLine("ERROR :Server too far away for authentication");
2674                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2675                         return false;
2676                 }
2677                 std::string description = params[3];
2678                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2679                 {
2680                         if ((x->Name == servername) && (x->RecvPass == password))
2681                         {
2682                                 TreeServer* CheckDupe = FindServer(sname);
2683                                 if (CheckDupe)
2684                                 {
2685                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2686                                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2687                                         return false;
2688                                 }
2689                                 // Begin the sync here. this kickstarts the
2690                                 // other side, waiting in WAIT_AUTH_2 state,
2691                                 // into starting their burst, as it shows
2692                                 // that we're happy.
2693                                 this->LinkState = CONNECTED;
2694                                 // we should add the details of this server now
2695                                 // to the servers tree, as a child of the root
2696                                 // node.
2697                                 TreeServer* Node = new TreeServer(this->Instance,sname,description,TreeRoot,this);
2698                                 TreeRoot->AddChild(Node);
2699                                 params[3] = ":" + params[3];
2700                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2701                                 this->bursting = true;
2702                                 this->DoBurst(Node);
2703                                 return true;
2704                         }
2705                 }
2706                 this->WriteLine("ERROR :Invalid credentials");
2707                 this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2708                 return false;
2709         }
2710
2711         bool Inbound_Server(std::deque<std::string> &params)
2712         {
2713                 if (params.size() < 4)
2714                         return false;
2715
2716                 irc::string servername = params[0].c_str();
2717                 std::string sname = params[0];
2718                 std::string password = params[1];
2719                 int hops = atoi(params[2].c_str());
2720
2721                 if (hops)
2722                 {
2723                         this->WriteLine("ERROR :Server too far away for authentication");
2724                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2725                         return false;
2726                 }
2727                 std::string description = params[3];
2728                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2729                 {
2730                         if ((x->Name == servername) && (x->RecvPass == password))
2731                         {
2732                                 TreeServer* CheckDupe = FindServer(sname);
2733                                 if (CheckDupe)
2734                                 {
2735                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2736                                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2737                                         return false;
2738                                 }
2739                                 /* If the config says this link is encrypted, but the remote side
2740                                  * hasnt bothered to send the AES command before SERVER, then we
2741                                  * boot them off as we MUST have this connection encrypted.
2742                                  */
2743                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2744                                 {
2745                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2746                                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2747                                         return false;
2748                                 }
2749                                 this->Instance->WriteOpers("*** Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2750                                 this->InboundServerName = sname;
2751                                 this->InboundDescription = description;
2752                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2753                                 // along with the sendpass from this block.
2754                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2755                                 // move to the next state, we are now waiting for THEM.
2756                                 this->LinkState = WAIT_AUTH_2;
2757                                 return true;
2758                         }
2759                 }
2760                 this->WriteLine("ERROR :Invalid credentials");
2761                 this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2762                 return false;
2763         }
2764
2765         void Split(std::string line, std::deque<std::string> &n)
2766         {
2767                 n.clear();
2768                 irc::tokenstream tokens(line);
2769                 std::string param;
2770                 while ((param = tokens.GetToken()) != "")
2771                         n.push_back(param);
2772                 return;
2773         }
2774
2775         bool ProcessLine(std::string line)
2776         {
2777                 std::deque<std::string> params;
2778                 irc::string command;
2779                 std::string prefix;
2780
2781                 if (line.empty())
2782                         return true;
2783
2784                 line = line.substr(0, line.find_first_of("\r\n"));
2785
2786                 ServerInstance->Log(DEBUG,"IN: %s", line.c_str());
2787
2788                 this->Split(line.c_str(),params);
2789
2790                 if ((params[0][0] == ':') && (params.size() > 1))
2791                 {
2792                         prefix = params[0].substr(1);
2793                         params.pop_front();
2794                 }
2795
2796                 command = params[0].c_str();
2797                 params.pop_front();
2798
2799                 if ((!this->ctx_in) && (command == "AES"))
2800                 {
2801                         std::string sserv = params[0];
2802                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2803                         {
2804                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2805                                 {
2806                                         this->InitAES(x->EncryptionKey,sserv);
2807                                 }
2808                         }
2809
2810                         return true;
2811                 }
2812                 else if ((this->ctx_in) && (command == "AES"))
2813                 {
2814                         this->Instance->WriteOpers("*** \2AES\2: Encryption already enabled on this connection yet %s is trying to enable it twice!",params[0].c_str());
2815                 }
2816
2817                 switch (this->LinkState)
2818                 {
2819                         TreeServer* Node;
2820
2821                         case WAIT_AUTH_1:
2822                                 // Waiting for SERVER command from remote server. Server initiating
2823                                 // the connection sends the first SERVER command, listening server
2824                                 // replies with theirs if its happy, then if the initiator is happy,
2825                                 // it starts to send its net sync, which starts the merge, otherwise
2826                                 // it sends an ERROR.
2827                                 if (command == "PASS")
2828                                 {
2829                                         /* Silently ignored */
2830                                 }
2831                                 else if (command == "SERVER")
2832                                 {
2833                                         return this->Inbound_Server(params);
2834                                 }
2835                                 else if (command == "ERROR")
2836                                 {
2837                                         return this->Error(params);
2838                                 }
2839                                 else if (command == "USER")
2840                                 {
2841                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2842                                         return false;
2843                                 }
2844                                 else if (command == "CAPAB")
2845                                 {
2846                                         return this->Capab(params);
2847                                 }
2848                                 else if ((command == "U") || (command == "S"))
2849                                 {
2850                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2851                                         return false;
2852                                 }
2853                                 else
2854                                 {
2855                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2856                                         return false;
2857                                 }
2858                         break;
2859                         case WAIT_AUTH_2:
2860                                 // Waiting for start of other side's netmerge to say they liked our
2861                                 // password.
2862                                 if (command == "SERVER")
2863                                 {
2864                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2865                                         // silently ignore.
2866                                         return true;
2867                                 }
2868                                 else if ((command == "U") || (command == "S"))
2869                                 {
2870                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2871                                         return false;
2872                                 }
2873                                 else if (command == "BURST")
2874                                 {
2875                                         if (params.size())
2876                                         {
2877                                                 /* If a time stamp is provided, try and check syncronization */
2878                                                 time_t THEM = atoi(params[0].c_str());
2879                                                 long delta = THEM-time(NULL);
2880                                                 if ((delta < -600) || (delta > 600))
2881                                                 {
2882                                                         this->Instance->WriteOpers("*** \2ERROR\2: Your clocks are out by %d seconds (this is more than ten minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs(delta));
2883                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2884                                                         return false;
2885                                                 }
2886                                                 else if ((delta < -60) || (delta > 60))
2887                                                 {
2888                                                         this->Instance->WriteOpers("*** \2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2889                                                 }
2890                                         }
2891                                         this->LinkState = CONNECTED;
2892                                         Node = new TreeServer(this->Instance,InboundServerName,InboundDescription,TreeRoot,this);
2893                                         TreeRoot->AddChild(Node);
2894                                         params.clear();
2895                                         params.push_back(InboundServerName);
2896                                         params.push_back("*");
2897                                         params.push_back("1");
2898                                         params.push_back(":"+InboundDescription);
2899                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2900                                         this->bursting = true;
2901                                         this->DoBurst(Node);
2902                                 }
2903                                 else if (command == "ERROR")
2904                                 {
2905                                         return this->Error(params);
2906                                 }
2907                                 else if (command == "CAPAB")
2908                                 {
2909                                         return this->Capab(params);
2910                                 }
2911
2912                         break;
2913                         case LISTENER:
2914                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2915                                 return false;
2916                         break;
2917                         case CONNECTING:
2918                                 if (command == "SERVER")
2919                                 {
2920                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2921                                         // has just sent us their credentials. If we get this far, theyre
2922                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2923                                         // if we're happy with this, we should send our netburst which
2924                                         // kickstarts the merge.
2925                                         return this->Outbound_Reply_Server(params);
2926                                 }
2927                                 else if (command == "ERROR")
2928                                 {
2929                                         return this->Error(params);
2930                                 }
2931                         break;
2932                         case CONNECTED:
2933                                 // This is the 'authenticated' state, when all passwords
2934                                 // have been exchanged and anything past this point is taken
2935                                 // as gospel.
2936
2937                                 if (prefix != "")
2938                                 {
2939                                         std::string direction = prefix;
2940                                         userrec* t = this->Instance->FindNick(prefix);
2941                                         if (t)
2942                                         {
2943                                                 direction = t->server;
2944                                         }
2945                                         TreeServer* route_back_again = BestRouteTo(direction);
2946                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2947                                         {
2948                                                 if (route_back_again)
2949                                                         ServerInstance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2950                                                 return true;
2951                                         }
2952
2953                                         /* Fix by brain:
2954                                          * When there is activity on the socket, reset the ping counter so
2955                                          * that we're not wasting bandwidth pinging an active server.
2956                                          */
2957                                         route_back_again->SetNextPingTime(time(NULL) + 60);
2958                                         route_back_again->SetPingFlag();
2959                                 }
2960
2961                                 if (command == "SVSMODE")
2962                                 {
2963                                         /* Services expects us to implement
2964                                          * SVSMODE. In inspircd its the same as
2965                                          * MODE anyway.
2966                                          */
2967                                         command = "MODE";
2968                                 }
2969                                 std::string target = "";
2970                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
2971                                  * working with std::string here.
2972                                  */
2973                                 if ((command == "NICK") && (params.size() > 1))
2974                                 {
2975                                         return this->IntroduceClient(prefix,params);
2976                                 }
2977                                 else if (command == "FJOIN")
2978                                 {
2979                                         return this->ForceJoin(prefix,params);
2980                                 }
2981                                 else if (command == "STATS")
2982                                 {
2983                                         return this->Stats(prefix, params);
2984                                 }
2985                                 else if (command == "MOTD")
2986                                 {
2987                                         return this->Motd(prefix, params);
2988                                 }
2989                                 else if (command == "ADMIN")
2990                                 {
2991                                         return this->Admin(prefix, params);
2992                                 }
2993                                 else if (command == "SERVER")
2994                                 {
2995                                         return this->RemoteServer(prefix,params);
2996                                 }
2997                                 else if (command == "ERROR")
2998                                 {
2999                                         return this->Error(params);
3000                                 }
3001                                 else if (command == "OPERTYPE")
3002                                 {
3003                                         return this->OperType(prefix,params);
3004                                 }
3005                                 else if (command == "FMODE")
3006                                 {
3007                                         return this->ForceMode(prefix,params);
3008                                 }
3009                                 else if (command == "KILL")
3010                                 {
3011                                         return this->RemoteKill(prefix,params);
3012                                 }
3013                                 else if (command == "FTOPIC")
3014                                 {
3015                                         return this->ForceTopic(prefix,params);
3016                                 }
3017                                 else if (command == "REHASH")
3018                                 {
3019                                         return this->RemoteRehash(prefix,params);
3020                                 }
3021                                 else if (command == "METADATA")
3022                                 {
3023                                         return this->MetaData(prefix,params);
3024                                 }
3025                                 else if (command == "PING")
3026                                 {
3027                                         /*
3028                                          * We just got a ping from a server that's bursting.
3029                                          * This can't be right, so set them to not bursting, and
3030                                          * apply their lines.
3031                                          */
3032                                         if (this->bursting)
3033                                         {
3034                                                 this->bursting = false;
3035                                                 ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3036                                         }
3037                                         if (prefix == "")
3038                                         {
3039                                                 prefix = this->GetName();
3040                                         }
3041                                         return this->LocalPing(prefix,params);
3042                                 }
3043                                 else if (command == "PONG")
3044                                 {
3045                                         /*
3046                                          * We just got a pong from a server that's bursting.
3047                                          * This can't be right, so set them to not bursting, and
3048                                          * apply their lines.
3049                                          */
3050                                         if (this->bursting)
3051                                         {
3052                                                 this->bursting = false;
3053                                                 ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3054                                         }
3055                                         if (prefix == "")
3056                                         {
3057                                                 prefix = this->GetName();
3058                                         }
3059                                         return this->LocalPong(prefix,params);
3060                                 }
3061                                 else if (command == "VERSION")
3062                                 {
3063                                         return this->ServerVersion(prefix,params);
3064                                 }
3065                                 else if (command == "FHOST")
3066                                 {
3067                                         return this->ChangeHost(prefix,params);
3068                                 }
3069                                 else if (command == "FNAME")
3070                                 {
3071                                         return this->ChangeName(prefix,params);
3072                                 }
3073                                 else if (command == "ADDLINE")
3074                                 {
3075                                         return this->AddLine(prefix,params);
3076                                 }
3077                                 else if (command == "SVSNICK")
3078                                 {
3079                                         if (prefix == "")
3080                                         {
3081                                                 prefix = this->GetName();
3082                                         }
3083                                         return this->ForceNick(prefix,params);
3084                                 }
3085                                 else if (command == "IDLE")
3086                                 {
3087                                         return this->Whois(prefix,params);
3088                                 }
3089                                 else if (command == "PUSH")
3090                                 {
3091                                         return this->Push(prefix,params);
3092                                 }
3093                                 else if (command == "TIME")
3094                                 {
3095                                         return this->Time(prefix,params);
3096                                 }
3097                                 else if ((command == "KICK") && (IsServer(prefix)))
3098                                 {
3099                                         std::string sourceserv = this->myhost;
3100                                         if (params.size() == 3)
3101                                         {
3102                                                 userrec* user = this->Instance->FindNick(params[1]);
3103                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3104                                                 if (user && chan)
3105                                                 {
3106                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3107                                                                 /* Yikes, the channels gone! */
3108                                                                 delete chan;
3109                                                 }
3110                                         }
3111                                         if (this->InboundServerName != "")
3112                                         {
3113                                                 sourceserv = this->InboundServerName;
3114                                         }
3115                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3116                                 }
3117                                 else if (command == "SVSJOIN")
3118                                 {
3119                                         if (prefix == "")
3120                                         {
3121                                                 prefix = this->GetName();
3122                                         }
3123                                         return this->ServiceJoin(prefix,params);
3124                                 }
3125                                 else if (command == "SQUIT")
3126                                 {
3127                                         if (params.size() == 2)
3128                                         {
3129                                                 this->Squit(FindServer(params[0]),params[1]);
3130                                         }
3131                                         return true;
3132                                 }
3133                                 else if (command == "ENDBURST")
3134                                 {
3135                                         this->bursting = false;
3136                                         ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3137                                         std::string sourceserv = this->myhost;
3138                                         if (this->InboundServerName != "")
3139                                         {
3140                                                 sourceserv = this->InboundServerName;
3141                                         }
3142                                         this->Instance->WriteOpers("*** Received end of netburst from \2%s\2",sourceserv.c_str());
3143                                         return true;
3144                                 }
3145                                 else
3146                                 {
3147                                         // not a special inter-server command.
3148                                         // Emulate the actual user doing the command,
3149                                         // this saves us having a huge ugly parser.
3150                                         userrec* who = this->Instance->FindNick(prefix);
3151                                         std::string sourceserv = this->myhost;
3152                                         if (this->InboundServerName != "")
3153                                         {
3154                                                 sourceserv = this->InboundServerName;
3155                                         }
3156                                         if (who)
3157                                         {
3158                                                 if ((command == "NICK") && (params.size() > 0))
3159                                                 {
3160                                                         /* On nick messages, check that the nick doesnt
3161                                                          * already exist here. If it does, kill their copy,
3162                                                          * and our copy.
3163                                                          */
3164                                                         userrec* x = this->Instance->FindNick(params[0]);
3165                                                         if ((x) && (x != who))
3166                                                         {
3167                                                                 std::deque<std::string> p;
3168                                                                 p.push_back(params[0]);
3169                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3170                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3171                                                                 p.clear();
3172                                                                 p.push_back(prefix);
3173                                                                 p.push_back("Nickname collision");
3174                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3175                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3176                                                                 userrec* y = this->Instance->FindNick(prefix);
3177                                                                 if (y)
3178                                                                 {
3179                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3180                                                                 }
3181                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3182                                                         }
3183                                                 }
3184                                                 // its a user
3185                                                 target = who->server;
3186                                                 const char* strparams[127];
3187                                                 for (unsigned int q = 0; q < params.size(); q++)
3188                                                 {
3189                                                         strparams[q] = params[q].c_str();
3190                                                 }
3191                                                 if (!this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3192                                                 {
3193                                                         this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3194                                                         return false;
3195                                                 }
3196                                         }
3197                                         else
3198                                         {
3199                                                 // its not a user. Its either a server, or somethings screwed up.
3200                                                 if (IsServer(prefix))
3201                                                 {
3202                                                         target = this->Instance->Config->ServerName;
3203                                                 }
3204                                                 else
3205                                                 {
3206                                                         ServerInstance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3207                                                         return true;
3208                                                 }
3209                                         }
3210                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3211
3212                                 }
3213                                 return true;
3214                         break;
3215                 }
3216                 return true;
3217         }
3218
3219         virtual std::string GetName()
3220         {
3221                 std::string sourceserv = this->myhost;
3222                 if (this->InboundServerName != "")
3223                 {
3224                         sourceserv = this->InboundServerName;
3225                 }
3226                 return sourceserv;
3227         }
3228
3229         virtual void OnTimeout()
3230         {
3231                 if (this->LinkState == CONNECTING)
3232                 {
3233                         this->Instance->WriteOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
3234                 }
3235         }
3236
3237         virtual void OnClose()
3238         {
3239                 // Connection closed.
3240                 // If the connection is fully up (state CONNECTED)
3241                 // then propogate a netsplit to all peers.
3242                 std::string quitserver = this->myhost;
3243                 if (this->InboundServerName != "")
3244                 {
3245                         quitserver = this->InboundServerName;
3246                 }
3247                 TreeServer* s = FindServer(quitserver);
3248                 if (s)
3249                 {
3250                         Squit(s,"Remote host closed the connection");
3251                 }
3252                 this->Instance->WriteOpers("Server '\2%s\2' closed the connection.",quitserver.c_str());
3253         }
3254
3255         virtual int OnIncomingConnection(int newsock, char* ip)
3256         {
3257                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3258                  * or discovering if this port is the server port, we don't allow connections from any
3259                  * IPs for which we don't have a link block.
3260                  */
3261                 bool found = false;
3262
3263                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3264                 if (!found)
3265                 {
3266                         for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
3267                                 if (MatchCIDR(ip, (*i).c_str()))
3268                                         found = true;
3269
3270                         if (!found)
3271                         {
3272                                 this->Instance->WriteOpers("Server connection from %s denied (no link blocks with that IP address)", ip);
3273                                 close(newsock);
3274                                 return false;
3275                         }
3276                 }
3277                 TreeSocket* s = new TreeSocket(this->Instance, newsock, ip);
3278                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3279                 return true;
3280         }
3281 };
3282
3283 /** This class is used to resolve server hostnames during /connect and autoconnect.
3284  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3285  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3286  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3287  * will have an IP address which we can then use to continue our connection.
3288  */
3289 class ServernameResolver : public Resolver
3290 {
3291  private:
3292         /** A copy of the Link tag info for what we're connecting to.
3293          * We take a copy, rather than using a pointer, just in case the
3294          * admin takes the tag away and rehashes while the domain is resolving.
3295          */
3296         Link MyLink;
3297  public:
3298         ServernameResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3299         {
3300                 /* Nothing in here, folks */
3301         }
3302
3303         void OnLookupComplete(const std::string &result)
3304         {
3305                 /* Initiate the connection, now that we have an IP to use.
3306                  * Passing a hostname directly to InspSocket causes it to
3307                  * just bail and set its FD to -1.
3308                  */
3309                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3310                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3311                 {
3312                         TreeSocket* newsocket = new TreeSocket(ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3313                         if (newsocket->GetFd() > -1)
3314                         {
3315                                 /* We're all OK */
3316                         }
3317                         else
3318                         {
3319                                 /* Something barfed, show the opers */
3320                                 ServerInstance->WriteOpers("*** CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3321                                 delete newsocket;
3322                         }
3323                 }
3324         }
3325
3326         void OnError(ResolverError e, const std::string &errormessage)
3327         {
3328                 /* Ooops! */
3329                 ServerInstance->WriteOpers("*** CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3330         }
3331 };
3332
3333 class SecurityIPResolver : public Resolver
3334 {
3335  private:
3336         Link MyLink;
3337  public:
3338         SecurityIPResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3339         {
3340         }
3341
3342         void OnLookupComplete(const std::string &result)
3343         {
3344                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3345                 ValidIPs.push_back(result);
3346         }
3347
3348         void OnError(ResolverError e, const std::string &errormessage)
3349         {
3350                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3351         }
3352 };
3353
3354 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3355 {
3356         for (unsigned int c = 0; c < list.size(); c++)
3357         {
3358                 if (list[c] == server)
3359                 {
3360                         return;
3361                 }
3362         }
3363         list.push_back(server);
3364 }
3365
3366 // returns a list of DIRECT servernames for a specific channel
3367 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3368 {
3369         CUList *ulist = c->GetUsers();
3370         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3371         {
3372                 if (i->second->GetFd() < 0)
3373                 {
3374                         TreeServer* best = BestRouteTo(i->second->server);
3375                         if (best)
3376                                 AddThisServer(best,list);
3377                 }
3378         }
3379         return;
3380 }
3381
3382 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3383 {
3384         TreeServer* omitroute = BestRouteTo(omit);
3385         if ((command == "NOTICE") || (command == "PRIVMSG"))
3386         {
3387                 if (params.size() >= 2)
3388                 {
3389                         /* Prefixes */
3390                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3391                         {
3392                                 params[0] = params[0].substr(1, params[0].length()-1);
3393                         }
3394                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3395                         {
3396                                 // special routing for private messages/notices
3397                                 userrec* d = ServerInstance->FindNick(params[0]);
3398                                 if (d)
3399                                 {
3400                                         std::deque<std::string> par;
3401                                         par.push_back(params[0]);
3402                                         par.push_back(":"+params[1]);
3403                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3404                                         return true;
3405                                 }
3406                         }
3407                         else if (*(params[0].c_str()) == '$')
3408                         {
3409                                 std::deque<std::string> par;
3410                                 par.push_back(params[0]);
3411                                 par.push_back(":"+params[1]);
3412                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3413                                 return true;
3414                         }
3415                         else
3416                         {
3417                                 ServerInstance->Log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3418                                 chanrec* c = ServerInstance->FindChan(params[0]);
3419                                 if (c)
3420                                 {
3421                                         std::deque<TreeServer*> list;
3422                                         GetListOfServersForChannel(c,list);
3423                                         ServerInstance->Log(DEBUG,"Got a list of %d servers",list.size());
3424                                         unsigned int lsize = list.size();
3425                                         for (unsigned int i = 0; i < lsize; i++)
3426                                         {
3427                                                 TreeSocket* Sock = list[i]->GetSocket();
3428                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3429                                                 {
3430                                                         ServerInstance->Log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3431                                                         Sock->WriteLine(data);
3432                                                 }
3433                                         }
3434                                         return true;
3435                                 }
3436                         }
3437                 }
3438         }
3439         unsigned int items = TreeRoot->ChildCount();
3440         for (unsigned int x = 0; x < items; x++)
3441         {
3442                 TreeServer* Route = TreeRoot->GetChild(x);
3443                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3444                 {
3445                         TreeSocket* Sock = Route->GetSocket();
3446                         if (Sock)
3447                                 Sock->WriteLine(data);
3448                 }
3449         }
3450         return true;
3451 }
3452
3453 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3454 {
3455         TreeServer* omitroute = BestRouteTo(omit);
3456         std::string FullLine = ":" + prefix + " " + command;
3457         unsigned int words = params.size();
3458         for (unsigned int x = 0; x < words; x++)
3459         {
3460                 FullLine = FullLine + " " + params[x];
3461         }
3462         unsigned int items = TreeRoot->ChildCount();
3463         for (unsigned int x = 0; x < items; x++)
3464         {
3465                 TreeServer* Route = TreeRoot->GetChild(x);
3466                 // Send the line IF:
3467                 // The route has a socket (its a direct connection)
3468                 // The route isnt the one to be omitted
3469                 // The route isnt the path to the one to be omitted
3470                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3471                 {
3472                         TreeSocket* Sock = Route->GetSocket();
3473                         if (Sock)
3474                                 Sock->WriteLine(FullLine);
3475                 }
3476         }
3477         return true;
3478 }
3479
3480 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3481 {
3482         std::string FullLine = ":" + prefix + " " + command;
3483         unsigned int words = params.size();
3484         for (unsigned int x = 0; x < words; x++)
3485         {
3486                 FullLine = FullLine + " " + params[x];
3487         }
3488         unsigned int items = TreeRoot->ChildCount();
3489         for (unsigned int x = 0; x < items; x++)
3490         {
3491                 TreeServer* Route = TreeRoot->GetChild(x);
3492                 if (Route && Route->GetSocket())
3493                 {
3494                         TreeSocket* Sock = Route->GetSocket();
3495                         if (Sock)
3496                                 Sock->WriteLine(FullLine);
3497                 }
3498         }
3499         return true;
3500 }
3501
3502 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3503 {
3504         std::string spfx = prefix;
3505         std::string scmd = command;
3506         return DoOneToMany(spfx, scmd, params);
3507 }
3508
3509 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3510 {
3511         std::string spfx = prefix;
3512         std::string scmd = command;
3513         return DoOneToAllButSender(spfx, scmd, params, omit);
3514 }
3515
3516 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3517 {
3518         TreeServer* Route = BestRouteTo(target);
3519         if (Route)
3520         {
3521                 std::string FullLine = ":" + prefix + " " + command;
3522                 unsigned int words = params.size();
3523                 for (unsigned int x = 0; x < words; x++)
3524                 {
3525                         FullLine = FullLine + " " + params[x];
3526                 }
3527                 if (Route && Route->GetSocket())
3528                 {
3529                         TreeSocket* Sock = Route->GetSocket();
3530                         if (Sock)
3531                                 Sock->WriteLine(FullLine);
3532                 }
3533                 return true;
3534         }
3535         else
3536         {
3537                 return false;
3538         }
3539 }
3540
3541 std::vector<TreeSocket*> Bindings;
3542
3543 void ReadConfiguration(bool rebind)
3544 {
3545         Conf = new ConfigReader(ServerInstance);
3546         if (rebind)
3547         {
3548                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3549                 {
3550                         std::string Type = Conf->ReadValue("bind","type",j);
3551                         std::string IP = Conf->ReadValue("bind","address",j);
3552                         long Port = Conf->ReadInteger("bind","port",j,true);
3553                         if (Type == "servers")
3554                         {
3555                                 if (IP == "*")
3556                                 {
3557                                         IP = "";
3558                                 }
3559                                 TreeSocket* listener = new TreeSocket(ServerInstance, IP.c_str(),Port,true,10);
3560                                 if (listener->GetState() == I_LISTENING)
3561                                 {
3562                                         Bindings.push_back(listener);
3563                                 }
3564                                 else
3565                                 {
3566                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3567                                         listener->Close();
3568                                         DELETE(listener);
3569                                 }
3570                         }
3571                 }
3572         }
3573         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3574         HideULines = Conf->ReadFlag("options","hideulines",0);
3575         LinkBlocks.clear();
3576         ValidIPs.clear();
3577         for (int j =0; j < Conf->Enumerate("link"); j++)
3578         {
3579                 Link L;
3580                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3581                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3582                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3583                 L.Port = Conf->ReadInteger("link","port",j,true);
3584                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3585                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3586                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3587                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3588                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3589                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3590                 /* Bugfix by brain, do not allow people to enter bad configurations */
3591                 if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3592                 {
3593                         ValidIPs.push_back(L.IPAddr);
3594
3595                         if (Allow.length())
3596                                 ValidIPs.push_back(Allow);
3597
3598                         /* Needs resolving */
3599                         insp_inaddr binip;
3600                         if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3601                         {
3602                                 try
3603                                 {
3604                                         SecurityIPResolver* sr = new SecurityIPResolver(ServerInstance, L.IPAddr, L);
3605                                         ServerInstance->AddResolver(sr);
3606                                 }
3607                                 catch (ModuleException& e)
3608                                 {
3609                                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3610                                 }
3611                         }
3612
3613                         LinkBlocks.push_back(L);
3614                         ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3615                 }
3616                 else
3617                 {
3618                         if (L.IPAddr == "")
3619                         {
3620                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3621                         }
3622                         else if (L.RecvPass == "")
3623                         {
3624                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3625                         }
3626                         else if (L.SendPass == "")
3627                         {
3628                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3629                         }
3630                         else if (L.Name == "")
3631                         {
3632                                 ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3633                         }
3634                         else if (!L.Port)
3635                         {
3636                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3637                         }
3638                 }
3639         }
3640         DELETE(Conf);
3641 }
3642
3643
3644 class ModuleSpanningTree : public Module
3645 {
3646         std::vector<TreeSocket*> Bindings;
3647         int line;
3648         int NumServers;
3649         unsigned int max_local;
3650         unsigned int max_global;
3651         cmd_rconnect* command_rconnect;
3652
3653  public:
3654
3655         ModuleSpanningTree(InspIRCd* Me)
3656                 : Module::Module(Me), max_local(0), max_global(0)
3657         {
3658
3659                 Bindings.clear();
3660
3661                 ::ServerInstance = Me;
3662
3663                 // Create the root of the tree
3664                 TreeRoot = new TreeServer(ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3665
3666                 ReadConfiguration(true);
3667
3668                 command_rconnect = new cmd_rconnect(ServerInstance, this);
3669                 ServerInstance->AddCommand(command_rconnect);
3670         }
3671
3672         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3673         {
3674                 std::string Parent = TreeRoot->GetName();
3675                 if (Current->GetParent())
3676                 {
3677                         Parent = Current->GetParent()->GetName();
3678                 }
3679                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3680                 {
3681                         if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3682                         {
3683                                 if (*user->oper)
3684                                 {
3685                                          ShowLinks(Current->GetChild(q),user,hops+1);
3686                                 }
3687                         }
3688                         else
3689                         {
3690                                 ShowLinks(Current->GetChild(q),user,hops+1);
3691                         }
3692                 }
3693                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3694                 if ((HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3695                         return;
3696                 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());
3697         }
3698
3699         int CountLocalServs()
3700         {
3701                 return TreeRoot->ChildCount();
3702         }
3703
3704         int CountServs()
3705         {
3706                 return serverlist.size();
3707         }
3708
3709         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3710         {
3711                 ShowLinks(TreeRoot,user,0);
3712                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3713                 return;
3714         }
3715
3716         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3717         {
3718                 unsigned int n_users = ServerInstance->UserCount();
3719
3720                 /* Only update these when someone wants to see them, more efficient */
3721                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3722                         max_local = ServerInstance->LocalUserCount();
3723                 if (n_users > max_global)
3724                         max_global = n_users;
3725
3726                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3727                 if (ServerInstance->OperCount())
3728                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3729                 if (ServerInstance->UnregisteredUserCount())
3730                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3731                 if (ServerInstance->ChannelCount())
3732                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3733                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3734                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3735                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3736                 return;
3737         }
3738
3739         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3740
3741         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3742         {
3743                 if (line < 128)
3744                 {
3745                         for (int t = 0; t < depth; t++)
3746                         {
3747                                 matrix[line][t] = ' ';
3748                         }
3749
3750                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3751                         // a 'Spacer' String to compensate.
3752                         char spacer[40];
3753
3754                         memset(spacer,' ',40);
3755                         if ((40 - Current->GetName().length() - depth) > 1) {
3756                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3757                         }
3758                         else
3759                         {
3760                                 spacer[5] = '\0';
3761                         }
3762
3763                         float percent;
3764                         char text[80];
3765                         if (ServerInstance->clientlist.size() == 0) {
3766                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3767                                 percent = 0;
3768                         }
3769                         else
3770                         {
3771                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3772                         }
3773                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3774                         totusers += Current->GetUserCount();
3775                         totservers++;
3776                         strlcpy(&matrix[line][depth],text,80);
3777                         line++;
3778                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3779                         {
3780                                 if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3781                                 {
3782                                         if (*user->oper)
3783                                         {
3784                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3785                                         }
3786                                 }
3787                                 else
3788                                 {
3789                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3790                                 }
3791                         }
3792                 }
3793         }
3794
3795         int HandleMotd(const char** parameters, int pcnt, userrec* user)
3796         {
3797                 if (pcnt > 0)
3798                 {
3799                         /* Remote MOTD, the server is within the 1st parameter */
3800                         std::deque<std::string> params;
3801                         params.push_back(parameters[0]);
3802
3803                         /* Send it out remotely, generate no reply yet */
3804                         TreeServer* s = FindServerMask(parameters[0]);
3805                         if (s)
3806                         {
3807                                 DoOneToOne(user->nick, "MOTD", params, s->GetName());
3808                         }
3809                         else
3810                         {
3811                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3812                         }
3813                         return 1;
3814                 }
3815                 return 0;
3816         }
3817
3818         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
3819         {
3820                 if (pcnt > 0)
3821                 {
3822                         /* Remote ADMIN, the server is within the 1st parameter */
3823                         std::deque<std::string> params;
3824                         params.push_back(parameters[0]);
3825
3826                         /* Send it out remotely, generate no reply yet */
3827                         TreeServer* s = FindServerMask(parameters[0]);
3828                         if (s)
3829                         {
3830                                 DoOneToOne(user->nick, "ADMIN", params, s->GetName());
3831                         }
3832                         else
3833                         {
3834                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3835                         }
3836                         return 1;
3837                 }
3838                 return 0;
3839         }
3840
3841         int HandleStats(const char** parameters, int pcnt, userrec* user)
3842         {
3843                 if (pcnt > 1)
3844                 {
3845                         /* Remote STATS, the server is within the 2nd parameter */
3846                         std::deque<std::string> params;
3847                         params.push_back(parameters[0]);
3848                         params.push_back(parameters[1]);
3849                         /* Send it out remotely, generate no reply yet */
3850                         TreeServer* s = FindServerMask(parameters[1]);
3851                         if (s)
3852                         {
3853                                 params[1] = s->GetName();
3854                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
3855                         }
3856                         else
3857                         {
3858                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3859                         }
3860                         return 1;
3861                 }
3862                 return 0;
3863         }
3864
3865         // Ok, prepare to be confused.
3866         // After much mulling over how to approach this, it struck me that
3867         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3868         // keeping track of a ton of ascii characters, and line by line
3869         // under recursion working out where to place them using multiplications
3870         // and divisons, we instead render the map onto a backplane of characters
3871         // (a character matrix), then draw the branches as a series of "L" shapes
3872         // from the nodes. This is not only friendlier on CPU it uses less stack.
3873
3874         void HandleMap(const char** parameters, int pcnt, userrec* user)
3875         {
3876                 // This array represents a virtual screen which we will
3877                 // "scratch" draw to, as the console device of an irc
3878                 // client does not provide for a proper terminal.
3879                 float totusers = 0;
3880                 float totservers = 0;
3881                 char matrix[128][80];
3882                 for (unsigned int t = 0; t < 128; t++)
3883                 {
3884                         matrix[t][0] = '\0';
3885                 }
3886                 line = 0;
3887                 // The only recursive bit is called here.
3888                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3889                 // Process each line one by one. The algorithm has a limit of
3890                 // 128 servers (which is far more than a spanning tree should have
3891                 // anyway, so we're ok). This limit can be raised simply by making
3892                 // the character matrix deeper, 128 rows taking 10k of memory.
3893                 for (int l = 1; l < line; l++)
3894                 {
3895                         // scan across the line looking for the start of the
3896                         // servername (the recursive part of the algorithm has placed
3897                         // the servers at indented positions depending on what they
3898                         // are related to)
3899                         int first_nonspace = 0;
3900                         while (matrix[l][first_nonspace] == ' ')
3901                         {
3902                                 first_nonspace++;
3903                         }
3904                         first_nonspace--;
3905                         // Draw the `- (corner) section: this may be overwritten by
3906                         // another L shape passing along the same vertical pane, becoming
3907                         // a |- (branch) section instead.
3908                         matrix[l][first_nonspace] = '-';
3909                         matrix[l][first_nonspace-1] = '`';
3910                         int l2 = l - 1;
3911                         // Draw upwards until we hit the parent server, causing possibly
3912                         // other corners (`-) to become branches (|-)
3913                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3914                         {
3915                                 matrix[l2][first_nonspace-1] = '|';
3916                                 l2--;
3917                         }
3918                 }
3919                 // dump the whole lot to the user. This is the easy bit, honest.
3920                 for (int t = 0; t < line; t++)
3921                 {
3922                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
3923                 }
3924                 float avg_users = totusers / totservers;
3925                 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);
3926         user->WriteServ("007 %s :End of /MAP",user->nick);
3927                 return;
3928         }
3929
3930         int HandleSquit(const char** parameters, int pcnt, userrec* user)
3931         {
3932                 TreeServer* s = FindServerMask(parameters[0]);
3933                 if (s)
3934                 {
3935                         if (s == TreeRoot)
3936                         {
3937                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
3938                                 return 1;
3939                         }
3940                         TreeSocket* sock = s->GetSocket();
3941                         if (sock)
3942                         {
3943                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
3944                                 ServerInstance->WriteOpers("*** SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
3945                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
3946                                 ServerInstance->SE->DelFd(sock);
3947                                 sock->Close();
3948                                 delete sock;
3949                         }
3950                         else
3951                         {
3952                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
3953                         }
3954                 }
3955                 else
3956                 {
3957                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
3958                 }
3959                 return 1;
3960         }
3961
3962         int HandleTime(const char** parameters, int pcnt, userrec* user)
3963         {
3964                 if ((IS_LOCAL(user)) && (pcnt))
3965                 {
3966                         TreeServer* found = FindServerMask(parameters[0]);
3967                         if (found)
3968                         {
3969                                 // we dont' override for local server
3970                                 if (found == TreeRoot)
3971                                         return 0;
3972
3973                                 std::deque<std::string> params;
3974                                 params.push_back(found->GetName());
3975                                 params.push_back(user->nick);
3976                                 DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
3977                         }
3978                         else
3979                         {
3980                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
3981                         }
3982                 }
3983                 return 1;
3984         }
3985
3986         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
3987         {
3988                 if ((IS_LOCAL(user)) && (pcnt > 1))
3989                 {
3990                         userrec* remote = ServerInstance->FindNick(parameters[1]);
3991                         if ((remote) && (remote->GetFd() < 0))
3992                         {
3993                                 std::deque<std::string> params;
3994                                 params.push_back(parameters[1]);
3995                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
3996                                 return 1;
3997                         }
3998                         else if (!remote)
3999                         {
4000                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4001                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4002                                 return 1;
4003                         }
4004                 }
4005                 return 0;
4006         }
4007
4008         void DoPingChecks(time_t curtime)
4009         {
4010                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
4011                 {
4012                         TreeServer* serv = TreeRoot->GetChild(j);
4013                         TreeSocket* sock = serv->GetSocket();
4014                         if (sock)
4015                         {
4016                                 if (curtime >= serv->NextPingTime())
4017                                 {
4018                                         if (serv->AnsweredLastPing())
4019                                         {
4020                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4021                                                 serv->SetNextPingTime(curtime + 60);
4022                                         }
4023                                         else
4024                                         {
4025                                                 // they didnt answer, boot them
4026                                                 ServerInstance->WriteOpers("*** Server \002%s\002 pinged out",serv->GetName().c_str());
4027                                                 sock->Squit(serv,"Ping timeout");
4028                                                 ServerInstance->SE->DelFd(sock);
4029                                                 sock->Close();
4030                                                 delete sock;
4031                                                 return;
4032                                         }
4033                                 }
4034                         }
4035                 }
4036         }
4037
4038         void AutoConnectServers(time_t curtime)
4039         {
4040                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4041                 {
4042                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4043                         {
4044                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4045                                 x->NextConnectTime = curtime + x->AutoConnect;
4046                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4047                                 if (!CheckDupe)
4048                                 {
4049                                         // an autoconnected server is not connected. Check if its time to connect it
4050                                         ServerInstance->WriteOpers("*** AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4051
4052                                         insp_inaddr binip;
4053
4054                                         /* Do we already have an IP? If so, no need to resolve it. */
4055                                         if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4056                                         {
4057                                                 TreeSocket* newsocket = new TreeSocket(ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4058                                                 if (newsocket->GetFd() > -1)
4059                                                 {
4060                                                 }
4061                                                 else
4062                                                 {
4063                                                         ServerInstance->WriteOpers("*** AUTOCONNECT: Error autoconnecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4064                                                         delete newsocket;
4065                                                 }
4066                                         }
4067                                         else
4068                                         {
4069                                                 try
4070                                                 {
4071                                                         ServernameResolver* snr = new ServernameResolver(ServerInstance,x->IPAddr, *x);
4072                                                         ServerInstance->AddResolver(snr);
4073                                                 }
4074                                                 catch (ModuleException& e)
4075                                                 {
4076                                                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4077                                                 }
4078                                         }
4079
4080                                 }
4081                         }
4082                 }
4083         }
4084
4085         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4086         {
4087                 // we've already checked if pcnt > 0, so this is safe
4088                 TreeServer* found = FindServerMask(parameters[0]);
4089                 if (found)
4090                 {
4091                         std::string Version = found->GetVersion();
4092                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4093                         if (found == TreeRoot)
4094                         {
4095                                 std::stringstream out(ServerInstance->Config->data005);
4096                                 std::string token = "";
4097                                 std::string line5 = "";
4098                                 int token_counter = 0;
4099
4100                                 while (!out.eof())
4101                                 {
4102                                         out >> token;
4103                                         line5 = line5 + token + " ";
4104                                         token_counter++;
4105
4106                                         if ((token_counter >= 13) || (out.eof() == true))
4107                                         {
4108                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4109                                                 line5 = "";
4110                                                 token_counter = 0;
4111                                         }
4112                                 }
4113                         }
4114                 }
4115                 else
4116                 {
4117                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4118                 }
4119                 return 1;
4120         }
4121
4122         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4123         {
4124                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4125                 {
4126                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4127                         {
4128                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4129                                 if (!CheckDupe)
4130                                 {
4131                                         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);
4132                                         insp_inaddr binip;
4133
4134                                         /* Do we already have an IP? If so, no need to resolve it. */
4135                                         if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4136                                         {
4137                                                 TreeSocket* newsocket = new TreeSocket(ServerInstance,x->IPAddr,x->Port,false,10,x->Name.c_str());
4138                                                 if (newsocket->GetFd() > -1)
4139                                                 {
4140                                                 }
4141                                                 else
4142                                                 {
4143                                                         ServerInstance->WriteOpers("*** CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4144                                                         delete newsocket;
4145                                                 }
4146                                         }
4147                                         else
4148                                         {
4149                                                 try
4150                                                 {
4151                                                         ServernameResolver* snr = new ServernameResolver(ServerInstance, x->IPAddr, *x);
4152                                                         ServerInstance->AddResolver(snr);
4153                                                 }
4154                                                 catch (ModuleException& e)
4155                                                 {
4156                                                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4157                                                 }
4158                                         }
4159                                         return 1;
4160                                 }
4161                                 else
4162                                 {
4163                                         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());
4164                                         return 1;
4165                                 }
4166                         }
4167                 }
4168                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4169                 return 1;
4170         }
4171
4172         virtual int OnStats(char statschar, userrec* user, string_list &results)
4173         {
4174                 if (statschar == 'c')
4175                 {
4176                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
4177                         {
4178                                 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');
4179                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
4180                         }
4181                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4182                         ServerInstance->WriteOpers("*** Notice: %s '%c' requested by %s (%s@%s)",(!strcmp(user->server,ServerInstance->Config->ServerName) ? "Stats" : "Remote stats"),statschar,user->nick,user->ident,user->host);
4183                         return 1;
4184                 }
4185                 return 0;
4186         }
4187
4188         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated)
4189         {
4190                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4191                 if (!validated)
4192                         return 0;
4193
4194                 if (command == "CONNECT")
4195                 {
4196                         return this->HandleConnect(parameters,pcnt,user);
4197                 }
4198                 else if (command == "STATS")
4199                 {
4200                         return this->HandleStats(parameters,pcnt,user);
4201                 }
4202                 else if (command == "MOTD")
4203                 {
4204                         return this->HandleMotd(parameters,pcnt,user);
4205                 }
4206                 else if (command == "ADMIN")
4207                 {
4208                         return this->HandleAdmin(parameters,pcnt,user);
4209                 }
4210                 else if (command == "SQUIT")
4211                 {
4212                         return this->HandleSquit(parameters,pcnt,user);
4213                 }
4214                 else if (command == "MAP")
4215                 {
4216                         this->HandleMap(parameters,pcnt,user);
4217                         return 1;
4218                 }
4219                 else if ((command == "TIME") && (pcnt > 0))
4220                 {
4221                         return this->HandleTime(parameters,pcnt,user);
4222                 }
4223                 else if (command == "LUSERS")
4224                 {
4225                         this->HandleLusers(parameters,pcnt,user);
4226                         return 1;
4227                 }
4228                 else if (command == "LINKS")
4229                 {
4230                         this->HandleLinks(parameters,pcnt,user);
4231                         return 1;
4232                 }
4233                 else if (command == "WHOIS")
4234                 {
4235                         if (pcnt > 1)
4236                         {
4237                                 // remote whois
4238                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4239                         }
4240                 }
4241                 else if ((command == "VERSION") && (pcnt > 0))
4242                 {
4243                         this->HandleVersion(parameters,pcnt,user);
4244                         return 1;
4245                 }
4246                 else if (ServerInstance->IsValidModuleCommand(command, pcnt, user))
4247                 {
4248                         // this bit of code cleverly routes all module commands
4249                         // to all remote severs *automatically* so that modules
4250                         // can just handle commands locally, without having
4251                         // to have any special provision in place for remote
4252                         // commands and linking protocols.
4253                         std::deque<std::string> params;
4254                         params.clear();
4255                         for (int j = 0; j < pcnt; j++)
4256                         {
4257                                 if (strchr(parameters[j],' '))
4258                                 {
4259                                         params.push_back(":" + std::string(parameters[j]));
4260                                 }
4261                                 else
4262                                 {
4263                                         params.push_back(std::string(parameters[j]));
4264                                 }
4265                         }
4266                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4267                         DoOneToMany(user->nick,command,params);
4268                 }
4269                 return 0;
4270         }
4271
4272         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4273         {
4274                 TreeServer* s = FindServer(servername);
4275                 if (s)
4276                 {
4277                         description = s->GetDesc();
4278                 }
4279         }
4280
4281         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4282         {
4283                 if (IS_LOCAL(source))
4284                 {
4285                         std::deque<std::string> params;
4286                         params.push_back(dest->nick);
4287                         params.push_back(channel->name);
4288                         DoOneToMany(source->nick,"INVITE",params);
4289                 }
4290         }
4291
4292         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4293         {
4294                 std::deque<std::string> params;
4295                 params.push_back(chan->name);
4296                 params.push_back(":"+topic);
4297                 DoOneToMany(user->nick,"TOPIC",params);
4298         }
4299
4300         virtual void OnWallops(userrec* user, const std::string &text)
4301         {
4302                 if (IS_LOCAL(user))
4303                 {
4304                         std::deque<std::string> params;
4305                         params.push_back(":"+text);
4306                         DoOneToMany(user->nick,"WALLOPS",params);
4307                 }
4308         }
4309
4310         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4311         {
4312                 if (target_type == TYPE_USER)
4313                 {
4314                         userrec* d = (userrec*)dest;
4315                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4316                         {
4317                                 std::deque<std::string> params;
4318                                 params.clear();
4319                                 params.push_back(d->nick);
4320                                 params.push_back(":"+text);
4321                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4322                         }
4323                 }
4324                 else if (target_type == TYPE_CHANNEL)
4325                 {
4326                         if (IS_LOCAL(user))
4327                         {
4328                                 chanrec *c = (chanrec*)dest;
4329                                 if (c)
4330                                 {
4331                                         std::string cname = c->name;
4332                                         if (status)
4333                                                 cname = status + cname;
4334                                         std::deque<TreeServer*> list;
4335                                         GetListOfServersForChannel(c,list);
4336                                         unsigned int ucount = list.size();
4337                                         for (unsigned int i = 0; i < ucount; i++)
4338                                         {
4339                                                 TreeSocket* Sock = list[i]->GetSocket();
4340                                                 if (Sock)
4341                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4342                                         }
4343                                 }
4344                         }
4345                 }
4346                 else if (target_type == TYPE_SERVER)
4347                 {
4348                         if (IS_LOCAL(user))
4349                         {
4350                                 char* target = (char*)dest;
4351                                 std::deque<std::string> par;
4352                                 par.push_back(target);
4353                                 par.push_back(":"+text);
4354                                 DoOneToMany(user->nick,"NOTICE",par);
4355                         }
4356                 }
4357         }
4358
4359         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4360         {
4361                 if (target_type == TYPE_USER)
4362                 {
4363                         // route private messages which are targetted at clients only to the server
4364                         // which needs to receive them
4365                         userrec* d = (userrec*)dest;
4366                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4367                         {
4368                                 std::deque<std::string> params;
4369                                 params.clear();
4370                                 params.push_back(d->nick);
4371                                 params.push_back(":"+text);
4372                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4373                         }
4374                 }
4375                 else if (target_type == TYPE_CHANNEL)
4376                 {
4377                         if (IS_LOCAL(user))
4378                         {
4379                                 chanrec *c = (chanrec*)dest;
4380                                 if (c)
4381                                 {
4382                                         std::string cname = c->name;
4383                                         if (status)
4384                                                 cname = status + cname;
4385                                         std::deque<TreeServer*> list;
4386                                         GetListOfServersForChannel(c,list);
4387                                         unsigned int ucount = list.size();
4388                                         for (unsigned int i = 0; i < ucount; i++)
4389                                         {
4390                                                 TreeSocket* Sock = list[i]->GetSocket();
4391                                                 if (Sock)
4392                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4393                                         }
4394                                 }
4395                         }
4396                 }
4397                 else if (target_type == TYPE_SERVER)
4398                 {
4399                         if (IS_LOCAL(user))
4400                         {
4401                                 char* target = (char*)dest;
4402                                 std::deque<std::string> par;
4403                                 par.push_back(target);
4404                                 par.push_back(":"+text);
4405                                 DoOneToMany(user->nick,"PRIVMSG",par);
4406                         }
4407                 }
4408         }
4409
4410         virtual void OnBackgroundTimer(time_t curtime)
4411         {
4412                 AutoConnectServers(curtime);
4413                 DoPingChecks(curtime);
4414         }
4415
4416         virtual void OnUserJoin(userrec* user, chanrec* channel)
4417         {
4418                 // Only do this for local users
4419                 if (IS_LOCAL(user))
4420                 {
4421                         std::deque<std::string> params;
4422                         params.clear();
4423                         params.push_back(channel->name);
4424
4425                         if (channel->GetUserCounter() > 1)
4426                         {
4427                                 // not the first in the channel
4428                                 DoOneToMany(user->nick,"JOIN",params);
4429                         }
4430                         else
4431                         {
4432                                 // first in the channel, set up their permissions
4433                                 // and the channel TS with FJOIN.
4434                                 char ts[24];
4435                                 snprintf(ts,24,"%lu",(unsigned long)channel->age);
4436                                 params.clear();
4437                                 params.push_back(channel->name);
4438                                 params.push_back(ts);
4439                                 params.push_back("@,"+std::string(user->nick));
4440                                 DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4441                         }
4442                 }
4443         }
4444
4445         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4446         {
4447                 // only occurs for local clients
4448                 if (user->registered != REG_ALL)
4449                         return;
4450                 std::deque<std::string> params;
4451                 params.push_back(newhost);
4452                 DoOneToMany(user->nick,"FHOST",params);
4453         }
4454
4455         virtual void OnChangeName(userrec* user, const std::string &gecos)
4456         {
4457                 // only occurs for local clients
4458                 if (user->registered != REG_ALL)
4459                         return;
4460                 std::deque<std::string> params;
4461                 params.push_back(gecos);
4462                 DoOneToMany(user->nick,"FNAME",params);
4463         }
4464
4465         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4466         {
4467                 if (IS_LOCAL(user))
4468                 {
4469                         std::deque<std::string> params;
4470                         params.push_back(channel->name);
4471                         if (partmessage != "")
4472                                 params.push_back(":"+partmessage);
4473                         DoOneToMany(user->nick,"PART",params);
4474                 }
4475         }
4476
4477         virtual void OnUserConnect(userrec* user)
4478         {
4479                 char agestr[MAXBUF];
4480                 if (IS_LOCAL(user))
4481                 {
4482                         std::deque<std::string> params;
4483                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4484                         params.push_back(agestr);
4485                         params.push_back(user->nick);
4486                         params.push_back(user->host);
4487                         params.push_back(user->dhost);
4488                         params.push_back(user->ident);
4489                         params.push_back("+"+std::string(user->FormatModes()));
4490                         params.push_back(user->GetIPString());
4491                         params.push_back(":"+std::string(user->fullname));
4492                         DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4493
4494                         // User is Local, change needs to be reflected!
4495                         TreeServer* SourceServer = FindServer(user->server);
4496                         if (SourceServer)
4497                         {
4498                                 SourceServer->AddUserCount();
4499                         }
4500
4501                 }
4502         }
4503
4504         virtual void OnUserQuit(userrec* user, const std::string &reason)
4505         {
4506                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4507                 {
4508                         std::deque<std::string> params;
4509                         params.push_back(":"+reason);
4510                         DoOneToMany(user->nick,"QUIT",params);
4511                 }
4512                 // Regardless, We need to modify the user Counts..
4513                 TreeServer* SourceServer = FindServer(user->server);
4514                 if (SourceServer)
4515                 {
4516                         SourceServer->DelUserCount();
4517                 }
4518
4519         }
4520
4521         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4522         {
4523                 if (IS_LOCAL(user))
4524                 {
4525                         std::deque<std::string> params;
4526                         params.push_back(user->nick);
4527                         DoOneToMany(oldnick,"NICK",params);
4528                 }
4529         }
4530
4531         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4532         {
4533                 if ((source) && (IS_LOCAL(source)))
4534                 {
4535                         std::deque<std::string> params;
4536                         params.push_back(chan->name);
4537                         params.push_back(user->nick);
4538                         params.push_back(":"+reason);
4539                         DoOneToMany(source->nick,"KICK",params);
4540                 }
4541                 else if (!source)
4542                 {
4543                         std::deque<std::string> params;
4544                         params.push_back(chan->name);
4545                         params.push_back(user->nick);
4546                         params.push_back(":"+reason);
4547                         DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4548                 }
4549         }
4550
4551         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4552         {
4553                 std::deque<std::string> params;
4554                 params.push_back(dest->nick);
4555                 params.push_back(":"+reason);
4556                 DoOneToMany(source->nick,"KILL",params);
4557         }
4558
4559         virtual void OnRehash(const std::string &parameter)
4560         {
4561                 if (parameter != "")
4562                 {
4563                         std::deque<std::string> params;
4564                         params.push_back(parameter);
4565                         DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4566                         // check for self
4567                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4568                         {
4569                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4570                                 ServerInstance->RehashServer();
4571                         }
4572                 }
4573                 ReadConfiguration(false);
4574         }
4575
4576         // note: the protocol does not allow direct umode +o except
4577         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4578         // locally.
4579         virtual void OnOper(userrec* user, const std::string &opertype)
4580         {
4581                 if (IS_LOCAL(user))
4582                 {
4583                         std::deque<std::string> params;
4584                         params.push_back(opertype);
4585                         DoOneToMany(user->nick,"OPERTYPE",params);
4586                 }
4587         }
4588
4589         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4590         {
4591                 if (IS_LOCAL(source))
4592                 {
4593                         char type[8];
4594                         snprintf(type,8,"%cLINE",linetype);
4595                         std::string stype = type;
4596                         if (adding)
4597                         {
4598                                 char sduration[MAXBUF];
4599                                 snprintf(sduration,MAXBUF,"%ld",duration);
4600                                 std::deque<std::string> params;
4601                                 params.push_back(host);
4602                                 params.push_back(sduration);
4603                                 params.push_back(":"+reason);
4604                                 DoOneToMany(source->nick,stype,params);
4605                         }
4606                         else
4607                         {
4608                                 std::deque<std::string> params;
4609                                 params.push_back(host);
4610                                 DoOneToMany(source->nick,stype,params);
4611                         }
4612                 }
4613         }
4614
4615         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4616         {
4617                 OnLine(source,hostmask,true,'G',duration,reason);
4618         }
4619
4620         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4621         {
4622                 OnLine(source,ipmask,true,'Z',duration,reason);
4623         }
4624
4625         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4626         {
4627                 OnLine(source,nickmask,true,'Q',duration,reason);
4628         }
4629
4630         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4631         {
4632                 OnLine(source,hostmask,true,'E',duration,reason);
4633         }
4634
4635         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4636         {
4637                 OnLine(source,hostmask,false,'G',0,"");
4638         }
4639
4640         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4641         {
4642                 OnLine(source,ipmask,false,'Z',0,"");
4643         }
4644
4645         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4646         {
4647                 OnLine(source,nickmask,false,'Q',0,"");
4648         }
4649
4650         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4651         {
4652                 OnLine(source,hostmask,false,'E',0,"");
4653         }
4654
4655         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4656         {
4657                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4658                 {
4659                         if (target_type == TYPE_USER)
4660                         {
4661                                 userrec* u = (userrec*)dest;
4662                                 std::deque<std::string> params;
4663                                 params.push_back(u->nick);
4664                                 params.push_back(text);
4665                                 DoOneToMany(user->nick,"MODE",params);
4666                         }
4667                         else
4668                         {
4669                                 chanrec* c = (chanrec*)dest;
4670                                 std::deque<std::string> params;
4671                                 params.push_back(c->name);
4672                                 params.push_back(text);
4673                                 DoOneToMany(user->nick,"MODE",params);
4674                         }
4675                 }
4676         }
4677
4678         virtual void OnSetAway(userrec* user)
4679         {
4680                 if (IS_LOCAL(user))
4681                 {
4682                         std::deque<std::string> params;
4683                         params.push_back(":"+std::string(user->awaymsg));
4684                         DoOneToMany(user->nick,"AWAY",params);
4685                 }
4686         }
4687
4688         virtual void OnCancelAway(userrec* user)
4689         {
4690                 if (IS_LOCAL(user))
4691                 {
4692                         std::deque<std::string> params;
4693                         params.clear();
4694                         DoOneToMany(user->nick,"AWAY",params);
4695                 }
4696         }
4697
4698         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4699         {
4700                 TreeSocket* s = (TreeSocket*)opaque;
4701                 if (target)
4702                 {
4703                         if (target_type == TYPE_USER)
4704                         {
4705                                 userrec* u = (userrec*)target;
4706                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4707                         }
4708                         else
4709                         {
4710                                 chanrec* c = (chanrec*)target;
4711                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4712                         }
4713                 }
4714         }
4715
4716         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4717         {
4718                 TreeSocket* s = (TreeSocket*)opaque;
4719                 if (target)
4720                 {
4721                         if (target_type == TYPE_USER)
4722                         {
4723                                 userrec* u = (userrec*)target;
4724                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4725                         }
4726                         else if (target_type == TYPE_OTHER)
4727                         {
4728                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4729                         }
4730                         else if (target_type == TYPE_CHANNEL)
4731                         {
4732                                 chanrec* c = (chanrec*)target;
4733                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4734                         }
4735                 }
4736         }
4737
4738         virtual void OnEvent(Event* event)
4739         {
4740                 if (event->GetEventID() == "send_metadata")
4741                 {
4742                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4743                         if (params->size() < 3)
4744                                 return;
4745                         (*params)[2] = ":" + (*params)[2];
4746                         DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4747                 }
4748                 else if (event->GetEventID() == "send_mode")
4749                 {
4750                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4751                         if (params->size() < 2)
4752                                 return;
4753                         // Insert the TS value of the object, either userrec or chanrec
4754                         time_t ourTS = 0;
4755                         userrec* a = ServerInstance->FindNick((*params)[0]);
4756                         if (a)
4757                         {
4758                                 ourTS = a->age;
4759                         }
4760                         else
4761                         {
4762                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4763                                 if (a)
4764                                 {
4765                                         ourTS = a->age;
4766                                 }
4767                         }
4768                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4769                         DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4770                 }
4771         }
4772
4773         virtual ~ModuleSpanningTree()
4774         {
4775         }
4776
4777         virtual Version GetVersion()
4778         {
4779                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
4780         }
4781
4782         void Implements(char* List)
4783         {
4784                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
4785                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
4786                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
4787                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
4788                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
4789                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
4790                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = 1;
4791         }
4792
4793         /* It is IMPORTANT that m_spanningtree is the last module in the chain
4794          * so that any activity it sees is FINAL, e.g. we arent going to send out
4795          * a NICK message before m_cloaking has finished putting the +x on the user,
4796          * etc etc.
4797          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
4798          * the module call queue.
4799          */
4800         Priority Prioritize()
4801         {
4802                 return PRIORITY_LAST;
4803         }
4804 };
4805
4806
4807 class ModuleSpanningTreeFactory : public ModuleFactory
4808 {
4809  public:
4810         ModuleSpanningTreeFactory()
4811         {
4812         }
4813
4814         ~ModuleSpanningTreeFactory()
4815         {
4816         }
4817
4818         virtual Module * CreateModule(InspIRCd* Me)
4819         {
4820                 TreeProtocolModule = new ModuleSpanningTree(Me);
4821                 return TreeProtocolModule;
4822         }
4823
4824 };
4825
4826
4827 extern "C" void * init_module( void )
4828 {
4829         return new ModuleSpanningTreeFactory;
4830 }