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