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                 if (params[6].find_first_of(":") != std::string::npos)
1739                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1740                 else
1741                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1742
1743                 this->Instance->WriteOpers("*** Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1744
1745                 params[7] = ":" + params[7];
1746                 DoOneToAllButSender(source,"NICK",params,source);
1747
1748                 // Increment the Source Servers User Count..
1749                 TreeServer* SourceServer = FindServer(source);
1750                 if (SourceServer)
1751                 {
1752                         ServerInstance->Log(DEBUG,"Found source server of %s",_new->nick);
1753                         SourceServer->AddUserCount();
1754                 }
1755
1756                 return true;
1757         }
1758
1759         /* Send one or more FJOINs for a channel of users.
1760          * If the length of a single line is more than 480-NICKMAX
1761          * in length, it is split over multiple lines.
1762          */
1763         void SendFJoins(TreeServer* Current, chanrec* c)
1764         {
1765                 ServerInstance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1766                 char list[MAXBUF];
1767                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1768
1769                 size_t dlen, curlen;
1770                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1771                 int numusers = 0;
1772                 char* ptr = list + dlen;
1773
1774                 CUList *ulist = c->GetUsers();
1775                 std::vector<userrec*> specific_halfop;
1776                 std::vector<userrec*> specific_voice;
1777                 std::string modes = "";
1778                 std::string params = "";
1779
1780                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1781                 {
1782                         // The first parameter gets a : before it
1783                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1784
1785                         curlen += ptrlen;
1786                         ptr += ptrlen;
1787
1788                         numusers++;
1789
1790                         if (curlen > (480-NICKMAX))
1791                         {
1792                                 this->WriteLine(list);
1793                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1794                                 ptr = list + dlen;
1795                                 ptrlen = 0;
1796                                 numusers = 0;
1797                         }
1798                 }
1799
1800                 if (numusers)
1801                         this->WriteLine(list);
1802
1803                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1804                 {
1805                         modes.append("b");
1806                         params.append(b->data).append(" ");
1807                 }
1808                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1809         }
1810
1811         /* Send G, Q, Z and E lines */
1812         void SendXLines(TreeServer* Current)
1813         {
1814                 char data[MAXBUF];
1815                 std::string n = this->Instance->Config->ServerName;
1816                 const char* sn = n.c_str();
1817                 int iterations = 0;
1818                 /* Yes, these arent too nice looking, but they get the job done */
1819                 for (std::vector<ZLine>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1820                 {
1821                         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);
1822                         this->WriteLine(data);
1823                 }
1824                 for (std::vector<QLine>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1825                 {
1826                         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);
1827                         this->WriteLine(data);
1828                 }
1829                 for (std::vector<GLine>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1830                 {
1831                         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);
1832                         this->WriteLine(data);
1833                 }
1834                 for (std::vector<ELine>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1835                 {
1836                         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);
1837                         this->WriteLine(data);
1838                 }
1839                 for (std::vector<ZLine>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1840                 {
1841                         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);
1842                         this->WriteLine(data);
1843                 }
1844                 for (std::vector<QLine>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1845                 {
1846                         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);
1847                         this->WriteLine(data);
1848                 }
1849                 for (std::vector<GLine>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1850                 {
1851                         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);
1852                         this->WriteLine(data);
1853                 }
1854                 for (std::vector<ELine>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1855                 {
1856                         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);
1857                         this->WriteLine(data);
1858                 }
1859         }
1860
1861         /* Send channel modes and topics */
1862         void SendChannelModes(TreeServer* Current)
1863         {
1864                 char data[MAXBUF];
1865                 std::deque<std::string> list;
1866                 int iterations = 0;
1867                 std::string n = this->Instance->Config->ServerName;
1868                 const char* sn = n.c_str();
1869                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1870                 {
1871                         SendFJoins(Current, c->second);
1872                         if (*c->second->topic)
1873                         {
1874                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1875                                 this->WriteLine(data);
1876                         }
1877                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1878                         list.clear();
1879                         c->second->GetExtList(list);
1880                         for (unsigned int j = 0; j < list.size(); j++)
1881                         {
1882                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1883                         }
1884                 }
1885         }
1886
1887         /* send all users and their oper state/modes */
1888         void SendUsers(TreeServer* Current)
1889         {
1890                 char data[MAXBUF];
1891                 std::deque<std::string> list;
1892                 int iterations = 0;
1893                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
1894                 {
1895                         if (u->second->registered == REG_ALL)
1896                         {
1897                                 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);
1898                                 this->WriteLine(data);
1899                                 if (*u->second->oper)
1900                                 {
1901                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1902                                 }
1903                                 if (*u->second->awaymsg)
1904                                 {
1905                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1906                                 }
1907                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1908                                 list.clear();
1909                                 u->second->GetExtList(list);
1910                                 for (unsigned int j = 0; j < list.size(); j++)
1911                                 {
1912                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1913                                 }
1914                         }
1915                 }
1916         }
1917
1918         /* This function is called when we want to send a netburst to a local
1919          * server. There is a set order we must do this, because for example
1920          * users require their servers to exist, and channels require their
1921          * users to exist. You get the idea.
1922          */
1923         void DoBurst(TreeServer* s)
1924         {
1925                 std::string burst = "BURST "+ConvToStr(time(NULL));
1926                 std::string endburst = "ENDBURST";
1927                 // Because by the end of the netburst, it  could be gone!
1928                 std::string name = s->GetName();
1929                 this->Instance->WriteOpers("*** Bursting to \2"+name+"\2.");
1930                 this->WriteLine(burst);
1931                 /* send our version string */
1932                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
1933                 /* Send server tree */
1934                 this->SendServers(TreeRoot,s,1);
1935                 /* Send users and their oper status */
1936                 this->SendUsers(s);
1937                 /* Send everything else (channel modes, xlines etc) */
1938                 this->SendChannelModes(s);
1939                 this->SendXLines(s);
1940                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1941                 this->WriteLine(endburst);
1942                 this->Instance->WriteOpers("*** Finished bursting to \2"+name+"\2.");
1943         }
1944
1945         /* This function is called when we receive data from a remote
1946          * server. We buffer the data in a std::string (it doesnt stay
1947          * there for long), reading using InspSocket::Read() which can
1948          * read up to 16 kilobytes in one operation.
1949          *
1950          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1951          * THE SOCKET OBJECT FOR US.
1952          */
1953         virtual bool OnDataReady()
1954         {
1955                 char* data = this->Read();
1956                 /* Check that the data read is a valid pointer and it has some content */
1957                 if (data && *data)
1958                 {
1959                         this->in_buffer.append(data);
1960                         /* While there is at least one new line in the buffer,
1961                          * do something useful (we hope!) with it.
1962                          */
1963                         while (in_buffer.find("\n") != std::string::npos)
1964                         {
1965                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1966                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1967                                 if (ret.find("\r") != std::string::npos)
1968                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1969                                 /* Process this one, abort if it
1970                                  * didnt return true.
1971                                  */
1972                                 if (this->ctx_in)
1973                                 {
1974                                         char out[1024];
1975                                         char result[1024];
1976                                         memset(result,0,1024);
1977                                         memset(out,0,1024);
1978                                         ServerInstance->Log(DEBUG,"Original string '%s'",ret.c_str());
1979                                         /* ERROR + CAPAB is still allowed unencryped */
1980                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1981                                         {
1982                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1983                                                 if ((nbytes > 0) && (nbytes < 1024))
1984                                                 {
1985                                                         ServerInstance->Log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1986                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1987                                                         for (int t = 0; t < nbytes; t++)
1988                                                                 if (result[t] == '\7') result[t] = 0;
1989                                                         ret = result;
1990                                                 }
1991                                         }
1992                                 }
1993                                 if (!this->ProcessLine(ret))
1994                                 {
1995                                         ServerInstance->Log(DEBUG,"ProcessLine says no!");
1996                                         return false;
1997                                 }
1998                         }
1999                         return true;
2000                 }
2001                 /* EAGAIN returns an empty but non-NULL string, so this
2002                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2003                  */
2004                 return (data && !*data);
2005         }
2006
2007         int WriteLine(std::string line)
2008         {
2009                 ServerInstance->Log(DEBUG,"OUT: %s",line.c_str());
2010                 if (this->ctx_out)
2011                 {
2012                         char result[10240];
2013                         char result64[10240];
2014                         if (this->keylength)
2015                         {
2016                                 // pad it to the key length
2017                                 int n = this->keylength - (line.length() % this->keylength);
2018                                 if (n)
2019                                 {
2020                                         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);
2021                                         line.append(n,'\7');
2022                                 }
2023                         }
2024                         unsigned int ll = line.length();
2025                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2026                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2027                         line = result64;
2028                         //int from64tobits(char *out, const char *in, int maxlen);
2029                 }
2030                 return this->Write(line + "\r\n");
2031         }
2032
2033         /* Handle ERROR command */
2034         bool Error(std::deque<std::string> &params)
2035         {
2036                 if (params.size() < 1)
2037                         return false;
2038                 this->Instance->WriteOpers("*** ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2039                 /* we will return false to cause the socket to close. */
2040                 return false;
2041         }
2042
2043         /* remote MOTD. leet, huh? */
2044         bool Motd(std::string prefix, std::deque<std::string> &params)
2045         {
2046                 if (params.size() > 0)
2047                 {
2048                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2049                         {
2050                                 /* It's for our server */
2051                                 string_list results;
2052                                 userrec* source = this->Instance->FindNick(prefix);
2053
2054                                 if (source)
2055                                 {
2056                                         std::deque<std::string> par;
2057                                         par.push_back(prefix);
2058                                         par.push_back("");
2059
2060                                         if (!ServerInstance->Config->MOTD.size())
2061                                         {
2062                                                 par[1] = std::string("::")+ServerInstance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2063                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2064                                                 return true;
2065                                         }
2066
2067                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 375 "+source->nick+" :"+ServerInstance->Config->ServerName+" message of the day";
2068                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2069
2070                                         for (unsigned int i = 0; i < ServerInstance->Config->MOTD.size(); i++)
2071                                         {
2072                                                 par[1] = std::string("::")+ServerInstance->Config->ServerName+" 372 "+source->nick+" :- "+ServerInstance->Config->MOTD[i];
2073                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2074                                         }
2075
2076                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2077                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2078                                 }
2079                         }
2080                         else
2081                         {
2082                                 /* Pass it on */
2083                                 userrec* source = this->Instance->FindNick(prefix);
2084                                 if (source)
2085                                         DoOneToOne(prefix, "MOTD", params, params[0]);
2086                         }
2087                 }
2088                 return true;
2089         }
2090
2091         /* remote ADMIN. leet, huh? */
2092         bool Admin(std::string prefix, std::deque<std::string> &params)
2093         {
2094                 if (params.size() > 0)
2095                 {
2096                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2097                         {
2098                                 /* It's for our server */
2099                                 string_list results;
2100                                 userrec* source = this->Instance->FindNick(prefix);
2101
2102                                 if (source)
2103                                 {
2104                                         std::deque<std::string> par;
2105                                         par.push_back(prefix);
2106                                         par.push_back("");
2107
2108                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+ServerInstance->Config->ServerName;
2109                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2110
2111                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 257 "+source->nick+" :Name     - "+ServerInstance->Config->AdminName;
2112                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2113
2114                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+ServerInstance->Config->AdminNick;
2115                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2116
2117                                         par[1] = std::string("::")+ServerInstance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+ServerInstance->Config->AdminEmail;
2118                                         DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2119                                 }
2120                         }
2121                         else
2122                         {
2123                                 /* Pass it on */
2124                                 userrec* source = this->Instance->FindNick(prefix);
2125                                 if (source)
2126                                         DoOneToOne(prefix, "ADMIN", params, params[0]);
2127                         }
2128                 }
2129                 return true;
2130         }
2131
2132         bool Stats(std::string prefix, std::deque<std::string> &params)
2133         {
2134                 /* Get the reply to a STATS query if it matches this servername,
2135                  * and send it back as a load of PUSH queries
2136                  */
2137                 if (params.size() > 1)
2138                 {
2139                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2140                         {
2141                                 /* It's for our server */
2142                                 string_list results;
2143                                 userrec* source = this->Instance->FindNick(prefix);
2144                                 if (source)
2145                                 {
2146                                         std::deque<std::string> par;
2147                                         par.push_back(prefix);
2148                                         par.push_back("");
2149                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2150                                         for (size_t i = 0; i < results.size(); i++)
2151                                         {
2152                                                 par[1] = "::" + results[i];
2153                                                 DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2154                                         }
2155                                 }
2156                         }
2157                         else
2158                         {
2159                                 /* Pass it on */
2160                                 userrec* source = this->Instance->FindNick(prefix);
2161                                 if (source)
2162                                         DoOneToOne(prefix, "STATS", params, params[1]);
2163                         }
2164                 }
2165                 return true;
2166         }
2167
2168
2169         /* Because the core won't let users or even SERVERS set +o,
2170          * we use the OPERTYPE command to do this.
2171          */
2172         bool OperType(std::string prefix, std::deque<std::string> &params)
2173         {
2174                 if (params.size() != 1)
2175                 {
2176                         ServerInstance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2177                         return true;
2178                 }
2179                 std::string opertype = params[0];
2180                 userrec* u = this->Instance->FindNick(prefix);
2181                 if (u)
2182                 {
2183                         u->modes[UM_OPERATOR] = 1;
2184                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2185                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2186                 }
2187                 return true;
2188         }
2189
2190         /* Because Andy insists that services-compatible servers must
2191          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2192          */
2193         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2194         {
2195                 if (params.size() < 3)
2196                         return true;
2197
2198                 userrec* u = this->Instance->FindNick(params[0]);
2199
2200                 if (u)
2201                 {
2202                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2203                         if (IS_LOCAL(u))
2204                         {
2205                                 std::deque<std::string> par;
2206                                 par.push_back(params[1]);
2207                                 /* This is not required as one is sent in OnUserPostNick below
2208                                  */
2209                                 //DoOneToMany(u->nick,"NICK",par);
2210                                 if (!u->ForceNickChange(params[1].c_str()))
2211                                 {
2212                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2213                                         return true;
2214                                 }
2215                                 u->age = atoi(params[2].c_str());
2216                         }
2217                 }
2218                 return true;
2219         }
2220
2221         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2222         {
2223                 if (params.size() < 2)
2224                         return true;
2225
2226                 userrec* u = this->Instance->FindNick(params[0]);
2227
2228                 if (u)
2229                 {
2230                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2231                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2232                 }
2233                 return true;
2234         }
2235
2236         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2237         {
2238                 if (params.size() < 1)
2239                         return false;
2240
2241                 std::string servermask = params[0];
2242
2243                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2244                 {
2245                         this->Instance->WriteOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
2246                         this->Instance->RehashServer();
2247                         ReadConfiguration(false);
2248                 }
2249                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2250                 return true;
2251         }
2252
2253         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2254         {
2255                 if (params.size() != 2)
2256                         return true;
2257
2258                 std::string nick = params[0];
2259                 userrec* u = this->Instance->FindNick(prefix);
2260                 userrec* who = this->Instance->FindNick(nick);
2261
2262                 if (who)
2263                 {
2264                         /* Prepend kill source, if we don't have one */
2265                         std::string sourceserv = prefix;
2266                         if (u)
2267                         {
2268                                 sourceserv = u->server;
2269                         }
2270                         if (*(params[1].c_str()) != '[')
2271                         {
2272                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2273                         }
2274                         std::string reason = params[1];
2275                         params[1] = ":" + params[1];
2276                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2277                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2278                         userrec::QuitUser(this->Instance,who,reason);
2279                 }
2280                 return true;
2281         }
2282
2283         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2284         {
2285                 if (params.size() < 1)
2286                         return true;
2287
2288                 if (params.size() == 1)
2289                 {
2290                         TreeServer* ServerSource = FindServer(prefix);
2291                         if (ServerSource)
2292                         {
2293                                 ServerSource->SetPingFlag();
2294                         }
2295                 }
2296                 else
2297                 {
2298                         std::string forwardto = params[1];
2299                         if (forwardto == this->Instance->Config->ServerName)
2300                         {
2301                                 /*
2302                                  * this is a PONG for us
2303                                  * if the prefix is a user, check theyre local, and if they are,
2304                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2305                                  * Services might want to send these s->s, but we dont need to yet.
2306                                  */
2307                                 userrec* u = this->Instance->FindNick(prefix);
2308
2309                                 if (u)
2310                                 {
2311                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2312                                 }
2313                         }
2314                         else
2315                         {
2316                                 // not for us, pass it on :)
2317                                 DoOneToOne(prefix,"PONG",params,forwardto);
2318                         }
2319                 }
2320
2321                 return true;
2322         }
2323
2324         bool MetaData(std::string prefix, std::deque<std::string> &params)
2325         {
2326                 if (params.size() < 3)
2327                         return true;
2328
2329                 TreeServer* ServerSource = FindServer(prefix);
2330
2331                 if (ServerSource)
2332                 {
2333                         if (params[0] == "*")
2334                         {
2335                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2336                         }
2337                         else if (*(params[0].c_str()) == '#')
2338                         {
2339                                 chanrec* c = this->Instance->FindChan(params[0]);
2340                                 if (c)
2341                                 {
2342                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2343                                 }
2344                         }
2345                         else if (*(params[0].c_str()) != '#')
2346                         {
2347                                 userrec* u = this->Instance->FindNick(params[0]);
2348                                 if (u)
2349                                 {
2350                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2351                                 }
2352                         }
2353                 }
2354
2355                 params[2] = ":" + params[2];
2356                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2357                 return true;
2358         }
2359
2360         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2361         {
2362                 if (params.size() < 1)
2363                         return true;
2364
2365                 TreeServer* ServerSource = FindServer(prefix);
2366
2367                 if (ServerSource)
2368                 {
2369                         ServerSource->SetVersion(params[0]);
2370                 }
2371                 params[0] = ":" + params[0];
2372                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2373                 return true;
2374         }
2375
2376         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2377         {
2378                 if (params.size() < 1)
2379                         return true;
2380
2381                 userrec* u = this->Instance->FindNick(prefix);
2382
2383                 if (u)
2384                 {
2385                         u->ChangeDisplayedHost(params[0].c_str());
2386                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2387                 }
2388                 return true;
2389         }
2390
2391         bool AddLine(std::string prefix, std::deque<std::string> &params)
2392         {
2393                 if (params.size() < 6)
2394                         return true;
2395
2396                 bool propogate = false;
2397
2398                 switch (*(params[0].c_str()))
2399                 {
2400                         case 'Z':
2401                                 propogate = ServerInstance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2402                                 ServerInstance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2403                         break;
2404                         case 'Q':
2405                                 propogate = ServerInstance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2406                                 ServerInstance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2407                         break;
2408                         case 'E':
2409                                 propogate = ServerInstance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2410                                 ServerInstance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2411                         break;
2412                         case 'G':
2413                                 propogate = ServerInstance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2414                                 ServerInstance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2415                         break;
2416                         case 'K':
2417                                 propogate = ServerInstance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2418                         break;
2419                         default:
2420                                 /* Just in case... */
2421                                 this->Instance->WriteOpers("*** \2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2422                                 propogate = false;
2423                         break;
2424                 }
2425
2426                 /* Send it on its way */
2427                 if (propogate)
2428                 {
2429                         if (atoi(params[4].c_str()))
2430                         {
2431                                 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());
2432                         }
2433                         else
2434                         {
2435                                 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());
2436                         }
2437                         params[5] = ":" + params[5];
2438                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2439                 }
2440                 if (!this->bursting)
2441                 {
2442                         ServerInstance->Log(DEBUG,"Applying lines...");
2443                         ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2444                 }
2445                 return true;
2446         }
2447
2448         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2449         {
2450                 if (params.size() < 1)
2451                         return true;
2452
2453                 userrec* u = this->Instance->FindNick(prefix);
2454
2455                 if (u)
2456                 {
2457                         u->ChangeName(params[0].c_str());
2458                         params[0] = ":" + params[0];
2459                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2460                 }
2461                 return true;
2462         }
2463
2464         bool Whois(std::string prefix, std::deque<std::string> &params)
2465         {
2466                 if (params.size() < 1)
2467                         return true;
2468
2469                 ServerInstance->Log(DEBUG,"In IDLE command");
2470                 userrec* u = this->Instance->FindNick(prefix);
2471
2472                 if (u)
2473                 {
2474                         ServerInstance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2475                         // an incoming request
2476                         if (params.size() == 1)
2477                         {
2478                                 userrec* x = this->Instance->FindNick(params[0]);
2479                                 if ((x) && (IS_LOCAL(x)))
2480                                 {
2481                                         userrec* x = this->Instance->FindNick(params[0]);
2482                                         ServerInstance->Log(DEBUG,"Got IDLE");
2483                                         char signon[MAXBUF];
2484                                         char idle[MAXBUF];
2485                                         ServerInstance->Log(DEBUG,"Sending back IDLE 3");
2486                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2487                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2488                                         std::deque<std::string> par;
2489                                         par.push_back(prefix);
2490                                         par.push_back(signon);
2491                                         par.push_back(idle);
2492                                         // ours, we're done, pass it BACK
2493                                         DoOneToOne(params[0],"IDLE",par,u->server);
2494                                 }
2495                                 else
2496                                 {
2497                                         // not ours pass it on
2498                                         DoOneToOne(prefix,"IDLE",params,x->server);
2499                                 }
2500                         }
2501                         else if (params.size() == 3)
2502                         {
2503                                 std::string who_did_the_whois = params[0];
2504                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2505                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2506                                 {
2507                                         ServerInstance->Log(DEBUG,"Got final IDLE");
2508                                         // an incoming reply to a whois we sent out
2509                                         std::string nick_whoised = prefix;
2510                                         unsigned long signon = atoi(params[1].c_str());
2511                                         unsigned long idle = atoi(params[2].c_str());
2512                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2513                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2514                                 }
2515                                 else
2516                                 {
2517                                         // not ours, pass it on
2518                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2519                                 }
2520                         }
2521                 }
2522                 return true;
2523         }
2524
2525         bool Push(std::string prefix, std::deque<std::string> &params)
2526         {
2527                 if (params.size() < 2)
2528                         return true;
2529
2530                 userrec* u = this->Instance->FindNick(params[0]);
2531
2532                 if (!u)
2533                         return true;
2534
2535                 if (IS_LOCAL(u))
2536                 {
2537                         u->Write(params[1]);
2538                 }
2539                 else
2540                 {
2541                         // continue the raw onwards
2542                         params[1] = ":" + params[1];
2543                         DoOneToOne(prefix,"PUSH",params,u->server);
2544                 }
2545                 return true;
2546         }
2547
2548         bool Time(std::string prefix, std::deque<std::string> &params)
2549         {
2550                 // :source.server TIME remote.server sendernick
2551                 // :remote.server TIME source.server sendernick TS
2552                 if (params.size() == 2)
2553                 {
2554                         // someone querying our time?
2555                         if (this->Instance->Config->ServerName == params[0])
2556                         {
2557                                 userrec* u = this->Instance->FindNick(params[1]);
2558                                 if (u)
2559                                 {
2560                                         char curtime[256];
2561                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2562                                         params.push_back(curtime);
2563                                         params[0] = prefix;
2564                                         DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2565                                 }
2566                         }
2567                         else
2568                         {
2569                                 // not us, pass it on
2570                                 userrec* u = this->Instance->FindNick(params[1]);
2571                                 if (u)
2572                                         DoOneToOne(prefix,"TIME",params,params[0]);
2573                         }
2574                 }
2575                 else if (params.size() == 3)
2576                 {
2577                         // a response to a previous TIME
2578                         userrec* u = this->Instance->FindNick(params[1]);
2579                         if ((u) && (IS_LOCAL(u)))
2580                         {
2581                         time_t rawtime = atol(params[2].c_str());
2582                         struct tm * timeinfo;
2583                         timeinfo = localtime(&rawtime);
2584                                 char tms[26];
2585                                 snprintf(tms,26,"%s",asctime(timeinfo));
2586                                 tms[24] = 0;
2587                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2588                         }
2589                         else
2590                         {
2591                                 if (u)
2592                                         DoOneToOne(prefix,"TIME",params,u->server);
2593                         }
2594                 }
2595                 return true;
2596         }
2597
2598         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2599         {
2600                 if (params.size() < 1)
2601                         return true;
2602
2603                 if (params.size() == 1)
2604                 {
2605                         std::string stufftobounce = params[0];
2606                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2607                         return true;
2608                 }
2609                 else
2610                 {
2611                         std::string forwardto = params[1];
2612                         if (forwardto == this->Instance->Config->ServerName)
2613                         {
2614                                 // this is a ping for us, send back PONG to the requesting server
2615                                 params[1] = params[0];
2616                                 params[0] = forwardto;
2617                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2618                         }
2619                         else
2620                         {
2621                                 // not for us, pass it on :)
2622                                 DoOneToOne(prefix,"PING",params,forwardto);
2623                         }
2624                         return true;
2625                 }
2626         }
2627
2628         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2629         {
2630                 if (params.size() < 4)
2631                         return false;
2632
2633                 std::string servername = params[0];
2634                 std::string password = params[1];
2635                 // hopcount is not used for a remote server, we calculate this ourselves
2636                 std::string description = params[3];
2637                 TreeServer* ParentOfThis = FindServer(prefix);
2638
2639                 if (!ParentOfThis)
2640                 {
2641                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2642                         return false;
2643                 }
2644                 TreeServer* CheckDupe = FindServer(servername);
2645                 if (CheckDupe)
2646                 {
2647                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2648                         this->Instance->WriteOpers("*** Server connection from \2"+servername+"\2 denied, already exists");
2649                         return false;
2650                 }
2651                 TreeServer* Node = new TreeServer(this->Instance,servername,description,ParentOfThis,NULL);
2652                 ParentOfThis->AddChild(Node);
2653                 params[3] = ":" + params[3];
2654                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2655                 this->Instance->WriteOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2656                 return true;
2657         }
2658
2659         bool Outbound_Reply_Server(std::deque<std::string> &params)
2660         {
2661                 if (params.size() < 4)
2662                         return false;
2663
2664                 irc::string servername = params[0].c_str();
2665                 std::string sname = params[0];
2666                 std::string password = params[1];
2667                 int hops = atoi(params[2].c_str());
2668
2669                 if (hops)
2670                 {
2671                         this->WriteLine("ERROR :Server too far away for authentication");
2672                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2673                         return false;
2674                 }
2675                 std::string description = params[3];
2676                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2677                 {
2678                         if ((x->Name == servername) && (x->RecvPass == password))
2679                         {
2680                                 TreeServer* CheckDupe = FindServer(sname);
2681                                 if (CheckDupe)
2682                                 {
2683                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2684                                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2685                                         return false;
2686                                 }
2687                                 // Begin the sync here. this kickstarts the
2688                                 // other side, waiting in WAIT_AUTH_2 state,
2689                                 // into starting their burst, as it shows
2690                                 // that we're happy.
2691                                 this->LinkState = CONNECTED;
2692                                 // we should add the details of this server now
2693                                 // to the servers tree, as a child of the root
2694                                 // node.
2695                                 TreeServer* Node = new TreeServer(this->Instance,sname,description,TreeRoot,this);
2696                                 TreeRoot->AddChild(Node);
2697                                 params[3] = ":" + params[3];
2698                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2699                                 this->bursting = true;
2700                                 this->DoBurst(Node);
2701                                 return true;
2702                         }
2703                 }
2704                 this->WriteLine("ERROR :Invalid credentials");
2705                 this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2706                 return false;
2707         }
2708
2709         bool Inbound_Server(std::deque<std::string> &params)
2710         {
2711                 if (params.size() < 4)
2712                         return false;
2713
2714                 irc::string servername = params[0].c_str();
2715                 std::string sname = params[0];
2716                 std::string password = params[1];
2717                 int hops = atoi(params[2].c_str());
2718
2719                 if (hops)
2720                 {
2721                         this->WriteLine("ERROR :Server too far away for authentication");
2722                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2723                         return false;
2724                 }
2725                 std::string description = params[3];
2726                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2727                 {
2728                         if ((x->Name == servername) && (x->RecvPass == password))
2729                         {
2730                                 TreeServer* CheckDupe = FindServer(sname);
2731                                 if (CheckDupe)
2732                                 {
2733                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2734                                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2735                                         return false;
2736                                 }
2737                                 /* If the config says this link is encrypted, but the remote side
2738                                  * hasnt bothered to send the AES command before SERVER, then we
2739                                  * boot them off as we MUST have this connection encrypted.
2740                                  */
2741                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2742                                 {
2743                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2744                                         this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2745                                         return false;
2746                                 }
2747                                 this->Instance->WriteOpers("*** Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2748                                 this->InboundServerName = sname;
2749                                 this->InboundDescription = description;
2750                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2751                                 // along with the sendpass from this block.
2752                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2753                                 // move to the next state, we are now waiting for THEM.
2754                                 this->LinkState = WAIT_AUTH_2;
2755                                 return true;
2756                         }
2757                 }
2758                 this->WriteLine("ERROR :Invalid credentials");
2759                 this->Instance->WriteOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2760                 return false;
2761         }
2762
2763         void Split(std::string line, std::deque<std::string> &n)
2764         {
2765                 n.clear();
2766                 irc::tokenstream tokens(line);
2767                 std::string param;
2768                 while ((param = tokens.GetToken()) != "")
2769                         n.push_back(param);
2770                 return;
2771         }
2772
2773         bool ProcessLine(std::string line)
2774         {
2775                 std::deque<std::string> params;
2776                 irc::string command;
2777                 std::string prefix;
2778
2779                 if (line.empty())
2780                         return true;
2781
2782                 line = line.substr(0, line.find_first_of("\r\n"));
2783
2784                 ServerInstance->Log(DEBUG,"IN: %s", line.c_str());
2785
2786                 this->Split(line.c_str(),params);
2787
2788                 if ((params[0][0] == ':') && (params.size() > 1))
2789                 {
2790                         prefix = params[0].substr(1);
2791                         params.pop_front();
2792                 }
2793
2794                 command = params[0].c_str();
2795                 params.pop_front();
2796
2797                 if ((!this->ctx_in) && (command == "AES"))
2798                 {
2799                         std::string sserv = params[0];
2800                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2801                         {
2802                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2803                                 {
2804                                         this->InitAES(x->EncryptionKey,sserv);
2805                                 }
2806                         }
2807
2808                         return true;
2809                 }
2810                 else if ((this->ctx_in) && (command == "AES"))
2811                 {
2812                         this->Instance->WriteOpers("*** \2AES\2: Encryption already enabled on this connection yet %s is trying to enable it twice!",params[0].c_str());
2813                 }
2814
2815                 switch (this->LinkState)
2816                 {
2817                         TreeServer* Node;
2818
2819                         case WAIT_AUTH_1:
2820                                 // Waiting for SERVER command from remote server. Server initiating
2821                                 // the connection sends the first SERVER command, listening server
2822                                 // replies with theirs if its happy, then if the initiator is happy,
2823                                 // it starts to send its net sync, which starts the merge, otherwise
2824                                 // it sends an ERROR.
2825                                 if (command == "PASS")
2826                                 {
2827                                         /* Silently ignored */
2828                                 }
2829                                 else if (command == "SERVER")
2830                                 {
2831                                         return this->Inbound_Server(params);
2832                                 }
2833                                 else if (command == "ERROR")
2834                                 {
2835                                         return this->Error(params);
2836                                 }
2837                                 else if (command == "USER")
2838                                 {
2839                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2840                                         return false;
2841                                 }
2842                                 else if (command == "CAPAB")
2843                                 {
2844                                         return this->Capab(params);
2845                                 }
2846                                 else if ((command == "U") || (command == "S"))
2847                                 {
2848                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2849                                         return false;
2850                                 }
2851                                 else
2852                                 {
2853                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2854                                         return false;
2855                                 }
2856                         break;
2857                         case WAIT_AUTH_2:
2858                                 // Waiting for start of other side's netmerge to say they liked our
2859                                 // password.
2860                                 if (command == "SERVER")
2861                                 {
2862                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2863                                         // silently ignore.
2864                                         return true;
2865                                 }
2866                                 else if ((command == "U") || (command == "S"))
2867                                 {
2868                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2869                                         return false;
2870                                 }
2871                                 else if (command == "BURST")
2872                                 {
2873                                         if (params.size())
2874                                         {
2875                                                 /* If a time stamp is provided, try and check syncronization */
2876                                                 time_t THEM = atoi(params[0].c_str());
2877                                                 long delta = THEM-time(NULL);
2878                                                 if ((delta < -600) || (delta > 600))
2879                                                 {
2880                                                         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));
2881                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2882                                                         return false;
2883                                                 }
2884                                                 else if ((delta < -60) || (delta > 60))
2885                                                 {
2886                                                         this->Instance->WriteOpers("*** \2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2887                                                 }
2888                                         }
2889                                         this->LinkState = CONNECTED;
2890                                         Node = new TreeServer(this->Instance,InboundServerName,InboundDescription,TreeRoot,this);
2891                                         TreeRoot->AddChild(Node);
2892                                         params.clear();
2893                                         params.push_back(InboundServerName);
2894                                         params.push_back("*");
2895                                         params.push_back("1");
2896                                         params.push_back(":"+InboundDescription);
2897                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2898                                         this->bursting = true;
2899                                         this->DoBurst(Node);
2900                                 }
2901                                 else if (command == "ERROR")
2902                                 {
2903                                         return this->Error(params);
2904                                 }
2905                                 else if (command == "CAPAB")
2906                                 {
2907                                         return this->Capab(params);
2908                                 }
2909
2910                         break;
2911                         case LISTENER:
2912                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2913                                 return false;
2914                         break;
2915                         case CONNECTING:
2916                                 if (command == "SERVER")
2917                                 {
2918                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2919                                         // has just sent us their credentials. If we get this far, theyre
2920                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2921                                         // if we're happy with this, we should send our netburst which
2922                                         // kickstarts the merge.
2923                                         return this->Outbound_Reply_Server(params);
2924                                 }
2925                                 else if (command == "ERROR")
2926                                 {
2927                                         return this->Error(params);
2928                                 }
2929                         break;
2930                         case CONNECTED:
2931                                 // This is the 'authenticated' state, when all passwords
2932                                 // have been exchanged and anything past this point is taken
2933                                 // as gospel.
2934
2935                                 if (prefix != "")
2936                                 {
2937                                         std::string direction = prefix;
2938                                         userrec* t = this->Instance->FindNick(prefix);
2939                                         if (t)
2940                                         {
2941                                                 direction = t->server;
2942                                         }
2943                                         TreeServer* route_back_again = BestRouteTo(direction);
2944                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2945                                         {
2946                                                 if (route_back_again)
2947                                                         ServerInstance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2948                                                 return true;
2949                                         }
2950
2951                                         /* Fix by brain:
2952                                          * When there is activity on the socket, reset the ping counter so
2953                                          * that we're not wasting bandwidth pinging an active server.
2954                                          */
2955                                         route_back_again->SetNextPingTime(time(NULL) + 60);
2956                                         route_back_again->SetPingFlag();
2957                                 }
2958
2959                                 if (command == "SVSMODE")
2960                                 {
2961                                         /* Services expects us to implement
2962                                          * SVSMODE. In inspircd its the same as
2963                                          * MODE anyway.
2964                                          */
2965                                         command = "MODE";
2966                                 }
2967                                 std::string target = "";
2968                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
2969                                  * working with std::string here.
2970                                  */
2971                                 if ((command == "NICK") && (params.size() > 1))
2972                                 {
2973                                         return this->IntroduceClient(prefix,params);
2974                                 }
2975                                 else if (command == "FJOIN")
2976                                 {
2977                                         return this->ForceJoin(prefix,params);
2978                                 }
2979                                 else if (command == "STATS")
2980                                 {
2981                                         return this->Stats(prefix, params);
2982                                 }
2983                                 else if (command == "MOTD")
2984                                 {
2985                                         return this->Motd(prefix, params);
2986                                 }
2987                                 else if (command == "ADMIN")
2988                                 {
2989                                         return this->Admin(prefix, params);
2990                                 }
2991                                 else if (command == "SERVER")
2992                                 {
2993                                         return this->RemoteServer(prefix,params);
2994                                 }
2995                                 else if (command == "ERROR")
2996                                 {
2997                                         return this->Error(params);
2998                                 }
2999                                 else if (command == "OPERTYPE")
3000                                 {
3001                                         return this->OperType(prefix,params);
3002                                 }
3003                                 else if (command == "FMODE")
3004                                 {
3005                                         return this->ForceMode(prefix,params);
3006                                 }
3007                                 else if (command == "KILL")
3008                                 {
3009                                         return this->RemoteKill(prefix,params);
3010                                 }
3011                                 else if (command == "FTOPIC")
3012                                 {
3013                                         return this->ForceTopic(prefix,params);
3014                                 }
3015                                 else if (command == "REHASH")
3016                                 {
3017                                         return this->RemoteRehash(prefix,params);
3018                                 }
3019                                 else if (command == "METADATA")
3020                                 {
3021                                         return this->MetaData(prefix,params);
3022                                 }
3023                                 else if (command == "PING")
3024                                 {
3025                                         /*
3026                                          * We just got a ping from a server that's bursting.
3027                                          * This can't be right, so set them to not bursting, and
3028                                          * apply their lines.
3029                                          */
3030                                         if (this->bursting)
3031                                         {
3032                                                 this->bursting = false;
3033                                                 ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3034                                         }
3035                                         if (prefix == "")
3036                                         {
3037                                                 prefix = this->GetName();
3038                                         }
3039                                         return this->LocalPing(prefix,params);
3040                                 }
3041                                 else if (command == "PONG")
3042                                 {
3043                                         /*
3044                                          * We just got a pong from a server that's bursting.
3045                                          * This can't be right, so set them to not bursting, and
3046                                          * apply their lines.
3047                                          */
3048                                         if (this->bursting)
3049                                         {
3050                                                 this->bursting = false;
3051                                                 ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3052                                         }
3053                                         if (prefix == "")
3054                                         {
3055                                                 prefix = this->GetName();
3056                                         }
3057                                         return this->LocalPong(prefix,params);
3058                                 }
3059                                 else if (command == "VERSION")
3060                                 {
3061                                         return this->ServerVersion(prefix,params);
3062                                 }
3063                                 else if (command == "FHOST")
3064                                 {
3065                                         return this->ChangeHost(prefix,params);
3066                                 }
3067                                 else if (command == "FNAME")
3068                                 {
3069                                         return this->ChangeName(prefix,params);
3070                                 }
3071                                 else if (command == "ADDLINE")
3072                                 {
3073                                         return this->AddLine(prefix,params);
3074                                 }
3075                                 else if (command == "SVSNICK")
3076                                 {
3077                                         if (prefix == "")
3078                                         {
3079                                                 prefix = this->GetName();
3080                                         }
3081                                         return this->ForceNick(prefix,params);
3082                                 }
3083                                 else if (command == "IDLE")
3084                                 {
3085                                         return this->Whois(prefix,params);
3086                                 }
3087                                 else if (command == "PUSH")
3088                                 {
3089                                         return this->Push(prefix,params);
3090                                 }
3091                                 else if (command == "TIME")
3092                                 {
3093                                         return this->Time(prefix,params);
3094                                 }
3095                                 else if ((command == "KICK") && (IsServer(prefix)))
3096                                 {
3097                                         std::string sourceserv = this->myhost;
3098                                         if (params.size() == 3)
3099                                         {
3100                                                 userrec* user = this->Instance->FindNick(params[1]);
3101                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3102                                                 if (user && chan)
3103                                                 {
3104                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3105                                                                 /* Yikes, the channels gone! */
3106                                                                 delete chan;
3107                                                 }
3108                                         }
3109                                         if (this->InboundServerName != "")
3110                                         {
3111                                                 sourceserv = this->InboundServerName;
3112                                         }
3113                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3114                                 }
3115                                 else if (command == "SVSJOIN")
3116                                 {
3117                                         if (prefix == "")
3118                                         {
3119                                                 prefix = this->GetName();
3120                                         }
3121                                         return this->ServiceJoin(prefix,params);
3122                                 }
3123                                 else if (command == "SQUIT")
3124                                 {
3125                                         if (params.size() == 2)
3126                                         {
3127                                                 this->Squit(FindServer(params[0]),params[1]);
3128                                         }
3129                                         return true;
3130                                 }
3131                                 else if (command == "ENDBURST")
3132                                 {
3133                                         this->bursting = false;
3134                                         ServerInstance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3135                                         std::string sourceserv = this->myhost;
3136                                         if (this->InboundServerName != "")
3137                                         {
3138                                                 sourceserv = this->InboundServerName;
3139                                         }
3140                                         this->Instance->WriteOpers("*** Received end of netburst from \2%s\2",sourceserv.c_str());
3141                                         return true;
3142                                 }
3143                                 else
3144                                 {
3145                                         // not a special inter-server command.
3146                                         // Emulate the actual user doing the command,
3147                                         // this saves us having a huge ugly parser.
3148                                         userrec* who = this->Instance->FindNick(prefix);
3149                                         std::string sourceserv = this->myhost;
3150                                         if (this->InboundServerName != "")
3151                                         {
3152                                                 sourceserv = this->InboundServerName;
3153                                         }
3154                                         if (who)
3155                                         {
3156                                                 if ((command == "NICK") && (params.size() > 0))
3157                                                 {
3158                                                         /* On nick messages, check that the nick doesnt
3159                                                          * already exist here. If it does, kill their copy,
3160                                                          * and our copy.
3161                                                          */
3162                                                         userrec* x = this->Instance->FindNick(params[0]);
3163                                                         if ((x) && (x != who))
3164                                                         {
3165                                                                 std::deque<std::string> p;
3166                                                                 p.push_back(params[0]);
3167                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3168                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3169                                                                 p.clear();
3170                                                                 p.push_back(prefix);
3171                                                                 p.push_back("Nickname collision");
3172                                                                 DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3173                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3174                                                                 userrec* y = this->Instance->FindNick(prefix);
3175                                                                 if (y)
3176                                                                 {
3177                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3178                                                                 }
3179                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3180                                                         }
3181                                                 }
3182                                                 // its a user
3183                                                 target = who->server;
3184                                                 const char* strparams[127];
3185                                                 for (unsigned int q = 0; q < params.size(); q++)
3186                                                 {
3187                                                         strparams[q] = params[q].c_str();
3188                                                 }
3189                                                 if (!this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3190                                                 {
3191                                                         this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3192                                                         return false;
3193                                                 }
3194                                         }
3195                                         else
3196                                         {
3197                                                 // its not a user. Its either a server, or somethings screwed up.
3198                                                 if (IsServer(prefix))
3199                                                 {
3200                                                         target = this->Instance->Config->ServerName;
3201                                                 }
3202                                                 else
3203                                                 {
3204                                                         ServerInstance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3205                                                         return true;
3206                                                 }
3207                                         }
3208                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3209
3210                                 }
3211                                 return true;
3212                         break;
3213                 }
3214                 return true;
3215         }
3216
3217         virtual std::string GetName()
3218         {
3219                 std::string sourceserv = this->myhost;
3220                 if (this->InboundServerName != "")
3221                 {
3222                         sourceserv = this->InboundServerName;
3223                 }
3224                 return sourceserv;
3225         }
3226
3227         virtual void OnTimeout()
3228         {
3229                 if (this->LinkState == CONNECTING)
3230                 {
3231                         this->Instance->WriteOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
3232                 }
3233         }
3234
3235         virtual void OnClose()
3236         {
3237                 // Connection closed.
3238                 // If the connection is fully up (state CONNECTED)
3239                 // then propogate a netsplit to all peers.
3240                 std::string quitserver = this->myhost;
3241                 if (this->InboundServerName != "")
3242                 {
3243                         quitserver = this->InboundServerName;
3244                 }
3245                 TreeServer* s = FindServer(quitserver);
3246                 if (s)
3247                 {
3248                         Squit(s,"Remote host closed the connection");
3249                 }
3250                 this->Instance->WriteOpers("Server '\2%s\2' closed the connection.",quitserver.c_str());
3251         }
3252
3253         virtual int OnIncomingConnection(int newsock, char* ip)
3254         {
3255                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3256                  * or discovering if this port is the server port, we don't allow connections from any
3257                  * IPs for which we don't have a link block.
3258                  */
3259                 bool found = false;
3260
3261                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3262                 if (!found)
3263                 {
3264                         for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
3265                                 if (MatchCIDR(ip, (*i).c_str()))
3266                                         found = true;
3267
3268                         if (!found)
3269                         {
3270                                 this->Instance->WriteOpers("Server connection from %s denied (no link blocks with that IP address)", ip);
3271                                 close(newsock);
3272                                 return false;
3273                         }
3274                 }
3275                 TreeSocket* s = new TreeSocket(this->Instance, newsock, ip);
3276                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3277                 return true;
3278         }
3279 };
3280
3281 /** This class is used to resolve server hostnames during /connect and autoconnect.
3282  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3283  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3284  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3285  * will have an IP address which we can then use to continue our connection.
3286  */
3287 class ServernameResolver : public Resolver
3288 {
3289  private:
3290         /** A copy of the Link tag info for what we're connecting to.
3291          * We take a copy, rather than using a pointer, just in case the
3292          * admin takes the tag away and rehashes while the domain is resolving.
3293          */
3294         Link MyLink;
3295  public:
3296         ServernameResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3297         {
3298                 /* Nothing in here, folks */
3299         }
3300
3301         void OnLookupComplete(const std::string &result)
3302         {
3303                 /* Initiate the connection, now that we have an IP to use.
3304                  * Passing a hostname directly to InspSocket causes it to
3305                  * just bail and set its FD to -1.
3306                  */
3307                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3308                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3309                 {
3310                         TreeSocket* newsocket = new TreeSocket(ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3311                         if (newsocket->GetFd() > -1)
3312                         {
3313                                 /* We're all OK */
3314                         }
3315                         else
3316                         {
3317                                 /* Something barfed, show the opers */
3318                                 ServerInstance->WriteOpers("*** CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3319                                 delete newsocket;
3320                         }
3321                 }
3322         }
3323
3324         void OnError(ResolverError e, const std::string &errormessage)
3325         {
3326                 /* Ooops! */
3327                 ServerInstance->WriteOpers("*** CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3328         }
3329 };
3330
3331 class SecurityIPResolver : public Resolver
3332 {
3333  private:
3334         Link MyLink;
3335  public:
3336         SecurityIPResolver(InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x)
3337         {
3338         }
3339
3340         void OnLookupComplete(const std::string &result)
3341         {
3342                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3343                 ValidIPs.push_back(result);
3344         }
3345
3346         void OnError(ResolverError e, const std::string &errormessage)
3347         {
3348                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3349         }
3350 };
3351
3352 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3353 {
3354         for (unsigned int c = 0; c < list.size(); c++)
3355         {
3356                 if (list[c] == server)
3357                 {
3358                         return;
3359                 }
3360         }
3361         list.push_back(server);
3362 }
3363
3364 // returns a list of DIRECT servernames for a specific channel
3365 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3366 {
3367         CUList *ulist = c->GetUsers();
3368         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3369         {
3370                 if (i->second->GetFd() < 0)
3371                 {
3372                         TreeServer* best = BestRouteTo(i->second->server);
3373                         if (best)
3374                                 AddThisServer(best,list);
3375                 }
3376         }
3377         return;
3378 }
3379
3380 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3381 {
3382         TreeServer* omitroute = BestRouteTo(omit);
3383         if ((command == "NOTICE") || (command == "PRIVMSG"))
3384         {
3385                 if (params.size() >= 2)
3386                 {
3387                         /* Prefixes */
3388                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3389                         {
3390                                 params[0] = params[0].substr(1, params[0].length()-1);
3391                         }
3392                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3393                         {
3394                                 // special routing for private messages/notices
3395                                 userrec* d = ServerInstance->FindNick(params[0]);
3396                                 if (d)
3397                                 {
3398                                         std::deque<std::string> par;
3399                                         par.push_back(params[0]);
3400                                         par.push_back(":"+params[1]);
3401                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3402                                         return true;
3403                                 }
3404                         }
3405                         else if (*(params[0].c_str()) == '$')
3406                         {
3407                                 std::deque<std::string> par;
3408                                 par.push_back(params[0]);
3409                                 par.push_back(":"+params[1]);
3410                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3411                                 return true;
3412                         }
3413                         else
3414                         {
3415                                 ServerInstance->Log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3416                                 chanrec* c = ServerInstance->FindChan(params[0]);
3417                                 if (c)
3418                                 {
3419                                         std::deque<TreeServer*> list;
3420                                         GetListOfServersForChannel(c,list);
3421                                         ServerInstance->Log(DEBUG,"Got a list of %d servers",list.size());
3422                                         unsigned int lsize = list.size();
3423                                         for (unsigned int i = 0; i < lsize; i++)
3424                                         {
3425                                                 TreeSocket* Sock = list[i]->GetSocket();
3426                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3427                                                 {
3428                                                         ServerInstance->Log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3429                                                         Sock->WriteLine(data);
3430                                                 }
3431                                         }
3432                                         return true;
3433                                 }
3434                         }
3435                 }
3436         }
3437         unsigned int items = TreeRoot->ChildCount();
3438         for (unsigned int x = 0; x < items; x++)
3439         {
3440                 TreeServer* Route = TreeRoot->GetChild(x);
3441                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3442                 {
3443                         TreeSocket* Sock = Route->GetSocket();
3444                         if (Sock)
3445                                 Sock->WriteLine(data);
3446                 }
3447         }
3448         return true;
3449 }
3450
3451 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3452 {
3453         TreeServer* omitroute = BestRouteTo(omit);
3454         std::string FullLine = ":" + prefix + " " + command;
3455         unsigned int words = params.size();
3456         for (unsigned int x = 0; x < words; x++)
3457         {
3458                 FullLine = FullLine + " " + params[x];
3459         }
3460         unsigned int items = TreeRoot->ChildCount();
3461         for (unsigned int x = 0; x < items; x++)
3462         {
3463                 TreeServer* Route = TreeRoot->GetChild(x);
3464                 // Send the line IF:
3465                 // The route has a socket (its a direct connection)
3466                 // The route isnt the one to be omitted
3467                 // The route isnt the path to the one to be omitted
3468                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3469                 {
3470                         TreeSocket* Sock = Route->GetSocket();
3471                         if (Sock)
3472                                 Sock->WriteLine(FullLine);
3473                 }
3474         }
3475         return true;
3476 }
3477
3478 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3479 {
3480         std::string FullLine = ":" + prefix + " " + command;
3481         unsigned int words = params.size();
3482         for (unsigned int x = 0; x < words; x++)
3483         {
3484                 FullLine = FullLine + " " + params[x];
3485         }
3486         unsigned int items = TreeRoot->ChildCount();
3487         for (unsigned int x = 0; x < items; x++)
3488         {
3489                 TreeServer* Route = TreeRoot->GetChild(x);
3490                 if (Route && Route->GetSocket())
3491                 {
3492                         TreeSocket* Sock = Route->GetSocket();
3493                         if (Sock)
3494                                 Sock->WriteLine(FullLine);
3495                 }
3496         }
3497         return true;
3498 }
3499
3500 bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3501 {
3502         std::string spfx = prefix;
3503         std::string scmd = command;
3504         return DoOneToMany(spfx, scmd, params);
3505 }
3506
3507 bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3508 {
3509         std::string spfx = prefix;
3510         std::string scmd = command;
3511         return DoOneToAllButSender(spfx, scmd, params, omit);
3512 }
3513
3514 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3515 {
3516         TreeServer* Route = BestRouteTo(target);
3517         if (Route)
3518         {
3519                 std::string FullLine = ":" + prefix + " " + command;
3520                 unsigned int words = params.size();
3521                 for (unsigned int x = 0; x < words; x++)
3522                 {
3523                         FullLine = FullLine + " " + params[x];
3524                 }
3525                 if (Route && Route->GetSocket())
3526                 {
3527                         TreeSocket* Sock = Route->GetSocket();
3528                         if (Sock)
3529                                 Sock->WriteLine(FullLine);
3530                 }
3531                 return true;
3532         }
3533         else
3534         {
3535                 return false;
3536         }
3537 }
3538
3539 std::vector<TreeSocket*> Bindings;
3540
3541 void ReadConfiguration(bool rebind)
3542 {
3543         Conf = new ConfigReader(ServerInstance);
3544         if (rebind)
3545         {
3546                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3547                 {
3548                         std::string Type = Conf->ReadValue("bind","type",j);
3549                         std::string IP = Conf->ReadValue("bind","address",j);
3550                         long Port = Conf->ReadInteger("bind","port",j,true);
3551                         if (Type == "servers")
3552                         {
3553                                 if (IP == "*")
3554                                 {
3555                                         IP = "";
3556                                 }
3557                                 TreeSocket* listener = new TreeSocket(ServerInstance, IP.c_str(),Port,true,10);
3558                                 if (listener->GetState() == I_LISTENING)
3559                                 {
3560                                         Bindings.push_back(listener);
3561                                 }
3562                                 else
3563                                 {
3564                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3565                                         listener->Close();
3566                                         DELETE(listener);
3567                                 }
3568                         }
3569                 }
3570         }
3571         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3572         HideULines = Conf->ReadFlag("options","hideulines",0);
3573         LinkBlocks.clear();
3574         ValidIPs.clear();
3575         for (int j =0; j < Conf->Enumerate("link"); j++)
3576         {
3577                 Link L;
3578                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3579                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3580                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3581                 L.Port = Conf->ReadInteger("link","port",j,true);
3582                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3583                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3584                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3585                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3586                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3587                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3588                 /* Bugfix by brain, do not allow people to enter bad configurations */
3589                 if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3590                 {
3591                         ValidIPs.push_back(L.IPAddr);
3592
3593                         if (Allow.length())
3594                                 ValidIPs.push_back(Allow);
3595
3596                         /* Needs resolving */
3597                         insp_inaddr binip;
3598                         if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3599                         {
3600                                 try
3601                                 {
3602                                         SecurityIPResolver* sr = new SecurityIPResolver(ServerInstance, L.IPAddr, L);
3603                                         ServerInstance->AddResolver(sr);
3604                                 }
3605                                 catch (ModuleException& e)
3606                                 {
3607                                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3608                                 }
3609                         }
3610
3611                         LinkBlocks.push_back(L);
3612                         ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3613                 }
3614                 else
3615                 {
3616                         if (L.IPAddr == "")
3617                         {
3618                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3619                         }
3620                         else if (L.RecvPass == "")
3621                         {
3622                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3623                         }
3624                         else if (L.SendPass == "")
3625                         {
3626                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3627                         }
3628                         else if (L.Name == "")
3629                         {
3630                                 ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3631                         }
3632                         else if (!L.Port)
3633                         {
3634                                 ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3635                         }
3636                 }
3637         }
3638         DELETE(Conf);
3639 }
3640
3641
3642 class ModuleSpanningTree : public Module
3643 {
3644         std::vector<TreeSocket*> Bindings;
3645         int line;
3646         int NumServers;
3647         unsigned int max_local;
3648         unsigned int max_global;
3649         cmd_rconnect* command_rconnect;
3650
3651  public:
3652
3653         ModuleSpanningTree(InspIRCd* Me)
3654                 : Module::Module(Me), max_local(0), max_global(0)
3655         {
3656
3657                 Bindings.clear();
3658
3659                 ::ServerInstance = Me;
3660
3661                 // Create the root of the tree
3662                 TreeRoot = new TreeServer(ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3663
3664                 ReadConfiguration(true);
3665
3666                 command_rconnect = new cmd_rconnect(ServerInstance, this);
3667                 ServerInstance->AddCommand(command_rconnect);
3668         }
3669
3670         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3671         {
3672                 std::string Parent = TreeRoot->GetName();
3673                 if (Current->GetParent())
3674                 {
3675                         Parent = Current->GetParent()->GetName();
3676                 }
3677                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3678                 {
3679                         if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3680                         {
3681                                 if (*user->oper)
3682                                 {
3683                                          ShowLinks(Current->GetChild(q),user,hops+1);
3684                                 }
3685                         }
3686                         else
3687                         {
3688                                 ShowLinks(Current->GetChild(q),user,hops+1);
3689                         }
3690                 }
3691                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3692                 if ((HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3693                         return;
3694                 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());
3695         }
3696
3697         int CountLocalServs()
3698         {
3699                 return TreeRoot->ChildCount();
3700         }
3701
3702         int CountServs()
3703         {
3704                 return serverlist.size();
3705         }
3706
3707         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3708         {
3709                 ShowLinks(TreeRoot,user,0);
3710                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3711                 return;
3712         }
3713
3714         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3715         {
3716                 unsigned int n_users = ServerInstance->UserCount();
3717
3718                 /* Only update these when someone wants to see them, more efficient */
3719                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3720                         max_local = ServerInstance->LocalUserCount();
3721                 if (n_users > max_global)
3722                         max_global = n_users;
3723
3724                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3725                 if (ServerInstance->OperCount())
3726                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3727                 if (ServerInstance->UnregisteredUserCount())
3728                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3729                 if (ServerInstance->ChannelCount())
3730                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3731                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3732                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3733                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3734                 return;
3735         }
3736
3737         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3738
3739         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3740         {
3741                 if (line < 128)
3742                 {
3743                         for (int t = 0; t < depth; t++)
3744                         {
3745                                 matrix[line][t] = ' ';
3746                         }
3747
3748                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3749                         // a 'Spacer' String to compensate.
3750                         char spacer[40];
3751
3752                         memset(spacer,' ',40);
3753                         if ((40 - Current->GetName().length() - depth) > 1) {
3754                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3755                         }
3756                         else
3757                         {
3758                                 spacer[5] = '\0';
3759                         }
3760
3761                         float percent;
3762                         char text[80];
3763                         if (ServerInstance->clientlist.size() == 0) {
3764                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3765                                 percent = 0;
3766                         }
3767                         else
3768                         {
3769                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3770                         }
3771                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3772                         totusers += Current->GetUserCount();
3773                         totservers++;
3774                         strlcpy(&matrix[line][depth],text,80);
3775                         line++;
3776                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3777                         {
3778                                 if ((HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3779                                 {
3780                                         if (*user->oper)
3781                                         {
3782                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3783                                         }
3784                                 }
3785                                 else
3786                                 {
3787                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3788                                 }
3789                         }
3790                 }
3791         }
3792
3793         int HandleMotd(const char** parameters, int pcnt, userrec* user)
3794         {
3795                 if (pcnt > 0)
3796                 {
3797                         /* Remote MOTD, the server is within the 1st parameter */
3798                         std::deque<std::string> params;
3799                         params.push_back(parameters[0]);
3800
3801                         /* Send it out remotely, generate no reply yet */
3802                         TreeServer* s = FindServerMask(parameters[0]);
3803                         if (s)
3804                         {
3805                                 DoOneToOne(user->nick, "MOTD", params, s->GetName());
3806                         }
3807                         else
3808                         {
3809                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3810                         }
3811                         return 1;
3812                 }
3813                 return 0;
3814         }
3815
3816         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
3817         {
3818                 if (pcnt > 0)
3819                 {
3820                         /* Remote ADMIN, the server is within the 1st parameter */
3821                         std::deque<std::string> params;
3822                         params.push_back(parameters[0]);
3823
3824                         /* Send it out remotely, generate no reply yet */
3825                         TreeServer* s = FindServerMask(parameters[0]);
3826                         if (s)
3827                         {
3828                                 DoOneToOne(user->nick, "ADMIN", params, s->GetName());
3829                         }
3830                         else
3831                         {
3832                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3833                         }
3834                         return 1;
3835                 }
3836                 return 0;
3837         }
3838
3839         int HandleStats(const char** parameters, int pcnt, userrec* user)
3840         {
3841                 if (pcnt > 1)
3842                 {
3843                         /* Remote STATS, the server is within the 2nd parameter */
3844                         std::deque<std::string> params;
3845                         params.push_back(parameters[0]);
3846                         params.push_back(parameters[1]);
3847                         /* Send it out remotely, generate no reply yet */
3848                         TreeServer* s = FindServerMask(parameters[1]);
3849                         if (s)
3850                         {
3851                                 params[1] = s->GetName();
3852                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
3853                         }
3854                         else
3855                         {
3856                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
3857                         }
3858                         return 1;
3859                 }
3860                 return 0;
3861         }
3862
3863         // Ok, prepare to be confused.
3864         // After much mulling over how to approach this, it struck me that
3865         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3866         // keeping track of a ton of ascii characters, and line by line
3867         // under recursion working out where to place them using multiplications
3868         // and divisons, we instead render the map onto a backplane of characters
3869         // (a character matrix), then draw the branches as a series of "L" shapes
3870         // from the nodes. This is not only friendlier on CPU it uses less stack.
3871
3872         void HandleMap(const char** parameters, int pcnt, userrec* user)
3873         {
3874                 // This array represents a virtual screen which we will
3875                 // "scratch" draw to, as the console device of an irc
3876                 // client does not provide for a proper terminal.
3877                 float totusers = 0;
3878                 float totservers = 0;
3879                 char matrix[128][80];
3880                 for (unsigned int t = 0; t < 128; t++)
3881                 {
3882                         matrix[t][0] = '\0';
3883                 }
3884                 line = 0;
3885                 // The only recursive bit is called here.
3886                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3887                 // Process each line one by one. The algorithm has a limit of
3888                 // 128 servers (which is far more than a spanning tree should have
3889                 // anyway, so we're ok). This limit can be raised simply by making
3890                 // the character matrix deeper, 128 rows taking 10k of memory.
3891                 for (int l = 1; l < line; l++)
3892                 {
3893                         // scan across the line looking for the start of the
3894                         // servername (the recursive part of the algorithm has placed
3895                         // the servers at indented positions depending on what they
3896                         // are related to)
3897                         int first_nonspace = 0;
3898                         while (matrix[l][first_nonspace] == ' ')
3899                         {
3900                                 first_nonspace++;
3901                         }
3902                         first_nonspace--;
3903                         // Draw the `- (corner) section: this may be overwritten by
3904                         // another L shape passing along the same vertical pane, becoming
3905                         // a |- (branch) section instead.
3906                         matrix[l][first_nonspace] = '-';
3907                         matrix[l][first_nonspace-1] = '`';
3908                         int l2 = l - 1;
3909                         // Draw upwards until we hit the parent server, causing possibly
3910                         // other corners (`-) to become branches (|-)
3911                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3912                         {
3913                                 matrix[l2][first_nonspace-1] = '|';
3914                                 l2--;
3915                         }
3916                 }
3917                 // dump the whole lot to the user. This is the easy bit, honest.
3918                 for (int t = 0; t < line; t++)
3919                 {
3920                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
3921                 }
3922                 float avg_users = totusers / totservers;
3923                 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);
3924         user->WriteServ("007 %s :End of /MAP",user->nick);
3925                 return;
3926         }
3927
3928         int HandleSquit(const char** parameters, int pcnt, userrec* user)
3929         {
3930                 TreeServer* s = FindServerMask(parameters[0]);
3931                 if (s)
3932                 {
3933                         if (s == TreeRoot)
3934                         {
3935                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
3936                                 return 1;
3937                         }
3938                         TreeSocket* sock = s->GetSocket();
3939                         if (sock)
3940                         {
3941                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
3942                                 ServerInstance->WriteOpers("*** SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
3943                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
3944                                 ServerInstance->SE->DelFd(sock);
3945                                 sock->Close();
3946                                 delete sock;
3947                         }
3948                         else
3949                         {
3950                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
3951                         }
3952                 }
3953                 else
3954                 {
3955                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
3956                 }
3957                 return 1;
3958         }
3959
3960         int HandleTime(const char** parameters, int pcnt, userrec* user)
3961         {
3962                 if ((IS_LOCAL(user)) && (pcnt))
3963                 {
3964                         TreeServer* found = FindServerMask(parameters[0]);
3965                         if (found)
3966                         {
3967                                 // we dont' override for local server
3968                                 if (found == TreeRoot)
3969                                         return 0;
3970
3971                                 std::deque<std::string> params;
3972                                 params.push_back(found->GetName());
3973                                 params.push_back(user->nick);
3974                                 DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
3975                         }
3976                         else
3977                         {
3978                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
3979                         }
3980                 }
3981                 return 1;
3982         }
3983
3984         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
3985         {
3986                 if ((IS_LOCAL(user)) && (pcnt > 1))
3987                 {
3988                         userrec* remote = ServerInstance->FindNick(parameters[1]);
3989                         if ((remote) && (remote->GetFd() < 0))
3990                         {
3991                                 std::deque<std::string> params;
3992                                 params.push_back(parameters[1]);
3993                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
3994                                 return 1;
3995                         }
3996                         else if (!remote)
3997                         {
3998                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
3999                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4000                                 return 1;
4001                         }
4002                 }
4003                 return 0;
4004         }
4005
4006         void DoPingChecks(time_t curtime)
4007         {
4008                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
4009                 {
4010                         TreeServer* serv = TreeRoot->GetChild(j);
4011                         TreeSocket* sock = serv->GetSocket();
4012                         if (sock)
4013                         {
4014                                 if (curtime >= serv->NextPingTime())
4015                                 {
4016                                         if (serv->AnsweredLastPing())
4017                                         {
4018                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4019                                                 serv->SetNextPingTime(curtime + 60);
4020                                         }
4021                                         else
4022                                         {
4023                                                 // they didnt answer, boot them
4024                                                 ServerInstance->WriteOpers("*** Server \002%s\002 pinged out",serv->GetName().c_str());
4025                                                 sock->Squit(serv,"Ping timeout");
4026                                                 ServerInstance->SE->DelFd(sock);
4027                                                 sock->Close();
4028                                                 delete sock;
4029                                                 return;
4030                                         }
4031                                 }
4032                         }
4033                 }
4034         }
4035
4036         void AutoConnectServers(time_t curtime)
4037         {
4038                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4039                 {
4040                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4041                         {
4042                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4043                                 x->NextConnectTime = curtime + x->AutoConnect;
4044                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4045                                 if (!CheckDupe)
4046                                 {
4047                                         // an autoconnected server is not connected. Check if its time to connect it
4048                                         ServerInstance->WriteOpers("*** AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4049
4050                                         insp_inaddr binip;
4051
4052                                         /* Do we already have an IP? If so, no need to resolve it. */
4053                                         if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4054                                         {
4055                                                 TreeSocket* newsocket = new TreeSocket(ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4056                                                 if (newsocket->GetFd() > -1)
4057                                                 {
4058                                                 }
4059                                                 else
4060                                                 {
4061                                                         ServerInstance->WriteOpers("*** AUTOCONNECT: Error autoconnecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4062                                                         delete newsocket;
4063                                                 }
4064                                         }
4065                                         else
4066                                         {
4067                                                 try
4068                                                 {
4069                                                         ServernameResolver* snr = new ServernameResolver(ServerInstance,x->IPAddr, *x);
4070                                                         ServerInstance->AddResolver(snr);
4071                                                 }
4072                                                 catch (ModuleException& e)
4073                                                 {
4074                                                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4075                                                 }
4076                                         }
4077
4078                                 }
4079                         }
4080                 }
4081         }
4082
4083         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4084         {
4085                 // we've already checked if pcnt > 0, so this is safe
4086                 TreeServer* found = FindServerMask(parameters[0]);
4087                 if (found)
4088                 {
4089                         std::string Version = found->GetVersion();
4090                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4091                         if (found == TreeRoot)
4092                         {
4093                                 std::stringstream out(ServerInstance->Config->data005);
4094                                 std::string token = "";
4095                                 std::string line5 = "";
4096                                 int token_counter = 0;
4097
4098                                 while (!out.eof())
4099                                 {
4100                                         out >> token;
4101                                         line5 = line5 + token + " ";
4102                                         token_counter++;
4103
4104                                         if ((token_counter >= 13) || (out.eof() == true))
4105                                         {
4106                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4107                                                 line5 = "";
4108                                                 token_counter = 0;
4109                                         }
4110                                 }
4111                         }
4112                 }
4113                 else
4114                 {
4115                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4116                 }
4117                 return 1;
4118         }
4119
4120         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4121         {
4122                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
4123                 {
4124                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4125                         {
4126                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
4127                                 if (!CheckDupe)
4128                                 {
4129                                         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);
4130                                         insp_inaddr binip;
4131
4132                                         /* Do we already have an IP? If so, no need to resolve it. */
4133                                         if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4134                                         {
4135                                                 TreeSocket* newsocket = new TreeSocket(ServerInstance,x->IPAddr,x->Port,false,10,x->Name.c_str());
4136                                                 if (newsocket->GetFd() > -1)
4137                                                 {
4138                                                 }
4139                                                 else
4140                                                 {
4141                                                         ServerInstance->WriteOpers("*** CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4142                                                         delete newsocket;
4143                                                 }
4144                                         }
4145                                         else
4146                                         {
4147                                                 try
4148                                                 {
4149                                                         ServernameResolver* snr = new ServernameResolver(ServerInstance, x->IPAddr, *x);
4150                                                         ServerInstance->AddResolver(snr);
4151                                                 }
4152                                                 catch (ModuleException& e)
4153                                                 {
4154                                                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4155                                                 }
4156                                         }
4157                                         return 1;
4158                                 }
4159                                 else
4160                                 {
4161                                         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());
4162                                         return 1;
4163                                 }
4164                         }
4165                 }
4166                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4167                 return 1;
4168         }
4169
4170         virtual int OnStats(char statschar, userrec* user, string_list &results)
4171         {
4172                 if (statschar == 'c')
4173                 {
4174                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
4175                         {
4176                                 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');
4177                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
4178                         }
4179                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4180                         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);
4181                         return 1;
4182                 }
4183                 return 0;
4184         }
4185
4186         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated)
4187         {
4188                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4189                 if (!validated)
4190                         return 0;
4191
4192                 if (command == "CONNECT")
4193                 {
4194                         return this->HandleConnect(parameters,pcnt,user);
4195                 }
4196                 else if (command == "STATS")
4197                 {
4198                         return this->HandleStats(parameters,pcnt,user);
4199                 }
4200                 else if (command == "MOTD")
4201                 {
4202                         return this->HandleMotd(parameters,pcnt,user);
4203                 }
4204                 else if (command == "ADMIN")
4205                 {
4206                         return this->HandleAdmin(parameters,pcnt,user);
4207                 }
4208                 else if (command == "SQUIT")
4209                 {
4210                         return this->HandleSquit(parameters,pcnt,user);
4211                 }
4212                 else if (command == "MAP")
4213                 {
4214                         this->HandleMap(parameters,pcnt,user);
4215                         return 1;
4216                 }
4217                 else if ((command == "TIME") && (pcnt > 0))
4218                 {
4219                         return this->HandleTime(parameters,pcnt,user);
4220                 }
4221                 else if (command == "LUSERS")
4222                 {
4223                         this->HandleLusers(parameters,pcnt,user);
4224                         return 1;
4225                 }
4226                 else if (command == "LINKS")
4227                 {
4228                         this->HandleLinks(parameters,pcnt,user);
4229                         return 1;
4230                 }
4231                 else if (command == "WHOIS")
4232                 {
4233                         if (pcnt > 1)
4234                         {
4235                                 // remote whois
4236                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4237                         }
4238                 }
4239                 else if ((command == "VERSION") && (pcnt > 0))
4240                 {
4241                         this->HandleVersion(parameters,pcnt,user);
4242                         return 1;
4243                 }
4244                 else if (ServerInstance->IsValidModuleCommand(command, pcnt, user))
4245                 {
4246                         // this bit of code cleverly routes all module commands
4247                         // to all remote severs *automatically* so that modules
4248                         // can just handle commands locally, without having
4249                         // to have any special provision in place for remote
4250                         // commands and linking protocols.
4251                         std::deque<std::string> params;
4252                         params.clear();
4253                         for (int j = 0; j < pcnt; j++)
4254                         {
4255                                 if (strchr(parameters[j],' '))
4256                                 {
4257                                         params.push_back(":" + std::string(parameters[j]));
4258                                 }
4259                                 else
4260                                 {
4261                                         params.push_back(std::string(parameters[j]));
4262                                 }
4263                         }
4264                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4265                         DoOneToMany(user->nick,command,params);
4266                 }
4267                 return 0;
4268         }
4269
4270         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4271         {
4272                 TreeServer* s = FindServer(servername);
4273                 if (s)
4274                 {
4275                         description = s->GetDesc();
4276                 }
4277         }
4278
4279         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4280         {
4281                 if (IS_LOCAL(source))
4282                 {
4283                         std::deque<std::string> params;
4284                         params.push_back(dest->nick);
4285                         params.push_back(channel->name);
4286                         DoOneToMany(source->nick,"INVITE",params);
4287                 }
4288         }
4289
4290         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4291         {
4292                 std::deque<std::string> params;
4293                 params.push_back(chan->name);
4294                 params.push_back(":"+topic);
4295                 DoOneToMany(user->nick,"TOPIC",params);
4296         }
4297
4298         virtual void OnWallops(userrec* user, const std::string &text)
4299         {
4300                 if (IS_LOCAL(user))
4301                 {
4302                         std::deque<std::string> params;
4303                         params.push_back(":"+text);
4304                         DoOneToMany(user->nick,"WALLOPS",params);
4305                 }
4306         }
4307
4308         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4309         {
4310                 if (target_type == TYPE_USER)
4311                 {
4312                         userrec* d = (userrec*)dest;
4313                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4314                         {
4315                                 std::deque<std::string> params;
4316                                 params.clear();
4317                                 params.push_back(d->nick);
4318                                 params.push_back(":"+text);
4319                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4320                         }
4321                 }
4322                 else if (target_type == TYPE_CHANNEL)
4323                 {
4324                         if (IS_LOCAL(user))
4325                         {
4326                                 chanrec *c = (chanrec*)dest;
4327                                 if (c)
4328                                 {
4329                                         std::string cname = c->name;
4330                                         if (status)
4331                                                 cname = status + cname;
4332                                         std::deque<TreeServer*> list;
4333                                         GetListOfServersForChannel(c,list);
4334                                         unsigned int ucount = list.size();
4335                                         for (unsigned int i = 0; i < ucount; i++)
4336                                         {
4337                                                 TreeSocket* Sock = list[i]->GetSocket();
4338                                                 if (Sock)
4339                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4340                                         }
4341                                 }
4342                         }
4343                 }
4344                 else if (target_type == TYPE_SERVER)
4345                 {
4346                         if (IS_LOCAL(user))
4347                         {
4348                                 char* target = (char*)dest;
4349                                 std::deque<std::string> par;
4350                                 par.push_back(target);
4351                                 par.push_back(":"+text);
4352                                 DoOneToMany(user->nick,"NOTICE",par);
4353                         }
4354                 }
4355         }
4356
4357         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4358         {
4359                 if (target_type == TYPE_USER)
4360                 {
4361                         // route private messages which are targetted at clients only to the server
4362                         // which needs to receive them
4363                         userrec* d = (userrec*)dest;
4364                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4365                         {
4366                                 std::deque<std::string> params;
4367                                 params.clear();
4368                                 params.push_back(d->nick);
4369                                 params.push_back(":"+text);
4370                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4371                         }
4372                 }
4373                 else if (target_type == TYPE_CHANNEL)
4374                 {
4375                         if (IS_LOCAL(user))
4376                         {
4377                                 chanrec *c = (chanrec*)dest;
4378                                 if (c)
4379                                 {
4380                                         std::string cname = c->name;
4381                                         if (status)
4382                                                 cname = status + cname;
4383                                         std::deque<TreeServer*> list;
4384                                         GetListOfServersForChannel(c,list);
4385                                         unsigned int ucount = list.size();
4386                                         for (unsigned int i = 0; i < ucount; i++)
4387                                         {
4388                                                 TreeSocket* Sock = list[i]->GetSocket();
4389                                                 if (Sock)
4390                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4391                                         }
4392                                 }
4393                         }
4394                 }
4395                 else if (target_type == TYPE_SERVER)
4396                 {
4397                         if (IS_LOCAL(user))
4398                         {
4399                                 char* target = (char*)dest;
4400                                 std::deque<std::string> par;
4401                                 par.push_back(target);
4402                                 par.push_back(":"+text);
4403                                 DoOneToMany(user->nick,"PRIVMSG",par);
4404                         }
4405                 }
4406         }
4407
4408         virtual void OnBackgroundTimer(time_t curtime)
4409         {
4410                 AutoConnectServers(curtime);
4411                 DoPingChecks(curtime);
4412         }
4413
4414         virtual void OnUserJoin(userrec* user, chanrec* channel)
4415         {
4416                 // Only do this for local users
4417                 if (IS_LOCAL(user))
4418                 {
4419                         std::deque<std::string> params;
4420                         params.clear();
4421                         params.push_back(channel->name);
4422
4423                         if (channel->GetUserCounter() > 1)
4424                         {
4425                                 // not the first in the channel
4426                                 DoOneToMany(user->nick,"JOIN",params);
4427                         }
4428                         else
4429                         {
4430                                 // first in the channel, set up their permissions
4431                                 // and the channel TS with FJOIN.
4432                                 char ts[24];
4433                                 snprintf(ts,24,"%lu",(unsigned long)channel->age);
4434                                 params.clear();
4435                                 params.push_back(channel->name);
4436                                 params.push_back(ts);
4437                                 params.push_back("@,"+std::string(user->nick));
4438                                 DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4439                         }
4440                 }
4441         }
4442
4443         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4444         {
4445                 // only occurs for local clients
4446                 if (user->registered != REG_ALL)
4447                         return;
4448                 std::deque<std::string> params;
4449                 params.push_back(newhost);
4450                 DoOneToMany(user->nick,"FHOST",params);
4451         }
4452
4453         virtual void OnChangeName(userrec* user, const std::string &gecos)
4454         {
4455                 // only occurs for local clients
4456                 if (user->registered != REG_ALL)
4457                         return;
4458                 std::deque<std::string> params;
4459                 params.push_back(gecos);
4460                 DoOneToMany(user->nick,"FNAME",params);
4461         }
4462
4463         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4464         {
4465                 if (IS_LOCAL(user))
4466                 {
4467                         std::deque<std::string> params;
4468                         params.push_back(channel->name);
4469                         if (partmessage != "")
4470                                 params.push_back(":"+partmessage);
4471                         DoOneToMany(user->nick,"PART",params);
4472                 }
4473         }
4474
4475         virtual void OnUserConnect(userrec* user)
4476         {
4477                 char agestr[MAXBUF];
4478                 if (IS_LOCAL(user))
4479                 {
4480                         std::deque<std::string> params;
4481                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4482                         params.push_back(agestr);
4483                         params.push_back(user->nick);
4484                         params.push_back(user->host);
4485                         params.push_back(user->dhost);
4486                         params.push_back(user->ident);
4487                         params.push_back("+"+std::string(user->FormatModes()));
4488                         params.push_back(user->GetIPString());
4489                         params.push_back(":"+std::string(user->fullname));
4490                         DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4491
4492                         // User is Local, change needs to be reflected!
4493                         TreeServer* SourceServer = FindServer(user->server);
4494                         if (SourceServer)
4495                         {
4496                                 SourceServer->AddUserCount();
4497                         }
4498
4499                 }
4500         }
4501
4502         virtual void OnUserQuit(userrec* user, const std::string &reason)
4503         {
4504                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4505                 {
4506                         std::deque<std::string> params;
4507                         params.push_back(":"+reason);
4508                         DoOneToMany(user->nick,"QUIT",params);
4509                 }
4510                 // Regardless, We need to modify the user Counts..
4511                 TreeServer* SourceServer = FindServer(user->server);
4512                 if (SourceServer)
4513                 {
4514                         SourceServer->DelUserCount();
4515                 }
4516
4517         }
4518
4519         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4520         {
4521                 if (IS_LOCAL(user))
4522                 {
4523                         std::deque<std::string> params;
4524                         params.push_back(user->nick);
4525                         DoOneToMany(oldnick,"NICK",params);
4526                 }
4527         }
4528
4529         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4530         {
4531                 if ((source) && (IS_LOCAL(source)))
4532                 {
4533                         std::deque<std::string> params;
4534                         params.push_back(chan->name);
4535                         params.push_back(user->nick);
4536                         params.push_back(":"+reason);
4537                         DoOneToMany(source->nick,"KICK",params);
4538                 }
4539                 else if (!source)
4540                 {
4541                         std::deque<std::string> params;
4542                         params.push_back(chan->name);
4543                         params.push_back(user->nick);
4544                         params.push_back(":"+reason);
4545                         DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4546                 }
4547         }
4548
4549         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4550         {
4551                 std::deque<std::string> params;
4552                 params.push_back(dest->nick);
4553                 params.push_back(":"+reason);
4554                 DoOneToMany(source->nick,"KILL",params);
4555         }
4556
4557         virtual void OnRehash(const std::string &parameter)
4558         {
4559                 if (parameter != "")
4560                 {
4561                         std::deque<std::string> params;
4562                         params.push_back(parameter);
4563                         DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4564                         // check for self
4565                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4566                         {
4567                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4568                                 ServerInstance->RehashServer();
4569                         }
4570                 }
4571                 ReadConfiguration(false);
4572         }
4573
4574         // note: the protocol does not allow direct umode +o except
4575         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4576         // locally.
4577         virtual void OnOper(userrec* user, const std::string &opertype)
4578         {
4579                 if (IS_LOCAL(user))
4580                 {
4581                         std::deque<std::string> params;
4582                         params.push_back(opertype);
4583                         DoOneToMany(user->nick,"OPERTYPE",params);
4584                 }
4585         }
4586
4587         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4588         {
4589                 if (IS_LOCAL(source))
4590                 {
4591                         char type[8];
4592                         snprintf(type,8,"%cLINE",linetype);
4593                         std::string stype = type;
4594                         if (adding)
4595                         {
4596                                 char sduration[MAXBUF];
4597                                 snprintf(sduration,MAXBUF,"%ld",duration);
4598                                 std::deque<std::string> params;
4599                                 params.push_back(host);
4600                                 params.push_back(sduration);
4601                                 params.push_back(":"+reason);
4602                                 DoOneToMany(source->nick,stype,params);
4603                         }
4604                         else
4605                         {
4606                                 std::deque<std::string> params;
4607                                 params.push_back(host);
4608                                 DoOneToMany(source->nick,stype,params);
4609                         }
4610                 }
4611         }
4612
4613         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4614         {
4615                 OnLine(source,hostmask,true,'G',duration,reason);
4616         }
4617
4618         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4619         {
4620                 OnLine(source,ipmask,true,'Z',duration,reason);
4621         }
4622
4623         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4624         {
4625                 OnLine(source,nickmask,true,'Q',duration,reason);
4626         }
4627
4628         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4629         {
4630                 OnLine(source,hostmask,true,'E',duration,reason);
4631         }
4632
4633         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4634         {
4635                 OnLine(source,hostmask,false,'G',0,"");
4636         }
4637
4638         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4639         {
4640                 OnLine(source,ipmask,false,'Z',0,"");
4641         }
4642
4643         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4644         {
4645                 OnLine(source,nickmask,false,'Q',0,"");
4646         }
4647
4648         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4649         {
4650                 OnLine(source,hostmask,false,'E',0,"");
4651         }
4652
4653         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4654         {
4655                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4656                 {
4657                         if (target_type == TYPE_USER)
4658                         {
4659                                 userrec* u = (userrec*)dest;
4660                                 std::deque<std::string> params;
4661                                 params.push_back(u->nick);
4662                                 params.push_back(text);
4663                                 DoOneToMany(user->nick,"MODE",params);
4664                         }
4665                         else
4666                         {
4667                                 chanrec* c = (chanrec*)dest;
4668                                 std::deque<std::string> params;
4669                                 params.push_back(c->name);
4670                                 params.push_back(text);
4671                                 DoOneToMany(user->nick,"MODE",params);
4672                         }
4673                 }
4674         }
4675
4676         virtual void OnSetAway(userrec* user)
4677         {
4678                 if (IS_LOCAL(user))
4679                 {
4680                         std::deque<std::string> params;
4681                         params.push_back(":"+std::string(user->awaymsg));
4682                         DoOneToMany(user->nick,"AWAY",params);
4683                 }
4684         }
4685
4686         virtual void OnCancelAway(userrec* user)
4687         {
4688                 if (IS_LOCAL(user))
4689                 {
4690                         std::deque<std::string> params;
4691                         params.clear();
4692                         DoOneToMany(user->nick,"AWAY",params);
4693                 }
4694         }
4695
4696         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4697         {
4698                 TreeSocket* s = (TreeSocket*)opaque;
4699                 if (target)
4700                 {
4701                         if (target_type == TYPE_USER)
4702                         {
4703                                 userrec* u = (userrec*)target;
4704                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4705                         }
4706                         else
4707                         {
4708                                 chanrec* c = (chanrec*)target;
4709                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4710                         }
4711                 }
4712         }
4713
4714         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4715         {
4716                 TreeSocket* s = (TreeSocket*)opaque;
4717                 if (target)
4718                 {
4719                         if (target_type == TYPE_USER)
4720                         {
4721                                 userrec* u = (userrec*)target;
4722                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4723                         }
4724                         else if (target_type == TYPE_OTHER)
4725                         {
4726                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4727                         }
4728                         else if (target_type == TYPE_CHANNEL)
4729                         {
4730                                 chanrec* c = (chanrec*)target;
4731                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4732                         }
4733                 }
4734         }
4735
4736         virtual void OnEvent(Event* event)
4737         {
4738                 if (event->GetEventID() == "send_metadata")
4739                 {
4740                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4741                         if (params->size() < 3)
4742                                 return;
4743                         (*params)[2] = ":" + (*params)[2];
4744                         DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4745                 }
4746                 else if (event->GetEventID() == "send_mode")
4747                 {
4748                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4749                         if (params->size() < 2)
4750                                 return;
4751                         // Insert the TS value of the object, either userrec or chanrec
4752                         time_t ourTS = 0;
4753                         userrec* a = ServerInstance->FindNick((*params)[0]);
4754                         if (a)
4755                         {
4756                                 ourTS = a->age;
4757                         }
4758                         else
4759                         {
4760                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4761                                 if (a)
4762                                 {
4763                                         ourTS = a->age;
4764                                 }
4765                         }
4766                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4767                         DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4768                 }
4769         }
4770
4771         virtual ~ModuleSpanningTree()
4772         {
4773         }
4774
4775         virtual Version GetVersion()
4776         {
4777                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
4778         }
4779
4780         void Implements(char* List)
4781         {
4782                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
4783                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
4784                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
4785                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
4786                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
4787                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
4788                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = 1;
4789         }
4790
4791         /* It is IMPORTANT that m_spanningtree is the last module in the chain
4792          * so that any activity it sees is FINAL, e.g. we arent going to send out
4793          * a NICK message before m_cloaking has finished putting the +x on the user,
4794          * etc etc.
4795          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
4796          * the module call queue.
4797          */
4798         Priority Prioritize()
4799         {
4800                 return PRIORITY_LAST;
4801         }
4802 };
4803
4804
4805 class ModuleSpanningTreeFactory : public ModuleFactory
4806 {
4807  public:
4808         ModuleSpanningTreeFactory()
4809         {
4810         }
4811
4812         ~ModuleSpanningTreeFactory()
4813         {
4814         }
4815
4816         virtual Module * CreateModule(InspIRCd* Me)
4817         {
4818                 TreeProtocolModule = new ModuleSpanningTree(Me);
4819                 return TreeProtocolModule;
4820         }
4821
4822 };
4823
4824
4825 extern "C" void * init_module( void )
4826 {
4827         return new ModuleSpanningTreeFactory;
4828 }